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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1892) [performance] make hbase splits run faster
Date Wed, 31 Mar 2010 16:39:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851943#action_12851943

Jonathan Gray commented on HBASE-1892:

Related to stack's comment, we should be doing what they do in bigtable.  Notes about this
in HBASE-2375 as well.

Rather than:  Decide to split, block updates, perform flush.

We should:  Decide to split, perform flush, block updates, perform flush.

In the former, we have to block while writing what could be a very large memstore.  In the
latter, we flush and then block.  The final flush would only have to flush data that was written
during the first flush which should be significantly less data in almost all cases.

> [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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