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From "Todd Lipcon (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-1975) HA: Support for sharing the namenode state from active to standby.
Date Wed, 30 Nov 2011 21:47:40 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon resolved HDFS-1975.
-------------------------------

       Resolution: Fixed
    Fix Version/s: HA branch (HDFS-1623)
     Hadoop Flags: Reviewed

Committed to HA branch. Thanks Jitendra and Aaron for the original revs of the patch, and
Eli for reviewing.
                
> HA: Support for sharing the namenode state from active to standby.
> ------------------------------------------------------------------
>
>                 Key: HDFS-1975
>                 URL: https://issues.apache.org/jira/browse/HDFS-1975
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>            Reporter: Suresh Srinivas
>            Assignee: Jitendra Nath Pandey
>             Fix For: HA branch (HDFS-1623)
>
>         Attachments: HDFS-1975-HA.2.patch, HDFS-1975-HA.patch, HDFS-1975-HDFS-1623.patch,
HDFS-1975-HDFS-1623.patch, HDFS-1975-HDFS-1623.patch, HDFS-1975-HDFS-1623.patch, hdfs-1975.txt,
hdfs-1975.txt
>
>
> To enable hot standby namenode, the standby node must have current information for -
namenode state (image + edits) and block location information. This jira addresses keeping
the namenode state current in the standby node. To do this, the proposed solution in this
jira is to use a shared storage to store the namenode state. 
> Note one could also build an alternative solution by augmenting the backup node. A seperate
jira could explore this.

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