[jira] [Commented] (HBASE-7824) Improve master start up time when there is log split work

["Jeffrey Zhong (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-7824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583869#comment-13583869 ] 

Jeffrey Zhong commented on HBASE-7824:
--------------------------------------

Hey Lars,

Do you want me to put the fix into 0.94.6? After the fix, master starts up will only blocked on meta region servers(including root & meta) recovery. Assuming, a 100 nodes cluster, the meta region servers is only about 2% of all region servers. Therefore, master virtually doesn't wait log splitting work for starting up.

Thanks,
-Jeffrey
 
                
> Improve master start up time when there is log split work
> ---------------------------------------------------------
>
>                 Key: HBASE-7824
>                 URL: https://issues.apache.org/jira/browse/HBASE-7824
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>             Fix For: 0.94.6
>
>
> When there is log split work going on, master start up waits till all log split work completes even though the log split has nothing to do with meta region servers.
> It's a bad behavior considering a master node can run when log split is happening while its start up is blocking by log split work. 
> Since master is kind of single point of failure, we should start it ASAP.

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