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Frederic DescampsThis blog post will discuss what is necessary of the Percona Live Advanced Percona XtraDB Cluster tutorial. Percona Live 2016 is happening in April! If you are attending, and you are registered to the Percona XtraDB Cluster (Galera) tutorial presented by Kenny and myself, please make sure that you: Bring your laptop, this is a […]
In this blog post, we’ll discuss read-write split routing in MaxScale. The two previous posts have shown how to setup high availability (HA) with Maxscale using asynchronous replication and how we monitor replication. Now let’s focus on the routing module performing read-write splits. This is our current configuration:
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[Splitter Service] type=service router=readwritesplit servers=percona1, percona2 max_slave_replication_lag=30 user=maxscale passwd=264D375EC77998F13F4D0EC739AABAD4 |
This router module is designed to spread […]
In this blog post, we’ll discuss JSON document fast lookup with MySQL 5.7. Recently I attended Morgan Tocker’s talk on MySQL 5.7 and JSON at FOSDEM, and I found it awesome. I learned some great information from the talk. Let me share one of them here: a very useful trick if you plan to store JSON […]
In this post, we’ll address how MaxScale monitors servers. We saw in the We saw in the previous post how we could deal with high availability (HA) and read-write split using MaxScale. If you remember from the previous post, we used this section to monitor replication:
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[Replication Monitor] type=monitor module=mysqlmon servers=percona1, percona2, percona3 user=maxscale passwd=264D375EC77998F13F4D0EC739AABAD4 monitor_interval=1000 script=/usr/local/bin/failover.sh events=master_down |
But what are we monitoring? We are monitoring […]
In this post, the first one of a Maxscale series, I describe how to use MariaDB’s MaxScale and MySQL-utilities with MySQL Asynchronous replication. When we talk about high availability with asynchronous replication, we always think about MHA or PRM. But if we want to transparently use the slave(s) for READs, what can we use ? Description: […]
In this blog post, we’ll determine a MySQL connection using SSL… or not. Since MySQL 5.7.5 the server generates SSL certificates (see auto_generate_certs) by default if compiled with SSL, or uses mysql_ssl_rsa_setup if compiled with YaSSL. But how can we check to see if our MySQL client connection uses SSL? When using an interactive client, it’s […]
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 […]
You can already feel the cold of February coming slowly… you can also smell waffles, fries and see a large amount of beards walking around with laptops… you are right, FOSDEM is coming! And as every year, the MySQL Community will also be present! For the 4th year in a row, I’ll perpetuate the organization […]
In the first post in a series on MariaDB features we find interesting, we begin with selectively skipping replication of binlog events. This feature is available on MariaDB 5.5 and 10. By default when using MySQL’s standard replication, all events are logged in the binary log and those binary log events are replicated to all slaves […]
There is one new feature in MySQL 5.6 that didn’t get the attention it deserved (at least from me 😉 ) : “DATA DIRECTORY” for InnoDB tables. This is implemented since MySQL 5.6.6 and can be used only at the creation of the table. It’s not possible to change the DATA DIRECTORY with an ALTER […]
Before Percona XtraBackup 2.1.7 and Percona XtraDB Cluster 5.6.15-25.3, rsync was the only SST method supporting GTID in the way that it was possible to move an asynchronous slave from one Galera node to another one (related bug). Indeed, previous versions of Percona XtraBackup didn’t copy any binary log and due to that, moving the […]
FOSDEM is a free, yearly event that offers open source communities a place to meet, share ideas and collaborate. It takes place in Brussels, Belgium each February. 10 years ago now, the first MySQL devroom was organized there by David Axmark, marking the first time MySQL users got their own space to come together and […]
As every year in February, in Brussels, the FOSDEM will take place! And as every year, the MySQL Community will also be present! For the 3rd year in a row, I have the honour of organising the MySQL & Friends Devroom. Let’s start with the most important information: FOSDEM 2014 will be held February 1 and […]
I will be in Prato (Firenze), Italy Thursday and Friday (September 19th and 20th) to deliver 2 presentations at OSS4B: Installing and managing MySQL like a real devops: automation in production Introduction to Percona XtraDB Cluster If you want to learn about these projects or discuss anything related to MySQL and Percona, join the conference […]
In the MySQL ecosystem, there is some sort of conference or another all year long. But why are they important? To answer this, we can split the audience into 3 groups: – MySQL Professionnals – MySQL Community Members – MySQL (Future?) Users Depending on which category you are in, you can have different expectations about […]
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 […]
If you are using Percona Replication Manager (PRM) with RHEL/CentOS prior to 6.4, upgrading your distribution to 6.4 may break your cluster. In this post I will explain you how to fix your cluster in case it breaks after a distribution upgrade that implies an update of pacemaker from 1.1.7 to 1.18. You can also […]
Before version 5.5.28 of Percona XtraDB Cluster, the easiest way was to join the cluster using wsrep_urls in [mysqld_safe] section of my.cnf. So with a cluster of 3 nodes like this : node1 = 192.168.1.1 node2 = 192.168.1.2 node3 = 192.168.1.3 we defined the setting like this :
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wsrep_urls=gcomm://192.168.1.1:4567,gcomm://192.168.1.2:4567,gcomm://192.168.1.3:4567 |
With that line above in my.cnf […]
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 […]