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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3310) Lease recovery for append
Date Mon, 30 Jun 2008 21:56:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-3310:
------------------------------------

    Release Note: Implemented Lease Recovery to sync the last bock of a file.  Added ClientDatanodeProtocol
for client trigging block recovery. Changed DatanodeProtocol to support block synchronization.
Changed InterDatanodeProtocol to support block update.  (was: Implemented Lease Recovery for
synchronized the last bock of a file lease.  We have
- Added ClientDatanodeProtocol for client trigging block recovery
- Changed DatanodeProtocol to support block synchronization
- Changed InterDatanodeProtocol to support block update)
    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

> Lease recovery for append
> -------------------------
>
>                 Key: HADOOP-3310
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3310
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 0.18.0
>
>         Attachments: 3310_20080514.patch, 3310_20080516b.patch, 3310_20080516c.patch,
3310_20080519.patch, 3310_20080519b.patch, 3310_20080520.patch, 3310_20080521.patch, 3310_20080522b.patch,
3310_20080522c.patch, 3310_20080523.patch, 3310_20080524_dhruba.patch, 3310_20080527.patch,
3310_20080528.patch, 3310_20080528b.patch, 3310_20080528c.patch, 3310_20080529.patch, 3310_20080529b.patch,
3310_20080529c.patch
>
>
> In order to support file append, a GenerationStamp is associated with each block.  Lease
recovery will be performed when there is a possibility that the replicas of a block in a lease
may have different GenerationStamp values.
> For more details, see the documentation in HADOOP-1700.

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