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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8322) Re-enable hbase checksums by default
Date Fri, 03 May 2013 18:12:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13648634#comment-13648634
] 

Enis Soztutar commented on HBASE-8322:
--------------------------------------

Thanks J-M for the offer. I was running from OS cache, because the size of the data is just
1GB, and I prewarm the OS cache by repeating the test a couple of times before the actual
measurements. The sure way of ensuring this can also be to mount hadoop on ramfs. 
                
> 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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