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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 e0d7e0eb3b
commit 46ffa85982
1 changed files with 35 additions and 1 deletions
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34
hbase-common/src/main/resources/hbase-default.xml
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@ -779,6 +779,40 @@ possible configurations would overwhelm and obscure the important.
index block in a multi-level block index grows to this size, the
block is written out and a new block is started.</description>
</property>
<property>
<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.
</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>
</property>
<property>
<name>hbase.bucketcache.size</name>
<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.
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>
<value>3</value>