akka/akka-core

add a withNumberOfShards to ClusterShardingSettings

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#28,366 opened on Dec 12, 2019

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1 - triagedhelp wantedt:cluster-shardingt:typed

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Description

Requested in https://discuss.lightbend.com/t/different-number-of-shards-per-entity-type/5595

One thing to be aware of is that the compatibility check that is performed when nodes are joining the cluster will not verify such changed property. The setting must be the same on all nodes.

Contributor guide

Research direction
Add a new method `withNumberOfShards` to `ClusterShardingSettings` that allows users to specify the number of shards per entity type. Ensure the compatibility check is updated if needed.
Tech stack
scala
Domain
backenddistributed systems
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
ScalaAkka
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65