MySQL

The WHMCS software suite relies on a MySQL database to store its data, so how do you make it highly available? This blog post shows how to migrate the existing WHMCS database from a standalone MySQL server (provided by the WHM/cPanel server itself) to a three-node MariaDB Galera Cluster to improve the database availability.

MHA (Master High Availability) is a popular failover solution used in MySQL Master-Slave topologies. It is stable and used in production by large companies such as Facebook. In this blog, we outline the most common but important issues that you might encounter when running MHA. We’ll also see how to resolve them.

HAProxy is a great piece of software, but it may just not be enough for more demanding users and environments. How do you migrate from HAProxy to ProxySQL? This blog post explains the process and shows how ClusterControl can help.

There are many Docker images for MySQL and MariaDB, but which one should you use? This blog post lists the most popular Docker images that can be found on Docker Hub, the world's largest library and community for container images.

Whether you’re planning to migrate from Oracle database to MySQL or run your new project with MySQL, you need to know how to do copies of your data. In this blog post, we will cover some of the most typical cases of the data backups with reference to Oracle backup methods. We will tell you how to guard yourself against data loss, what tools and commands to use, and how can you recover your data.

It might not be possible to avoid disasters, but with some preparation, it is certainly feasible to reduce the impact on your business. Automatic failover is one of those things. The goal of database failover automation is to minimize your downtime and reduce loss of money. However, failover can not always be automated as there are risks; false positives may lead to unnecessary escalations.

In this blog, we’ll have a look components you may use to build an automated stack, and take a closer look at ClusterControl’s failover functionality.

ProxySQL 2.0 has been released recently with quite a few interesting features, including causal reads, SSL for frontend connections and native support for Galera Cluster. In this blog post, we will explore these new features.

Good system administrators and devops hate performing mundane tasks and constantly look for ways at automating themselves out of the job. There are plenty of automation tools out there to help the cause. But if automation is a no brainer, why aren’t more people doing it? In this blog post we compare three ways of deploying a MySQL Galera cluster - manual, Ansible playbook and ClusterControl.

In case of master failure in a MySQL Replication setup, the most updated slave can be promoted to new master and all slaves repointed to the new master. But once the failed master has been fixed, what is the best way to re-introduce it as master, so as to restore the original topology.

This blog post shows how to perform the MySQL master failback operation.

MySQL 8.0 is a big step forward in terms of data consistency, developer features, performance and availability. MySQL 8.0 shortens the gap between proprietary databases and open source world, making the migration decision much easier to take.

But how can you manage it, along with other relational open source databases? In this blog post, we look at the challenges of operating a MySQL 8.0 database, and see how important tasks like monitoring, alerting, backups and failover can be handled in an automated way.

ClusterControl 1.7.2 includes support for TimescaleDB, MySQL 8.0 and Maxscale 2.2 as well as improved support for PostgreSQL monitoring & backups. It also launches two new features, CC Spotlight (a new search tool) and CMON HA (distributed fault-tolerant controllers).

Choosing which DB engine to use between all the options we have today is not an easy task. An that is just the beginning. After deciding which engine to use, you need to learn about it and actually deploy it to play with it. In this whitepaper we’ll show you how to install, configure and secure some of the most popular open source DB engines.

How do I ensure that MHA (Master High Availability Manager) will always perform the failover for me? What would happen if it crashes? This blog post will answer your questions.

This blog post covers how to deploy a highly available MySQL or MariaDB database cluster for Camunda BPM 7.10 Community Edition on Linux. Camunda supports major databases through JDBC drivers, namely Oracle, DB2, MySQL, MariaDB and PostgreSQL. We will show two different implementations for the database endpoint, one leveraging ProxySQL and the other using the standard JDBC driver.

This whitepaper covers information about MySQL Replication, with information about the latest features introduced in 5.6, 5.7 and 8.0. There is also a more hands-on, practical section on how to quickly deploy and manage a replication setup using ClusterControl.

MySQL Replication is still favored by some organization as it's simple to implement and run. However, in a multi-cloud setup like Google Cloud Platform <–> Amazon Web Services, things can get tedious without proper cluster management, monitoring and observability tools. This blog showcases how to create a secure implementation of cloud <–> cloud replication and how ClusterControl can be used to resolve these impediments.

Long running queries are pretty much inevitable in MySQL or MariaDB, and unfortunately, they can lead to disastrous results. But why do queries take long time to execute? How do you deal with them?This blog post shows how you can use ClusterControl to easily detect them, especially in environments with many database instances.

To insulate our database infrastructure from failures, we build redundant cluster systems. For instance, MySQL and MariaDB high availability can be implemented by master-slave as well as master-master replication solutions. There are a number of variables that affect our choice solution. In this blog, we will look into considerations around latency.

ProxySQL 2.0 has become GA and it comes with new exciting features such as GTID consistent reads, frontend SSL, Galera and MySQL Group Replication native support. This blog post shows how to run the new ProxySQL 2.x for Galera Cluster on Docker container, which is quite a bit different as compared to ProxySQL 1.x.

These days high availability is a must for any serious deployment. Long gone are days when you could schedule a downtime of your database for several hours to perform a maintenance. Making a database environment highly available is one of the highest priorities nowadays alongside data integrity. For a database, which is often considered the single source of truth, compromised data integrity can have catastrophic consequences.

Replication and Galera Cluster are both widely used to implement high availability for MySQL/MariaDB, but when should you pick one over the other? What are the limitations of each solution, and what are the trade offs?
In this blog post, we will look at the differences in terms of data consistency, conflict resolution, failover, node provisioning and robustness.