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Review request for hbase.
Summary
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Patch that parallelizes the splitting of the files using ThreadPoolExecutor and
Futures. The code is a bit ugly, but does the job really well as shown during
cluster testing (which also uncovered HBASE-3318).
One new behavior this patch adds is that it's now possible to rollback a split
because it took too long to split the files. I did some testing with a timeout
of 5 secs on my cluster, even tho each machine did a few rollbacks the import
went fine. The default is 30 seconds and isn't in hbase-default.xml as I don't
think anyone would really want to change that.
This addresses bug HBASE-3308.
http://issues.apache.org/jira/browse/HBASE-3308
Diffs
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/branches/0.90/src/main/java/org/apache/hadoop/hbase/regionserver/SplitTransaction.java
1043188
Diff: http://review.cloudera.org/r/1273/diff
Testing
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Thanks,
Jean-Daniel
