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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13529) Procedure v2 - WAL Improvements
Date Wed, 22 Apr 2015 23:07:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14508109#comment-14508109
] 

Hadoop QA commented on HBASE-13529:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12727327/HBASE-13529-v2.patch
  against master branch at commit afd7a8f4742ddbc575b45fc141a75551b55c56f5.
  ATTACHMENT ID: 12727327

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the total number of
protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13780//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13780//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13780//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13780//console

This message is automatically generated.

> Procedure v2 - WAL Improvements
> -------------------------------
>
>                 Key: HBASE-13529
>                 URL: https://issues.apache.org/jira/browse/HBASE-13529
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2
>    Affects Versions: 2.0.0, 1.1.0
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>            Priority: Blocker
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-13529-v0.patch, HBASE-13529-v1.patch, HBASE-13529-v2.patch,
ProcedureStoreTest.java
>
>
> from the discussion in HBASE-12439 the wal was resulting slow.
>  * there is an error around the awake of the slotCond.await(), causing more wait then
necessary
>  * ArrayBlockingQueue is dog slow, replace it with ConcurrentLinkedQueue
>  * roll the wal only if reaches a threshold (conf ops) to amortize the cost
>  * hsync() is used by default, when the normal wal is using just hflush() make it tunable
via conf



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