Does Zeebe store its state in RocksDB or any database?

Thank for another great reply.

Btw how do we backup and restore the state then?

Scenarios like we want to move to new cluster etc. if I recall Zeebe does not support increasing the number of broker or partitions once installed in a cluster. So in that cases we need to create a new cluster and then we need to also move old state to the new one. How do you solve such scenarios?