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Posted to hdfs-issues@hadoop.apache.org by "Vinayakumar B (JIRA)" <ji...@apache.org> on 2016/02/01 08:52:40 UTC

[jira] [Updated] (HDFS-9566) Remove expensive 'BlocksMap#getStorages(Block b, final DatanodeStorage.State state)' method

     [ https://issues.apache.org/jira/browse/HDFS-9566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinayakumar B updated HDFS-9566:
--------------------------------
    Summary: Remove expensive 'BlocksMap#getStorages(Block b, final DatanodeStorage.State state)' method  (was: Remove expensive getStorages method)

> Remove expensive 'BlocksMap#getStorages(Block b, final DatanodeStorage.State state)' method
> -------------------------------------------------------------------------------------------
>
>                 Key: HDFS-9566
>                 URL: https://issues.apache.org/jira/browse/HDFS-9566
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 3.0.0, 2.8.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-9566.branch-2.patch, HDFS-9566.patch
>
>
> HDFS-5318 added a {{BlocksMap#getStorages(Block, State)}} which is based on iterables and predicates.  The method is very expensive compared to a simple comparison/continue.



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