cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From tylerho...@apache.org
Subject svn commit: r1757435 [3/30] - in /cassandra/site/publish/doc: 3.10/ 3.10/architecture/ 3.10/configuration/ 3.10/cql/ 3.10/data_modeling/ 3.10/development/ 3.10/faq/ 3.10/getting_started/ 3.10/operating/ 3.10/tools/ 3.10/troubleshooting/ latest/ latest/...
Date Tue, 23 Aug 2016 20:58:09 GMT
Added: cassandra/site/publish/doc/3.10/configuration/cassandra_config_file.html
URL: http://svn.apache.org/viewvc/cassandra/site/publish/doc/3.10/configuration/cassandra_config_file.html?rev=1757435&view=auto
==============================================================================
--- cassandra/site/publish/doc/3.10/configuration/cassandra_config_file.html (added)
+++ cassandra/site/publish/doc/3.10/configuration/cassandra_config_file.html Tue Aug 23 20:58:08 2016
@@ -0,0 +1,1867 @@
+<!DOCTYPE html>
+<html>
+  
+
+
+
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="description" content="The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data. Cassandra's support for replicating across multiple datacenters is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages.
+">
+  <meta name="keywords" content="cassandra, apache, apache cassandra, distributed storage, key value store, scalability, bigtable, dynamo" />
+  <meta name="robots" content="index,follow" />
+  <meta name="language" content="en" />  
+
+  <title>Documentation</title>
+
+  <link rel="canonical" href="http://cassandra.apache.org/doc/3.10/configuration/cassandra_config_file.html">
+
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
+  <link rel="stylesheet" href="./../../../css/style.css">
+  
+  <link rel="stylesheet" href="./../../../css/sphinx.css">
+  
+
+   <link rel="top" title="Apache Cassandra Documentation v3.10" href="../index.html"/> <link rel="up" title="Configuring Cassandra" href="index.html"/> <link rel="next" title="Operating Cassandra" href="../operating/index.html"/> <link rel="prev" title="Configuring Cassandra" href="index.html"/> 
+</head>
+
+  <body>
+    <!-- breadcrumbs -->
+<div class="topnav">
+  <div class="container breadcrumb-container">
+    <ul class="breadcrumb">
+      <li>
+        <div class="dropdown">
+          <img class="asf-logo" src="./../../../img/asf_feather.png" />
+          <a data-toggle="dropdown" href="#">Apache Software Foundation <span class="caret"></span></a>
+          <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
+            <li><a href="http://www.apache.org">Apache Homepage</a></li>
+            <li><a href="http://www.apache.org/licenses/">License</a></li>
+            <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+            <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+            <li><a href="http://www.apache.org/security/">Security</a></li>
+          </ul>
+        </div>
+      </li>
+
+      
+      <li><a href="./../../../">Apache Cassandra</a></li>
+      
+
+      
+        
+        <li><a href="./../../../doc">Documentation</a></li>
+        
+      
+
+      
+      <li><a href="./">Configuring Cassandra</a></li>
+      
+
+      
+      <li>Cassandra Configuration File</li>
+      
+    </ul>
+  </div>
+
+  <!-- navbar -->
+  <nav class="navbar navbar-default navbar-static-top" role="navigation">
+    <div class="container">
+      <div class="navbar-header">
+        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#cassandra-menu" aria-expanded="false">
+          <span class="sr-only">Toggle navigation</span>
+          <span class="icon-bar"></span>
+          <span class="icon-bar"></span>
+          <span class="icon-bar"></span>
+        </button>
+        <a class="navbar-brand" href="./../../../"><img src="./../../../img/cassandra_logo.png" alt="Apache Cassandra logo" /></a>
+      </div><!-- /.navbar-header -->
+
+      <div id="cassandra-menu" class="collapse navbar-collapse">
+        <ul class="nav navbar-nav navbar-right">
+          <li><a href="./../../../">Home</a></li>
+          <li><a href="./../../../download/">Download</a></li>
+          <li><a href="./../../../doc/">Documentation</a></li>
+          <li><a href="./../../../community/">Community</a></li>
+        </ul>
+      </div><!-- /#cassandra-menu -->
+
+      
+    </div>
+  </nav><!-- /.navbar -->
+</div><!-- /.topnav -->
+
+    <div class="container-fluid">
+  <div class="row">
+    <div class="col-md-2">
+      <div class="doc-navigation">
+        <div class="doc-menu" role="navigation">
+          <div class="navbar-header">
+            <button type="button" class="pull-left navbar-toggle" data-toggle="collapse" data-target=".sidebar-navbar-collapse">
+              <span class="sr-only">Toggle navigation</span>
+              <span class="icon-bar"></span>
+              <span class="icon-bar"></span>
+              <span class="icon-bar"></span>
+            </button>
+          </div>
+          <div class="navbar-collapse collapse sidebar-navbar-collapse">
+            <form id="doc-search-form" class="navbar-form" action="../search.html" method="get" role="search">
+              <div class="form-group">
+                <input type="text" size="30" class="form-control input-sm" name="q" placeholder="Search docs">
+                <input type="hidden" name="check_keywords" value="yes" />
+                <input type="hidden" name="area" value="default" />
+              </div>
+            </form>
+            
+            
+            
+            <ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="../getting_started/index.html">Getting Started</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../architecture/index.html">Architecture</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../data_modeling/index.html">Data Modeling</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../cql/index.html">The Cassandra Query Language (CQL)</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="index.html">Configuring Cassandra</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Cassandra Configuration File</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#cluster-name"><code class="docutils literal"><span class="pre">cluster_name</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#num-tokens"><code class="docutils literal"><span class="pre">num_tokens</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#allocate-tokens-for-keyspace"><code class="docutils literal"><span class="pre">allocate_tokens_for_keyspace</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#initial-token"><code class="docutils literal"><span class="pre">initial_token</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hinted-handoff-enabled"><code class="docutils literal"><span class="pre">hinted_handoff_enabled</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hinted-handoff-disabled-datacenters"><code class="docutils literal"><span class="pre">hinted_handoff_disabled_datacenters</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#max-hint-window-in-ms"><code class="docutils literal"><span class="pre">max_hint_window_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hinted-handoff-throttle-in-kb"><code class="docutils literal"><span class="pre">hinted_handoff_throttle_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#max-hints-delivery-threads"><code class="docutils literal"><span class="pre">max_hints_delivery_threads</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hints-directory"><code class="docutils literal"><span class="pre">hints_directory</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hints-flush-period-in-ms"><code class="docutils literal"><span class="pre">hints_flush_period_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#max-hints-file-size-in-mb"><code class="docutils literal"><span class="pre">max_hints_file_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#hints-compression"><code class="docutils literal"><span class="pre">hints_compression</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#batchlog-replay-throttle-in-kb"><code class="docutils literal"><span class="pre">batchlog_replay_throttle_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#authenticator"><code class="docutils literal"><span class="pre">authenticator</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#authorizer"><code class="docutils literal"><span class="pre">authorizer</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#role-manager"><code class="docutils literal"><span class="pre">role_manager</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#roles-validity-in-ms"><code class="docutils literal"><span class="pre">roles_validity_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#roles-update-interval-in-ms"><code class="docutils literal"><span class="pre">roles_update_interval_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#permissions-validity-in-ms"><code class="docutils literal"><span class="pre">permissions_validity_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#permissions-update-interval-in-ms"><code class="docutils literal"><span class="pre">permissions_update_interval_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#credentials-validity-in-ms"><code class="docutils literal"><span class="pre">credentials_validity_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#credentials-update-interval-in-ms"><code class="docutils literal"><span class="pre">credentials_update_interval_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#partitioner"><code class="docutils literal"><span class="pre">partitioner</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#data-file-directories"><code class="docutils literal"><span class="pre">data_file_directories</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-directory"><code class="docutils literal"><span class="pre">commitlog_directory</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cdc-enabled"><code class="docutils literal"><span class="pre">cdc_enabled</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cdc-raw-directory"><code class="docutils literal"><span class="pre">cdc_raw_directory</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#disk-failure-policy"><code class="docutils literal"><span class="pre">disk_failure_policy</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commit-failure-policy"><code class="docutils literal"><span class="pre">commit_failure_policy</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#prepared-statements-cache-size-mb"><code class="docutils literal"><span class="pre">prepared_statements_cache_size_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#thrift-prepared-statements-cache-size-mb"><code class="docutils literal"><span class="pre">thrift_prepared_statements_cache_size_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#key-cache-size-in-mb"><code class="docutils literal"><span class="pre">key_cache_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#key-cache-save-period"><code class="docutils literal"><span class="pre">key_cache_save_period</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#key-cache-keys-to-save"><code class="docutils literal"><span class="pre">key_cache_keys_to_save</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#row-cache-class-name"><code class="docutils literal"><span class="pre">row_cache_class_name</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#row-cache-size-in-mb"><code class="docutils literal"><span class="pre">row_cache_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#row-cache-save-period"><code class="docutils literal"><span