Shulou(Shulou.com)06/01 Report--

Primary and primary replication in passive mode

It means that two servers have the same status, but one of them is read-only, and only one server is written in the business.

Method, add read-only=1 to the configuration of one of them:

Benefit: if the server for writing fails, it can quickly switch to the slave server.

Or for maintenance and other purposes, it is more convenient to switch the write function to another server.

There are many master replicas of slave servers in practical applications.

Ring structure ()

That is, three servers, each of which forms a master/slave relationship with its front / back server.

The downside: any server is broken, affecting the other 2. Not as stable as the master replication formed by 2 sets.

In practical use, it is not much.

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