Hi,
I'm still learning about Django's caching features and had a question about
my specific setup. My app uses a Redis-backed cache to store a variety of
different data (including sessions, users, and other stuff).
In *settings.py*, I've defined several caches, as shown below. These all
point to the exact same Redis instance. I've set it up like this because I
really like the ability to set a VERSION for a specific subset of keys. As
the structure of the cached data changes in development, I can invalidate a
whole set of cached keys just by bumping up the VERSION setting. Or at
least that's my idea right now. I'm basically using cache definitions just
to group keys.
Is it okay to do this? On every request, the app hits several of these
"caches". Am I inadvertently opening up multiple connections to the same
Redis instance on every page view? Are there any other downsides to this
kind of setup? Or alternative ways of 'versioning' groups of keys?
Thanks in advance.
- EJ
CACHES = {
'default': {
"VERSION": 1,
"BACKEND": "django_redis.cache.RedisCache",
"LOCATION": "redis://127.0.0.1:6379/0",
"KEY_PREFIX" : "d",
"OPTIONS": {
"CLIENT_CLASS": "django_redis.client.DefaultClient",
}
},
'sessions': {
"VERSION": 1,
"BACKEND": "django_redis.cache.RedisCache",
"LOCATION": "redis://127.0.0.1:6379/0",
"KEY_PREFIX" : "s",
"OPTIONS": {
"CLIENT_CLASS": "django_redis.client.DefaultClient",
}
},
'users': {
"VERSION": 1,
"BACKEND": "django_redis.cache.RedisCache",
"LOCATION": "redis://127.0.0.1:6379/0",
"KEY_PREFIX" : "u",
"OPTIONS": {
"CLIENT_CLASS": "django_redis.client.DefaultClient",
}
},
...
}
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