class="pre">row_cache_save_period</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#row-cache-keys-to-save"><code class="docutils literal"><span class="pre">row_cache_keys_to_save</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#counter-cache-size-in-mb"><code class="docutils literal"><span class="pre">counter_cache_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#counter-cache-save-period"><code class="docutils literal"><span class="pre">counter_cache_save_period</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#counter-cache-keys-to-save"><code class="docutils literal"><span class="pre">counter_cache_keys_to_save</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#saved-caches-directory"><code class="docutils literal"><span class="pre">saved_caches_directory</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-sync"><code class="docutils literal"><span class="pre">commitlog_sync</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-sync-batch-window-in-ms"><code class="docutils literal"><span class="pre">commitlog_sync_batch_window_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#id1"><code class="docutils literal"><span class="pre">commitlog_sync</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-sync-period-in-ms"><code class="docutils literal"><span class="pre">commitlog_sync_period_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-segment-size-in-mb"><code class="docutils literal"><span class="pre">commitlog_segment_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-compression"><code class="docutils literal"><span class="pre">commitlog_compression</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#seed-provider"><code class="docutils literal"><span class="pre">seed_provider</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#concurrent-reads"><code class="docutils literal"><span class="pre">concurrent_reads</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#concurrent-writes"><code class="docutils literal"><span class="pre">concurrent_writes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#concurrent-counter-writes"><code class="docutils literal"><span class="pre">concurrent_counter_writes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#concurrent-materialized-view-writes"><code class="docutils literal"><span class="pre">concurrent_materialized_view_writes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#file-cache-size-in-mb"><code class="docutils literal"><span class="pre">file_cache_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#buffer-pool-use-heap-if-exhausted"><code class="docutils literal"><span class="pre">buffer_pool_use_heap_if_exhausted</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#disk-optimization-strategy"><code class="docutils literal"><span class="pre">disk_optimization_strategy</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#memtable-heap-space-in-mb"><code class="docutils literal"><span class="pre">memtable_heap_space_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#memtable-offheap-space-in-mb"><code class="docutils literal"><span class="pre">memtable_offheap_space_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#memtable-cleanup-threshold"><code class="docutils literal"><span class="pre">memtable_cleanup_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#memtable-allocation-type"><code class="docutils literal"><span class="pre">memtable_allocation_type</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#commitlog-total-space-in-mb"><code class="docutils literal"><span class="pre">commitlog_total_space_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#memtable-flush-writers"><code class="docutils literal"><span class="pre">memtable_flush_writers</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cdc-total-space-in-mb"><code class="docutils literal"><span class="pre">cdc_total_space_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cdc-free-space-check-interval-ms"><code class="docutils literal"><span class="pre">cdc_free_space_check_interval_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#index-summary-capacity-in-mb"><code class="docutils literal"><span class="pre">index_summary_capacity_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#index-summary-resize-interval-in-minutes"><code class="docutils literal"><span class="pre">index_summary_resize_interval_in_minutes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#trickle-fsync"><code class="docutils literal"><span class="pre">trickle_fsync</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#trickle-fsync-interval-in-kb"><code class="docutils literal"><span class="pre">trickle_fsync_interval_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#storage-port"><code class="docutils literal"><span class="pre">storage_port</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#ssl-storage-port"><code class="docutils literal"><span class="pre">ssl_storage_port</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#listen-address"><code class="docutils literal"><span class="pre">listen_address</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#listen-interface"><code class="docutils literal"><span class="pre">listen_interface</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#listen-interface-prefer-ipv6"><code class="docutils literal"><span class="pre">listen_interface_prefer_ipv6</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#broadcast-address"><code class="docutils literal"><span class="pre">broadcast_address</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#listen-on-broadcast-address"><code class="docutils literal"><span class="pre">listen_on_broadcast_address</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#internode-authenticator"><code class="docutils literal"><span class="pre">internode_authenticator</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#start-native-transport"><code class="docutils literal"><span class="pre">start_native_transport</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-port"><code class="docutils literal"><span class="pre">native_transport_port</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-port-ssl"><code class="docutils literal"><span class="pre">native_transport_port_ssl</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-max-threads"><code class="docutils literal"><span class="pre">native_transport_max_threads</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-max-frame-size-in-mb"><code class="docutils literal"><span class="pre">native_transport_max_frame_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-max-concurrent-connections"><code class="docutils literal"><span class="pre">native_transport_max_concurrent_connections</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#native-transport-max-concurrent-connections-per-ip"><code class="docutils literal"><span class="pre">native_transport_max_concurrent_connections_per_ip</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#start-rpc"><code class="docutils literal"><span class="pre">start_rpc</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-address"><code class="docutils literal"><span class="pre">rpc_address</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-interface"><code class="docutils literal"><span class="pre">rpc_interface</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-interface-prefer-ipv6"><code class="docutils literal"><span class="pre">rpc_interface_prefer_ipv6</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-port"><code class="docutils literal"><span class="pre">rpc_port</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#broadcast-rpc-address"><code class="docutils literal"><span class="pre">broadcast_rpc_address</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-keepalive"><code class="docutils literal"><span class="pre">rpc_keepalive</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-server-type"><code class="docutils literal"><span class="pre">rpc_server_type</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-min-threads"><code class="docutils literal"><span class="pre">rpc_min_threads</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-max-threads"><code class="docutils literal"><span class="pre">rpc_max_threads</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-send-buff-size-in-bytes"><code class="docutils literal"><span class="pre">rpc_send_buff_size_in_bytes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#rpc-recv-buff-size-in-bytes"><code class="docutils literal"><span class="pre">rpc_recv_buff_size_in_bytes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#internode-send-buff-size-in-bytes"><code class="docutils literal"><span class="pre">internode_send_buff_size_in_bytes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#internode-recv-buff-size-in-bytes"><code class="docutils literal"><span class="pre">internode_recv_buff_size_in_bytes</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#thrift-framed-transport-size-in-mb"><code class="docutils literal"><span class="pre">thrift_framed_transport_size_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#incremental-backups"><code class="docutils literal"><span class="pre">incremental_backups</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#snapshot-before-compaction"><code class="docutils literal"><span class="pre">snapshot_before_compaction</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#auto-snapshot"><code class="docutils literal"><span class="pre">auto_snapshot</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#column-index-size-in-kb"><code class="docutils literal"><span class="pre">column_index_size_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#column-index-cache-size-in-kb"><code class="docutils literal"><span class="pre">column_index_cache_size_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#concurrent-compactors"><code class="docutils literal"><span class="pre">concurrent_compactors</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#compaction-throughput-mb-per-sec"><code class="docutils literal"><span class="pre">compaction_throughput_mb_per_sec</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#sstable-preemptive-open-interval-in-mb"><code class="docutils literal"><span class="pre">sstable_preemptive_open_interval_in_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#stream-throughput-outbound-megabits-per-sec"><code class="docutils literal"><span class="pre">stream_throughput_outbound_megabits_per_sec</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#inter-dc-stream-throughput-outbound-megabits-per-sec"><code class="docutils literal"><span class="pre">inter_dc_stream_throughput_outbound_megabits_per_sec</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#read-request-timeout-in-ms"><code class="docutils literal"><span class="pre">read_request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#range-request-timeout-in-ms"><code class="docutils literal"><span class="pre">range_request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#write-request-timeout-in-ms"><code class="docutils literal"><span class="pre">write_request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#counter-write-request-timeout-in-ms"><code class="docutils literal"><span class="pre">counter_write_request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cas-contention-timeout-in-ms"><code class="docutils literal"><span class="pre">cas_contention_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#truncate-request-timeout-in-ms"><code class="docutils literal"><span class="pre">truncate_request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#request-timeout-in-ms"><code