[infinispan-dev] MapReduce on REPL and Mapper behaviour

[Thomas Fromm]

On 10.08.2012 13:36, Mircea Markus wrote:
>
>>
>> 2) In case I do not have an Reduce job, I'd like to avoid provide
>> Reducer. Creating feature request that reducedWith(...) is optional?
>>
> As you don't need a reducer, have you considered using the 
> DistributedExecutorService with a DistributedCallable for that?

I wanted to execute an operation only once on every key, independend how 
many nodes are owner of the entry.
The DistCallable approach was my first solution, where I checked at 
every node for every entry, if the current node is owner, before I 
modified it.
So using the Mapper was a much simpler solution.
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