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https://issues.apache.org/jira/browse/HBASE-12040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14151101#comment-14151101
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Jean-Marc Spaggiari commented on HBASE-12040:
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Ok. Stop spending to much time on that.
I retried few branches last night and figured that at some point, the
SequentialWrite because mapred by default and was --nomapred before.
However, in mapred mode it failed because it looks for the build jars to be in
HDFS but is stacktrace is lost into the gigantic log file where I just search
for the "Finished" lines...
So sound like some FilteredScanTest are running against an empty table while
some other are running against a full table.
I will update the SequentialWrite part of the script and update my numbers for
the 10 last releases (At least up to where this mapred default value changed) I
have tested, update the numbers and report back here. I changed the priority as
I have good suspucions that it's coming from here and should not be a blocker
anymore...
If that's the case, I'm very sorry about that!
> Performances issues with FilteredScanTest
> ------------------------------------------
>
> Key: HBASE-12040
> URL: https://issues.apache.org/jira/browse/HBASE-12040
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.99.1
> Reporter: Jean-Marc Spaggiari
> Assignee: stack
> Priority: Critical
> Fix For: 0.98.7, 0.99.1
>
> Attachments: at-HBASE-11331.html, pre-HBASE-11331.html
>
>
> While testing 0.99.0RC1 release performances, compared to 0.98.6, figured
> that:
> - FilteredScanTest is 100 times slower;
> - RandomReadTest is 1.5 times slower;
> - RandomSeekScanTest is 3.2 times slower;
> - RandomScanWithRange10Test is 1,2 times slower;
> - RandomScanWithRange100Test is 1,3 times slower;
> - RandomScanWithRange1000Test is 4 times slower;
> - SequentialReadTest is 1,7 times slower;
> - SequentialWriteTest is just a bit faster;
> - RandomWriteTest is just a bit faster;
> - GaussianRandomReadBenchmark is just a beat slower;
> - SequentialReadBenchmark is 1,1 times slower;
> - SequentialWriteBenchmark is 1,1 times slower;
> - UniformRandomReadBenchmark crashed;
> - UniformRandomSmallScan is 1,3 times slower.
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