Jan 22
I feel I’ve written a bit too much about spam filtering recently… but nonetheless, here’s one more, only with some graphs and maps! Attacks against our mail servers have not stopped since my last update – they’ve increased – but despite this, we’ve had very little spam (I won’t go as far as to say …
Jan 14
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 …
Nov 06
We’ve had a full month of our new edge SMTP service in place now so I thought I’d do a very quick post taking a look at how well it had performed in the last four weeks. Firstly the positive: 190,203 (!) attempts to send messages without authenticating A sum total of 430,431 (!!!) attempts …
Oct 13
Junk mail – it’s irritating enough when it comes through your door, but it’s just as frustrating when it clutters up your e-mail inbox too. Sadly, there’s no one-stop solution for dealing with spam – it’s a constant war between the spammers and the spammed. As we deal with one wave of spam, the next …
Mar 09
The University revolves around e-mail. It’s one of our most important and largest services, both in terms of number of users, and amount of hardware required to run it. It ties in to many systems, both within the University and externally, so it also one of our more complex systems. As mentioned in a previous …
Mar 08
To start us off then, here are some interesting statistics that we recently gathered: Our data centre holds around 1500 servers, over half of which are virtual machines. Our primary filestore cluster holds over 126TB of data, of which 90TB is user files, 27TB is shared/resource data, and 7TB is backups. On an average week, …
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