Shulou(Shulou.com)05/31 Report--

This article mainly introduces "the working principle of Redis master-slave copy breakpoint continuation". In daily operation, I believe many people have doubts about the working principle of Redis master-slave copy breakpoint continuation. The editor consulted various materials and sorted out simple and easy operation methods. I hope to help you answer the doubts about "the working principle of Redis master-slave copy breakpoint continuation"! Next, please follow the small series to learn together!

The following is a list of the ways in which the data is transmitted:

The primary server side maintains an in-memory backlog for replication streams. Both master and slave servers maintain a replication offset

and master run id.

When the connection is disconnected, the slave server reconnects to the master server and then requests to continue replication, provided that the two master run ids of the master server are the same and the specified master run id is the same.

The offset is still valid in the memory buffer, replication continues from the point where it was last interrupted. If one of these conditions is not met, a full resynchronization takes place

(Prior to version 2.8, full resynchronization was performed directly.)

Because the master run id is not stored on disk, full synchronization is possible only if the slave server is restarted.

For this new feature of partial resynchronization, redis 2.8 internally uses the PSYNC command, whereas older implementations use the SYNC command.

At this point, the study of "Redis master-slave copy breakpoint continuation" is over, hoping to solve everyone's doubts. Theory and practice can better match to help you learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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