Redis Master Slave

Redis master-slave client for Ruby.

Writes are directed to a master Redis server, while reads are distributed round-robin across any number of slaves.

Usage

require 'redis_master_slave'

client = RedisMasterSlave.new(YAML.load_file('redis.yml'))

client.set('a', 1)         # writes to master
client.get('a')            # reads from slaves, round-robin
client.master.get('a')     # reads directly from master
client.slaves[0].get('a')  # reads directly from first slave

Configuration

The client can be configured in several ways.

Single configuration hash

Ideal for configuration via YAML file.

client = RedisMasterSlave.new(YAML.load_file('redis.yml'))

Example YAML file:

master:
  host: localhost
  port: 6379
slaves:
  - host: localhost
    port: 6380
  - host: localhost
    port: 6381

URL strings

Specify the host and port for each Redis server as a URL string:

master_url = "redis://localhost:6379"
slave_urls = [
  "redis://localhost:6380",
  "redis://localhost:6381",
]
client = RedisMasterSlave.new(master_urls, slave_urls)

Separate master and slave configurations

Specify master and slave configurations as separate hashes:

master_config = {:host => 'localhost', :port => 6379}
slave_configs = []
  {:host => 'localhost', :port => 6380},
  {:host => 'localhost', :port => 6381},
]
client = RedisMasterSlave.new(master_config, slave_configs)

Each configuration hash is passed directly to Redis.new.

Redis client objects

You can also pass your own Redis client objects:

master = Redis.new(:host => 'localhost', :port => 6379)
slave1 = Redis.new(:host => 'localhost', :port => 6380)
slave2 = Redis.new(:host => 'localhost', :port => 6381)
client = RedisMasterSlave.new(master, [slave1, slave2])

Contributing

• Bug reports.
• Source.
• Patches: Fork on Github, send pull request.
  • Please include tests where practical.
  • Leave the version alone, or bump it in a separate commit.

Copyright

Copyright (c) George Ogata. See LICENSE for details.