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Date: Fri, 26 Feb 2016 07:51:18 +0000 (UTC)
From: "Liu Shaohui (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-15338) Add a option to disable the data
 block cache for testing the performance of underlying file system
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    [ https://issues.apache.org/jira/browse/HBASE-15338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15168616#comment-15168616 ] 

Liu Shaohui commented on HBASE-15338:
-------------------------------------

[~jingcheng.du@intel.com] [~anoop.hbase]
Agreed with you.
Making cache on read in CacheConfig configurable will works.
Thanks for your suggestions~ I will update the patch later~

> Add a option to disable the data block cache for testing the performance of underlying file system
> --------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-15338
>                 URL: https://issues.apache.org/jira/browse/HBASE-15338
>             Project: HBase
>          Issue Type: Improvement
>          Components: integration tests
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15338-trunk-v1.diff, HBASE-15338-trunk-v2.diff
>
>
> When testing and comparing the performance of different file systems(HDFS, Azure blob storage, AWS S3 and so on) for HBase, it's better to avoid the affect of the HBase BlockCache and get the actually random read latency when data block is read from underlying file system. (Usually, the index block and meta block should be cached in memory in the testing).
> So we add a option in CacheConfig to disable the data block cache.
> Suggestions are welcomed~ Thanks


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