* Sharding only within own team (coordinator is singleton)
* the ddata Replicator used by Sharding must also be only within own team
* added support for Set of roles in ddata Replicator so that can be used
by sharding to specify role + team
* Sharding proxy can route to sharding in another team
* one Replicator per configured role
* log LMDB directory at startup
* clarify the imporantce of the LMDB directory
* use more than one key to support many entities
* In the logs of the failing test we can see that the first node is removed
as expected and then come back in the membership, which is possible in
case of conflicting membership state merge. It is supposed to be
removed again by the auto-down. That doesn't happen within the barrier-timeout.
* Provide shorter aliases for the ActorRefProviders #20649
* Use the new actorefprovider aliases throughout code and docs
* Cleaner alias replacement logic
For manual downing it is not needed. For auto-down it doesn't add any extra safety, since that
is not handling network partitions anyway.
The setting is still useful if you implement downing strategies that handle network partitions,
e.g. by keeping the larger side of the partition and shutting down the smaller side.
Two improvements to the coordinator startup (state recovery) that
should make it operational faster and reduce the amount of lost messages
during startup.
* Let the quick (those not involving failure detection) Terminated messages
be processed before starting to reply to GetShardHome.
* Consider regions that don't belong to the current cluster
to be terminated.
* avoid using Down and Exiting member from being used for joining
* delay shut down of Down member until the information is spread
to all reachable members, e.g. downing several nodes via one node
* akka.cluster.down-removal-margin setting
Margin until shards or singletons that belonged to a
downed/removed partition are created in surviving partition.
Used by singleton and sharding.
* remove the retry count parameters/settings for singleton in
favor of deriving those from the removal-margin
