Great news! MySQL 8.0.3 is out and it is a release candidate. In the replication team we have been busy working on interesting new enhancements and also doing some clean up. Some of these new features are out in this release.…
Category Archives: Replication
Heads Up: The List of Replication Defaults That Have Changed in 8.0.2
In development milestone release (DMR) version 8.0.2 we are changing several replication options. The motivation behind this is simply that we want our users to enjoy default installations with the best efficient setup, configuration and performance. We also don’t want users to struggle getting them to work optimally.…
Group Replication: Prioritise member for the Primary Member Election
In initial Group Replication release, 5.7.17, we included the Single-Primary Mode with automatic membership and fail-over features. The MySQL Server 8.0.2 release has brought further enhancement to Group Replication Single-Primary Mode that will allow users to influence primary member election using integer member weight value.…
Group Replication – Extending Group Replication performance_schema tables
In MySQL 8.0.2, users will see the additional columns in the existing Group Replication Performance Schema tables which will provide extended information about Group Replication. Now user can view role and MySQL version of each member of the group, which earlier required a complex set of query.…
Protecting your data! Fail-safe enhancements to Group Replication.
Group Replication has been around for some time now and the feedback from community is overwhelming. One of the suggestions (BUG#84795) received is related to deploying a mechanism to prevent a server from being updated after stopping group replication.…
Replication Features in MySQL 8.0.2
MySQL 8 is shaping up quite nicely. And we are having a blast in the MySQL replication team while this is happening. We are continuously improving all-things-replication by introducing new and interesting features. In addition, we have been listening to our community and addressing their feedback.…
Group Replication support SAVEPOINT
Group Replication has been around as GA for some months now. Nonetheless, work continues and now we are happy to let you know that you can now use transaction savepoints when write-set extraction is enabled.
This enhancement was released as in MySQL 8.0.1.…
MySQL 8.0.1 Replication Performance Improvements
MySQL 8.0.1 introduces new features and improvements to replication. The next sections summarize some related to performance.
1. WL#9556 – Writeset-based dependency tracking on the master
Transaction writesets can now be used to evaluate which transactions are independent and can be executed in parallel on the binary log applier on the asynchronous slaves.…
No new options, no new commands… Just faster at full load, where it counts!
Starting on MySQL 8.0.1, a very updated replica server will be more efficient (and probably faster) than previous MySQL versions because of improvements in the relationship between the replication threads. Preliminary testing showed a benefit of up to 65% on Sysbench Update Index.…
Improving the Parallel Applier with Writeset-based Dependency Tracking
MySQL 8.0.1 introduces a new mechanism to track the dependencies between transactions. This feature is used to optimize the binary log applier on asynchronous replication slaves, improving the throughput significantly on workloads where there is low-concurrency on the master and/or on systems with very fast storage.…