Wednesday, January 23, 2013


AvailabilityYes, we're talking availability. The overall availability of the ITRP service was 99.99% for the past year. In total there were 9 outages during the 366 days of 2012, which together accounted for 55 minutes of downtime. The longest outage period was 15 minutes (in September), the others were all limited to 5 minutes. Most were due to planned database maintenance.

A few years ago we asked Pingdom to start monitoring the availability of the ITRP service. Naturally, we also use our own tools to monitor the service, but we wanted to provide customers real-time access to measurement data that is independently gathered. We know that our customers value this kind of transparency. If you were not aware of this already, you can track the health of the ITRP service at

Naturally, we are not entirely satisfied with a 99.99% availability. Still, when we consider the transformation that our infrastructure has gone through, we are not exactly depressed about it either.

Apart from the usual expansion to accommodate the increase in the number of users during 2012, we also improved the architecture to deliver even better performance around the globe. One major improvement, for example, was the use of a content delivery network (CDN) that makes the static content of the application (not the data) available on servers that are located closer to the users. Another important upgrade was the addition of dedicated servers for tasks that can be handled in the background.

It is going to be hard to get to 99.999% availability in 2013 as that represents a total downtime duration of only 5 minutes, but we are certainly going to try.

You know how you can keep an eye on us.