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Group Replication: A member in “RECOVERING” state is part of the primary partition

If you are using MySQL InnoDB Cluster (Group Replication) with ProxySQL, you should be familiar with the 2 functions and 1 view required in SYS Schema that ProxySQL uses to see if a node is online, partitioned or not, and if it’s lagging or not (see link1 and link2). I received recently a very valuable contribution from Bruce DeFrang that … Read More


pre-FOSDEM MySQL Day 2019

For the third year in a row, we will take advantage of the mass presence of our MySQL Engineers during FOSDEM to organize the pre-FOSDEM MySQL Day. The program of this 3rd edition is already on track, thank you to all the speakers who already confirmed their participation. Start End Event Speaker Company Topic Friday 1st February 09:30 10:00 MySQL … Read More


MySQL InnoDB Cluster with 2 Data Centers for Disaster Recovery: howto

As you know, MySQL InnoDB Cluster is a High Availability solution for MySQL. However more and more people are trying to use it as a Disaster Recovery solution with 2 data centers. Natively, this is not yet supported. But it’s already possible to realize such setup if we agree with the following points:  a human interaction is required in case … Read More


MySQL InnoDB Cluster: upgrade from 8.0.11 to 8.0.12

In April, I already posted an article on how to upgrade safely your MySQL InnoDB Cluster, let’s review this procedure now that MySQL 8.0.12 is out. To upgrade all the members of a MySQL InnoDB Cluster (Group), you need to keep in mind the following points: upgrade all the nodes one by one always end by the Primary Master in … Read More


MySQL InnoDB Cluster 8.0.12 – avoid old reads on partitioned members

We received feedback about how a member should act when leaving the group. And the majority of users wanted that when a node drops out of the group, it should kill all connections and shutdown. I totally agree with that behavior and it’s now the default in MySQL 8.0.12. This new feature is explained in WL#11568. Before this change, the … Read More


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