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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1892) [performance] make hbase splits run faster
Date Mon, 22 Feb 2010 21:02:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12836903#action_12836903
] 

stack commented on HBASE-1892:
------------------------------

One hump that is in the way of faster splitting is that we do a flush while the close flag
is up.  On a loaded hdfs just now, I saw that this flush took 10 seconds to write out an hfile
of 40M which ain't the worst but during this ten seconds, the close flag on the region was
up and so any one trying to write this region -- and probably read was barred access and probably
off wandering in the wilderness looking for where the region now resides.

> [performance] make hbase splits run faster
> ------------------------------------------
>
>                 Key: HBASE-1892
>                 URL: https://issues.apache.org/jira/browse/HBASE-1892
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>             Fix For: 0.21.0
>
>         Attachments: HBASE-1892.patch
>
>
> hbase-1506 tried and failed making splits faster in 0.20 context.  This issue is about
doing it in 0.21 where we'll have to tools to do.

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