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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1062) large numbers of threads make in-memory updates slow
Date Wed, 20 Nov 2013 05:41:23 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827366#comment-13827366
] 

ASF subversion and git services commented on ACCUMULO-1062:
-----------------------------------------------------------

Commit ae0be1f60db5b3b2493f5816f4481c1b092ae6bf in branch refs/heads/1.6.0-SNAPSHOT from Eric
C. Newton
[ https://git-wip-us.apache.org/repos/asf?p=accumulo.git;h=ae0be1f ]

ACCUMULO-1062 disabling testParallelWriteSpeed

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1461552 13f79535-47bb-0310-9956-ffa450edef68


> large numbers of threads make in-memory updates slow
> ----------------------------------------------------
>
>                 Key: ACCUMULO-1062
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1062
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.4.2
>         Environment: testing on large clusters
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>            Priority: Critical
>             Fix For: 1.4.3, 1.5.0
>
>         Attachments: SlamTest.java
>
>
> Using hundreds of ingest programs, each running several batch writers, ingest would eventually
become slow.  Testing (attached) proved that performance fell off as the number of threads
increased.



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