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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2212) Refactor double-buffering code out of JournalManagers
Date Thu, 28 Jul 2011 00:11:09 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072115#comment-13072115
] 

Todd Lipcon commented on HDFS-2212:
-----------------------------------

btw, I should note that this doesn't work with the BackupNode, but the BN is broken in trunk
as is -- since it doesn't handle checksummed edits correctly. This is addressed in 1073 which
is merging any day now.

> Refactor double-buffering code out of JournalManagers
> -----------------------------------------------------
>
>                 Key: HDFS-2212
>                 URL: https://issues.apache.org/jira/browse/HDFS-2212
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.23.0
>
>         Attachments: hdfs-2212.txt
>
>
> This is a small cleanup that makes EditLogFileOutputStream and EditLogBackupOutputStream
more consistent with each other on how they buffer edits. It simply refactors the double-buffering
behavior into a new class.

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