How redis achieves synchronization with the database

Synchronize database to Redis

Most of us tend to use this method, which is to synchronize changes in the database to Redis , this is more reliable. Redis is just caching here.

Option 1 (Recommended learning: Redis video tutorial)

When doing caching, you must follow the semantic regulations of caching:

Read: Read cache redis, no, read mysql, and write the mysql value to redis.

Write: Write mysql. After success, update or invalidate the value in cached redis.

For those with high consistency requirements, read from the database, such as financial, transaction and other data. Others are read from Redis.

The advantage of this solution is that mysql, a conventional relational database, ensures persistence, consistency, etc., and is less error-prone.

Option 2

You can also use mysql_udf_redis based on binlog to synchronize the data in the database to Redis.

But obviously, this increases the overall complexity, and functions that we could easily complete in the system code now need to rely on third-party tools. Moreover, the entire boundary of the system has expanded, becoming more unstable and difficult to manage.

For more Redis-related technical articles, please visit the Redis Getting Started Tutorial column to learn!

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