Category Archives: Replication

MySQL 8.0.22 Replication Enhancements

High Availability, Replication,

MySQL 8.0.22 was released roughly a week ago. It includes some nice additions to replication that we would like to call out. Here they are:

  • Automatic Asynchronous Replication Connection Failover (WL#12649). This work, by Hemant Dangi, implements a mechanism in asynchronous replication that makes the replica automatically try to re-establish an asynchronous replication connection to another replication source, in case the current connection gets interrupted;
  • New terminology for replica related statements (WL#14171).
…

Specify Recovery IP Addresses in Group Replication

Group Replication, High Availability, ,

Group Replication distributed recovery is one of the key features and until now it was restricted to be executed over one mysql connection point automatically defined on mysql system variables port and host.

With group_replication_recovery_endpoints we can specify through which interfaces can group replication recovery take place for a given member so that it controls where recovery traffic flows in the network infrastructure.…

MySQL Terminology Updates

MySQL, Replication

It’s been 20 years since MySQL Replication was introduced in MySQL 3.23.15 (Released in May 2000). Since then, virtually every MySQL Database deployment in production has been using Replication in order to achieve high availability, disaster recovery, read scale out and various other purposes.…

MySQL 8.0.20 Replication Enhancements

Binary Log, High Availability, MySQL, MySQL Replication, Performance, Replication, Security

We have just released MySQL 8.0.20. And it has some interesting replication enhancements. In particular one big and exciting feature: binary log compression. Here is the list of things in this release:

  • Binary Log Compression (WL#3549). This work done by Luís Soares implements binary log compression, making use of the popular compression algorithm ZSTD.
…

Preserving commit order on replicas with binary log disabled

High Availability, MySQL Replication

MySQL 8.0.19 introduces Binlogless replicas with commit ordering which means you can deploy asynchronous replicas without binary logs enabled, and commit transactions in the same order they are replicated in. Yes, you can disable binlog (skip-log-bin) and the logging of changes done by the applier (log-slave-updates=FALSE) while at the same preserve commit order (slave-preserve-commit-order=TRUE).…