A few things we have noticed recently when it comes to Galera Manager support requests, that we feel we should address in this blog post.

First and foremost, it is a requirement that you install Galera Manager on a clean host. This means you install the base operating system and nothing else: no Nginx, no Apache, no InfluxDB, etc. The Galera Manager installer (gm-installer) will pull all the requisite packages, set SELinux to permissive during the install, etc. The next release of the gm-installer aims to be less fragile when it comes to this, and will aggressively handle installs on machines that already have software installed on it.

The other common issue is the inability to access ports, generally blocked by a firewall (gm-installer should have fixed this as long as setup is going properly), or some other reason. What gm-installer cannot fix …

Codership is pleased to announce a new Generally Available (GA) release of the multi-master Galera Cluster for MySQL 5.7, consisting of MySQL-wsrep 5.7.38 (release notes, download). This release incorporates all changes to MySQL 5.7.38, adding a synchronous option for your MySQL High Availability solutions.

In MySQL 5.7.38, we now distinguish between unset ssl_mode and ssl_mode explicitly set to “DISABLED”, because previously ssl_mode=DISABLED was ignored in the xtrabackup-v2 script.

This is a rare release where you are also meant to continue using the Galera replication library 3.37 implementing the wsrep API version 25, from the previous release, as there was no changes made to the Galera replication …

Codership is pleased to announce a new Generally Available (GA) release of the multi-master Galera Cluster for MySQL 5.7 and 8.0, consisting of MySQL-wsrep 5.7.37 (release notes, download) and MySQL-wsrep 8.0.28 (release notes, download) with Galera replication library 3.37 (release notes, download) implementing wsrep API …

The Galera Cluster Enterprise Edition

Codership is pleased to announce the Galera Cluster Enterprise Edition.

Galera Cluster Enterprise Edition consists of an enhanced Galera Cluster server, Galera Manager and Galera Load Balancer.

The enhanced Galera Cluster Server includes

1) A new Online Schema Upgrade method called Non Blocking Operations (NBO), adds more high availability to your cluster while performing schema changes.

• • Schema changes made on all cluster nodes in the same total order sequence, with much more efficient locking compared to the Total Order Isolation (TOI) method.
  • SET GLOBAL wsrep_OSU_method='NBO'

…

Codership, the leading MySQL High Availability clustering solutions company behind Galera Cluster, is pleased to announce the general availability of Galera Manager, a web-based graphical user interface (GUI) tool to easily deploy and manage your Galera Clusters. With today’s release, you can now create fully managed clusters in Amazon Web Services, you can also deploy clusters on user provided hosts (on premise or in the cloud) and you can also fully monitor your existing clusters.

We now have the concept of a managed node (your typical MySQL instance) and managed host (your typical Linux instance) which you use to deploy Galera Cluster in Amazon EC2, a managed node and a monitored host for user provided hosts (on premise or …

Codership, the developers of Galera Cluster for MySQL, provides training sessions in September 2021 for EMEA and USA timezone.

The Advanced Database Administrator with Galera Cluster training course teaches you how to install and configure in real-time a Galera Cluster for your application use cases. You will participate in interactive hands-on labs. Our expert instructor will teach you how to design and maintain your Galera Cluster for MySQL high availability and scalability. If you are a DBA or been given a Galera Cluster to manage, this is the course for you, as you’ll learn how to run your Galera Cluster in an optimal fashion, from setup, performance tuning, monitoring, as well as backups and more.

For more information, please read the full CONTENT BRAKEDOWN  course.

Course Dates

EMEA: …

Codership is pleased to announce a new Generally Available (GA) release of the multi-master Galera Cluster for MySQL 5.7 and 8.0, consisting of MySQL-wsrep 5.7.34 (release notes, download) and MySQL-wsrep 8.0.25 (release notes, download) with Galera replication library 3.34 (release notes, download) implementing wsrep API version 25 …

We might have had one of our largest, most well attended webinars in recent times, for both EMEA and North American timezones, and we thank you for attending. We had many good questions, and we realise that this is a popular topic, so expect to get more blog posts around this. It also helps us drive the development of Galera Manager further, to know what you want (a new release, is just around the corner).

The video recording  of the webinar is available and we encourage you to take a gander.

We did demo a 9-node Galera Cluster running across San Francisco, London and Singapore, and also discussed latency for local nodes, a local Galera Cluster, as well as what penalty you …

Codership first released a version of MySQL 5.7 with the audit log plugin back when Galera Cluster for MySQL 5.7.30 was released back in June 2020. More recently, we also added the audit log plugin to Galera Cluster for MySQL 5.6.51 in April 2021, but I guess the most important was that we also started including it in Galera Cluster for MySQL 8.0.21 too. We also started supporting it across various distributions, including Debian. For today’s exercise, we will use Galera Cluster for MySQL 8.0.23 on CentOS 7 (compatible with Red Hat Enterprise Linux 7). …

Just last week we had a Galera Cluster for MySQL streaming replication feature deep dive webinar, by the person that implemented it – Seppo Jaakola. In fact, if you haven’t already read the entire story, we encourage you to read: Galera Streaming Replication: Too Big A Bite Can Choke Your Cluster. We also have the 60 minute video recording for reference.

A huge number of Galera Cluster users have always complained about having issues with large transactions (where writes hang but reads are OK), and we are certain that the correct usage of streaming replication is what will ease that burden. What constitutes a large transaction? Typically when you make big number of …