class="docutils literal"><span class="pre">request_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#slow-query-log-timeout-in-ms"><code class="docutils literal"><span class="pre">slow_query_log_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#cross-node-timeout"><code class="docutils literal"><span class="pre">cross_node_timeout</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#streaming-socket-timeout-in-ms"><code class="docutils literal"><span class="pre">streaming_socket_timeout_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#phi-convict-threshold"><code class="docutils literal"><span class="pre">phi_convict_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#endpoint-snitch"><code class="docutils literal"><span class="pre">endpoint_snitch</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#dynamic-snitch-update-interval-in-ms"><code class="docutils literal"><span class="pre">dynamic_snitch_update_interval_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#dynamic-snitch-reset-interval-in-ms"><code class="docutils literal"><span class="pre">dynamic_snitch_reset_interval_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#dynamic-snitch-badness-threshold"><code class="docutils literal"><span class="pre">dynamic_snitch_badness_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#request-scheduler"><code class="docutils literal"><span class="pre">request_scheduler</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#request-scheduler-options"><code class="docutils literal"><span class="pre">request_scheduler_options</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#request-scheduler-id"><code class="docutils literal"><span class="pre">request_scheduler_id</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#server-encryption-options"><code class="docutils literal"><span class="pre">server_encryption_options</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#client-encryption-options"><code class="docutils literal"><span class="pre">client_encryption_options</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#internode-compression"><code class="docutils literal"><span class="pre">internode_compression</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#inter-dc-tcp-nodelay"><code class="docutils literal"><span class="pre">inter_dc_tcp_nodelay</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#tracetype-query-ttl"><code class="docutils literal"><span class="pre">tracetype_query_ttl</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#tracetype-repair-ttl"><code class="docutils literal"><span class="pre">tracetype_repair_ttl</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#gc-log-threshold-in-ms"><code class="docutils literal"><span class="pre">gc_log_threshold_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#enable-user-defined-functions"><code class="docutils literal"><span class="pre">enable_user_defined_functions</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#enable-scripted-user-defined-functions"><code class="docutils literal"><span class="pre">enable_scripted_user_defined_functions</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#windows-timer-interval"><code class="docutils literal"><span class="pre">windows_timer_interval</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#transparent-data-encryption-options"><code class="docutils literal"><span class="pre">transparent_data_encryption_options</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#tombstone-warn-threshold"><code class="docutils literal"><span class="pre">tombstone_warn_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#tombstone-failure-threshold"><code class="docutils literal"><span class="pre">tombstone_failure_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#batch-size-warn-threshold-in-kb"><code class="docutils literal"><span class="pre">batch_size_warn_threshold_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#batch-size-fail-threshold-in-kb"><code class="docutils literal"><span class="pre">batch_size_fail_threshold_in_kb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#unlogged-batch-across-partitions-warn-threshold"><code class="docutils literal"><span class="pre">unlogged_batch_across_partitions_warn_threshold</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#compaction-large-partition-warning-threshold-mb"><code class="docutils literal"><span class="pre">compaction_large_partition_warning_threshold_mb</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#gc-warn-threshold-in-ms"><code class="docutils literal"><span class="pre">gc_warn_threshold_in_ms</span></code></a></li>
+<li class="toctree-l3"><a class="reference internal" href="#max-value-size-in-mb"><code class="docutils literal"><span class="pre">max_value_size_in_mb</span></code></a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../operating/index.html">Operating Cassandra</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../tools/index.html">Cassandra Tools</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../troubleshooting/index.html">Troubleshooting</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../development/index.html">Cassandra Development</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../faq/index.html">Frequently Asked Questions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../bugs.html">Reporting Bugs and Contributing</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../contactus.html">Contact us</a></li>
+</ul>
+
+            
+            
+          </div><!--/.nav-collapse -->
+        </div>
+      </div>
+    </div>
+    <div class="col-md-8">
+      <div class="content doc-content">
+        <div class="container">
+          
+  <div class="section" id="cassandra-configuration-file">
+<span id="cassandra-yaml"></span><h1>Cassandra Configuration File<a class="headerlink" href="#cassandra-configuration-file" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="cluster-name">
+<h2><code class="docutils literal"><span class="pre">cluster_name</span></code><a class="headerlink" href="#cluster-name" title="Permalink to this headline">¶</a></h2>
+<p>The name of the cluster. This is mainly used to prevent machines in
+one logical cluster from joining another.</p>
+<p><em>Default Value:</em> &#8216;Test Cluster&#8217;</p>
+</div>
+<div class="section" id="num-tokens">
+<h2><code class="docutils literal"><span class="pre">num_tokens</span></code><a class="headerlink" href="#num-tokens" title="Permalink to this headline">¶</a></h2>
+<p>This defines the number of tokens randomly assigned to this node on the ring
+The more tokens, relative to other nodes, the larger the proportion of data
+that this node will store. You probably want all nodes to have the same number
+of tokens assuming they have equal hardware capability.</p>
+<p>If you leave this unspecified, Cassandra will use the default of 1 token for legacy compatibility,
+and will use the initial_token as described below.</p>
+<p>Specifying initial_token will override this setting on the node&#8217;s initial start,
+on subsequent starts, this setting will apply even if initial token is set.</p>
+<p>If you already have a cluster with 1 token per node, and wish to migrate to
+multiple tokens per node, see <a class="reference external" href="http://wiki.apache.org/cassandra/Operations">http://wiki.apache.org/cassandra/Operations</a></p>
+<p><em>Default Value:</em> 256</p>
+</div>
+<div class="section" id="allocate-tokens-for-keyspace">
+<h2><code class="docutils literal"><span class="pre">allocate_tokens_for_keyspace</span></code><a class="headerlink" href="#allocate-tokens-for-keyspace" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Triggers automatic allocation of num_tokens tokens for this node. The allocation
+algorithm attempts to choose tokens in a way that optimizes replicated load over
+the nodes in the datacenter for the replication strategy used by the specified
+keyspace.</p>
+<p>The load assigned to each node will be close to proportional to its number of
+vnodes.</p>
+<p>Only supported with the Murmur3Partitioner.</p>
+<p><em>Default Value:</em> KEYSPACE</p>
+</div>
+<div class="section" id="initial-token">
+<h2><code class="docutils literal"><span class="pre">initial_token</span></code><a class="headerlink" href="#initial-token" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>initial_token allows you to specify tokens manually.  While you can use it with
+vnodes (num_tokens &gt; 1, above) &#8211; in which case you should provide a
+comma-separated list &#8211; it&#8217;s primarily used when adding nodes to legacy clusters
+that do not have vnodes enabled.</p>
+</div>
+<div class="section" id="hinted-handoff-enabled">
+<h2><code class="docutils literal"><span class="pre">hinted_handoff_enabled</span></code><a class="headerlink" href="#hinted-handoff-enabled" title="Permalink to this headline">¶</a></h2>
+<p>See <a class="reference external" href="http://wiki.apache.org/cassandra/HintedHandoff">http://wiki.apache.org/cassandra/HintedHandoff</a>
+May either be &#8220;true&#8221; or &#8220;false&#8221; to enable globally</p>
+<p><em>Default Value:</em> true</p>
+</div>
+<div class="section" id="hinted-handoff-disabled-datacenters">
+<h2><code class="docutils literal"><span class="pre">hinted_handoff_disabled_datacenters</span></code><a class="headerlink" href="#hinted-handoff-disabled-datacenters" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>When hinted_handoff_enabled is true, a black list of data centers that will not
+perform hinted handoff</p>
+<p><em>Default Value (complex option)</em>:</p>
+<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1">#    - DC1</span>
+<span class="c1">#    - DC2</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="max-hint-window-in-ms">
+<h2><code class="docutils literal"><span class="pre">max_hint_window_in_ms</span></code><a class="headerlink" href="#max-hint-window-in-ms" title="Permalink to this headline">¶</a></h2>
+<p>this defines the maximum amount of time a dead host will have hints
+generated.  After it has been dead this long, new hints for it will not be
+created until it has been seen alive and gone down again.</p>
+<p><em>Default Value:</em> 10800000 # 3 hours</p>
+</div>
+<div class="section" id="hinted-handoff-throttle-in-kb">
+<h2><code class="docutils literal"><span class="pre">hinted_handoff_throttle_in_kb</span></code><a class="headerlink" href="#hinted-handoff-throttle-in-kb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum throttle in KBs per second, per delivery thread.  This will be
+reduced proportionally to the number of nodes in the cluster.  (If there
+are two nodes in the cluster, each delivery thread will use the maximum
+rate; if there are three, each will throttle to half of the maximum,
+since we expect two nodes to be delivering hints simultaneously.)</p>
+<p><em>Default Value:</em> 1024</p>
+</div>
+<div class="section" id="max-hints-delivery-threads">
+<h2><code class="docutils literal"><span class="pre">max_hints_delivery_threads</span></code><a class="headerlink" href="#max-hints-delivery-threads" title="Permalink to this headline">¶</a></h2>
+<p>Number of threads with which to deliver hints;
+Consider increasing this number when you have multi-dc deployments, since
+cross-dc handoff tends to be slower</p>
+<p><em>Default Value:</em> 2</p>
+</div>
+<div class="section" id="hints-directory">
+<h2><code class="docutils literal"><span class="pre">hints_directory</span></code><a class="headerlink" href="#hints-directory" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Directory where Cassandra should store hints.
