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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8322) Re-enable hbase checksums by default
Date Thu, 02 May 2013 16:40:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13647679#comment-13647679
] 

Jean-Daniel Cryans commented on HBASE-8322:
-------------------------------------------

The really important thing is that you don't want to access disk, as it will dominate your
benchmark and you can't really control what will come from disk and what won't at the beginning
of the test. That's why all my tests where done only once 100% of the data was in whatever
cache I was using (block cache or OS buffer).
                
> Re-enable hbase checksums by default
> ------------------------------------
>
>                 Key: HBASE-8322
>                 URL: https://issues.apache.org/jira/browse/HBASE-8322
>             Project: HBase
>          Issue Type: Improvement
>          Components: Filesystem Integration
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 0.98.0, 0.95.1
>
>         Attachments: hbase-8322_v1.patch
>
>
> Double checksumming issues in HBase level checksums(HBASE-5074) has been fixed in HBASE-6868.
However, that patch also disables hbase checksums by default. I think we should re-enable
it by default, and document the interaction with shortcircuit reads. 

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