Raft logs need to sync to majority peers.

Wait for switching to ASYNC.

Raft logs need to sync between different DCs.

Switching from ASYNC to SYNC mode.

Logs sync to different DCs.

Logs sync to majority peers.

The region's state is unknown.

DR mode.

The standard mode.

The status of dr-autosync mode.

The replication status sync from TiKV to PD.

The replication status sync from PD to TiKV.