CACHES = {
'default': {
    'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
    'LOCATION': '/var/tmp/django_cache',
    }
}

MIDDLEWARE_CLASSES = (
    'django.middleware.cache.UpdateCacheMiddleware',
    ....
    'django.middleware.cache.FetchFromCacheMiddleware',
)