Redis 6 多线程和多个Redis数据库

Question

I'm trying to get more familiar with Redis, and I found that the Redis 6 release notes say the following:

Redis 6 rings in a new era: while it retains a core single-threaded data-access interface, I/O is now threaded.

This multithreading seems particularly useful for writes, as mentioned in the redis.conf

Multiple databases in Redis has been discussed several times, like at StackOverflow and Redis DB google group . The StackOverflow answer says the following:

It is deprecated and, as you noted, multiple instances lets you take advantage of multiple cores.

Because the Redis 6 release notes say "a core single-threaded data-access interface" is retained - does this mean multiple instances of Redis will still take better advantage of multiple cores for data accessing than multiple Redis databases on a single Redis instance will?

Does retaining "a core single-threaded data-access interface" mean that all data-access commands (like GET, SET), regardless of which database in the redis instances, will have to go through this interface (rather than multiple data-access interfaces if we used multiple Redis instances instead) ?

Thanks!

Answer 1

Because the Redis 6 release notes say "a core single-threaded data-access interface" is retained - does this mean multiple instances of Redis will still take better advantage of multiple cores for data accessing than multiple Redis databases on a single Redis instance will?

Yes, multiple instances of Redis will probably have have better utilization of a multi-core server.

Does retaining "a core single-threaded data-access interface" mean that all data-access commands (like GET, SET), regardless of which database in the redis instances, will have to go through this interface (rather than multiple data-access interfaces if we used multiple Redis instances instead) ?

Yes, Redis 6 maintains this property.