[
https://issues.apache.org/jira/browse/MAPREDUCE-2267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ramkumar Vadali updated MAPREDUCE-2267:
---------------------------------------
Attachment: MAPREDUCE-2267.patch
> Parallelize reading of blocks within a stripe
> ---------------------------------------------
>
> Key: MAPREDUCE-2267
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2267
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/raid
> Affects Versions: 0.22.0
> Reporter: Ramkumar Vadali
> Assignee: Ramkumar Vadali
> Attachments: MAPREDUCE-2267.patch
>
>
> RAID code has several instances where several blocks of data have to be read
> to perform an operation. For example, computing a parity block requires
> reading the blocks of the source file. Similarly, generating a fixed block
> requires reading a parity block and the good blocks from the source file.
> These read operations proceed sequentially currently. RAID code should use a
> thread pool to increase the parallelism and thus reduce latency.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
