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From jbel...@apache.org
Subject svn commit: r937592 - in /cassandra/trunk: CHANGES.txt conf/cassandra.yaml
Date Sat, 24 Apr 2010 04:43:56 GMT
Author: jbellis
Date: Sat Apr 24 04:43:56 2010
New Revision: 937592

URL: http://svn.apache.org/viewvc?rev=937592&view=rev
Log:
clean up comments in cassandra.yaml and update CHANGES

Modified:
    cassandra/trunk/CHANGES.txt
    cassandra/trunk/conf/cassandra.yaml

Modified: cassandra/trunk/CHANGES.txt
URL: http://svn.apache.org/viewvc/cassandra/trunk/CHANGES.txt?rev=937592&r1=937591&r2=937592&view=diff
==============================================================================
--- cassandra/trunk/CHANGES.txt (original)
+++ cassandra/trunk/CHANGES.txt Sat Apr 24 04:43:56 2010
@@ -17,6 +17,7 @@ dev
    (CASSANDRA-744)
  * re-organized endpointsnitch implementations and added SimpleSnitch
    (CASSANDRA-994)
+ * Added preload_row_cache option (CASSANDRA-946)
 
 
 0.6.1

Modified: cassandra/trunk/conf/cassandra.yaml
URL: http://svn.apache.org/viewvc/cassandra/trunk/conf/cassandra.yaml?rev=937592&r1=937591&r2=937592&view=diff
==============================================================================
--- cassandra/trunk/conf/cassandra.yaml (original)
+++ cassandra/trunk/conf/cassandra.yaml Sat Apr 24 04:43:56 2010
@@ -1,18 +1,21 @@
-# Cassandra storage config YAML
-# See http://wiki.apache.org/cassandra/StorageConfiguration for explanations of configuration
directives.
+# Cassandra storage config YAML 
+# See http://wiki.apache.org/cassandra/StorageConfiguration for
+# explanations of configuration directives.
 
 # name of the cluster
 cluster_name: 'Test Cluster'
 
-# Set to true to make new [non-seed] nodes automatically migrate the right data to themselves.

+# Set to true to make new [non-seed] nodes automatically migrate the
+# right data to themselves.
 auto_bootstrap: false
 
 # authentication backend, implementing IAuthenticator; used to limit keyspace access
 authenticator: org.apache.cassandra.auth.AllowAllAuthenticator
 
-# any IPartitioner may be used, including your own as long as it is on the classpath. 
-# Out of the box, Cassandra provides org.apache.cassandra.dht.RandomPartitioner
-# org.apache.cassandra.dht.OrderPreservingPartitioner, and 
+# any IPartitioner may be used, including your own as long as it is on
+# the classpath.  Out of the box, Cassandra provides
+# org.apache.cassandra.dht.RandomPartitioner
+# org.apache.cassandra.dht.OrderPreservingPartitioner, and
 # org.apache.cassandra.dht.CollatingOrderPreservingPartitioner.
 partitioner: org.apache.cassandra.dht.RandomPartitioner
 
@@ -21,8 +24,9 @@ data_file_directories:
     - /var/lib/cassandra/data
 
 # Addresses of hosts that are deemed contact points. 
-# Cassandra nodes use this list of hosts to find each other and learn the topology of the
ring. 
-# You must change this if you are running multiple nodes!
+# Cassandra nodes use this list of hosts to find each other and learn
+# the topology of the ring.  You must change this if you are running
+# multiple nodes!
 seeds:
     - 127.0.0.1
 
@@ -51,7 +55,8 @@ sliced_buffer_size_in_kb: 64
 # TCP port, for commands and data
 storage_port: 7000
 
-# Address to bind to and tell other nodes to connect to. You _must_ change this if you want
multiple nodes to be able to communicate!
+# Address to bind to and tell other nodes to connect to. You _must_
+# change this if you want multiple nodes to be able to communicate!
 listen_address: localhost
 
 # The address to bind the Thrift RPC service to
@@ -62,7 +67,8 @@ rpc_port: 9160
 thrift_framed_transport: false
 snapshot_before_compaction: false
 
-# The threshold size in megabytes the binary memtable must grow to, before it's submitted
for flushing to disk. 
+# The threshold size in megabytes the binary memtable must grow to,
+# before it's submitted for flushing to disk.
 binary_memtable_throughput_in_mb: 256
 # Number of minutes to keep a memtable in memory
 memtable_flush_after_mins: 60
@@ -72,7 +78,8 @@ memtable_throughput_in_mb: 64
 memtable_operations_in_millions: 0.3
 # Buffer size to use when flushing !memtables to disk.
 flush_data_buffer_size_in_mb: 32
-# Increase (decrease) the index buffer size relative to the data buffer if you have few (many)
columns per key.
+# Increase (decrease) the index buffer size relative to the data
+# buffer if you have few (many) columns per key.
 flush_index_buffer_size_in_mb: 8
 
 column_index_size_in_kb: 64
@@ -85,12 +92,15 @@ commitlog_directory: /var/lib/cassandra/
 commitlog_rotation_threshold_in_mb: 128
 
 # commitlog_sync may be either "periodic" or "batch." 
-# When in batch mode, Cassandra won't ack writes until the commit log has been fsynced to
disk. 
-# It will wait up to CommitLogSyncBatchWindowInMS milliseconds for other writes, before performing
the sync. 
+# When in batch mode, Cassandra won't ack writes until the commit log
+# has been fsynced to disk.  It will wait up to
+# CommitLogSyncBatchWindowInMS milliseconds for other writes, before
+# performing the sync.
 commitlog_sync: periodic
 
