[infinispan-issues] [JBoss JIRA] (ISPN-4692) Optimize externalizer for FileListCacheValue

[Galder Zamarreño (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-4692?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Galder Zamarreño updated ISPN-4692:
-----------------------------------
           Status: Resolved  (was: Pull Request Sent)
    Fix Version/s: 7.0.0.CR1
       Resolution: Done


> Optimize externalizer for FileListCacheValue
> --------------------------------------------
>
>                 Key: ISPN-4692
>                 URL: https://issues.jboss.org/browse/ISPN-4692
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Lucene Directory
>            Reporter: Sanne Grinovero
>            Assignee: Gustavo Fernandes
>             Fix For: 7.0.0.CR1
>
>
> There are two possible improvements to be applied to the Externalizer strategy applied by FileListCacheValue.
> - Each String is being encoded (and decoded) in UTF8 format, which is expensive. We should explore alternative encodings to String - at least for the wire format.
> - This is an ideal case for Delta operations: on each modification just one entry of the map is added / removed, but the whole HashMap is being transferred at each write.
> I'm not sure how we can combine the Delta interface with custom Externalizers, so that will need to be explored.
> We might want to avoid storing it as a value and resort to custom RPC commands to transfer the needed bits only, but we don't want to reimplement state transfer and CacheStore storage.



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