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https://issues.apache.org/jira/browse/IGNITE-3018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965727#comment-15965727
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ASF GitHub Bot commented on IGNITE-3018:
----------------------------------------
GitHub user tledkov-gridgain opened a pull request:
https://github.com/apache/ignite/pull/1779
IGNITE-3018 Cache affinity calculation is slow with large nodes number
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gridgain/apache-ignite ignite-3018
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/1779.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 #1779
----
commit ed35a9eb6f02771c5996209a1e19a4b0557309b6
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-02-27T09:49:31Z
IGNITE-3018: RendezvousAffinityFunction performance tuning
commit 3a6d17c2250158b54e3573af23b9b1534c3c8e92
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-02-27T10:57:36Z
IGNITE-3018: fix review issues
commit db5512b65ce273d955ecd1c2381ade84491895ad
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-03-02T14:32:04Z
Merge branch 'ignite-2.0' into ignite-3018
commit 163c05b6cea25aec0ca3b4ae4552338ed683631f
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-04-12T12:18:14Z
Merge branch '_master' into ignite-3018
# Conflicts:
#
modules/core/src/main/java/org/apache/ignite/cache/affinity/rendezvous/RendezvousAffinityFunction.java
commit 3695d960597a5fdbebf43bf9a3bb57f85f4f394b
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-04-12T12:18:57Z
IGNITE-3018: special assignment calculation for replicated cache
commit 9dfed00ba8be7676dc427f329fb9f557f71d4d21
Author: tledkov-gridgain <tled...@gridgain.com>
Date: 2017-04-12T12:21:37Z
IGNITE-3018: exchange fix
----
> Cache affinity calculation is slow with large nodes number
> ----------------------------------------------------------
>
> Key: IGNITE-3018
> URL: https://issues.apache.org/jira/browse/IGNITE-3018
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Reporter: Semen Boikov
> Assignee: Yakov Zhdanov
> Labels: important
> Fix For: 2.0
>
> Attachments: 003.png, 004.png, 008.png, 016.png, 064.png, 100.png,
> 128.png, 200.png, 256.png, 400.png, 600.png, balanced.003.png,
> balanced.004.png, balanced.008.png, balanced.016.png, balanced.064.png,
> balanced.100.png, balanced.128.png, balanced.200.png, balanced.256.png,
> balanced.400.png, balanced.600.png
>
>
> With large number of cache server nodes (> 200) RendezvousAffinityFunction
> and FairAffinityFunction work pretty slow .
> For RendezvousAffinityFunction.assignPartitions can take hundredes of
> milliseconds, for FairAffinityFunction it can take seconds.
> For RendezvousAffinityFunction most time is spent in MD5 hash calculation and
> nodes list sorting. As optimization we can try to cache {partion, node} MD5
> hash or try another hash function. Also several minor optimizations are
> possible (avoid unncecessary allocations, only one thread local 'get', etc).
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