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Hadoop QA commented on HBASE-8369: ---------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12590321/HBASE-8369-0.94_v2.patch against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 5 new or modified tests. {color:red}-1 patch{color}. The patch command could not apply the patch. Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/6180//console This message is automatically generated. > MapReduce over snapshot files > ----------------------------- > > Key: HBASE-8369 > URL: https://issues.apache.org/jira/browse/HBASE-8369 > Project: HBase > Issue Type: New Feature > Components: mapreduce, snapshots > Reporter: Enis Soztutar > Assignee: Enis Soztutar > Fix For: 0.98.0, 0.95.2 > > Attachments: HBASE-8369-0.94.patch, HBASE-8369-0.94_v2.patch, > hbase-8369_v0.patch > > > The idea is to add an InputFormat, which can run the mapreduce job over > snapshot files directly bypassing hbase server layer. The IF is similar in > usage to TableInputFormat, taking a Scan object from the user, but instead of > running from an online table, it runs from a table snapshot. We do one split > per region in the snapshot, and open an HRegion inside the RecordReader. A > RegionScanner is used internally for doing the scan without any HRegionServer > bits. > Users have been asking and searching for ways to run MR jobs by reading > directly from hfiles, so this allows new use cases if reading from stale data > is ok: > - Take snapshots periodically, and run MR jobs only on snapshots. > - Export snapshots to remote hdfs cluster, run the MR jobs at that cluster > without HBase cluster. > - (Future use case) Combine snapshot data with online hbase data: Scan from > yesterday's snapshot, but read today's data from online hbase cluster. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira