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Posted to hdfs-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org> on 2012/06/15 23:52:42 UTC

[jira] [Created] (HDFS-3540) Further improvement on recovery mode and edit log toleration in branch-1

Tsz Wo (Nicholas), SZE created HDFS-3540:
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             Summary: Further improvement on recovery mode and edit log toleration in branch-1
                 Key: HDFS-3540
                 URL: https://issues.apache.org/jira/browse/HDFS-3540
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 1.2.0
            Reporter: Tsz Wo (Nicholas), SZE
            Assignee: Tsz Wo (Nicholas), SZE


*Recovery Mode*: HDFS-3479 backported HDFS-3335 to branch-1.  However, the recovery mode feature in branch-1 is dramatically different from the recovery mode in trunk since the edit log implementations in these two branch are different.  For example, there is UNCHECKED_REGION_LENGTH in branch-1 but not in trunk.

*Edit Log Toleration*: HDFS-3521 added this feature to branch-1 to remedy UNCHECKED_REGION_LENGTH and to tolerate edit log corruption.

There are overlaps between these two features.  We study potential further improvement in this issue.

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[jira] [Resolved] (HDFS-3540) Further improvement on recovery mode and edit log toleration in branch-1

Posted by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HDFS-3540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo (Nicholas), SZE resolved HDFS-3540.
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       Resolution: Fixed
    Fix Version/s: 1.2.0
     Hadoop Flags: Reviewed

I have committed this.
                
> Further improvement on recovery mode and edit log toleration in branch-1
> ------------------------------------------------------------------------
>
>                 Key: HDFS-3540
>                 URL: https://issues.apache.org/jira/browse/HDFS-3540
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 1.2.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 1.2.0
>
>         Attachments: h3540_20120925.patch, h3540_20120926.patch, h3540_20120927.patch, h3540_20121009.patch, HDFS-3540-b1.004.patch
>
>
> *Recovery Mode*: HDFS-3479 backported HDFS-3335 to branch-1.  However, the recovery mode feature in branch-1 is dramatically different from the recovery mode in trunk since the edit log implementations in these two branch are different.  For example, there is UNCHECKED_REGION_LENGTH in branch-1 but not in trunk.
> *Edit Log Toleration*: HDFS-3521 added this feature to branch-1 to remedy UNCHECKED_REGION_LENGTH and to tolerate edit log corruption.
> There are overlaps between these two features.  We study potential further improvement in this issue.

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