Decommissioning a data center
Properly removing a data center ensures that no information is lost.
- Make sure no clients are still writing to any nodes in the data center.
Run a full repair with nodetool
This ensures that all data is propagated from the data center being decommissioned.
- Change all keyspaces so they no longer reference the data center being removed.
- Run nodetool decommission on every node in the data center being removed.