5 of 16Image
PGS European datacentre
Petroleum Geo-Services (PGS) operates its European datacentre in Weybridge, Surrey. The facility crunches seismic data gathered by a fleet of ships spread across the globe.
READ MORE: Inside an oil industry datacentre
The datacentre, dubbed a "megacentre" by the firm, was opened on November 2008 and replaced a 15-year-old facility. It was designed by Keysource, a datacentre specialist contractor, and has a PUE rating of 1.148. This was achieved in part through the use of cooling techniques such as filter bags (pictured), which filter warm air and send it back through a water-cooled gate for reuse.
Image: Jack Clark
HP datacentre, Sydney
HP's latest datacentre is built on 13.4ha of land out in Western Sydney. Currently under construction, it has been designed from the ground up, in the form of three separate shells that are able to operate independently of each other.
Each cell provides a space of 2000m2 for racks in a hot-aisle configuration, and an additional 500m2 of raised floor space.
The majority of racks in the first cell run on a concrete slab (pictured). Hot air is exhausted out, into the aisles.
READ MORE: HP opens Sydney datacentre: photos
Rackspace's Slough-based datacentre houses the hardware for its UK cloud, along with the other servers rented by its customers. It has 1,600 racks in place, of which 120 support its cloud.
The datacentre, in operation since June 2008, was in the process of being expanded when ZDNet visited in 2011, with the company adding a further data hall. At the same time, Rackspace is bringing in new cooling systems to increase the efficiency of the site and cut its power costs.
Rackspace's server hardware is predominantly supplied by Dell. It operates a multi-vendor networking approach: Cisco is the predominant provider of switching technology, while Juniper Networks supplies backbone services and Brocade provides equipment for load balancing.
TAKE THE TOUR: Inside Rackspace's UK cloud datacentre
Image: Jack Clark