[infinispan-issues] [JBoss JIRA] (ISPN-4093) Inefficient implementation of containsKey in distribute cache for large entries

[Mikolaj Gierulski (JIRA)]

Mikolaj Gierulski created ISPN-4093:
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             Summary: Inefficient implementation of containsKey in distribute cache for large entries
                 Key: ISPN-4093
                 URL: https://issues.jboss.org/browse/ISPN-4093
             Project: Infinispan
          Issue Type: Enhancement
          Components: Core
    Affects Versions: 6.0.0.Final
            Reporter: Mikolaj Gierulski
            Assignee: Dan Berindei
            Priority: Minor


As far as I understand, containsKey on distributed cache performs a GetKeyValueCommand (which may be executed remotedly) and checks if the result was null.
This results in loading the whole entry, which may be expensive when dealing with large entries.
In our system we introduced a KeyExistsTask implementing DistributedCallable, which we submit with distributed execution framework. This task performs cache.containsKey on keys local node avoiding unnecessary transfer of possibly large amount of data.
In our case this brought a significant improvement of containsKey operation.

Best regards,
Mikolaj

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