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From "Ivan Kelly (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2018) Move all journal stream management code into one place
Date Mon, 20 Jun 2011 19:26:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ivan Kelly updated HDFS-2018:

    Attachment: HDFS-2018.diff

Another rough patch, which I'll clean up tomorrow. In this patch, multiple journal streams
can be used in loading. PreTransaction stuff is confined solely to FSImage, JournalManagers
never know about it. Also file and image loading are completely separate now.

> Move all journal stream management code into one place
> ------------------------------------------------------
>                 Key: HDFS-2018
>                 URL: https://issues.apache.org/jira/browse/HDFS-2018
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ivan Kelly
>            Assignee: Ivan Kelly
>             Fix For: Edit log branch (HDFS-1073)
>         Attachments: HDFS-2018.diff, HDFS-2018.diff, HDFS-2018.diff
> Currently in the HDFS-1073 branch, the code for creating output streams is in FileJournalManager
and the code for input streams is in the inspectors. This change does a number of things.
>   - Input and Output streams are now created by the JournalManager.
>   - FSImageStorageInspectors now deals with URIs when referring to edit logs
>   - Recovery of inprogress logs is performed by counting the number of transactions instead
of looking at the length of the file.
> The patch for this applies on top of the HDFS-1073 branch + HDFS-2003 patch.

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