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From "Zhihong Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6058) Use ZK 3.4 API 'multi' in bulk assignment
Date Sat, 19 May 2012 14:48:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279559#comment-13279559
] 

Zhihong Yu commented on HBASE-6058:
-----------------------------------

There hasn't been consensus as to which HBase version would require zk 3.4 as the minimum
supported version.
                
> Use ZK 3.4 API 'multi' in bulk assignment
> -----------------------------------------
>
>                 Key: HBASE-6058
>                 URL: https://issues.apache.org/jira/browse/HBASE-6058
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, zookeeper
>    Affects Versions: 0.96.0
>            Reporter: nkeywal
>            Assignee: nkeywal
>            Priority: Minor
>
> We use async API today. This is already much much faster than the sync API. Still, it
makes sense to use the 'multi' function: this will decrease the network & zookeeper load
at startup/rolling restart.
> On a 500 nodes cluster, we see 3 that 3 seconds are spent on updating ZK per bulk assignment.
This should cut it in half (+ the benefits on the network/zk load).

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