+If not set, the default directory is $CASSANDRA_HOME/data/hints.</p>
+<p><em>Default Value:</em>  /var/lib/cassandra/hints</p>
+</div>
+<div class="section" id="hints-flush-period-in-ms">
+<h2><code class="docutils literal"><span class="pre">hints_flush_period_in_ms</span></code><a class="headerlink" href="#hints-flush-period-in-ms" title="Permalink to this headline">¶</a></h2>
+<p>How often hints should be flushed from the internal buffers to disk.
+Will <em>not</em> trigger fsync.</p>
+<p><em>Default Value:</em> 10000</p>
+</div>
+<div class="section" id="max-hints-file-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">max_hints_file_size_in_mb</span></code><a class="headerlink" href="#max-hints-file-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size for a single hints file, in megabytes.</p>
+<p><em>Default Value:</em> 128</p>
+</div>
+<div class="section" id="hints-compression">
+<h2><code class="docutils literal"><span class="pre">hints_compression</span></code><a class="headerlink" href="#hints-compression" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Compression to apply to the hint files. If omitted, hints files
+will be written uncompressed. LZ4, Snappy, and Deflate compressors
+are supported.</p>
+<p><em>Default Value (complex option)</em>:</p>
+<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1">#   - class_name: LZ4Compressor</span>
+<span class="c1">#     parameters:</span>
+<span class="c1">#         -</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="batchlog-replay-throttle-in-kb">
+<h2><code class="docutils literal"><span class="pre">batchlog_replay_throttle_in_kb</span></code><a class="headerlink" href="#batchlog-replay-throttle-in-kb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum throttle in KBs per second, total. This will be
+reduced proportionally to the number of nodes in the cluster.</p>
+<p><em>Default Value:</em> 1024</p>
+</div>
+<div class="section" id="authenticator">
+<h2><code class="docutils literal"><span class="pre">authenticator</span></code><a class="headerlink" href="#authenticator" title="Permalink to this headline">¶</a></h2>
+<p>Authentication backend, implementing IAuthenticator; used to identify users
+Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator,
+PasswordAuthenticator}.</p>
+<ul class="simple">
+<li>AllowAllAuthenticator performs no checks - set it to disable authentication.</li>
+<li>PasswordAuthenticator relies on username/password pairs to authenticate
+users. It keeps usernames and hashed passwords in system_auth.credentials table.
+Please increase system_auth keyspace replication factor if you use this authenticator.
+If using PasswordAuthenticator, CassandraRoleManager must also be used (see below)</li>
+</ul>
+<p><em>Default Value:</em> AllowAllAuthenticator</p>
+</div>
+<div class="section" id="authorizer">
+<h2><code class="docutils literal"><span class="pre">authorizer</span></code><a class="headerlink" href="#authorizer" title="Permalink to this headline">¶</a></h2>
+<p>Authorization backend, implementing IAuthorizer; used to limit access/provide permissions
+Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer,
+CassandraAuthorizer}.</p>
+<ul class="simple">
+<li>AllowAllAuthorizer allows any action to any user - set it to disable authorization.</li>
+<li>CassandraAuthorizer stores permissions in system_auth.permissions table. Please
+increase system_auth keyspace replication factor if you use this authorizer.</li>
+</ul>
+<p><em>Default Value:</em> AllowAllAuthorizer</p>
+</div>
+<div class="section" id="role-manager">
+<h2><code class="docutils literal"><span class="pre">role_manager</span></code><a class="headerlink" href="#role-manager" title="Permalink to this headline">¶</a></h2>
+<p>Part of the Authentication &amp; Authorization backend, implementing IRoleManager; used
+to maintain grants and memberships between roles.
+Out of the box, Cassandra provides org.apache.cassandra.auth.CassandraRoleManager,
+which stores role information in the system_auth keyspace. Most functions of the
+IRoleManager require an authenticated login, so unless the configured IAuthenticator
+actually implements authentication, most of this functionality will be unavailable.</p>
+<ul class="simple">
+<li>CassandraRoleManager stores role data in the system_auth keyspace. Please
+increase system_auth keyspace replication factor if you use this role manager.</li>
+</ul>
+<p><em>Default Value:</em> CassandraRoleManager</p>
+</div>
+<div class="section" id="roles-validity-in-ms">
+<h2><code class="docutils literal"><span class="pre">roles_validity_in_ms</span></code><a class="headerlink" href="#roles-validity-in-ms" title="Permalink to this headline">¶</a></h2>
+<p>Validity period for roles cache (fetching granted roles can be an expensive
+operation depending on the role manager, CassandraRoleManager is one example)
+Granted roles are cached for authenticated sessions in AuthenticatedUser and
+after the period specified here, become eligible for (async) reload.
+Defaults to 2000, set to 0 to disable caching entirely.
+Will be disabled automatically for AllowAllAuthenticator.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="roles-update-interval-in-ms">
+<h2><code class="docutils literal"><span class="pre">roles_update_interval_in_ms</span></code><a class="headerlink" href="#roles-update-interval-in-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Refresh interval for roles cache (if enabled).
+After this interval, cache entries become eligible for refresh. Upon next
+access, an async reload is scheduled and the old value returned until it
+completes. If roles_validity_in_ms is non-zero, then this must be
+also.
+Defaults to the same value as roles_validity_in_ms.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="permissions-validity-in-ms">
+<h2><code class="docutils literal"><span class="pre">permissions_validity_in_ms</span></code><a class="headerlink" href="#permissions-validity-in-ms" title="Permalink to this headline">¶</a></h2>
+<p>Validity period for permissions cache (fetching permissions can be an
+expensive operation depending on the authorizer, CassandraAuthorizer is
+one example). Defaults to 2000, set to 0 to disable.
+Will be disabled automatically for AllowAllAuthorizer.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="permissions-update-interval-in-ms">
+<h2><code class="docutils literal"><span class="pre">permissions_update_interval_in_ms</span></code><a class="headerlink" href="#permissions-update-interval-in-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Refresh interval for permissions cache (if enabled).
+After this interval, cache entries become eligible for refresh. Upon next
+access, an async reload is scheduled and the old value returned until it
+completes. If permissions_validity_in_ms is non-zero, then this must be
+also.
+Defaults to the same value as permissions_validity_in_ms.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="credentials-validity-in-ms">
+<h2><code class="docutils literal"><span class="pre">credentials_validity_in_ms</span></code><a class="headerlink" href="#credentials-validity-in-ms" title="Permalink to this headline">¶</a></h2>
+<p>Validity period for credentials cache. This cache is tightly coupled to
+the provided PasswordAuthenticator implementation of IAuthenticator. If
+another IAuthenticator implementation is configured, this cache will not
+be automatically used and so the following settings will have no effect.
+Please note, credentials are cached in their encrypted form, so while
+activating this cache may reduce the number of queries made to the
+underlying table, it may not  bring a significant reduction in the
+latency of individual authentication attempts.
+Defaults to 2000, set to 0 to disable credentials caching.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="credentials-update-interval-in-ms">
+<h2><code class="docutils literal"><span class="pre">credentials_update_interval_in_ms</span></code><a class="headerlink" href="#credentials-update-interval-in-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Refresh interval for credentials cache (if enabled).
+After this interval, cache entries become eligible for refresh. Upon next
+access, an async reload is scheduled and the old value returned until it
+completes. If credentials_validity_in_ms is non-zero, then this must be
+also.
+Defaults to the same value as credentials_validity_in_ms.</p>
+<p><em>Default Value:</em> 2000</p>
+</div>
+<div class="section" id="partitioner">
+<h2><code class="docutils literal"><span class="pre">partitioner</span></code><a class="headerlink" href="#partitioner" title="Permalink to this headline">¶</a></h2>
+<p>The partitioner is responsible for distributing groups of rows (by
+partition key) across nodes in the cluster.  You should leave this
+alone for new clusters.  The partitioner can NOT be changed without
+reloading all data, so when upgrading you should set this to the
+same partitioner you were already using.</p>
+<p>Besides Murmur3Partitioner, partitioners included for backwards
+compatibility include RandomPartitioner, ByteOrderedPartitioner, and
+OrderPreservingPartitioner.</p>
+<p><em>Default Value:</em> org.apache.cassandra.dht.Murmur3Partitioner</p>
+</div>
+<div class="section" id="data-file-directories">
+<h2><code class="docutils literal"><span class="pre">data_file_directories</span></code><a class="headerlink" href="#data-file-directories" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Directories where Cassandra should store data on disk.  Cassandra
+will spread data evenly across them, subject to the granularity of
+the configured compaction strategy.