-# the other option is "timed," where writes may be acked immediately and the CommitLog 
-# is simply synced every commitlog_sync_period_in_ms milliseconds. 
+# the other option is "timed," where writes may be acked immediately
+# and the CommitLog is simply synced every commitlog_sync_period_in_ms
+# milliseconds.
 commitlog_sync_period_in_ms: 1000
 
 # Time to wait for a reply from other nodes before failing the command 
@@ -109,49 +119,50 @@ gc_grace_seconds: 864000
 endpoint_snitch: org.apache.cassandra.locator.SimpleSnitch
 
 # A ColumnFamily is the Cassandra concept closest to a relational table. 
-# Keyspaces are separate groups of ColumnFamilies. 
-# Except in very unusual circumstances you will have one Keyspace per application. 
 #
-# keyspace required parameters: name, replica_replacement_strategy, and replication_factor
+# Keyspaces are separate groups of ColumnFamilies.  Except in very
+# unusual circumstances you will have one Keyspace per application.
 #
-# name -- name of the keyspace; "system" and "definitions" are reserved for Cassandra Internals.
-#
-# replica_placement_strategy -- Strategy: Setting this to the class that implements
-# IReplicaPlacementStrategy will change the way the node picker works.
-# Out of the box, Cassandra provides
-# org.apache.cassandra.locator.RackUnawareStrategy and
-# org.apache.cassandra.locator.RackAwareStrategy (place one replica in
-# a different datacenter, and the others on different racks in the same one.)
-#
-#
-# replication_factor -- Number of replicas of the data
-#
-# column_families -- column families associated with this keyspace
-#
-# compare_with -- tells Cassandra how to sort the columns for slicing operations. The default
is BytesType, 
-# which is a straightforward lexical comparison of the bytes in each column. 
-# Other options are AsciiType, UTF8Type, LexicalUUIDType, TimeUUIDType, and LongType. 
-# You can also specify the fully-qualified class name to a class of your choice extending
org.apache.cassandra.db.marshal.AbstractType. 
-#
-#
-# keys_cached -- optional. defaults to 200000 keys. 
-# specifies the number of keys per sstable whose locations we keep in
-# memory in "mostly LRU" order.  (JUST the key locations, NOT any
-# column values.) Specify a fraction (value less than 1) or an absolute number of keys to
cache.
-#
-# rows_cached -- optional. defaults to 0. (i.e. row caching is off by default)
-# specifies the number of rows whose entire contents we cache in memory. Do not use this
on
-# ColumnFamilies with large rows, or ColumnFamilies with high write:read
-# ratios. Specify a fraction (value less than 1) or an absolute number of rows to cache.
-#
-#
-# comment -- optional. used to attach additional human-readable information about the column
family to its definition.
-#
-# 
-# read_repair_chance -- optional. must be between 0 and 1. defaults to 1.0 (always read repair).
-# specifies the probability with which read repairs should be invoked on non-quorum reads.
-# 
-# preloadRowCache -- Optional.  If true, will populate row cache on startup.
+# Keyspace required parameters:
+# - name: name of the keyspace; "system" and "definitions" are 
+#   reserved for Cassandra Internals.
+# - replica_placement_strategy: the class that determines how replicas
+#   are distributed among nodes.  Must implement IReplicaPlacementStrategy.
+#   Out of the box, Cassandra provides 
+#   org.apache.cassandra.locator.RackUnawareStrategy and
+#   org.apache.cassandra.locator.RackAwareStrategy.  RackAwareStrategy
+#   place one replica in each of two datacenter, and other replicas in
+#   different racks in one.
+# - replication_factor: Number of replicas of each row
+# - column_families: column families associated with this keyspace
+#
+# ColumnFamily required parameters:
+# - name: name of the ColumnFamily.  Must not contain the character "-".
+# - compare_with: tells Cassandra how to sort the columns for slicing
+#   operations. The default is BytesType, which is a straightforward
+#   lexical comparison of the bytes in each column.  Other options are
+#   AsciiType, UTF8Type, LexicalUUIDType, TimeUUIDType, and LongType.
+#   You can also specify the fully-qualified class name to a class of
+#   your choice extending org.apache.cassandra.db.marshal.AbstractType.
+#
+# ColumnFamily optional parameters:
+# - keys_cached: specifies the number of keys per sstable whose
+#   locations we keep in memory in "mostly LRU" order.  (JUST the key
+#   locations, NOT any column values.) Specify a fraction (value less
+#   than 1) or an absolute number of keys to cache.  Defaults to 200000
+#   keys.
+# - rows_cached: specifies the number of rows whose entire contents we
+#   cache in memory. Do not use this on ColumnFamilies with large rows,
+#   or ColumnFamilies with high write:read ratios. Specify a fraction
+#   (value less than 1) or an absolute number of rows to cache.
+#   Defaults to 0. (i.e. row caching is off by default)
+# - comment: used to attach additional human-readable information about 
+#   the column family to its definition.
+# - read_repair_chance: specifies the probability with which read
+#   repairs should be invoked on non-quorum reads.  must be between 0
+#   and 1. defaults to 1.0 (always read repair).
+# - preloadRowCache: If true, will populate row cache on startup.
+#   Defaults to false.
 #
 keyspaces:
     - name: Keyspace1



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