Add add or update.

Clear clear.

Remove remove.

Reset reset.

BatchSplitRequest batch split requests.

CompactLogRequest compact raft log.

CompactLogResponse compact raft log.

ConfigChangeResponse change peer response.

Request request.

RequestBatch we can't include both normal requests and administrator request at same time.

RequestHeader raft request header, it contains the shard's metadata.

Response response.

ResponseBatch response batch.

TransferLeaderRequest transfer leader.

AdminCmdType admin cmd type.

UpdatePolicy update policy.