+If not set, the default directory is $CASSANDRA_HOME/data/data.</p>
+<p><em>Default Value (complex option)</em>:</p>
+<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1">#     - /var/lib/cassandra/data</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="commitlog-directory">
+<h2><code class="docutils literal"><span class="pre">commitlog_directory</span></code><a class="headerlink" href="#commitlog-directory" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em>
+commit log.  when running on magnetic HDD, this should be a
+separate spindle than the data directories.
+If not set, the default directory is $CASSANDRA_HOME/data/commitlog.</p>
+<p><em>Default Value:</em>  /var/lib/cassandra/commitlog</p>
+</div>
+<div class="section" id="cdc-enabled">
+<h2><code class="docutils literal"><span class="pre">cdc_enabled</span></code><a class="headerlink" href="#cdc-enabled" title="Permalink to this headline">¶</a></h2>
+<p>Enable / disable CDC functionality on a per-node basis. This modifies the logic used
+for write path allocation rejection (standard: never reject. cdc: reject Mutation
+containing a CDC-enabled table if at space limit in cdc_raw_directory).</p>
+<p><em>Default Value:</em> false</p>
+</div>
+<div class="section" id="cdc-raw-directory">
+<h2><code class="docutils literal"><span class="pre">cdc_raw_directory</span></code><a class="headerlink" href="#cdc-raw-directory" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>CommitLogSegments are moved to this directory on flush if cdc_enabled: true and the
+segment contains mutations for a CDC-enabled table. This should be placed on a
+separate spindle than the data directories. If not set, the default directory is
+$CASSANDRA_HOME/data/cdc_raw.</p>
+<p><em>Default Value:</em>  /var/lib/cassandra/cdc_raw</p>
+</div>
+<div class="section" id="disk-failure-policy">
+<h2><code class="docutils literal"><span class="pre">disk_failure_policy</span></code><a class="headerlink" href="#disk-failure-policy" title="Permalink to this headline">¶</a></h2>
+<p>Policy for data disk failures:</p>
+<dl class="docutils">
+<dt>die</dt>
+<dd>shut down gossip and client transports and kill the JVM for any fs errors or
+single-sstable errors, so the node can be replaced.</dd>
+<dt>stop_paranoid</dt>
+<dd>shut down gossip and client transports even for single-sstable errors,
+kill the JVM for errors during startup.</dd>
+<dt>stop</dt>
+<dd>shut down gossip and client transports, leaving the node effectively dead, but
+can still be inspected via JMX, kill the JVM for errors during startup.</dd>
+<dt>best_effort</dt>
+<dd>stop using the failed disk and respond to requests based on
+remaining available sstables.  This means you WILL see obsolete
+data at CL.ONE!</dd>
+<dt>ignore</dt>
+<dd>ignore fatal errors and let requests fail, as in pre-1.2 Cassandra</dd>
+</dl>
+<p><em>Default Value:</em> stop</p>
+</div>
+<div class="section" id="commit-failure-policy">
+<h2><code class="docutils literal"><span class="pre">commit_failure_policy</span></code><a class="headerlink" href="#commit-failure-policy" title="Permalink to this headline">¶</a></h2>
+<p>Policy for commit disk failures:</p>
+<dl class="docutils">
+<dt>die</dt>
+<dd>shut down gossip and Thrift and kill the JVM, so the node can be replaced.</dd>
+<dt>stop</dt>
+<dd>shut down gossip and Thrift, leaving the node effectively dead, but
+can still be inspected via JMX.</dd>
+<dt>stop_commit</dt>
+<dd>shutdown the commit log, letting writes collect but
+continuing to service reads, as in pre-2.0.5 Cassandra</dd>
+<dt>ignore</dt>
+<dd>ignore fatal errors and let the batches fail</dd>
+</dl>
+<p><em>Default Value:</em> stop</p>
+</div>
+<div class="section" id="prepared-statements-cache-size-mb">
+<h2><code class="docutils literal"><span class="pre">prepared_statements_cache_size_mb</span></code><a class="headerlink" href="#prepared-statements-cache-size-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size of the native protocol prepared statement cache</p>
+<p>Valid values are either &#8220;auto&#8221; (omitting the value) or a value greater 0.</p>
+<p>Note that specifying a too large value will result in long running GCs and possbily
+out-of-memory errors. Keep the value at a small fraction of the heap.</p>
+<p>If you constantly see &#8220;prepared statements discarded in the last minute because
+cache limit reached&#8221; messages, the first step is to investigate the root cause
+of these messages and check whether prepared statements are used correctly -
+i.e. use bind markers for variable parts.</p>
+<p>Do only change the default value, if you really have more prepared statements than
+fit in the cache. In most cases it is not neccessary to change this value.
+Constantly re-preparing statements is a performance penalty.</p>
+<p>Default value (&#8220;auto&#8221;) is 1/256th of the heap or 10MB, whichever is greater</p>
+</div>
+<div class="section" id="thrift-prepared-statements-cache-size-mb">
+<h2><code class="docutils literal"><span class="pre">thrift_prepared_statements_cache_size_mb</span></code><a class="headerlink" href="#thrift-prepared-statements-cache-size-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size of the Thrift prepared statement cache</p>
+<p>If you do not use Thrift at all, it is safe to leave this value at &#8220;auto&#8221;.</p>
+<p>See description of &#8216;prepared_statements_cache_size_mb&#8217; above for more information.</p>
+<p>Default value (&#8220;auto&#8221;) is 1/256th of the heap or 10MB, whichever is greater</p>
+</div>
+<div class="section" id="key-cache-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">key_cache_size_in_mb</span></code><a class="headerlink" href="#key-cache-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size of the key cache in memory.</p>
+<p>Each key cache hit saves 1 seek and each row cache hit saves 2 seeks at the
+minimum, sometimes more. The key cache is fairly tiny for the amount of
+time it saves, so it&#8217;s worthwhile to use it at large numbers.
+The row cache saves even more time, but must contain the entire row,
+so it is extremely space-intensive. It&#8217;s best to only use the
+row cache if you have hot rows or static rows.</p>
+<p>NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.</p>
+<p>Default value is empty to make it &#8220;auto&#8221; (min(5% of Heap (in MB), 100MB)). Set to 0 to disable key cache.</p>
+</div>
+<div class="section" id="key-cache-save-period">
+<h2><code class="docutils literal"><span class="pre">key_cache_save_period</span></code><a class="headerlink" href="#key-cache-save-period" title="Permalink to this headline">¶</a></h2>
+<p>Duration in seconds after which Cassandra should
+save the key cache. Caches are saved to saved_caches_directory as
+specified in this configuration file.</p>
+<p>Saved caches greatly improve cold-start speeds, and is relatively cheap in
+terms of I/O for the key cache. Row cache saving is much more expensive and
+has limited use.</p>
+<p>Default is 14400 or 4 hours.</p>
+<p><em>Default Value:</em> 14400</p>
+</div>
+<div class="section" id="key-cache-keys-to-save">
+<h2><code class="docutils literal"><span class="pre">key_cache_keys_to_save</span></code><a class="headerlink" href="#key-cache-keys-to-save" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Number of keys from the key cache to save
+Disabled by default, meaning all keys are going to be saved</p>
+<p><em>Default Value:</em> 100</p>
+</div>
+<div class="section" id="row-cache-class-name">
+<h2><code class="docutils literal"><span class="pre">row_cache_class_name</span></code><a class="headerlink" href="#row-cache-class-name" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Row cache implementation class name. Available implementations:</p>
+<dl class="docutils">
+<dt>org.apache.cassandra.cache.OHCProvider</dt>
+<dd>Fully off-heap row cache implementation (default).</dd>
+<dt>org.apache.cassandra.cache.SerializingCacheProvider</dt>
+<dd>This is the row cache implementation availabile
+in previous releases of Cassandra.</dd>
+</dl>
+<p><em>Default Value:</em> org.apache.cassandra.cache.OHCProvider</p>
+</div>
+<div class="section" id="row-cache-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">row_cache_size_in_mb</span></code><a class="headerlink" href="#row-cache-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size of the row cache in memory.
+Please note that OHC cache implementation requires some additional off-heap memory to manage
+the map structures and some in-flight memory during operations before/after cache entries can be
+accounted against the cache capacity. This overhead is usually small compared to the whole capacity.
+Do not specify more memory that the system can afford in the worst usual situation and leave some
+headroom for OS block level cache. Do never allow your system to swap.</p>
+<p>Default value is 0, to disable row caching.</p>
+<p><em>Default Value:</em> 0</p>
+</div>
+<div class="section" id="row-cache-save-period">
+<h2><code class="docutils literal"><span class="pre">row_cache_save_period</span></code><a class="headerlink" href="#row-cache-save-period" title="Permalink to this headline">¶</a></h2>
+<p>Duration in seconds after which Cassandra should save the row cache.
