On September 21st, we released Percona XtraDB Cluster 5.6.25. This is the first PXC release supporting proxy-protocol that has been included in Percona Server since 5.6.25-73.0. With this blog post, I want to promote a new feature that you may have ignored. Let’s start with a description of the use case: Architecture Overview: HAProxy is configured like […]
Read MoreLast week I hosted a webinar on using MySQL in the cloud for High Availability (HA) alongside 451 Research analyst Jason Stamper. You can watch the recording and also download the slides (free) here. Just click the “Register” button at the end of that page. We had several excellent questions and we didn’t have time […]
Read MoreHAProxy is frequently used as a software load balancer in the MySQL world. Peter Boros, in a past post, explained how to set it up with Percona XtraDB Cluster (PXC) so that it only sends queries to available nodes. The same approach can be used in a regular master-slaves setup to spread the read load across […]
Read MoreHAProxy is frequently used as a load-balancer in front of a Galera cluster. While diagnosing an issue with HAProxy configuration, I realized that logging doesn’t work out of the box on CentOS 6.5. Here is a simple recipe to fix the issue. If you look at the top of /etc/haproxy/haproxy.cfg, you will see something like: […]
Read MorePercona XtraDB Cluster (PXC) itself manages quorum and node failure. Minorities of nodes in a network partition situation will move themselves into a Non-primary state and not allow any DB activity. Nodes in such a state will be easily detectable via SHOW GLOBAL STATUS variables. It’s common to use HAproxy with PXC for load balancing purposes, but […]
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The aim of this post is to enumerate real-world usage of Percona XtraDB Cluster (PXC), and also to solicit use cases from the readers. One of the prominent usages in the production environment that we have come across (and our Percona consultants have assisted) is that of HP Cloud. There is a post about it […]
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