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https://issues.apache.org/jira/browse/IGNITE-8846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16519565#comment-16519565
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ASF GitHub Bot commented on IGNITE-8846:
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GitHub user ascherbakoff opened a pull request:
https://github.com/apache/ignite/pull/4241
IGNITE-8846 Optimize entry transform operations.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gridgain/apache-ignite ignite-8846
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/4241.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 #4241
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commit cf12c78b4f87469d0f7c2a234b9e1f4dc34c10f4
Author: Aleksei Scherbakov <alexey.scherbakoff@...>
Date: 2018-06-21T16:34:40Z
IGNITE-8846 Optimize entry transform operations.
----
> Optimize entry transform operations.
> ------------------------------------
>
> Key: IGNITE-8846
> URL: https://issues.apache.org/jira/browse/IGNITE-8846
> Project: Ignite
> Issue Type: Improvement
> Affects Versions: 2.5
> Reporter: Alexei Scherbakov
> Assignee: Alexei Scherbakov
> Priority: Major
> Fix For: 2.6
>
>
> 1. For pessimistic transactions entryProcessor is invoked twice if tx entry
> is already exists in [1]
> and after lock acquistion in [2]
> Actually this is enough to do it only once in postLockWrite.
> 2. Cache entry value is not needed on near node if EntryProcessor declares
> Void return type.
> We should try to detect this in runtime or provide some kind of annotation to
> mark EntryProcessor not caring about return value. This will bring huge
> performance benefit for transactions updating large values using
> transformations.
> [1]
> org.apache.ignite.internal.processors.cache.distributed.near.GridNearTxLocal#enlistWriteEntry
> [2]
> org.apache.ignite.internal.processors.cache.transactions.IgniteTxLocalAdapter#postLockWrite
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