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419 blog posts in 11 categories

Scaling Wordpress and MySQL on Multiple Servers for Performance

Over the years, WordPress has evolved from a simple blogging platform to a CMS. Over seven million sites use it today, including the likes of CNN, Forbes, The New York Times and eBay. So, how do you scale Wordpress on multiple servers for high performance? 

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Several Ways to Install ClusterControl

With ClusterControl gaining in popularity, we are seeing users coming in from different angles. Some users are deploying their database cluster using our Online Configurators, others are looking to install ClusterControl to manage an existing database cluster. And some other users prefer to install ClusterControl first, and then use it to deploy database clusters on-premises.

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Turning MongoDB Replica Set to a Sharded Cluster

Replica Sets or Sharded Clusters?

** Diagrams updated on May 22nd. Thanks to Leif Walsh from Tokutek for his feedback.

Replica Sets are a great way to replicate MongoDB data across multiple servers and have the database automatically failover in case of server failure. Read workloads can be scaled by having clients directly connect to secondary instances. Note that master/slave MongoDB replication is not the same thing as a Replica Set, and does not have automatic failover. 

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Using HAProxy with Your Database Cluster

Severalnines s9s_haproxy script allows you to install HAProxy and loadbalance over the MySQL servers in your cluster. To learn more about HAProxy and SQL load balancing, see this HAProxy Tutorial.

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Scaling Drupal on Multiple Servers with Galera Cluster for MySQL

This post shows you how to move from a single instance Drupal/MySQL to a multi-server environment. A well designed multi-server deployment not only allows Drupal to scale, but will also enhance redundancy by removing single points of failure. Components used are Apache, PHP, csync2, lsyncd, Keepalived, HAproxy,&MySQL Galera ClusterClusterControl.

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Nagios Plugin for ClusterControl

Nagios is a very popular open source IT infrastructure monitoring tool, used by sysadmins to watch out for problems in their systems. If you use Nagios and would like to utilize it to monitor your database cluster, we have built a simple Nagios plugin for ClusterControl which can report on the status of your database cluster. The plugin is Nagios Plugin API v3.0 compatible.

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Install ClusterControl on Top of Existing MongoDB Sharded Cluster

**Attention: The instructions in this blog post are outdated. Please refer to ClusterControl Quick Start Guide for updated instructions.

In this post, we are going to show you on how to install and integrate ClusterControl on top of an existing MongoDB Sharded Cluster with a replica set of 3 nodes

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On-premises Deployment and Monitoring of MongoDB Sharded Clusters

Last year, we did a survey asking our users about any other databases they were using alongside MySQL. A clear majority were interested in using other databases alongside MySQL, these included (in order of popularity) MongoDB, PostgreSQL, Cassandra, Hadoop, Redis.

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Meet Our New ClusterControl v1.2


Severalnines ClusterControl v1.2 introduces support for MongoDB sharded clusters, as well as a new simple and user-friendly interface, with ability to provision clusters directly from the ClusterControl interface. 

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