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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12655) WALPerformanceEvaluation miscalculates append/sync statistics for multiple regions
Date Tue, 09 Dec 2014 17:15:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14239670#comment-14239670
] 

Hudson commented on HBASE-12655:
--------------------------------

FAILURE: Integrated in HBase-TRUNK #5893 (See [https://builds.apache.org/job/HBase-TRUNK/5893/])
HBASE-12655 WALPerformanceEvaluation should only add stat gathering listener once per WAL.
(busbey: rev 33d79bb5eca16edc61a81c87676f866613c06ce8)
* hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestDefaultWALProvider.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WAL.java


> WALPerformanceEvaluation miscalculates append/sync statistics for multiple regions
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-12655
>                 URL: https://issues.apache.org/jira/browse/HBASE-12655
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.99.2
>            Reporter: Sean Busbey
>            Assignee: Sean Busbey
>            Priority: Minor
>             Fix For: 1.0.0, 2.0.0
>
>         Attachments: HBASE-12655.1.patch.txt
>
>
> Right now the WALPerformaceEvaluation tool sets up each new region by asking for a WAL
and then adding a listener. The listener updates running stats on appends / syncs using a
shared object in the evaluation tool.
> For WALProviders that reuse WALs (such as the default one always using a single WAL),
this results in adding a listener to WALs that already have them. Each of those listeners
is then updated on each append/sync.



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