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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3859) QJM: implement md5sum verification
Date Fri, 14 Sep 2012 22:54:08 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-3859:
------------------------------

    Attachment: hdfs-3859.txt

Attached patch fills in the md5sum of the file during recovery, and verifies it when the log
is transfered via HTTP.
                
> QJM: implement md5sum verification
> ----------------------------------
>
>                 Key: HDFS-3859
>                 URL: https://issues.apache.org/jira/browse/HDFS-3859
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-3859-sha1.txt, hdfs-3859.txt
>
>
> When the QJM passes journal segments between nodes, it should use an md5sum field to
make sure the data doesn't get corrupted during transit. This also serves as an extra safe-guard
to make sure that the data is consistent across all nodes when finalizing a segment.

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