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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14061) Support CF-level Storage Policy
Date Sat, 07 Jan 2017 20:33:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15808102#comment-15808102

Yu Li commented on HBASE-14061:

Thanks for review [~tedyu] and [~ashish singhi], will commit this soon.

> Support CF-level Storage Policy
> -------------------------------
>                 Key: HBASE-14061
>                 URL: https://issues.apache.org/jira/browse/HBASE-14061
>             Project: HBase
>          Issue Type: Sub-task
>          Components: HFile, regionserver
>         Environment: hadoop-2.6.0
>            Reporter: Victor Xu
>            Assignee: Yu Li
>         Attachments: HBASE-14061-master-v1.patch, HBASE-14061.v2.patch, HBASE-14061.v3.patch,
> 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'
> 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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