[ https://issues.apache.org/jira/browse/MAPREDUCE-2267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Scott Chen updated MAPREDUCE-2267: ---------------------------------- Hadoop Flags: [Reviewed] Status: Patch Available (was: Open) > 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-2267.1.patch, MAPREDUCE-2267.2.patch, > MAPREDUCE-2267.3.patch, MAPREDUCE-2267.4.patch, 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. - For more information on JIRA, see: http://www.atlassian.com/software/jira