Cluster sharding on a single node cluster. Does it make sense?

[Amir Karimi]

Hi,

With the kind help of the community I came to the conclusion that I can use cluster sharding to manage resources better and the cluster sharding module is already implemented in Akka.

But I just need the sharding feature of the module, not clustering. Actually a single node is enough for now and probably for the foreseeable future.

Is it OK to run a single node cluster and just use its sharding mechanism? If yes, what is the best practices for configuration and tests.

Regards,
Amir

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Amir Karimi
amirkarimi.github.io

[Konrad Malawski]

I wouldn't see it as a bad thing to use sharding locally to achieve the "lazily create actors for me" semantics that it implements.

You're right that it's designed for a more powerful context - i.e. it is *cluster* sharding, to shard the load across a number of nodes,

but hey - who says you won't need more nodes eventually, and then you don't really need to change your infra, sharding could just use more nodes then.

Happy hakking!

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Cheers,

Konrad 'ktoso' Malawski

Akka @ Typesafe

[Justin du coeur]

Following this up with an in-practice comment: while I plan to get to proper clustering quite soon, I've been running a single-node "cluster" with heavy use of Cluster Sharding in production for months now.  Works great...

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[Amir Karimi]

Thank you everybody,

As I didn't find any help about single node cluster sharding integration tests, I published my test environment code. Please let me know if I did anything wrong.

Regards,
Amir

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Amir Karimi
(+98) 912 211 9506

amirkarimi.github.io

[Patrik Nordwall]

On Thu, Sep 3, 2015 at 8:38 PM, Amir Karimi <a.kar...@gmail.com> wrote:

Thank you everybody,

As I didn't find any help about single node cluster sharding integration tests, I published my test environment code. Please let me know if I did anything wrong.

Looks good, thanks for sharing.

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Patrik Nordwall
Typesafe -  Reactive apps on the JVM
Twitter: @patriknw