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https://issues.apache.org/jira/browse/HDFS-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781766#action_12781766
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Rodrigo Schmidt commented on HDFS-684:
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The code would be simpler if we had one HAR file for every policy, but I
definitely understand your point in having one file per directory. I'm working
on it.
> Use HAR filesystem to merge parity files
> -----------------------------------------
>
> Key: HDFS-684
> URL: https://issues.apache.org/jira/browse/HDFS-684
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: contrib/raid
> Reporter: dhruba borthakur
> Assignee: Rodrigo Schmidt
>
> The HDFS raid implementation (HDFS-503) creates a parity file for every file
> that is RAIDed. This puts additional burden on the memory requirements of the
> namenode. It will be nice if the parity files are combined together using
> the HadoopArchive (har) format.
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