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Posted to dev@zookeeper.apache.org by "Jacky007 (JIRA)" <ji...@apache.org> on 2013/03/21 15:35:15 UTC

[jira] [Updated] (ZOOKEEPER-1674) There is no need to clear & load the database across leader election

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-1674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacky007 updated ZOOKEEPER-1674:
--------------------------------

    Summary: There is no need to clear & load the database across leader election  (was: There is no need to reload database cross leader election)
    
> There is no need to clear & load the database across leader election
> --------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1674
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1674
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Jacky007
>
> It is interesting to notice the piece of codes in QuorumPeer.java
>  /* ZKDatabase is a top level member of quorumpeer 
>      * which will be used in all the zookeeperservers
>      * instantiated later. Also, it is created once on 
>      * bootup and only thrown away in case of a truncate
>      * message from the leader
>      */
>     private ZKDatabase zkDb;
> It is introduced by ZOOKEEPER-596. Now, we just drop the database every leader election.
> We can keep it safely with ZOOKEEPER-1549.

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