Namespaces vs Databases

[Florian Weber]

Hi!

In what kinda situation is it recommended to use a different databases
instead
of different namespaces ("users:1234:following", "some_stats:
1312558126:something")?

Thanks

[Marc Gravell]

I can't speak for "best practice" etc, but here at Stack Exchange we use a different db (via select) for each different *site*. This gives us a simpler management metaphor than having a different **server** per site, but the data is actually isolated. Another scenario would be similar to when using a different DB in a RDBMS : when the data simply doesn't relate.

In particular, in this scenario we want to retain the ability to excise or relocate all data from one system (a db), without having to do a "KEYS" operation. Having a site-related prefix for that a: wouldn't make that possible (or efficient), and b: would make all the keys bigger.

Marc

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Regards,

Marc

[Carlos Mendes]

I've read that multiple databases support could be removed in future versions of Redis and that it won't be supported with Redis Clustering:

I hope to kill the feature at some point in the future. Maybe for

Redis 3.0, but I'm not sure.
Redis Cluster does not support multiple databases.

Salvatore

Could anyone confirm the current plans for this feature?

[Marc Gravell]

This thread is a similar discussion a little while ago:

http://groups.google.com/group/redis-db/browse_thread/thread/4c3d80c7b056b3ef/fb2516fd7c76fca5?lnk=gst&q=reconsidering#fb2516fd7c76fca5

Short version - it looks promising it will be retained, but not on clustered.

Marc

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[Carlos Mendes]

Thks Marc