Draft

Draft is a replicated in-memory key-value database using the Raft algorithm (https://raft.github.io/).

Implementation of the Raft algorithm makes the cluster resilient to server failure.

For the database client see: https://github.com/pouriya-zarbafian/draft-client

Development status

This version is a first draft (I'll take myself out), and is not ready for production. Large scale testing will follow to assess the correctness and resilience of the system.

Setup on each node

Configuration file

Create a configuration file and set the correct value for the property me. Currently only IPs are supported.

# Comma separated list of members in the form host:port
members=127.0.0.1:7777,127.0.0.1:8888,127.0.0.1:9999

# This member
me=127.0.0.1:7777

# Election timeout and randomness in milliseconds
election.timeout=500
election.randomness=500

# Maximum inactivity period for leader:
# Should be strictly less than election timeout
max.inactivity=400

# Message handling threads
handler.threads=4

# Logging
log.filename=log/node1.log
log.level=INFO

Set environment variable and start server

git clone https://github.com/pouriya-zarbafian/draft.git
cd draft
export DRAFT_CONFIG=/path/to/config/draft.conf
cargo run