java - 用了redis还需要MySQL或者Oracle之类的数据库吗

Question

如题 像一些大并发访问的如新浪微博应用了redis 我想知道数据都存储在redis里面吗 还有没有用非nosql数据库来存储数据

Answer 1

Redis is generally used for caching. If you need persistent storage, you will definitely need a database like mysql

Answer 2

Depends on the scenario, redis seems to be able to persist, although I don’t know if it can have the reliability of a relational database
Complex logic must be uploaded to the database

Answer 3

Must be required. nosql is not suitable for all development scenarios.
And the persistence of redis is not absolutely perfect

Answer 4

http://blog.jobbole.com/83459/
I recommend reading this!

Answer 5

To compare whether it can be replaced, we need to find out three important points:
1. There are still problems with Redis data persistence.
2. Strict transaction ACID is not supported
3. Complex condition queries are not supported.

Answer 6

Front-end reads data from redis
Backend operations use mysql
Backend mysql synchronizes to redis
Front-end redis data queue to mysql

Answer 7

Required.

In the production environment, redis is mostly used for cache or queue, and data storage still needs to be placed in a relational database such as mysql

Answer 8

That’s necessary

Answer 9

Redis is a cache, and the cache is not a place for persistence. The database is

Answer 10

Persistence is necessary