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From "Bryan Keller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10076) Backport MapReduce over snapshot files [0.94]
Date Tue, 17 Dec 2013 17:41:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850710#comment-13850710

Bryan Keller commented on HBASE-10076:

In some simple tests, I saw a 4-5x speed improvement, which is similar to what you are seeing.
In production, we saw a lower 3x improvement in our main jobs, but that is because we are
more bound by CPU now than before. I did some quick profiling and it appears there is room
for some optimization in HRegion to reduce CPU usage, which would further improve performance
for more CPU intensive jobs.

> Backport MapReduce over snapshot files [0.94]
> ---------------------------------------------
>                 Key: HBASE-10076
>                 URL: https://issues.apache.org/jira/browse/HBASE-10076
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Jesse Yates
>         Attachments: hbase-10076-v0.patch
> MapReduce over Snapshots would be valuable on 0.94.

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