Victor Xu created HBASE-14061:
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Summary: Support CF-level Storage Policy
Key: HBASE-14061
URL: https://issues.apache.org/jira/browse/HBASE-14061
Project: HBase
Issue Type: Improvement
Components: HFile, regionserver
Environment: hadoop-2.6.0
Reporter: Victor Xu
After reading [HBASE-12848|https://issues.apache.org/jira/browse/HBASE-12848]
and [HBASE-12934|https://issues.apache.org/jira/browse/HBASE-12934], I wrote a
patch to implement cf-level storage policy.
My main purpose is to improve random-read performance for some really hot data,
which usually locates in certain column family of a big table.
Usage:
$ hbase shell
> alter 'TABLE_NAME', METADATA => {'hbase.hstore.block.storage.policy' =>
> 'POLICY_NAME'}
> alter 'TABLE_NAME', {NAME=>'CF_NAME', METADATA =>
> {'hbase.hstore.block.storage.policy' => 'POLICY_NAME'}}
HDFS's setStoragePolicy can only take effect when new hfile is created in a
configured directory, so I had to make sub directories(for each cf) in region's
.tmp directory and set storage policy for them.
Besides, I had to upgrade hadoop version to 2.6.0 because dfs.getStoragePolicy
cannot be easily written in reflection, and I needed this api to finish my unit
test.
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