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MySQL Group Replication: understanding Flow Control

When using MySQL Group Replication, it’s possible that some members are lagging behind the group. Due to load, hardware limitation, etc… This lag can become problematic to keep good certification behavior regarding performance and keep the possible certification failure as low as possible. Bigger is the applying queue bigger is the risk to have conflicts with those not yet applied … Read More


Migration from MySQL Master-Slave pair to MySQL InnoDB Cluster: howto

MySQL InnoDB Cluster (or only Group Replication) becomes more and more popular. This solution doesn’t attract only experts anymore. On social medias, forums and other discussions, people are asking me what it the best way to migrate a running environment using traditional asynchronous replication [Master -> Slave(s)] to InnoDB Cluster.


MySQL Shell: eye candy for a future release !

  Today I presented MySQL InnoDB Cluster at the Helsinki MySQL User Group. To demonstrate how easy it’s to deploy a cluster with MySQL Shell and used the prompt that will be part of a future release just because it’s beautiful. If you also want to see how it looks like, just check the video below: There were several MongoDB … Read More


MySQL Group Replication and logical backup

Taking a logical backup of a member of a Group Replication Cluster is not something very easy. Currently (5.7.17, 5.7.18 or 8.0.0) if you want to use mysqldump to take a logical backup of your dataset, you need to lock all the tables on the member you are taking the dump. Indeed, a single transaction can’t be used as savepoints … Read More


MySQL Group Replication: native support in ProxySQL

ProxySQL is the leader in proxy and load balancing solution for MySQL. It has great features like query caching, multiplexing, mirroring, read/write splitting, routing, etc… The latest enhancement in ProxySQL is the native support of MySQL Group Replication. No more need to use an external script within the scheduler like I explained in this previous post. This implementation supports Groups … Read More


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