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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3277) fail over to loading a different FSImage if the first one we try to load is corrupt
Date Fri, 01 Mar 2013 03:51:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HDFS-3277:
------------------------------

    Status: Patch Available  (was: Open)
    
> fail over to loading a different FSImage if the first one we try to load is corrupt
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-3277
>                 URL: https://issues.apache.org/jira/browse/HDFS-3277
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Andrew Wang
>         Attachments: HDFS-3277.002.patch, HDFS-3277.003.patch, HDFS-3277.004.patch
>
>
> Most users store multiple copies of the FSImage in order to prevent catastrophic data
loss if a hard disk fails.  However, our image loading code is currently not set up to start
reading another FSImage if loading the first one does not succeed.  We should add this capability.
> We should also be sure to remove the FSImage directory that failed from the list of FSImage
directories to write to, in the way we normally do when a write (as opopsed to read) fails.

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