Jan 14

More Statistics

Just over a year ago (in fact one of our first posts!) we posted some statistics about our estate and infrastructure. Here’s an update on where we are, plus some new stats:

  • Our data centre is now mostly virtual. We have 68 VMware servers and 4 Solaris virtualisation hosts, running nearly 1200 virtual machines. Including virtualisation hosts, but excluding HPC, we have less than 300 physical servers, meaning we are now more than 80% virtualised. Most of these physical systems are virtualisation hosts, or are at remote sites.
  • Our primary filestore cluster holds over 171TB of data (up 35% since March), of which 100TB is user files, 54TB is shared/resource data, 6TB is teaching and other data, and 11TB is backups.
  • The primary filestore cluster contains over 130 million files (a more than 50% increase since March), but it still holds true that 75% of which are less than 128KB.
  • Somewhat unsurprisingly, 31% of the files on the primary filestore cluster are Word Documents, JPEGs and PDFs.
  • Our VMware virtual infrastructure now has roughly 15TB of RAM (up ~50%) and 270TB of storage (more than double what we had at the time of the last post)
  • The 68 VMware hosts have 3.3 Terahertz of CPU capacity
  • During the day in term time, approximately 1600 people log in to Blackboard per hour. Weekends are much quieter with Saturday being the quietest day of the week. Wednesday is the quietest day of the working week with approximately 1400 people logging in per hour.
  • At peak times on an average week, there are now over 2,000 people logged in to SUSSED.
  • Since putting wireless in to halls, during peak times, we get more than 200,000 authentication requests to Eduroam per hour. Before term started this peaked at around 80,000 authentication requests per hour.


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  1. Avatar photo
    Matthew Deeprose

    Great post Clayton! The increase in Virtualisation over the past years is really impressive and putting the University in a very good place to deliver improvements at scale.

  2. Peter Hancock

    Very useful stuff this. Thanks for taking the time to make it available.

    1. Clayton Peters

      Thanks for the feedback, Pete!

  3. Justin Steele-Davies

    Very interesting, is there any chance of stats on the use of the VDI, I would be interested in faculty breakdown, duration of use and what devices are connecting to the service.

    1. Clayton Peters

      That’s a nice idea Justin. I’ll try and get a post out about that in the next week or two!

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