Group Replication enables you to create fault-tolerant systems with redundancy by replicating the system state to a set of servers. Even if some of the servers subsequently fail, as long it is not all or a majority, the system is still available.…
Category Archives: Replication
Specify Recovery IP Addresses in Group Replication
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 Group Replication – Default response to network partitions has changed
MySQL Group Replication allows you to create an highly-available replication group of servers with minimum effort. It provides automated mechanisms to detect and respond to failures in the members of the group. The response depends on the characteristics of each failure and it is configurable.…
You Can Now Use Binary Log Checksums with Group Replication
Group Replication enables you to create fault-tolerant systems with redundancy by replicating the system state to a set of servers. Even if some of the servers subsequently fail, as long it is not all or a majority, the system is still available.…
MySQL 8.0.21 Replication Enhancements
There is a new MySQL 8.0 release and it has some interesting replication features. The change log is available at the usual place, MySQL 8.0.21, but let me give you a brief summary.
- Binary Log Checksums Support for Group Replication (WL#9038).
MySQL Terminology Updates
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.…
Enforce Primary Key constraints on Replication
In this post, we introduce a configuration option that controls whether replication channels allow the creation of tables without primary keys. This continues our recent work on replication security, where we allowed users to enforce privilege checks, and/or enforce row-based events.…
MySQL 8.0.20 Replication Enhancements
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
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).…
Restrict MySQL replication to row based events
In a follow-up to the work presented on MySQL 8.0.18 where we introduced privilege checks for slave applier threads, in this post we present a new feature to further increase your ability to securely replicate your data: you can now restrict replication streams to row based events only.…