pekko/docs/src/main/paradox/cluster-dc.md

Classic Multi-DC Cluster

This chapter describes how @refPekko Cluster can be used across multiple data centers, availability zones or regions.

For the full documentation of this feature and for new projects see @ref:Multi-DC Cluster.

Membership

You can retrieve information about what data center a member belongs to:

Scala

@@snip ClusterDocSpec.scala { #dcAccess }

Java

@@snip ClusterDocTest.java { #dcAccess }

For the full documentation of this feature and for new projects see @ref:Multi-DC Cluster.

Cluster Singleton

This is how to create a singleton proxy for a specific data center:

Scala

@@snip ClusterSingletonManagerSpec.scala { #create-singleton-proxy-dc }

Java

@@snip ClusterSingletonManagerTest.java { #create-singleton-proxy-dc }

If using the own data center as the withDataCenter parameter that would be a proxy for the singleton in the own data center, which is also the default if withDataCenter is not given.

For the full documentation of this feature and for new projects see @ref:Multi-DC Cluster.

Cluster Sharding

This is how to create a sharding proxy for a specific data center:

Scala

@@snip ClusterShardingSpec.scala { #proxy-dc }

Java

@@snip ClusterShardingTest.java { #proxy-dc }

For the full documentation of this feature and for new projects see @ref:Multi-DC Cluster.