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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4324) Single unassigned directory is very slow when there are many unassigned nodes
Date Fri, 03 May 2013 19:42:17 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-4324:
-------------------------

    Fix Version/s:     (was: 0.95.1)

Not being worked on...Moving out.
                
> Single unassigned directory is very slow when there are many unassigned nodes
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-4324
>                 URL: https://issues.apache.org/jira/browse/HBASE-4324
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>    Affects Versions: 0.90.4
>            Reporter: Todd Lipcon
>
> Because we use a single znode for /unassigned, and we re-list it every time its contents
change, assignment speed per region is O(number of unassigned regions) rather than O(1). Every
time something changes about one unassigned region, the master has to re-list the entire contents
of the directory inside of AssignmentManager.nodeChildrenChanged().

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