+Caches are saved to saved_caches_directory as specified in this configuration file.</p>
+<p>Saved caches greatly improve cold-start speeds, and is relatively cheap in
+terms of I/O for the key cache. Row cache saving is much more expensive and
+has limited use.</p>
+<p>Default is 0 to disable saving the row cache.</p>
+<p><em>Default Value:</em> 0</p>
+</div>
+<div class="section" id="row-cache-keys-to-save">
+<h2><code class="docutils literal"><span class="pre">row_cache_keys_to_save</span></code><a class="headerlink" href="#row-cache-keys-to-save" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Number of keys from the row cache to save.
+Specify 0 (which is the default), meaning all keys are going to be saved</p>
+<p><em>Default Value:</em> 100</p>
+</div>
+<div class="section" id="counter-cache-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">counter_cache_size_in_mb</span></code><a class="headerlink" href="#counter-cache-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>Maximum size of the counter cache in memory.</p>
+<p>Counter cache helps to reduce counter locks&#8217; contention for hot counter cells.
+In case of RF = 1 a counter cache hit will cause Cassandra to skip the read before
+write entirely. With RF &gt; 1 a counter cache hit will still help to reduce the duration
+of the lock hold, helping with hot counter cell updates, but will not allow skipping
+the read entirely. Only the local (clock, count) tuple of a counter cell is kept
+in memory, not the whole counter, so it&#8217;s relatively cheap.</p>
+<p>NOTE: if you reduce the size, you may not get you hottest keys loaded on startup.</p>
+<p>Default value is empty to make it &#8220;auto&#8221; (min(2.5% of Heap (in MB), 50MB)). Set to 0 to disable counter cache.
+NOTE: if you perform counter deletes and rely on low gcgs, you should disable the counter cache.</p>
+</div>
+<div class="section" id="counter-cache-save-period">
+<h2><code class="docutils literal"><span class="pre">counter_cache_save_period</span></code><a class="headerlink" href="#counter-cache-save-period" title="Permalink to this headline">¶</a></h2>
+<p>Duration in seconds after which Cassandra should
+save the counter cache (keys only). Caches are saved to saved_caches_directory as
+specified in this configuration file.</p>
+<p>Default is 7200 or 2 hours.</p>
+<p><em>Default Value:</em> 7200</p>
+</div>
+<div class="section" id="counter-cache-keys-to-save">
+<h2><code class="docutils literal"><span class="pre">counter_cache_keys_to_save</span></code><a class="headerlink" href="#counter-cache-keys-to-save" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Number of keys from the counter cache to save
+Disabled by default, meaning all keys are going to be saved</p>
+<p><em>Default Value:</em> 100</p>
+</div>
+<div class="section" id="saved-caches-directory">
+<h2><code class="docutils literal"><span class="pre">saved_caches_directory</span></code><a class="headerlink" href="#saved-caches-directory" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>saved caches
+If not set, the default directory is $CASSANDRA_HOME/data/saved_caches.</p>
+<p><em>Default Value:</em>  /var/lib/cassandra/saved_caches</p>
+</div>
+<div class="section" id="commitlog-sync">
+<h2><code class="docutils literal"><span class="pre">commitlog_sync</span></code><a class="headerlink" href="#commitlog-sync" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>commitlog_sync may be either &#8220;periodic&#8221; or &#8220;batch.&#8221;</p>
+<p>When in batch mode, Cassandra won&#8217;t ack writes until the commit log
+has been fsynced to disk.  It will wait
+commitlog_sync_batch_window_in_ms milliseconds between fsyncs.
+This window should be kept short because the writer threads will
+be unable to do extra work while waiting.  (You may need to increase
+concurrent_writes for the same reason.)</p>
+<p><em>Default Value:</em> batch</p>
+</div>
+<div class="section" id="commitlog-sync-batch-window-in-ms">
+<h2><code class="docutils literal"><span class="pre">commitlog_sync_batch_window_in_ms</span></code><a class="headerlink" href="#commitlog-sync-batch-window-in-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p><em>Default Value:</em> 2</p>
+</div>
+<div class="section" id="id1">
+<h2><code class="docutils literal"><span class="pre">commitlog_sync</span></code><a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h2>
+<p>the other option is &#8220;periodic&#8221; where writes may be acked immediately
+and the CommitLog is simply synced every commitlog_sync_period_in_ms
+milliseconds.</p>
+<p><em>Default Value:</em> periodic</p>
+</div>
+<div class="section" id="commitlog-sync-period-in-ms">
+<h2><code class="docutils literal"><span class="pre">commitlog_sync_period_in_ms</span></code><a class="headerlink" href="#commitlog-sync-period-in-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>Default Value:</em> 10000</p>
+</div>
+<div class="section" id="commitlog-segment-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">commitlog_segment_size_in_mb</span></code><a class="headerlink" href="#commitlog-segment-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>The size of the individual commitlog file segments.  A commitlog
+segment may be archived, deleted, or recycled once all the data
+in it (potentially from each columnfamily in the system) has been
+flushed to sstables.</p>
+<p>The default size is 32, which is almost always fine, but if you are
+archiving commitlog segments (see commitlog_archiving.properties),
+then you probably want a finer granularity of archiving; 8 or 16 MB
+is reasonable.
+Max mutation size is also configurable via max_mutation_size_in_kb setting in
+cassandra.yaml. The default is half the size commitlog_segment_size_in_mb * 1024.</p>
+<p>NOTE: If max_mutation_size_in_kb is set explicitly then commitlog_segment_size_in_mb must
+be set to at least twice the size of max_mutation_size_in_kb / 1024</p>
+<p><em>Default Value:</em> 32</p>
+</div>
+<div class="section" id="commitlog-compression">
+<h2><code class="docutils literal"><span class="pre">commitlog_compression</span></code><a class="headerlink" href="#commitlog-compression" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Compression to apply to the commit log. If omitted, the commit log
+will be written uncompressed.  LZ4, Snappy, and Deflate compressors
+are supported.</p>
+<p><em>Default Value (complex option)</em>:</p>
+<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1">#   - class_name: LZ4Compressor</span>
+<span class="c1">#     parameters:</span>
+<span class="c1">#         -</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="seed-provider">
+<h2><code class="docutils literal"><span class="pre">seed_provider</span></code><a class="headerlink" href="#seed-provider" title="Permalink to this headline">¶</a></h2>
+<p>any class that implements the SeedProvider interface and has a
+constructor that takes a Map&lt;String, String&gt; of parameters will do.</p>
+<p><em>Default Value (complex option)</em>:</p>
+<div class="highlight-default"><div class="highlight"><pre><span></span><span class="c1"># Addresses of hosts that are deemed contact points.</span>
+<span class="c1"># Cassandra nodes use this list of hosts to find each other and learn</span>
+<span class="c1"># the topology of the ring.  You must change this if you are running</span>
+<span class="c1"># multiple nodes!</span>
+<span class="o">-</span> <span class="n">class_name</span><span class="p">:</span> <span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">locator</span><span class="o">.</span><span class="n">SimpleSeedProvider</span>
+  <span class="n">parameters</span><span class="p">:</span>
+      <span class="c1"># seeds is actually a comma-delimited list of addresses.</span>
+      <span class="c1"># Ex: &quot;&lt;ip1&gt;,&lt;ip2&gt;,&lt;ip3&gt;&quot;</span>
+      <span class="o">-</span> <span class="n">seeds</span><span class="p">:</span> <span class="s2">&quot;127.0.0.1&quot;</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="concurrent-reads">
+<h2><code class="docutils literal"><span class="pre">concurrent_reads</span></code><a class="headerlink" href="#concurrent-reads" title="Permalink to this headline">¶</a></h2>
+<p>For workloads with more data than can fit in memory, Cassandra&#8217;s
+bottleneck will be reads that need to fetch data from
+disk. &#8220;concurrent_reads&#8221; should be set to (16 * number_of_drives) in
+order to allow the operations to enqueue low enough in the stack
+that the OS and drives can reorder them. Same applies to
+&#8220;concurrent_counter_writes&#8221;, since counter writes read the current
+values before incrementing and writing them back.</p>
+<p>On the other hand, since writes are almost never IO bound, the ideal
+number of &#8220;concurrent_writes&#8221; is dependent on the number of cores in
+your system; (8 * number_of_cores) is a good rule of thumb.</p>
+<p><em>Default Value:</em> 32</p>
+</div>
+<div class="section" id="concurrent-writes">
+<h2><code class="docutils literal"><span class="pre">concurrent_writes</span></code><a class="headerlink" href="#concurrent-writes" title="Permalink to this headline">¶</a></h2>
+<p><em>Default Value:</em> 32</p>
+</div>
+<div class="section" id="concurrent-counter-writes">
+<h2><code class="docutils literal"><span class="pre">concurrent_counter_writes</span></code><a class="headerlink" href="#concurrent-counter-writes" title="Permalink to this headline">¶</a></h2>
+<p><em>Default Value:</em> 32</p>
+</div>
+<div class="section" id="concurrent-materialized-view-writes">
+<h2><code class="docutils literal"><span class="pre">concurrent_materialized_view_writes</span></code><a class="headerlink" href="#concurrent-materialized-view-writes" title="Permalink to this headline">¶</a></h2>
+<p>For materialized view writes, as there is a read involved, so this should
+be limited by the less of concurrent reads or concurrent writes.</p>
+<p><em>Default Value:</em> 32</p>
+</div>
+<div class="section" id="file-cache-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">file_cache_size_in_mb</span></code><a class="headerlink" href="#file-cache-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Maximum memory to use for sstable chunk cache and buffer pooling.
