Rackspace vs Amazon impressions

I’ve been a customer of Amazon Web Services since they have been in beta. I’ve also worked with Rackspace now and then. Lately I’ve been working extensively with Rackspace infrastructure so I have a better understanding of their products. Bellow there are a few things that bother me at Rackspace: Instances The thing you are […]

Installing memcached with repcached patch for HA memcache cluster

About Repcached is an interesting patch for memcached which allows replication between 2 memcached nodes (servers). The purpose of this article is to setup 2 memcached servers that replicate each others. Note: This article is specifically written for Ubuntu 12.04 and memcached version 1.4.13. It may or it may not work for other versions. Setup […]

How to setup Galera 3 node cluster on Ubuntu 12.04

Galera is a multi-master replication solution for MySQL, which provides an interesting alternative to the standard master-master MySQL replication we are all so used with. One main advantage of Galera is the ability of doing sync replication, thus reducing the risk of data inconsistency between masters. Setup on RackSpace Cloud 3x 512MB RAM instances, with […]

Benchmark Galera cluster vs MySQL master-master on RackSpace

Setup: Before starting this I would like to point out that I have compared 2 instances(master-master) vs 3 instances(galera cluster) so the test is not correct/accurate. It’s more of a “what if I switch from master-master replication to 3 nodes galera”. MySQL Master-Master replication: 2x 512 MB instances with 20GB of storage, Ubuntu 12.04 64bit, […]