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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15082) Fix merge of MVCC and SequenceID performance regression
Date Mon, 11 Jan 2016 19:27:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15092530#comment-15092530
] 

Andrew Purtell commented on HBASE-15082:
----------------------------------------

{quote}
br.  But this is a big change, so I'd say 1.3 is better.
Fine. Could have a 1.3 that comes quickly after 1.2. Means 1.2 has slow increment/append.
Would have to write this up in known issues.
{quote}

A relatively quick 1.3 after 1.2 would work. Other current releases already have the slow
increment/append so it's not making the situation worse relative to other releases in 1.2
to hold off. How about a quick 1.3 that is 1.2, this fix, other fixes about ready to go in,
and the Spark stuff? Can get that all out soon.

> Fix merge of MVCC and SequenceID performance regression
> -------------------------------------------------------
>
>                 Key: HBASE-15082
>                 URL: https://issues.apache.org/jira/browse/HBASE-15082
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: 15082.patch, 15082v2.patch, 15082v2.txt, 15082v3.txt, 15082v4.patch,
15082v5.patch, 15082v6.patch, 15082v7.patch
>
>
> This is general fix for increments (appends, checkAnd*) perf-regression identified in
the parent issue. HBASE-15031 has a narrow fix for branch-1.1 and branch-1.0.



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