Patrik,
In our system I expect the actors to be created frequently and they'll
be short lived in almost 90% of our use cases. The reason why I wanted
control over the location in which an actor is created, is to minimize the
overhead of passing messages across different machines and keep things
local much as possible. Yes I did read about ShardAllocationStrategy and
was wondering if there was entity level allocation strategy that I could
override.
Thanks,
Karthik
On Monday, December 14, 2015 at 10:13:40 AM UTC-8, Patrik Nordwall wrote:
>
> Heiko is right. If allocation at shard level is good enough for you, it’s
> possible to use a custom ShardAllocationStrategy that cares about the
> requester ActorRef:
>
> * @param requester actor reference to the [[ShardRegion]] that requested the
> location of the
> * shard, can be returned if preference should be given to
> the node where the shard was first accessed
>
> It is possible to use a one-to-one mapping between entity and shard to be
> in full control for each actor, but that is not very scalable and it adds
> additional latency for the first message for each entity.
>
> Cheers,
> Patrik
>
>
> On Mon, Dec 14, 2015 at 7:44 AM, Heiko Seeberger <loe...@posteo.de
> <javascript:>> wrote:
>
>> Allocation happens at the shard level, i.e. for groups of actors, see
>> `ShardCoordinator.ShardAllocationStrategy`. Therefore I don’t think you can
>> achieve what you described.
>>
>> Heiko
>>
>> --
>>
>> *Heiko Seeberger*
>> Home: heikoseeberger.de
>> Twitter: @hseeberger <https://twitter.com/hseeberger>
>> Public key: keybase.io/hseeberger
>>
>> On 14 Dec 2015, at 01:05, Karthik Deivasigamani <kart...@gmail.com
>> <javascript:>> wrote:
>>
>> Hi,
>> I have been using cluster sharding feature in akka 2.4.1. I would like
>> the sharding to be topology aware. For example : if I have a cluster with
>> nodes - n1,n2,n3,n4. If my request goes to node n1 and if the entity actor
>> does not exist in the cluster then it must create the entity actor on node
>> n1 (basically same node where it received the request). Is there a way for
>> me to control this behavior? Any pointers would be immensely helpful.
>>
>> Thanks,
>> Karthik
>>
>> --
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>
>
> --
>
> Patrik Nordwall
> Typesafe <http://typesafe.com/> - Reactive apps on the JVM
> Twitter: @patriknw
>
>
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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