+32MB of this are reserved for pooling buffers, the rest is used as an
+cache that holds uncompressed sstable chunks.
+Defaults to the smaller of 1/4 of heap or 512MB. This pool is allocated off-heap,
+so is in addition to the memory allocated for heap. The cache also has on-heap
+overhead which is roughly 128 bytes per chunk (i.e. 0.2% of the reserved size
+if the default 64k chunk size is used).
+Memory is only allocated when needed.</p>
+<p><em>Default Value:</em> 512</p>
+</div>
+<div class="section" id="buffer-pool-use-heap-if-exhausted">
+<h2><code class="docutils literal"><span class="pre">buffer_pool_use_heap_if_exhausted</span></code><a class="headerlink" href="#buffer-pool-use-heap-if-exhausted" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Flag indicating whether to allocate on or off heap when the sstable buffer
+pool is exhausted, that is when it has exceeded the maximum memory
+file_cache_size_in_mb, beyond which it will not cache buffers but allocate on request.</p>
+<p><em>Default Value:</em> true</p>
+</div>
+<div class="section" id="disk-optimization-strategy">
+<h2><code class="docutils literal"><span class="pre">disk_optimization_strategy</span></code><a class="headerlink" href="#disk-optimization-strategy" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>The strategy for optimizing disk read
+Possible values are:
+ssd (for solid state disks, the default)
+spinning (for spinning disks)</p>
+<p><em>Default Value:</em> ssd</p>
+</div>
+<div class="section" id="memtable-heap-space-in-mb">
+<h2><code class="docutils literal"><span class="pre">memtable_heap_space_in_mb</span></code><a class="headerlink" href="#memtable-heap-space-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Total permitted memory to use for memtables. Cassandra will stop
+accepting writes when the limit is exceeded until a flush completes,
+and will trigger a flush based on memtable_cleanup_threshold
+If omitted, Cassandra will set both to 1/4 the size of the heap.</p>
+<p><em>Default Value:</em> 2048</p>
+</div>
+<div class="section" id="memtable-offheap-space-in-mb">
+<h2><code class="docutils literal"><span class="pre">memtable_offheap_space_in_mb</span></code><a class="headerlink" href="#memtable-offheap-space-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p><em>Default Value:</em> 2048</p>
+</div>
+<div class="section" id="memtable-cleanup-threshold">
+<h2><code class="docutils literal"><span class="pre">memtable_cleanup_threshold</span></code><a class="headerlink" href="#memtable-cleanup-threshold" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>memtable_cleanup_threshold is deprecated. The default calculation
+is the only reasonable choice. See the comments on  memtable_flush_writers
+for more information.</p>
+<p>Ratio of occupied non-flushing memtable size to total permitted size
+that will trigger a flush of the largest memtable. Larger mct will
+mean larger flushes and hence less compaction, but also less concurrent
+flush activity which can make it difficult to keep your disks fed
+under heavy write load.</p>
+<p>memtable_cleanup_threshold defaults to 1 / (memtable_flush_writers + 1)</p>
+<p><em>Default Value:</em> 0.11</p>
+</div>
+<div class="section" id="memtable-allocation-type">
+<h2><code class="docutils literal"><span class="pre">memtable_allocation_type</span></code><a class="headerlink" href="#memtable-allocation-type" title="Permalink to this headline">¶</a></h2>
+<p>Specify the way Cassandra allocates and manages memtable memory.
+Options are:</p>
+<dl class="docutils">
+<dt>heap_buffers</dt>
+<dd>on heap nio buffers</dd>
+<dt>offheap_buffers</dt>
+<dd>off heap (direct) nio buffers</dd>
+<dt>offheap_objects</dt>
+<dd>off heap objects</dd>
+</dl>
+<p><em>Default Value:</em> heap_buffers</p>
+</div>
+<div class="section" id="commitlog-total-space-in-mb">
+<h2><code class="docutils literal"><span class="pre">commitlog_total_space_in_mb</span></code><a class="headerlink" href="#commitlog-total-space-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Total space to use for commit logs on disk.</p>
+<p>If space gets above this value, Cassandra will flush every dirty CF
+in the oldest segment and remove it.  So a small total commitlog space
+will tend to cause more flush activity on less-active columnfamilies.</p>
+<p>The default value is the smaller of 8192, and 1/4 of the total space
+of the commitlog volume.</p>
+<p><em>Default Value:</em> 8192</p>
+</div>
+<div class="section" id="memtable-flush-writers">
+<h2><code class="docutils literal"><span class="pre">memtable_flush_writers</span></code><a class="headerlink" href="#memtable-flush-writers" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>This sets the number of memtable flush writer threads per disk
+as well as the total number of memtables that can be flushed concurrently.
+These are generally a combination of compute and IO bound.</p>
+<p>Memtable flushing is more CPU efficient than memtable ingest and a single thread
+can keep up with the ingest rate of a whole server on a single fast disk
+until it temporarily becomes IO bound under contention typically with compaction.
+At that point you need multiple flush threads. At some point in the future
+it may become CPU bound all the time.</p>
+<p>You can tell if flushing is falling behind using the MemtablePool.BlockedOnAllocation
+metric which should be 0, but will be non-zero if threads are blocked waiting on flushing
+to free memory.</p>
+<p>memtable_flush_writers defaults to two for a single data directory.
+This means that two  memtables can be flushed concurrently to the single data directory.
+If you have multiple data directories the default is one memtable flushing at a time
+but the flush will use a thread per data directory so you will get two or more writers.</p>
+<p>Two is generally enough to flush on a fast disk [array] mounted as a single data directory.
