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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1071) savenamespace should write the fsimage to all configured fs.name.dir in parallel
Date Tue, 05 Jul 2011 22:28:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt Foley updated HDFS-1071:
-----------------------------

    Issue Type: Sub-task  (was: Improvement)
        Parent: HDFS-2126

> savenamespace should write the fsimage to all configured fs.name.dir in parallel
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-1071
>                 URL: https://issues.apache.org/jira/browse/HDFS-1071
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>            Reporter: dhruba borthakur
>            Assignee: Dmytro Molkov
>             Fix For: 0.22.0
>
>         Attachments: HDFS-1071.2.patch, HDFS-1071.3.patch, HDFS-1071.4.patch, HDFS-1071.5.patch,
HDFS-1071.6.patch, HDFS-1071.7.patch, HDFS-1071.patch
>
>
> If you have a large number of files in HDFS, the fsimage file is very big. When the namenode
restarts, it writes a copy of the fsimage to all directories configured in fs.name.dir. This
takes a long time, especially if there are many directories in fs.name.dir. Make the NN write
the fsimage to all these directories in parallel.

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