django-infinite-memcached

A Django memcached backend to handle "infinite" timeouts (i.e., never expire an item).

Installation

1. $ pip install django-infinite-memcached

2. Set infinite_memcached.cache.MemcachedCache as your cache backend:

   CACHES = {
       "default": {
           "BACKEND": "infinite_memcached.cache.MemcachedCache",
           "LOCATION": "127.0.0.1:11211",
       },
   }
   

How to use

Either set the TIMEOUT option to 0:

CACHES = {
    "default": {
        "BACKEND": "infinite_memcached.cache.MemcachedCache",
        "LOCATION": "127.0.0.1:11211",
        "TIMEOUT": 0,
    },
}

Or pass timeout=0 to the low-level cache commands (e.g., set, add, etc.) to keep things from expiring.

Why?

Django's default memcached backend doesn't accept timeout values of zero, instead using the default timeout (five minutes) when zero is passed.

This cache backend overrides how timeouts are calculated so any timeout of zero is passed directly to memcached, telling memcached to never expire an item.

This has been an known issue for awhile, but concerns over backwards compatibility have prevented any fixes from taking place.

Tests

The README in test_project/ has instructions on running the test suite.

License

BSD. See LICENSE.txt.