[infinispan-issues] [JBoss JIRA] (ISPN-4002) Allow the reduce phase to store elements into result cache

[Dan Berindei (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-4002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dan Berindei updated ISPN-4002:
-------------------------------

           Status: Resolved  (was: Pull Request Sent)
    Fix Version/s: 7.0.0.Alpha3
                   7.0.0.Final
       Resolution: Done

    
> Allow the reduce phase to store elements into result cache 
> -----------------------------------------------------------
>
>                 Key: ISPN-4002
>                 URL: https://issues.jboss.org/browse/ISPN-4002
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Core, Distributed Execution and Map/Reduce
>            Reporter: Mircea Markus
>            Assignee: Vladimir Blagojevic
>              Labels: 630
>             Fix For: 7.0.0.Alpha3, 7.0.0.Final
>
>
> In the situation in which the result of the Map/Reduce task is large, returning it to the originator does not work, as the originator would run OOM. In order to drop this limitation, would be good to:
> - have a result cache
> - put all the M/R entries into this result cache
> It should be possible to specify this cache to the Map/Reduce task to be executed (cache name), as users might reuse the cache and configure it externally.
>  
> The caller will be notified once the data Map/Reduce is finished. We'd need a way for the user to get all the keys in this cache for further processing.

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