package raft_serverpb

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Used as response type in: tinykvpb.TinyKv.Raft, tinykvpb.TinyKv.Snapshot

(message has no fields)

Snapshot sending and reciveing related messages. Not included in the course scope.

Used in: RaftSnapshotData

• bytes key = 1

• bytes value = 2

Normal indicates that this Peer is normal; Tombstone shows that this Peer has been removed from Region and cannot join in Raft Group.

Used in: RegionLocalState

• Normal = 0

• Tombstone = 2

Used to store the persistent state for Raft state machine.

• uint64 applied_index = 1

  Record the applied index of the state machine to make sure not apply any index twice after restart.

• optional RaftTruncatedState truncated_state = 2

  Record the index and term of the last raft log that have been truncated. (Used in 2C)

Used to store the persistent state for Raft, including the hard state for raft and the last index of the raft log.

• optional eraftpb.HardState hard_state = 1

• uint64 last_index = 2

• uint64 last_term = 3

The message sent between Raft peer, it wraps the raft meessage with some meta information.

Used as request type in: tinykvpb.TinyKv.Raft

Used as field type in: SnapshotChunk

• uint64 region_id = 1

• optional metapb.Peer from_peer = 2

• optional metapb.Peer to_peer = 3

• optional eraftpb.Message message = 4

• optional metapb.RegionEpoch region_epoch = 5

• bool is_tombstone = 6

  true means to_peer is a tombstone peer and it should remove itself.

• bytes start_key = 7

  Region key range [start_key, end_key). (Used in 3B)

• bytes end_key = 8

• optional metapb.Region region = 1

• uint64 file_size = 2

• repeated KeyValue data = 3

• optional SnapshotMeta meta = 5

The truncated state for Raft log compaction.

Used in: RaftApplyState

• uint64 index = 1

• uint64 term = 2

Used to store Region information and the corresponding Peer state on this Store.

• PeerState state = 1

• optional metapb.Region region = 2

Used in: SnapshotMeta

• string cf = 1

• uint64 size = 2

• uint32 checksum = 3

Used as request type in: tinykvpb.TinyKv.Snapshot

• optional RaftMessage message = 1

• bytes data = 2

Used in: RaftSnapshotData

• repeated SnapshotCFFile cf_files = 1

The persistent identification for Store. It used to recover the store id after restart.

• uint64 cluster_id = 1

• uint64 store_id = 2