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Posted to hdfs-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2013/08/09 23:20:48 UTC

[jira] [Updated] (HDFS-5029) Token operations should not block read operations

     [ https://issues.apache.org/jira/browse/HDFS-5029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daryn Sharp updated HDFS-5029:
------------------------------

    Attachment: HDFS-5029.patch

Resubmitting patch since failures do not appear to be related - I cannot reproduce them.
                
> Token operations should not block read operations
> -------------------------------------------------
>
>                 Key: HDFS-5029
>                 URL: https://issues.apache.org/jira/browse/HDFS-5029
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-5029.branch-23.patch, HDFS-5029.patch, HDFS-5029.patch
>
>
> Token operations unnecessarily obtain the write lock on the namespace.  Edits for token operations are independent of edits for other namespace write operations, and the edits have no ordering requirement with respect to namespace changes.

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