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From syuanji...@apache.org
Subject [37/37] hbase git commit: HBASE-15351 Fix description of hbase.bucketcache.size in hbase-default.xml
Date Fri, 26 Feb 2016 23:09:58 GMT
HBASE-15351 Fix description of hbase.bucketcache.size in hbase-default.xml


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/8f6e2978
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/8f6e2978
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/8f6e2978

Branch: refs/heads/hbase-12439
Commit: 8f6e29785abff6b3205d7058d9b88c1cf27faa29
Parents: 3c660e2
Author: stack <stack@apache.org>
Authored: Fri Feb 26 13:49:26 2016 -0800
Committer: stack <stack@apache.org>
Committed: Fri Feb 26 13:49:26 2016 -0800

----------------------------------------------------------------------
 .../src/main/resources/hbase-default.xml        | 28 ++++++++++++--------
 1 file changed, 17 insertions(+), 11 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hbase/blob/8f6e2978/hbase-common/src/main/resources/hbase-default.xml
----------------------------------------------------------------------
diff --git a/hbase-common/src/main/resources/hbase-default.xml b/hbase-common/src/main/resources/hbase-default.xml
index e446a24..e50e89e 100644
--- a/hbase-common/src/main/resources/hbase-default.xml
+++ b/hbase-common/src/main/resources/hbase-default.xml
@@ -857,29 +857,35 @@ possible configurations would overwhelm and obscure the important.
     <name>hbase.bucketcache.ioengine</name>
     <value></value>
     <description>Where to store the contents of the bucketcache. One of: heap,
-      offheap, or file. If a file, set it to file:PATH_TO_FILE. See
-      http://hbase.apache.org/book.html#offheap.blockcache for more information.
+    offheap, or file. If a file, set it to file:PATH_TO_FILE. See
+    http://hbase.apache.org/book.html#offheap.blockcache for more information.
     </description>
   </property>
   <property>
     <name>hbase.bucketcache.combinedcache.enabled</name>
     <value>true</value>
     <description>Whether or not the bucketcache is used in league with the LRU
-      on-heap block cache. In this mode, indices and blooms are kept in the LRU
-      blockcache and the data blocks are kept in the bucketcache.</description>
+    on-heap block cache. In this mode, indices and blooms are kept in the LRU
+    blockcache and the data blocks are kept in the bucketcache.</description>
   </property>
   <property>
     <name>hbase.bucketcache.size</name>
-    <value>65536</value>
-    <description>The size of the buckets for the bucketcache if you only use a single
size.
-      Defaults to the default blocksize, which is 64 * 1024.</description>
+    <value></value>
+    <description>A float that EITHER represents a percentage of total heap memory
+    size to give to the cache (if &lt; 1.0) OR, it is the total capacity in
+    megabytes of BucketCache. Default: 0.0</description>
   </property>
   <property>
     <name>hbase.bucketcache.sizes</name>
     <value></value>
-    <description>A comma-separated list of sizes for buckets for the bucketcache
-      if you use multiple sizes. Should be a list of block sizes in order from smallest
-      to largest. The sizes you use will depend on your data access patterns.</description>
+    <description>A comma-separated list of sizes for buckets for the bucketcache.
+    Can be multiple sizes. List block sizes in order from smallest to largest.
+    The sizes you use will depend on your data access patterns.
+    Must be a multiple of 1024 else you will run into
+    'java.io.IOException: Invalid HFile block magic' when you go to read from cache.
+    If you specify no values here, then you pick up the default bucketsizes set
+    in code (See BucketAllocator#DEFAULT_BUCKET_SIZES). 
+  </description>
   </property>
   <property>
       <name>hfile.format.version</name>
@@ -907,7 +913,7 @@ possible configurations would overwhelm and obscure the important.
       <name>hbase.rs.cacheblocksonwrite</name>
       <value>false</value>
       <description>Whether an HFile block should be added to the block cache when the
-          block is finished.</description>
+        block is finished.</description>
   </property>
   <property>
     <name>hbase.rpc.timeout</name>


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