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From "Denis Magda (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-3261) AffinityKey is not stored in the metadata cache
Date Mon, 06 Jun 2016 14:38:20 GMT
Denis Magda created IGNITE-3261:

             Summary: AffinityKey is not stored in the metadata cache
                 Key: IGNITE-3261
                 URL: https://issues.apache.org/jira/browse/IGNITE-3261
             Project: Ignite
          Issue Type: Bug
          Components: cache
    Affects Versions: 1.5.0.final
            Reporter: Denis Magda
            Priority: Critical
             Fix For: 1.7
         Attachments: Ignite-MarshallBenchmark.zip

Presently we don't register predefined and system classes in metadata cache which can lead
to significant performance drops when these types used as keys.

As an example we have {{AffinityKey}} class. It's not registered in the metadata cache and
as a result client nodes don't update their {{CacheObjectBinaryProcessorImpl.clientMetaDataCache}}.
After that when a client node needs to get {{AffinityKey}} metadata using {{CacheObjectBinaryProcessorImpl.metadata(typeId)}}
it will always call metadata cache and this is a bottleneck. The drop can be significant because
this method is called from methods like {{GridAffinityProcessor.mapKeyToPrimaryAndBackups}}.

In attach you can find a simple benchmark that shows how slower a result if AffinityKey is

As a solution we can register {{AffinityKey}} and other system and predefined classes (?)
in the metadata cache.

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