Category Archives: Servers and Hardware

New Backup and Disaster Recovery System

As you know, we run most of our systems on virtual machines on top of a VMWare ESXi 4.1 cluster, which is located at the University of London Computer Centre off Russell Square. The cluster runs with a SAN (disk array) providing  20TB of storage (in RAID10 format for speed) for virtual machine operating systems and data.

In order to further protect ourselves and our partners from loss of data and service, we have just installed a new backup system comprising:

1) Veeam Backup & Replication software on the VMWare cluster

2) A system with approximately 24TB of disks in RAID6 format housed in a Dell MD1000 disk enclosure which allows for upto 2 concurrent disk failures. Continue reading New Backup and Disaster Recovery System

Digital Humanities – under the hood

DDH has been undertaking a major infrastructure project – a complete server renewal – over the past few months which we’re just about to complete, and we thought it might be interesting to say a bit more about the project, and the way in which we run our server infrastructure.

Once this work is complete – and the migration from old infrastructure to new is now underway (hooray!) – we will have a robust, resiliant and high performance development environment and platform for hosting our web-based projects which will last us for a full five years, with a sustainability and replacement plan taking us well into the future. It’s taken us a while to get here – as well as the support of College and a fair bit of creative thinking all round – but we now have the flexibility to support and sustain projects of all sizes.  We have modest annual costs associated with the collocation of our servers but our sustainability planning covers this, and otherwise we’re self-sufficient, and this is a great place for a department like ours to be.

Continue reading Digital Humanities – under the hood