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

[Tristan Tarrant (Jira)]

     [ https://issues.jboss.org/browse/ISPN-4093?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tristan Tarrant reassigned ISPN-4093:
-------------------------------------

    Assignee: Dan Berindei


> 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
>              Labels: contains, dist
>
> 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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