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Patrick Kling commented on MAPREDUCE-1752: ------------------------------------------ Mahadev/Nicholas, could one of you please have a look at this patch? ant test-patch results: {code} [exec] +1 overall. [exec] [exec] +1 @author. The patch does not contain any @author tags. [exec] [exec] +1 tests included. The patch appears to include 6 new or modified tests. [exec] [exec] +1 javadoc. The javadoc tool did not generate any warning messages. [exec] [exec] +1 javac. The applied patch does not increase the total number of javac compiler warnings. [exec] [exec] +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings. [exec] [exec] +1 release audit. The applied patch does not increase the total number of release audit warnings. [exec] [exec] +1 system test framework. The patch passed system test framework compile. [exec] {code} > Implement getFileBlockLocations in HarFilesystem > ------------------------------------------------ > > Key: MAPREDUCE-1752 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1752 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: harchive > Reporter: Dmytro Molkov > Assignee: Dmytro Molkov > Fix For: 0.22.0 > > Attachments: MAPREDUCE-1752.2.patch, MAPREDUCE-1752.3.patch, > MR-1752.patch > > > To efficiently run map reduce on the data that has been HAR'ed it will be > great to actually implement getFileBlockLocations for a given filename. > This way the JobTracker will have information about data locality and will > schedule tasks appropriately. > I believe the overhead introduced by doing lookups in the index files can be > smaller than that of copying data over the wire. > Will upload the patch shortly, but would love to get some feedback on this. > And any ideas on how to test it are very welcome. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.