Tuesday, 13 December 2011

The Perils of CDNs

So CERN have just held a popular webcast event to announce the latest results in the search for the Higgs. Many of the webcast viewers (no I don't have usage stats) were complaining that the stream was choppy. What I did notice on my laptop (couldn't get near the auditorium) was that the main libflashplayer traffic was inbound from 93.174.99.0/24 VELOCIX-EU - could this be the CDN used by Groovy Gecko?

Not having an onsite mirror though then meant that each member of staff watching was then pulling data *in* to site as the traffic graph shows:



I'm sure this can't be efficient... Ho Hum.


Thursday, 8 December 2011

Another year of LHC Secrecy

So, another year of LHC running comes to a successful close, Once again we've managed to keep the real facts hidden from everyone - Not the Higgs (as thats's being discussed next week) but more importantlt that the whole of the LHC is actually a spinoff from one of the major Data Centre companies who had outgrown their shed. The Proof? why - of course...

however, best to keep it a secret - its easier to get runding for a mythical 27km tunnel than a shed :-) Oh, and a lot less sexy in the books too...

Overlaying SLURM job timings on Grafana plots

As you may have noticed, I'm quite fond of Grafana and use it at home and work. One of the dashboards I have at work is the general sta...