Windows 7 / Vista / 2008 TCP/IP tweaks
On Speedguide.net there is a great article
about the TCP/IP Stack tuning possibilities in Windows 7/Vista/2008.
NDT Protocol Documented
A description of the protocol used by the NDT
tool has recently been written up
. Check this out if you want to implement a new client (or server), or if you simply want to understand the mechanisms.
- 02 Aug 2011
What does the "+1" mean?
I would like to experiment with social web techniques, so I have added a (Google) "+1" button to the template for viewing PERT KB topics. It allows people to publicly share interesting Web pages. Please share what you think about this via the SocialWebExperiment
- 02 Jul 2011
project has released its first code in May 2011. If you are interested in this followup project of the incredibly useful web100
, check out their site. I have added a short summary on the project to the WebTenG
- 30 Jun 2011
FCC Open Internet Apps Challenge - Vote for Measurement Tools by 15 July
The U.S. Federal Communications Commission (FCC) is currently holding a challenge for applications that can help assess the "openness" of Internet access offerings. There's a page on
challenge.gov where people can vote
for their favorite tool. A couple of candidate applications are familiar to our community, for example NDT
and NPAD. But there are some new ones that look interesting. Some applications are specific for mobile data networks ("3G" etc.). There are eight submissions - be sure to check them out. Voting
is possible until 15 July 2011.
- 29 Jun 2011
Catching up with the
mailing list, I noticed an announcement by Matt Mathis
(formerly PSC, now at Google) from last September (yes, I'm a bit behind with my mail reading :-): A follow-on project called Web10G
has received funding from the NSF. I'm all excited about this because Web100 produced so many influential results. So congratulations to the proposers, good luck for the new project, and let's see what Web10G
- 25 Mar 2011
We held another successful training event
in November, with 17 attendees from various NRENs including some countries that have joined GÉANT recently, or are in the process of doing so. The program was based on the one used for the workshops held in 2008
. But this time we added some case studies, where the instructors walked through some actual cases they had encountered in their PERT work, and at many points asked the audience for their interpretation of the symptoms seen so far, and for suggestions on what to do next. Thanks to the active participation of several attendees, this interactive part turned out to be both enjoyable and instructive, and was well received by the audience. Program and slides are available on the PERT Training Workshop page
- 18 Dec 2010
Efforts to increase TCP's initial congestion window (updated)
At the 78th IETF meeting
in Maastricht this July, one of the many topics discussed there was a proposal to further increase TCP's initial congestion window, possibly to something as big as ten maximum-size segments (10 MSS). This caused me to notice that the PERT KB was missing a topic on TCP's initial congestion window, so I created one.
A presentation by Matt Mathis on the topic is scheduled for Friday's ICCRG meeting
. The slides, as well as some other materials and minutes
, can be found on the IETF Proceedings page. Edited to add:
Around IETF 79 in November 2010, the discussion on the initial window picked up steam, and there are now three different proposals in the form of Internet-Drafts. I have updated the TcpInitialWindow
topic to briefly describe these.
- 28 Jul 2010 - 09 Dec 2010
PERT meeting at TNC 2010
We held a PERT meeting
on Sunday 30 May (1400-1730), just before the official start of the TNC 2010 conference in Vilnius. The attendees discussed technical and organizational issues facing PERTs in National Research and Education Networks (NRENs), large campus networks, and supporting network-intensive projects such as the multi-national research efforts in (Radio-) Astronomy, Particle Physics, or Grid/Cloud research. Slides are available on TNC2010 website here
- 15 Jun 2010
Web100 Project Re-Opening Soon?
In a mail to the ndt-users list
, Matt Mathis has issued a call for input from people who use Web100
, as part of NDT
or otherwise. If you use this, please send Matt an e-mail. There's a possibility that the project will be re-opened "for additional development and some bug fixes".
- 20 Feb 2010
ICSI releases Netalyzr Internet connectivity tester
The International Computer Science Institute (ICSI) at Berkeley has released an awesome new java applet called Netalyzr
which will let you do a whole bunch of connectivity tests. A very nice tool to get information about your Internet connectivity, to see if your provider blocks ports, your DNS works properly, and much more. Read about it on our page here
or go directly to their homepage
- 18 Jan 2010