Push-Pull Gossip

[dhruve ashar]

Hi,

Based on the documentation available at http://doc.akka.io/docs/akka/snapshot/common/cluster.html , it says that the current gossip is a push-pull optimized by sending a digest instead of actual values.

GOSSIP PROTOCOL

A variation of push-pull gossip is used to reduce the amount of gossip information sent around the cluster. In push-pull gossip a digest is sent representing current versions but not actual values; the recipient of the gossip can then send back any values for which it has newer versions and also request values for which it has outdated versions. Akka uses a single shared state with a vector clock for versioning, so the variant of push-pull gossip used in Akka makes use of this version to only push the actual state as needed.

 

But on github, the related issue is still open.

https://github.com/akka/akka/issues/12107

 https://github.com/akka/akka/issues/16019

Is this already implemented (if yes in which version) or still an open issue? 

Thanks,

Dhruve

[Patrik Nordwall]

Push-pull protocol is implemented but it is not sending deltas. I have closed #12107 and the delta improvement is tracked in #16019.

Thanks,

Patrik

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