hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Colin Patrick McCabe (Assigned) (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-2872) Add sanity checks during edits loading that generation stamps are non-decreasing
Date Thu, 23 Feb 2012 19:26:48 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe reassigned HDFS-2872:
------------------------------------------

    Assignee: Colin Patrick McCabe
    
> Add sanity checks during edits loading that generation stamps are non-decreasing
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-2872
>                 URL: https://issues.apache.org/jira/browse/HDFS-2872
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 1.0.0
>            Reporter: Todd Lipcon
>            Assignee: Colin Patrick McCabe
>
> In 0.23 and later versions, we have a txid per edit, and the loading process verifies
that there are no gaps. Lacking this in 1.0, we can use generation stamps as a proxy - the
OP_SET_GENERATION_STAMP opcode should never result in a decreased genstamp. If it does, that
would indicate that the edits are corrupt, or older edits are being applied to a newer checkpoint,
for example.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message