November 22, 2014

Q&A: Percona XtraDB Cluster as a MySQL HA solution for OpenStack

Thanks to all who attended my Nov. 12 webinar titled, “Percona XtraDB Cluster as a MySQL HA Solution for OpenStack.” I had several questions which I covered at the end and a few that I didn’t. You can view the entire webinar and download the slides here. Q: Is the read,write speed reduced in Galera […]

Galera data on Percona Cloud Tools (and other MySQL monitoring tools)

I was talking with a Percona Support customer earlier this week who was looking for Galera data on Percona Cloud Tools. (Percona Cloud Tools, now in free beta, is a hosted service providing access to query performance insights for all MySQL uses.) The customer mentioned they were already keeping track of some Galera stats on Cacti, and […]

Semi-Sync replication performance in MySQL 5.7.4 DMR

I was interested to hear about semi-sync replication improvements in MySQL’s 5.7.4 DMR release and decided to check it out.  I previously blogged about poor semi-sync performance and was pretty disappointed from semi-sync’s performance across WAN distances back then, particularly with many client threads. The Test The basic environment of these tests was: AWS EC2 […]

MySQL High Availability With Percona XtraDB Cluster (Percona MySQL Training)

I’ve had the opportunity to train lots of people on Percona XtraDB Cluster (PXC) over the last few years the product has existed.  This has taken the form of phone calls, emails, blog posts, webinars, and consulting engagements. This doesn’t count all the time I’ve spent grilling Codership on how things actually work.  But it […]

Doing a rolling upgrade of Percona XtraDB Cluster from 5.5 to 5.6

Overview Percona XtraDB Cluster 5.6 has been GA for several months now and people are thinking more and more about moving from 5.5 to 5.6. Most people don’t want to upgrade all at once, but would prefer a rolling upgrade to avoid downtime and ensure 5.6 is behaving in a stable fashion before putting all of […]

ClusterControl for Percona XtraDB Cluster Improves Management and Monitoring

ClusterControl for Percona XtraDB Cluster is now available in three different versions thanks to our partnership with Severalnines. ClusterControl will make it simpler to manage and monitor Percona XtraDB Cluster, MySQL Cluster, MySQL Replication, or MySQL Galera. I am very excited about our GA release of Percona XtraDB Cluster 5.6 last week. As Vadim described […]

The use of Iptables ClusterIP target as a load balancer for PXC, PRM, MHA and NDB

Most technologies achieving high-availability for MySQL need a load-balancer to spread the client connections to a valid database host, even the Tungsten special connector can be seen as a sophisticated load-balancer. People often use hardware load balancer or software solution like haproxy. In both cases, in order to avoid having a single point of failure, […]

Useful MySQL 5.6 features you get for free in PXC 5.6

I get a lot of questions about Percona XtraDB Cluster 5.6 (PXC 5.6), specifically about whether such and such MySQL 5.6 Community Edition feature is in PXC 5.6.  The short answer is: yes, all features in community MySQL 5.6 are in Percona Server 5.6 and, in turn, are in PXC 5.6.  Whether or not the new […]

Percona XtraDB Cluster/ Galera with Percona Monitoring Plugins

The Percona Monitoring Plugins (PMP) provide some free tools to make it easier to monitor PXC/Galera nodes.  Monitoring broadly falls into two categories: alerting and historical graphing, and the plugins support Nagios and Cacti, respectively, for those purposes. Graphing An update to the PMP this summer (thanks to our Remote DBA team for supporting this!) added a Galera-specific host template that […]

2 new features added to Percona XtraDB Cluster (PXC) since 5.5.31

With the last Percona XtraDB Cluster (PXC) release, two major features were added: * a new command to bootstrap the cluster was added to the init script * SST via Xtrabackup now supports Xtrabackup 2.1 features In this post, I want to explain the benefits of these added features and how to use them. If […]