No, the sharded actors do not need to be persistent.
Akka Persistence *is* however needed internally by Cluster Sharding in order to 
be able to cope with recovery / dying of nodes etc.

So:
- you need to configure persistence with a distributed journal, yes
- no, your sharded actors do not have to be persistent.

If you actually don't use multiple nodes and are only testing stuff, a local 
journal is enough.

-- 
Cheers,
Konrad 'ktoso’ Malawski
Akka @ Typesafe

On 2 December 2015 at 04:31:34, Karthik Deivasigamani (karthi...@gmail.com) 
wrote:

Konrad,
    Does cluster sharding feature require the actors to be persistent actors? I 
looked at the typesafe examples for cluster sharding - 
http://www.typesafe.com/activator/template/akka-cluster-sharding-scala and they 
are all based on Persistent actors. I'm trying to use cluster sharding with 
Actors that are not persistent and ran into some issues. So wanted to know if 
non-persistent actors are supported.
Thanks,
Karthik

On Saturday, November 28, 2015 at 3:47:22 AM UTC-8, Konrad Malawski wrote:
You should read up on cluster sharding:
http://doc.akka.io/docs/akka/current/scala/cluster-sharding.html

Such "to the same Actor, given an identifier" is exactly what it is designed 
for.

-- 
Cheers,
Konrad 'ktoso’ Malawski
Akka @ Typesafe

On 28 November 2015 at 11:59:52, Karthik Deivasigamani (kart...@gmail.com) 
wrote:

We have a system where we require all requests pertaining to a given user-id be 
processed in order and by the same actor. For example : if we get requests for 
userid - u1,u2,u3,u1,u4,u5,u5 in that order then the requests for user-id u1 
must always go to the same actor so that they can processed in the order they 
were receive. What's the best way to accomplish this in scala-akka? Any 
examples?
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