CODEWITHSUNDEEP
redis
silviomoreto
silviomoreto

Reputation: 5897

How do I change between redis database?

I am new with redis and I didn't figured out how to create and change to another redis database.

How do I do this?

Upvotes: 103

Views: 150313

Answers (3)

Lam.Truong
Lam.Truong

Reputation: 129

redis-cli //connect server firstly 
redis-cli info //show all existing database - at the bottom 
//exit
redis-cli -n 1 //1 is the name of database

Upvotes: 10

yojimbo87
yojimbo87

Reputation: 68443

By default there are 16 databases (indexed from 0 to 15) and you can navigate between them using select command. Number of databases can be changed in redis config file with databases setting.

By default, it selects the database 0. To select a specified one, use redis-cli -n 2 (selects db 2)

Upvotes: 166

Tw Bert
Tw Bert

Reputation: 3809

Note: this is not a direct answer to the OP's question. However, this text is too long for a comment, and I thought I'd share it anyway, to clarify things to the OP. Hope I don't break too many SO rules by doing this...

Some extra info on multiple databases:

Please note that using multiple databases in one redis instance is discouraged.

It is a nice feature for playing around and getting to know redis.

In more serious setups, if you have multiple ports at your disposal, it's preferred and more performant to use separate instances. At our company, we run about 50 instances on the development/staging server, and about 5 on the production server.

The reason is, that redis transactions are only atomic within one db number anyway. Most (if not all) clients nicely seperate that for you in the connect() phase. And if you have to connect separately, it's just as easy to connect to a different port.

The core of redis is also single threaded. That's one of the things that makes redis so quick and simple. Everything is sequential. If you use multiple instances instead of just one, you gain the benefit of multi-processing (on multi-core machines).

Upvotes: 63

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