Posts Tagged ‘GrabPERF

I fired up the Boston FIoS measurement location today after a couple of days off, and found that suddenly FIoS doesn’t like the BitTorrent.

The line of purple dots all indicate measurements that reported an error code. All of those measurements come from Boston FiOS. See the real-time graph here.
Accident? Design? That I cannot comment on. [...]

In the last 24 hours, thanks to the help of some willing volunteers, GrabPERF has seen the addition of three new measurement locations:

Dallas, TX (USA)
Virginia (USA)
London, UK

All of these location have been graciously provided by the team at e-planning.
Thanks to all of you who volunteer your machines and bandwidth for this project.
As always, we are [...]

Today, there was a network outage that affected the servers from September 21 2008 15:30 GMT until September 22 2008 01:45 GMT.
The data from this period has been cut and hourly averages have been re-calculated.
We apologize for the inconvenience.

In 2004-2005, as a lark, I created my own Web performance measurement system, using PERL, PHP and MySQL. In August 2005, I managed to figure out how to include remote agents.
I dubbed it…GrabPERF. An odd name, but an amalgamation of “Grab” and “Performance” that made sense to my mind at the time. I also never [...]

This is actually a short post to write, as the state of the GrabPERF system is currently very healthy. There was an eight-hour outage in early August 2008, but that was a fiber connectivity issue, not a system issue.
Over the history of ther service, we have been steadily increasing the number of measurements we take [...]

It’s the first day back after the last long weekend of the summer. There is a a great amount of news flooding the intertubes, and what happens?
TechCrunch has a small issue.

It’s likely they’ll be back soon, but it’s still an interesting thing to see.
Update – 09:17 EDT (13:17 GMT)
TechCrunch is back up as of 08:49 [...]

Between August 08 2008 18:00GMT and August 09 2008 03:00GMT, GrabPERF had a network-related outage at the hosting facility.
Many thanks to the Technorati team for working hard to resolve this complex issue, which eventually turned out to be a loose fiber-cable.
Data from the time period has been cut, so no one’s stats should be affected.
I [...]

The latest “rage” flooding through the social-media world is identi.ca, a Twitter-like micro-blogging service that is built on open-source servers and code.
As with anything that becomes an overnight sensation, the problems of success tend to follow. Using GrabPERF, I have been monitoring the HTML download time of my personal message stream. The results have been [...]

Yes, it’s YATPBP (Yet Another Twitter Performance Blog Post).
About 10 days ago, I turned GrabPERF loose on Twitter. Now before you accuse this of crippling the service and bringing it to its knees, realize that GrabPERF simply requests a document over HTTP about two times a minute. No additional requests are made for images and [...]

Through 2007, the number of posts I made per day/week/month decreased steadily. I know post new items 2-3 items a month, or less. After 2 years of steady entries, I just didn’t have anything to add to the conversation.
Having been an A-list groupie for this entire period, I lost touch with the self-perpetuating scene. A [...]


About this blog

Stephen Pierzchala is one of a 10-year veteran of the Web performance field who also writes on topics that interest his non-linear world-view.

Contact

stephen@pierzchala.com

+1 (508) 410-3865