GitHub user milleruntime opened a pull request:
https://github.com/apache/accumulo/pull/241
Discussion of Adam's ACCUMULO-3079: iterator stack collapsing to improve
performance
Applied the changes from the patch submitted by Adam Fuchs on
[ACCUMULO-3079](https://issues.apache.org/jira/browse/ACCUMULO-3079) to master.
This PR is to bring these changes back into discussion.
Questions for discussion: Do we want all/some of these changes? Should we
leave WrappingIterator alone? Could some of these changes be more widely used
across the other iterators/filters?
I also included the performance tests (MikeTest) I used to measure the
improvements; testStack was Adam's from JIRA ticket and testScan1 was one I
wrote to use the new RFile interface. The improvements don't seem to be as
drastic as Adam saw against 1.6 but I was able to consistently measure a 15%
increase in the average number of scans per second.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/milleruntime/accumulo ACCUMULO-3079-all
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/accumulo/pull/241.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #241
----
commit ef3e7dae2ffea2278a665423dd93d09e3cc83638
Author: Mike Miller <[email protected]>
Date: 2017-03-31T16:43:45Z
ACCUMULO-3079: collapsed the iterator stack to improve performance
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