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https://issues.apache.org/jira/browse/MAPREDUCE-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ramkumar Vadali updated MAPREDUCE-2099:
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Status: Patch Available (was: Open)
> RaidNode should recreate outdated parity HARs
> ---------------------------------------------
>
> Key: MAPREDUCE-2099
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2099
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/raid
> Reporter: Ramkumar Vadali
> Assignee: Ramkumar Vadali
> Attachments: MAPREDUCE-2099.patch
>
>
> After parity files are archived into a parity HAR, a change in the source
> file does not cause the HAR to be recreated. Instead, individual parity files
> are created for the modified files but the HAR is not touched. This causes
> increased disk usage for parity data.
> The parity HAR could be recreated if a certain percentage of files in the HAR
> are determined to be outdated.
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