db/

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db contains master and node using raft consensus algorithm.

We only need one master to mantain the system status, so the master only for:

Wraps the meta data query: register/get/update raft peers.
Send heartbeats to every known node, remove any of them wich down or network partition.

Every node combines a HTTP server and a Raft instance.
HTTP server handles serveral API:
GET /i/key/:key for get the value of the :key.
POST /key for add a pair of key and value.
POST /join for join a peer into the cluster, reject if current raft instance is not a Leader.
GET /ping for master heartbeat.
GET /stats for stats of current raft instance.

Path	Synopsis
master
node
service Package service provides the HTTP server for accessing the distributed key-value store.	Package service provides the HTTP server for accessing the distributed key-value store.
store Package store provides a simple distributed key-value store.	Package store provides a simple distributed key-value store.