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596 blog posts in 13 categories

ClusterControl 1.2.10 Released

The Severalnines team is pleased to announce the release of ClusterControl 1.2.10. This release contains key new features along with performance improvements and bug fixes.

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Leveraging AWS tools to speed up management of Galera Cluster on Amazon Cloud

We previously covered basic tuning and configuration best practices for MyQL Galera Cluster on AWS. In this blog post, we’ll go over some AWS features/tools that you may find useful when managing Galera on Amazon Cloud. This won’t be a detailed how-to guide as each tool described below would warrant its own blog post. But this should be a good overview of how you can use the AWS tools at your disposal.

Installing Kubernetes Cluster with 3 minions on CentOS 7 to manage pods and services

Kubernetes is a system for managing containerized applications in a clustered environment. It provides basic mechanisms for deployment, maintenance and scaling of applications on public, private or hybrid setups. It also comes with self-healing features where containers can be auto provisioned, restarted or even replicated.

5 Performance tips for running Galera Cluster for MySQL or MariaDB on AWS Cloud

Amazon Web Services is one of the most popular cloud environments. Galera Cluster is one of the most popular MySQL clustering solutions. This is exactly why you’ll see many Galera clusters running on EC2 instances. In this blog post, we’ll go over five performance tips that you need to take under consideration while deploying and running Galera Cluster on EC2.

Monitoring Galera Cluster for MySQL or MariaDB - Understanding and Optimizing IO-related InnoDB metrics

This blog post is a follow up to our previous post on monitoring CPU-related InnoDB metrics in Galera Cluster. One of the main issues in terms of scalability of MySQL (and thereby also Galera) is the ability to handle large amounts of I/O activity. MySQL, historically, was not very good in this area - flushing caused bumps and spikes in the workload, and kernel mutex was wrecking havoc in the overall stability.

How to Configure Drupal with MongoDB Replica Set

Drupal’s modular setup allows for different datastores to be integrated as modules, this allows sites to store different types of Drupal data into MongoDB. You can choose to store Drupal’s cache, session, watchdog, block information, queue and field storage data in either a standalone MongoDB instance or in a MongoDB Replica Set in conjunction with MySQL as the default datastore. If you’re looking at clustering your entire Drupal setup, then see this blog on how to cluster MySQL and the file system.

Deep Dive Into How to Monitor Galera Cluster for MySQL, MariaDB & Percona XtraDB - Webinar Replay

Thanks to everyone who attended and participated in this week’s webinar on 'How to Monitor Galera Cluster'. If you missed the sessions or would like to watch the webinar again & browse through the slides, they are now available online. Our speaker this time was Krzysztof Książek, Senior Support Engineer, Severalnines.

SQL Load Balancing Benchmark - Comparing Performance of MaxScale vs HAProxy

In a previous post, we gave you a quick overview of the MaxScale load balancer and walked through installation and configuration. We did some quick benchmarks using sysbench, a system performance benchmark that supports testing CPU, memory, IO, mutex and also MySQL performance. We will be sharing the results in this blog post.

Database Security - How to fully SSL-encrypt MySQL Galera Cluster and ClusterControl

Data security is a hot topic for many companies these days. But for those who need to adhere to security standards like PCI DSS or HIPAA, security is not an option. We showed you sometime back how to encrypt Galera replication traffic, but for a more complete solution, you’ll want to encrypt all database connections from client applications and any management/monitoring infrastructure.

Deploy an asynchronous slave to Galera Cluster for MySQL - The Easy Way

Due to its synchronous nature, Galera performance can be limited by the slowest node in the cluster. So running heavy reporting queries or making frequent backups on one node, or putting a node across a slow WAN link to a remote data center might indirectly affect cluster performance. Combining Galera and asynchronous MySQL replication in the same setup, aka Hybrid Replication, can help. A slave is loosely coupled to the cluster, and will be able to handle a heavy load without affecting the performance of the cluster. The slave can also be a live copy of the Galera cluster for disaster recovery purposes.