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Posted to hdfs-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2013/09/04 22:22:52 UTC

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

    [ https://issues.apache.org/jira/browse/HDFS-5029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13758290#comment-13758290 ] 

Daryn Sharp commented on HDFS-5029:
-----------------------------------

Patch has languished, so I'll need to update after HADOOP-9930.  Notably I won't need to sync on the secret manager since HADOOP-9930 makes the ADTSM async-safe.
                
> 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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