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Date: Sun, 27 Aug 2017 01:22:02 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
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Message-ID: <JIRA.12923435.1450707470000.130288.1503796922434@Atlassian.JIRA>
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Subject: [jira] [Commented] (ZOOKEEPER-2349) Update documentation for
 snapCount
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archived-at: Sun, 27 Aug 2017 01:22:11 -0000


    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16142980#comment-16142980 ] 

Hadoop QA commented on ZOOKEEPER-2349:
--------------------------------------

+1 overall.  GitHub Pull Request  Build
      

    +1 @author.  The patch does not contain any @author tags.

    +0 tests included.  The patch appears to be a documentation patch that doesn't require tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 3.0.1) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/978//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/978//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/978//console

This message is automatically generated.

> Update documentation for snapCount
> ----------------------------------
>
>                 Key: ZOOKEEPER-2349
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2349
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: documentation
>            Reporter: Raghavendra Prabhu
>            Priority: Minor
>         Attachments: ZOOKEEPER-2349.patch
>
>
> The documentation states that 
> {code}
> ZooKeeper logs transactions to a transaction
> log. After snapCount transactions are written to a log
> file a snapshot is started and a new transaction log
> file is created. The default snapCount is
> 100,000.
> {code}
> However, in implementation, snapshotting is done when logCount is somwhere in (snapCount/2, snapCount+1], based on the limit set at runtime:  
> {code}
>         if (logCount > (snapCount / 2 + randRoll)) {
> {code}
> as in 
> https://github.com/apache/zookeeper/blob/trunk/src/java/main/org/apache/zookeeper/server/SyncRequestProcessor.java#L124


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