[infinispan-dev] Distributed execution framework

[vblagoje at redhat.com]

On 2010-07-22, at 4:00, Galder Zamarreño <galder at redhat.com> wrote:

> Thanks Vladimir for the detailed article.
> 
> I have some doubts wrt failover: Let's say node N owned keys=a,b,c and a task T was sent to N to work on a,b. Assuming N' was next in hash wheel to N, if N fails, task T would be sent N' since this would be the new owner for a,b, wouldn't it? Note that Infinispan uses fixed positions in hash wheel. I don't think there's a need here to spawn T to all a,b backup nodes. Interaction between Infinispan F/J and rehashing will be important here.

Correct. No need to migrate tasks to all back up nodes! Interaction between FJ and CH is crucial.

> 
> Another thing to consider is what to do if the T fails but not because node N failed, but cos the task itself failed. You can either send the task to a,b backup owners which would N' or consider T as failed directly.

Again correct. Thanks for this insight.

> 
> 
> Infinispan F/J will have to differentiate between these two scenarios.
> 
> On Jul 21, 2010, at 7:42 PM, Vladimir Blagojevic wrote:
> 
>> Hi,
>> 
>> I wanted to gather feedback from community regarding proposed scope and objectives of Distributed execution framework targeted for Infinispan 5.0. The document is a gentle introduction to the subject of distributed execution and as such is accessible to wider audience. Eager to hear your thoughts.  
>> 
>> Regards,
>> Vladimir
>> 
>> https://community.jboss.org/wiki/InfinispanDistributedExecutionFramework
>> 
>> 
>> --
>> Vladimir Blagojevic
>> JBoss Clustering Team
>> JBoss, by Red Hat
>> 
>> 
>> 
>> 
>> 
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> 
> --
> Galder Zamarreño
> Sr. Software Engineer
> Infinispan, JBoss Cache
> 
> 
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