raft-kv

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A C++ implementation of RAFT consensus algorithm based on asio

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# raft-kv

A C++ implementation of RAFT consensus algorithm based on [asio](https://github.com/boostorg/asio). It provides a key-value store compatible with the [redis protocol](https://redis.io/topics/protocol).

## Getting Started

### Build
    
    git clone https://github.com/jinyyu/raft-kv.git
    mkdir -p raft-kv/build
    cd raft-kv/build
    cmake .. -DCMAKE_BUILD_TYPE=Release
    make -j8
    
### Running a cluster

First install [goreman](https://github.com/mattn/goreman), which manages Procfile-based applications.

goreman start
    
    
### Test

install [redis-cli](https://github.com/antirez/redis), a redis console client.

redis-cli -p 63791
    127.0.0.1:63791> set mykey myvalue
    OK
    127.0.0.1:63791> get mykey
    "myvalue"
    
remove a node and replace the myvalue with "new-value" to check cluster availability:

goreman run stop node2
    redis-cli -p 63791
    127.0.0.1:63791> set mykey new-value
    OK
    
bring the node back up and verify it recovers with the updated value "new-value":

redis-cli -p 63792
    127.0.0.1:63792> KEYS *
    1) "mykey"
    127.0.0.1:63792> get mykey
    "new-value"
    
### benchmark

redis-benchmark -t set,get -n 100000 -p 63791
    
    ====== SET ======
      100000 requests completed in 1.35 seconds
      50 parallel clients
      3 bytes payload
      keep alive: 1
    
    96.64% <= 1 milliseconds
    99.15% <= 2 milliseconds
    99.90% <= 3 milliseconds
    100.00% <= 3 milliseconds
    73909.83 requests per second
    
    ====== GET ======
      100000 requests completed in 0.95 seconds
      50 parallel clients
      3 bytes payload
      keep alive: 1
    
    99.95% <= 4 milliseconds
    100.00% <= 4 milliseconds
    105485.23 requests per second

raft-kv

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