Redis: 2.2.13

Would like the ability to see how many databases are currently being used. I know I can get this from INFO but just being able to query and get an integer of how many DBs are being used would be nice. Sort of like LLEN you can query the number of items in a list.

Another command be good to know which databases are being used as well, since it is possible to use DB0 and DB5

The database concept in Redis is more or less deprecated. Usage of databases is discouraged. I doubt any new command related to databases will be added at this stage, especially if INFO can be used instead.

Regards, Didier.

I don't have an opinion on adding this feature, but I believe a recent thread on the mailing list indicated that databases are not going to be deprecated for the single-server case. Have things changed recently?

It would be nice to know if the databases are going to be deprecated. I like the idea of DB because I can run better statistics on my data because I can separate different types of data I am storing. I do think the database number in config is odd and didn't understand it at first. Maybe you need that, I don't know.

Dudes, databases are not going to be deprecated even if I in the past stated that they would be. The reason is, it is now clear that there are too many apps depending on this feature, and I'm now sure that multi DB is not the only feature it is going to be NOT supported by Redis Cluster.

So the single node exposes the full API, and Redis Cluster will expose a subset of the API, that will not include operations against multiple keys, multiple DBs, and so forth. From this point of view multiple DBs are not worth deprecating.

About the feature requested here, I feel like now that INFO can be queried into different sections, and is thus much faster (only on unstable for now), it is not worth exporting this new command.

After all a simpler way to get this effect is to pipeline the following:

MULTI SELECT 0 DBSIZE SELECT 1 DBSIZE SELECT 2 DBSIZE .... EXEC

Too easy to accomplish client side, and too peculiar.

Salvatore