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Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2008/05/01 00:56:55 UTC
[jira] Updated: (HADOOP-2656) Support for upgrading existing
cluster to facilitate appends to HDFS files
[ https://issues.apache.org/jira/browse/HADOOP-2656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur updated HADOOP-2656:
-------------------------------------
Attachment: upgradeGenStamp10.patch
Merged patch with latest trunk. The latest trunk does not have BlockCrcUpgrade any more.
> Support for upgrading existing cluster to facilitate appends to HDFS files
> --------------------------------------------------------------------------
>
> Key: HADOOP-2656
> URL: https://issues.apache.org/jira/browse/HADOOP-2656
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.18.0
>
> Attachments: upgradeGenStamp.patch, upgradeGenStamp10.patch, upgradeGenStamp4.patch, upgradeGenStamp5.patch, upgradeGenStamp6.patch, upgradeGenStamp7.patch, upgradeGenStamp8.patch, upgradeGenStamp9.patch, upgradeGenStamp9.patch
>
>
> HADOOP-1700 describes the design for supporting appends to HDFS files. This design requires a distributed-upgrade to existing cluster installations. The design specifies that the DataNode persist the 8-byte BlockGenerationStamp in the block metadata file. The upgrade code will introduce this new field in the block metadata file and initialize this value to 0.
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