b48938f4a0
* Improve default shard rebalancing algorithm, #26012 * Use rebalance-threshold=1 because it will give the best distribution, and previous default could result in too large difference between nodes * Off by one error, difference > threshold vs >= * Added more unit tests * Note that in some cases it may still not be optimal, stopping more shards than necessary, but a different strategy that looks at more than most and least is out of scope for this issue. In practise those cases shouldn't matter much. * Also note that the rebalance interval is by default 10 seconds, so typically shards will start up before next rebalance tick. It's intentionally a slow process to not cause instabilities by moving too much at the same time. |
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Akka 
We believe that writing correct concurrent & distributed, resilient and elastic applications is too hard. Most of the time it's because we are using the wrong tools and the wrong level of abstraction.
Akka is here to change that.
Using the Actor Model we raise the abstraction level and provide a better platform to build correct concurrent and scalable applications. This model is a perfect match for the principles laid out in the Reactive Manifesto.
For resilience, we adopt the "Let it crash" model which the telecom industry has used with great success to build applications that self-heal and systems that never stop.
Actors also provide the abstraction for transparent distribution and the basis for truly scalable and fault-tolerant applications.
Learn more at akka.io.
Reference Documentation
The reference documentation is available at doc.akka.io, for Scala and Java.
Community
You can join these groups and chats to discuss and ask Akka related questions:
- Forums: discuss.akka.io
- Chat room about using Akka:
- Issue tracker:
In addition to that, you may enjoy following:
- The news section of the page, which is updated whenever a new version is released
- The Akka Team Blog
- @akkateam on Twitter
- Questions tagged #akka on StackOverflow
- Projects built with Akka:
Contributing
Contributions are very welcome!
If you see an issue that you'd like to see fixed, the best way to make it happen is to help out by submitting a pull request implementing it.
Refer to the CONTRIBUTING.md file for more details about the workflow, and general hints on how to prepare your pull request. You can also ask for clarifications or guidance in GitHub issues directly, or in the akka/dev chat if a more real time communication would be of benefit.
A chat room is available for all questions related to developing and contributing to Akka:
License
Akka is Open Source and available under the Apache 2 License.