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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4797) [availability] Skip recovered.edits files with edits we know older than what region currently has
Date Tue, 22 Nov 2011 01:22:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13154804#comment-13154804

Lars Hofhansl commented on HBASE-4797:

I'm happy to commit this (pending the test run). Any objections?
> [availability] Skip recovered.edits files with edits we know older than what region currently
> -------------------------------------------------------------------------------------------------
>                 Key: HBASE-4797
>                 URL: https://issues.apache.org/jira/browse/HBASE-4797
>             Project: HBase
>          Issue Type: Bug
>          Components: performance
>            Reporter: stack
>            Assignee: Jimmy Xiang
>            Priority: Critical
>              Labels: noob
>             Fix For: 0.94.0
>         Attachments: 0001-HBASE-4797-[availability]-skip-older-edits.patch, 0001-HBASE-4797-[availability]-skip-older-edits.patch
> Testing 0.92, I crashed all servers out.  Another bug makes it so WALs are not getting
cleaned so I had 7000 regions to replay.  The distributed split code did a nice job and cluster
came back but interesting is that some hot regions ended up having loads of recovered.edits
files -- tens if not hundreds -- to replay against the region (can we bulk load recovered.edits
instead of replaying them?).  Each recovered.edits file is taking about a second to process
(though only about 30 odd edits per file it seems).  The region is unavailable during this

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