Paessler Blog
Archive for "03/2010"
2010-Mar-30
PRTG Network Monitor Gets a Massive Performance Boost for Large Installations
With the just-released version 7.3.3 of PRTG we are introducing significant improvements for PRTG's built-in web server. Especially for large installations with thousands of sensors, the user experience of both Windows and web interface will be noticeably faster. In our lab, we run installations of PRTG with 10,000 and 20,000 sensors. The 20,000 sensor installation, for example, runs on a water-cooled PC (Alienware) with a Core-2-Quad CPU at 2.66 GHz, i.e. quite a powerful machine. But with PRTG 7.3.2 most web pages took 5 - 10 seconds to generate. Some even took 30 - 50 seconds. We thought that's too slow. So we got our hands dirty, found a few things that needed to be changed and – wow! – with PRTG 7.3.3 all pages are being delivered in one second or less.2010-Mar-18
First results: Which CDN Provider serves you fastest?
10 days ago I have announced our globally distributed CDN speed test on this blog. At CloudClimate.com we have developed a CDN Performance Test suite that Internet users can run over your their personal Internet connection. The test performs ten downloads of a 64 Kbyte image from 12 selected CDN hosting companies plus 12 cloud servers running in public clouds around the globe. Thanks to all users who have visited the webpage in the mean time. We now have logged the results from 66.000 test requests in our database and I can go ahead and publish our first results.2010-Mar- 8
Big CDN Provider Test: Who Serves You Fastest?
Nowadays, state of the art websites use CDNs (Content Delivery Networks) to deliver static websites assets like images, CSS, and JavaScript files. In order to deliver these objects as fast as possible to the website visitor, the CDN providers run a network of so called "edge servers" in multiple locations. As soon as your browser requests a website object, its connection is directed to the nearest server (in a network topological view) which finally delivers the data. This sounds great in theory, but in real life it can be a complex task. One aspect is running an edge server network around the world (largest provider Akamai reports more than 40,000 servers around the globe). And there is "the last mile" issue: Website visitors usually do not sit in data centers with fiber optic connections, but use cable, DSL, T1, etc. instead. With a broadly conceived test, we want to find out:2010-Mar- 1