MySQL 8.4 has two good options for High Availability clusters: Galera Cluster (and Percona XtraDB Cluster (PXC)) plus MySQL InnoDB Cluster. Both solutions are now mature enough, so what is the deciding factor? Workload characteristics, application compatibility (Galera is virtually synchronous; InnoDB Cluster offers 2 modes – single primary mode, which is one instance being read-write, with the rest being read only, and multi-primary mode, which is closer to what Galera Cluster is) and operational preferences, most likely will decide which one comes out top in 2025, is what we aim to answer at next week’s webinar.

Due to the lack of real-world usage statistics (we can tell you how many Galera Cluster downloads we have, for example, or even customer numbers, but we won’t have anything to compare against), we look at proxy statistics, like …

Large tables can pose challenges for many operations when working with a database. Occasionally, we may need to modify the table definition. Since RDS replication does not use asynchronous for its replication, the typical switchover procedure is not feasible. However, the Blue/Green feature of RDS utilizes asynchronous replication, which allows us to update the table […]

Group replication is a fault-tolerant/highly available replication topology that ensures if the primary node goes down, one of the other candidates or secondary members takes over so write and read operations can continue without any interruptions. However, there are some scenarios where, due to outages, network partitions, or database crashes, the group membership could be broken, or we end […]

In my previous article, Comparisons of Proxies for MySQL, I showed how MySQL Router was the lesser performing Proxy in the comparison. From that time to now, we had several MySQL releases and, of course, also some new MySQL Router ones.Most importantly, we also had MySQL Router going back to being a level 7 proxy […]

Learn how to seamlessly add a new node to MySQL Group Replication from a backup. Scale your cluster, save time, and efficiently manage data updates and recoveries.

1. Hot Physical backup approach
2. Clone plugin approach
3. Logical backup approach

We highly recommend checking out our previous blog post on …

Explore the powerful features of Aurora Serverless V2 for MySQL in this informative blog series. Learn about read-only scaling, parameter support, and cost performance. Compare costs between Provisioned Aurora and Aurora Serverless V2. Discover key takeaways for optimizing your MySQL deployment on the cloud. Read now!

1. Read-only Scaling
   1. Failover replicas
   2. …

Table of contents:

1. Introduction
2. Common reasons for switching the primary node
3. Primary Promotion and its importance
4. Methods for switching the primary node
5. …

In the first part of this short series, we went through the build of a full Clusterset architecture, which included 2 full clusters (3 members each) and an additional cluster with one member, which can serve different purposes. With the MySQL ClusterSet, there are new capabilities with the router instances. These features enable valuable options for users of… Read More »

Aurora cluster promises a high availability solution and seamless failover procedure. However, how much is actually the downtime when a failover happens? And how proxySQL can help in minimizing the downtime ? A little sneak peek on the results ProxySQL achieves up to 25x less downtime and the impressive up to ~9800x less errors during unplanned failovers. How proxySQL achieves this: 

1. Less downtime
2. “Queueing” feature when an instance in a hostgroup becomes unavailable.

So what is ProxySQL? ProxySQL is a middle layer between the database and the application. ProxySQL protects databases from high traffic spikes, prevents databases from having high number of connections due to the multiplexing feature and minimizes the impact during planned/unexpected failovers or crashes of DBs. 

This blog will continue with measuring the impact of an unexpected …

InnoDB Cluster has been around for what feels like a long time. It is the core platform for MySQL High Availability. InnoDB Cluster NOW extends that core feature into a platform that also enables DR support where multiple Disaster Recovery Regions are capable.