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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2013/05/03 21:42:17 UTC

[jira] [Updated] (HBASE-4324) Single unassigned directory is very slow when there are many unassigned nodes

     [ 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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