package models

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Chord is the service for inter-node communication. This has all the RPC functions needed to maintain a Chord cluster.

• rpc GetPredecessor (ER, Node)

  chord.proto:10

  GetPredecessor returns the node believed to be the current predecessor.

• rpc GetSuccessor (ER, Node)

  chord.proto:12

  GetSuccessor returns the node believed to be the current successor.

• rpc Notify (Node, ER)

  chord.proto:15

  Notify notifies Chord that Node thinks it is our predecessor. This has the potential to initiate the transferring of keys.

• rpc FindSuccessor (ID, Node)

  chord.proto:18

  FindSuccessor finds the node the succedes ID. May initiate RPC calls to other nodes.

• rpc CheckPredecessor (ID, ER)

  chord.proto:20

  CheckPredecessor checkes whether predecessor has failed.

• rpc SetPredecessor (Node, ER)

  chord.proto:22

  SetPredecessor sets predecessor for a node.

• rpc SetSuccessor (Node, ER)

  chord.proto:24

  SetPredecessor sets predecessor for a node.

• rpc XGet (GetRequest, GetResponse)

  chord.proto:27

  Get returns the value in Chord ring for the given key.

  message GetRequest

  chord.proto:53

  • string key = 1

  message GetResponse

  chord.proto:57

  • bytes value = 1

• rpc XSet (SetRequest, SetResponse)

  chord.proto:29

  Set writes a key value pair to the Chord ring.

  message SetRequest

  chord.proto:61

  • string key = 1

  • string value = 2

  message SetResponse

  chord.proto:66

  (message has no fields)

• rpc XDelete (DeleteRequest, DeleteResponse)

  chord.proto:31

  Delete returns the value in Chord ring for the given key.

  message DeleteRequest

  chord.proto:69

  • string key = 1

• rpc XMultiDelete (MultiDeleteRequest, DeleteResponse)

  chord.proto:33

  Multiple delete returns the value in Chord ring between the given keys.

  message MultiDeleteRequest

  chord.proto:76

  • repeated string keys = 1

• rpc XRequestKeys (RequestKeysRequest, RequestKeysResponse)

  chord.proto:35

  RequestKeys returns the keys between given range from the Chord ring.

  message RequestKeysRequest

  chord.proto:80

  • bytes from = 1

  • bytes to = 2

  message RequestKeysResponse

  chord.proto:90

  • repeated KV values = 1

Used as response type in: Chord.XDelete, Chord.XMultiDelete

(message has no fields)

Used as request type in: Chord.GetPredecessor, Chord.GetSuccessor

Used as response type in: Chord.CheckPredecessor, Chord.Notify, Chord.SetPredecessor, Chord.SetSuccessor

(message has no fields)

Used as request type in: Chord.CheckPredecessor, Chord.FindSuccessor

• bytes id = 1

Used in: RequestKeysResponse

• string key = 1

• string value = 2

Node contains a node ID and address.

Used as request type in: Chord.Notify, Chord.SetPredecessor, Chord.SetSuccessor

Used as response type in: Chord.FindSuccessor, Chord.GetPredecessor, Chord.GetSuccessor

• bytes id = 1

• string addr = 2