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HBASE-15351 Fix description of hbase.bucketcache.size in hbase-default.xml

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stack 2016-02-26 13:49:26 -08:00
parent 3c660e2a0f
commit 8f6e29785a
1 changed files with 17 additions and 11 deletions
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28
hbase-common/src/main/resources/hbase-default.xml
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@ -857,29 +857,35 @@ possible configurations would overwhelm and obscure the important.
<name>hbase.bucketcache.ioengine</name> <name>hbase.bucketcache.ioengine</name>
<value></value> <value></value>
<description>Where to store the contents of the bucketcache. One of: heap, <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 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. http://hbase.apache.org/book.html#offheap.blockcache for more information.
</description> </description>
</property> </property>
<property> <property>
<name>hbase.bucketcache.combinedcache.enabled</name> <name>hbase.bucketcache.combinedcache.enabled</name>
<value>true</value> <value>true</value>
<description>Whether or not the bucketcache is used in league with the LRU <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 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> blockcache and the data blocks are kept in the bucketcache.</description>
</property> </property>
<property> <property>
<name>hbase.bucketcache.size</name> <name>hbase.bucketcache.size</name>
<value>65536</value> <value></value>
<description>The size of the buckets for the bucketcache if you only use a single size. <description>A float that EITHER represents a percentage of total heap memory
Defaults to the default blocksize, which is 64 * 1024.</description> 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>
<property> <property>
<name>hbase.bucketcache.sizes</name> <name>hbase.bucketcache.sizes</name>
<value></value> <value></value>
<description>A comma-separated list of sizes for buckets for the bucketcache <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 Can be multiple sizes. List block sizes in order from smallest to largest.
to largest. The sizes you use will depend on your data access patterns.</description> 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>
<property> <property>
<name>hfile.format.version</name> <name>hfile.format.version</name>
@ -907,7 +913,7 @@ possible configurations would overwhelm and obscure the important.
<name>hbase.rs.cacheblocksonwrite</name> <name>hbase.rs.cacheblocksonwrite</name>
<value>false</value> <value>false</value>
<description>Whether an HFile block should be added to the block cache when the <description>Whether an HFile block should be added to the block cache when the
block is finished.</description> block is finished.</description>
</property> </property>
<property> <property>
<name>hbase.rpc.timeout</name> <name>hbase.rpc.timeout</name>