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Django redis backend

Project description

Warning

This module is not maintained anymore. Please use http://pypi.python.org/pypi/django-redisdb

Goal

Provide Redis backends for Django that faciliates using multiple Redis servers in the same time like if they were in master/master or sharded configuration.

Installation

Install requirements:

pip install redis hash_ring

Install Kido Redis:

pip install django-kidoredis

or current development version:

pip install hg+https:://bitbucket.org/kidosoft/django-kidoredis

Configuration

CACHES = {
    'redis_ring': {
        'BACKEND': 'kidoredis.backends.RedisRing',  # sharding backend
        'DB': 0,
        'LOCATION': [
            'localhost:6379',
            'localhost:6380',
        ]
    },
    'redis_copy': {
        'BACKEND': 'kidoredis.backends.RedisCopy',  # copying backend
        'DB': 0,
        'LOCATION': [
            'localhost:6379',
            'localhost:6380',
        ]
    }
}

Redis is configured as cache backend although it should be treat as specialized database. There are two backends:

Usage

After configuration access to Redis is done like to any other Django cache:

from django.core.cache import caches
caches['redis_ring'].set('key1', 1)  # set key1 only on on server
caches['redis_copy'].set('key2', 2)  # set key2 on all servers
result_list = caches['redis_copy'].zrange('key3', 1, 10)  # redis only command

Caveats

RedisCopy can save data to many nodes. Each of this nodes can return different result on save. For that reason commands that save data to nodes returns list of results from each node. E.g. with two nodes set for redis_copy:

>>> print caches['redis_copy'].set('key1', 2)
[True, True]

Supported Django versions

Tested with:

  • Django 1.2.7 on python2.7
  • Django 1.3.7 on python2.7
  • Django 1.4.16 on python2.7
  • Django 1.5.11 on python2.7, python3.4
  • Django 1.6.8 on python2.7, python3.4
  • Django 1.7.1 on python2.7, python3.4

Project details


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