Cluster placement patterns

How do I make an actor that:

Is unique for a given ID

Use a virtual actor with the ID as part of its name.

Use-case: e.g. Players, monsters, user accounts .

Is a cluster singleton

Use a virtual actor with a known name.

Use-case: e.g. a manager actor of some sort, that manages work for the entire cluster.

Always exist on each member

Use a normal actor, boot on startup. Use MemberList to see what members exist when communicating with these actors.

Use-case: e.g. a worker actor that performs maintenance work for each cluster member.