If you are using SElinux, you should know that it’s advised to disable it to avoid issue with PXC. Generally the communication between your nodes doesn’t work properly and a node having SElinux enabled won’t be able to join the cluster. So when a node doesn’t join the cluster where it should, my first reflex […]
How easy is it to identify and debug Percona XtraDB Cluster replication problem ? If you are using PXC, you may have already seen in your datadirectory several log files starting with GRA_ Those files correspond to a replication failure. That means the slave thread was not able to apply one transaction. For each of […]
Migrating several single standalone MySQL server to one Percona XtraDB Cluster… MariaDB to the rescue !
Some weeks ago I had to migrate some independent MySQL servers (some standard MySQL masters, and some just standalone) to a Percona XtraDB Cluster of 3 nodes. So the easiest way would be to configure each node to become also an asynchronous slave of one of the production servers. Like illustrated here: But in this […]
On Monday I will deliver with Seppo Jaakola from Codership a tutorial on Percona XtraDB Cluster (Percona Server + Galera). Already in London and you don’t know how to consume the hotel’s bandwidth ? If you attend this tutorial, you can download the Virtual Box appliance we will use during the session.
If you are interested by a great and revolutionary HA solution for MySQL or even if you already have some experience with PXC and/or Galera, I invite you to attend the tutorial I will deliver in Percona Live MySQL Conference London 2012 (PLUK2012), December 3rd : Percona XtraDB Cluster in a nutshell. Small amount of […]
2013 is near… and so is the next FOSDEM edition ! This year again, MySQL will be represented by its Community. If you want to discuss with friends of MySQL it’s the place to be in February ! Like every year, FOSDEM takes place the first week-end of February in Brussels. We will again have […]
First I wanted to thanks all the attendees and for the nice comments I got. As promised during the webinar, these are the answers of the questions you asked. Q: Does Percona provide plugin for cacti? A: Yes we do. They are part of Percona Monitoring Plugins. You can see some examples here. Q: What […]
“devops” seems to be everywhere now, or at least everyone is talking about it. But what does that really mean? And how does the DBA integrate the movement ? During next week’s webinar, I will explain to you the big principles of the devops culture and illustrate how DBA’s can (must) be part of the […]
Some people want to use a backup to prepare a new Percona XtraDB Cluster node. They want this to avoid State Snapshot Transfer that could slow down the donor (depending of the SST method you are using, the donor can be blocked. I will cover this in a future blog post). As backup are generally […]
During the design period of a new cluster, it is always advised to have at least 3 nodes (this is the case with PXC but it’s also the same with PRM). But why and what are the risks ? The goal of having more than 2 nodes, in fact an odd number is recommended in […]