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From "Michael Han (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (ZOOKEEPER-2349) Update documentation for snapCount
Date Mon, 11 Sep 2017 20:47:00 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-2349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Han reassigned ZOOKEEPER-2349:
--------------------------------------

    Assignee: maoling

> 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
>            Assignee: maoling
>            Priority: Minor
>             Fix For: 3.5.4, 3.6.0, 3.4.11
>
>         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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