+Adding more flush writers will result in smaller more frequent flushes that introduce more
+compaction overhead.</p>
+<p>There is a direct tradeoff between number of memtables that can be flushed concurrently
+and flush size and frequency. More is not better you just need enough flush writers
+to never stall waiting for flushing to free memory.</p>
+<p><em>Default Value:</em> 2</p>
+</div>
+<div class="section" id="cdc-total-space-in-mb">
+<h2><code class="docutils literal"><span class="pre">cdc_total_space_in_mb</span></code><a class="headerlink" href="#cdc-total-space-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Total space to use for change-data-capture logs on disk.</p>
+<p>If space gets above this value, Cassandra will throw WriteTimeoutException
+on Mutations including tables with CDC enabled. A CDCCompactor is responsible
+for parsing the raw CDC logs and deleting them when parsing is completed.</p>
+<p>The default value is the min of 4096 mb and 1/8th of the total space
+of the drive where cdc_raw_directory resides.</p>
+<p><em>Default Value:</em> 4096</p>
+</div>
+<div class="section" id="cdc-free-space-check-interval-ms">
+<h2><code class="docutils literal"><span class="pre">cdc_free_space_check_interval_ms</span></code><a class="headerlink" href="#cdc-free-space-check-interval-ms" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>When we hit our cdc_raw limit and the CDCCompactor is either running behind
+or experiencing backpressure, we check at the following interval to see if any
+new space for cdc-tracked tables has been made available. Default to 250ms</p>
+<p><em>Default Value:</em> 250</p>
+</div>
+<div class="section" id="index-summary-capacity-in-mb">
+<h2><code class="docutils literal"><span class="pre">index_summary_capacity_in_mb</span></code><a class="headerlink" href="#index-summary-capacity-in-mb" title="Permalink to this headline">¶</a></h2>
+<p>A fixed memory pool size in MB for for SSTable index summaries. If left
+empty, this will default to 5% of the heap size. If the memory usage of
+all index summaries exceeds this limit, SSTables with low read rates will
+shrink their index summaries in order to meet this limit.  However, this
+is a best-effort process. In extreme conditions Cassandra may need to use
+more than this amount of memory.</p>
+</div>
+<div class="section" id="index-summary-resize-interval-in-minutes">
+<h2><code class="docutils literal"><span class="pre">index_summary_resize_interval_in_minutes</span></code><a class="headerlink" href="#index-summary-resize-interval-in-minutes" title="Permalink to this headline">¶</a></h2>
+<p>How frequently index summaries should be resampled.  This is done
+periodically to redistribute memory from the fixed-size pool to sstables
+proportional their recent read rates.  Setting to -1 will disable this
+process, leaving existing index summaries at their current sampling level.</p>
+<p><em>Default Value:</em> 60</p>
+</div>
+<div class="section" id="trickle-fsync">
+<h2><code class="docutils literal"><span class="pre">trickle_fsync</span></code><a class="headerlink" href="#trickle-fsync" title="Permalink to this headline">¶</a></h2>
+<p>Whether to, when doing sequential writing, fsync() at intervals in
+order to force the operating system to flush the dirty
+buffers. Enable this to avoid sudden dirty buffer flushing from
+impacting read latencies. Almost always a good idea on SSDs; not
+necessarily on platters.</p>
+<p><em>Default Value:</em> false</p>
+</div>
+<div class="section" id="trickle-fsync-interval-in-kb">
+<h2><code class="docutils literal"><span class="pre">trickle_fsync_interval_in_kb</span></code><a class="headerlink" href="#trickle-fsync-interval-in-kb" title="Permalink to this headline">¶</a></h2>
+<p><em>Default Value:</em> 10240</p>
+</div>
+<div class="section" id="storage-port">
+<h2><code class="docutils literal"><span class="pre">storage_port</span></code><a class="headerlink" href="#storage-port" title="Permalink to this headline">¶</a></h2>
+<p>TCP port, for commands and data
+For security reasons, you should not expose this port to the internet.  Firewall it if needed.</p>
+<p><em>Default Value:</em> 7000</p>
+</div>
+<div class="section" id="ssl-storage-port">
+<h2><code class="docutils literal"><span class="pre">ssl_storage_port</span></code><a class="headerlink" href="#ssl-storage-port" title="Permalink to this headline">¶</a></h2>
+<p>SSL port, for encrypted communication.  Unused unless enabled in
+encryption_options
+For security reasons, you should not expose this port to the internet.  Firewall it if needed.</p>
+<p><em>Default Value:</em> 7001</p>
+</div>
+<div class="section" id="listen-address">
+<h2><code class="docutils literal"><span class="pre">listen_address</span></code><a class="headerlink" href="#listen-address" title="Permalink to this headline">¶</a></h2>
+<p>Address or interface to bind to and tell other Cassandra nodes to connect to.
+You _must_ change this if you want multiple nodes to be able to communicate!</p>
+<p>Set listen_address OR listen_interface, not both.</p>
+<p>Leaving it blank leaves it up to InetAddress.getLocalHost(). This
+will always do the Right Thing _if_ the node is properly configured
+(hostname, name resolution, etc), and the Right Thing is to use the
+address associated with the hostname (it might not be).</p>
+<p>Setting listen_address to 0.0.0.0 is always wrong.</p>
+<p><em>Default Value:</em> localhost</p>
+</div>
+<div class="section" id="listen-interface">
+<h2><code class="docutils literal"><span class="pre">listen_interface</span></code><a class="headerlink" href="#listen-interface" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Set listen_address OR listen_interface, not both. Interfaces must correspond
+to a single address, IP aliasing is not supported.</p>
+<p><em>Default Value:</em> eth0</p>
+</div>
+<div class="section" id="listen-interface-prefer-ipv6">
+<h2><code class="docutils literal"><span class="pre">listen_interface_prefer_ipv6</span></code><a class="headerlink" href="#listen-interface-prefer-ipv6" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>If you choose to specify the interface by name and the interface has an ipv4 and an ipv6 address
+you can specify which should be chosen using listen_interface_prefer_ipv6. If false the first ipv4
+address will be used. If true the first ipv6 address will be used. Defaults to false preferring
+ipv4. If there is only one address it will be selected regardless of ipv4/ipv6.</p>
+<p><em>Default Value:</em> false</p>
+</div>
+<div class="section" id="broadcast-address">
+<h2><code class="docutils literal"><span class="pre">broadcast_address</span></code><a class="headerlink" href="#broadcast-address" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Address to broadcast to other Cassandra nodes
+Leaving this blank will set it to the same value as listen_address</p>
+<p><em>Default Value:</em> 1.2.3.4</p>
+</div>
+<div class="section" id="listen-on-broadcast-address">
+<h2><code class="docutils literal"><span class="pre">listen_on_broadcast_address</span></code><a class="headerlink" href="#listen-on-broadcast-address" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>When using multiple physical network interfaces, set this
+to true to listen on broadcast_address in addition to
+the listen_address, allowing nodes to communicate in both
+interfaces.
+Ignore this property if the network configuration automatically
+routes  between the public and private networks such as EC2.</p>
+<p><em>Default Value:</em> false</p>
+</div>
+<div class="section" id="internode-authenticator">
+<h2><code class="docutils literal"><span class="pre">internode_authenticator</span></code><a class="headerlink" href="#internode-authenticator" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>Internode authentication backend, implementing IInternodeAuthenticator;
+used to allow/disallow connections from peer nodes.</p>
+<p><em>Default Value:</em> org.apache.cassandra.auth.AllowAllInternodeAuthenticator</p>
+</div>
+<div class="section" id="start-native-transport">
+<h2><code class="docutils literal"><span class="pre">start_native_transport</span></code><a class="headerlink" href="#start-native-transport" title="Permalink to this headline">¶</a></h2>
+<p>Whether to start the native transport server.
+Please note that the address on which the native transport is bound is the
+same as the rpc_address. The port however is different and specified below.</p>
+<p><em>Default Value:</em> true</p>
+</div>
+<div class="section" id="native-transport-port">
+<h2><code class="docutils literal"><span class="pre">native_transport_port</span></code><a class="headerlink" href="#native-transport-port" title="Permalink to this headline">¶</a></h2>
+<p>port for the CQL native transport to listen for clients on
+For security reasons, you should not expose this port to the internet.  Firewall it if needed.</p>
+<p><em>Default Value:</em> 9042</p>
+</div>
+<div class="section" id="native-transport-port-ssl">
+<h2><code class="docutils literal"><span class="pre">native_transport_port_ssl</span></code><a class="headerlink" href="#native-transport-port-ssl" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em>
+Enabling native transport encryption in client_encryption_options allows you to either use
+encryption for the standard port or to use a dedicated, additional port along with the unencrypted
+standard native_transport_port.
+Enabling client encryption and keeping native_transport_port_ssl disabled will use encryption
+for native_transport_port. Setting native_transport_port_ssl to a different value
+from native_transport_port will use encryption for native_transport_port_ssl while
+keeping native_transport_port unencrypted.</p>
+<p><em>Default Value:</em> 9142</p>
+</div>
+<div class="section" id="native-transport-max-threads">
+<h2><code class="docutils literal"><span class="pre">native_transport_max_threads</span></code><a class="headerlink" href="#native-transport-max-threads" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em>
+The maximum threads for handling requests when the native transport is used.
+This is similar to rpc_max_threads though the default differs slightly (and
+there is no native_transport_min_threads, idle threads will always be stopped
+after 30 seconds).</p>
+<p><em>Default Value:</em> 128</p>
+</div>
+<div class="section" id="native-transport-max-frame-size-in-mb">
+<h2><code class="docutils literal"><span class="pre">native_transport_max_frame_size_in_mb</span></code><a class="headerlink" href="#native-transport-max-frame-size-in-mb" title="Permalink to this headline">¶</a></h2>
+<p><em>This option is commented out by default.</em></p>
+<p>The maximum size of allowed frame. Frame (requests) larger than this will
+be rejected as invalid. The default is 256MB. If you&#8217;re changing this parameter,
+you may want to adjust max_value_size_in_mb accordingly.</p>
+<p><em>Default Value:</em> 256</p>
+</div>
+<div class="section" id="native-transport-max-concurrent-connections">
+<h2><code class="docutils literal"><span class="pre">native_transport_max_concurrent_connections</span></code><a class="headerlink" href="#native-transport-max-concurrent-connections" title="Permalink to this headline">¶</a></h2>

[... 765 lines stripped ...]



Mime
View raw message