Building a Highly Available Database for Moodle Using MariaDB (Replication & MariaDB Cluster)
Face-to-face meetings, nowadays, are limited to the bare minimum, online activities have taken over as the main way for teacher - student interaction. It increased the stress on the existing online “meeting” platforms (is there...
Clustering Moodle on Multiple Servers for High Availability and Scalability
Moodle is an open-source e-learning platform (aka Learning Management System) that is widely adopted by educational institutions to create and administer online courses. For larger student bodies and higher volumes of instruction, moodle must be...
Comparing MariaDB Server to MariaDB Cluster
MariaDB Server and MariaDB Cluster are open source products powered by the MariaDB Corporation. MariaDB Server is one of the most popular relational databases, it was originally forked from MySQL server. MariaDB Cluster is a...
MaxScale Basic Management Using MaxCtrl for MariaDB Cluster
In the previous blog post, we have covered some introductions to MaxScale installation, upgrade, and deployment using MaxCtrl command-line client. In this blog post, we are going to cover the MaxScale management aspects for our...
What is MariaDB Enterprise Cluster?
MariaDB Enterprise Cluster is a subscription service of a highly available database solution from MariaDB Corporation which is managed with an Enterprise Lifecycle. There are three aspects of the Enterprise Lifecycle that are provided by...
How to Deploy a MariaDB Cluster for High Availability
MariaDB Cluster is a multi-primary replication system built from MariaDB Server, MySQL wsrep patch and Galera wsrep provider. Galera is based on synchronous (or ‘virtually synchronous’) replication method, which ensures the data applied to other...
Multi-Cloud Galera Cluster on AWS and Azure via Asynchronous Replication
In this blog post, we are going to set up two Galera-based Clusters running on Percona XtraDB Cluster 5.7, one for the production and one for the disaster recovery (DR). We will use ClusterControl to...
MariaDB Cluster Offline Installation for CentOS
Most of the installation steps available on the Internet cover the standard online installation, presuming the database hosts are having an active internet connection to the package repositories and satisfy all dependencies. However, installation steps...
Multi-Cloud Full Database Cluster Failover Options for MariaDB Cluster
High availability is paramount in today's business reality. But every service provider comes with an inherited risk of disruption -- and cloud service providers are no different. If they go down, even temporarily, then so...
How to Restore a Single Table Using Percona Xtrabackup?
Backups are the means of protecting from data loss - should something happen, you can easily restore it from the backup. You cannot predict what part of the data will have to be restored -...
How to Fix a Lock Wait Timeout Exceeded Error in MySQL
One of the most popular InnoDB errors is InnoDB lock wait timeout exceeded, for example: SQLSTATE[HY000]: General error: 1205 Lock wait timeout exceeded; try restarting transaction The above simply means the transaction has reached the...
How to Protect your MySQL or MariaDB Database From SQL Injection: Part Two
In the first part of this blog we described how ProxySQL can be used to block incoming queries that were deemed dangerous. As you saw in that blog, achieving this is very easy. This is...