Attendees
Anjum, Raja, Les. Umar will be late in joining due to Ramadan.
General
Arshad visited SLAC on the 9th July. We crafted a letter to the HEC chairman to see if we can get our proposal moving. It was sent to Dr. Javaid Laghari 7/25/2012.
Joun's contract has expired, most likely Joun will not continue.
Imdad used to help Amber with reports. He has got a fully funded PhD offer from UNSW Australia and shall soon be proceeding abroad.
PingER
Les gave the opening talk on PingER: getting a lot from a simple utility, at the Summer 2012 Joint Techs, Stanford CA, July 16, 2012.
There was a meeting with UNIMAS on July 5, 2012. They are going to add many Malaysian hosts to their <HostList> in the pinger.xml file so they will have a better idea of connectivity within Malaysia. The minutes are here.
HEC Report - Anjum, Amber and Imdad
Amber was working on this report. Amber should skip the missing months and put together a report fro July. If Amber cannot do it, then Anjum will.
Pakistani Hosts
Anjum recommended removing monitor status from GIKI and UAAR. Les has done this at SLAC. LSE has some security issues. Anjum is investigating. He will also investigate the other monitors.
FSBD POP has high unreachability values, which is not acceptable. They are looking into it. Backhaul network is currently leased from PTCL however in 3-4 months they will replace it with their own network. There would be no commercial traffic on it. As a result it is expected that RTT and losses will improve drastically. So next 6 months are important for observing the network performance.
TULIP
Raja was able to successfully obtain the coordinates for several input files using all three methods i.e. (Speed of internet, Speed of light and CBI best fit). He has access to all the codes. Currently he is going through the Matlab codes and following Mathematica tutorials; this will enable him to transfer the current code to Mathematica. Before this he was not familiar with Mathematica.
He has obtained the results using the existing codes on the SEECS Server. He will modify the code after he has successfully replicated it in Mathematica. He plans to have some of the code working in a week or so.
To aid in understanding Raja requested to get a copy of the reflector.cgi source code. Following the last meeting Les sent him reflector.cgi, reflex.cgi and EventHandler.pm
Raja has added the coordinates for the landmark modes given in sites.xml or www-wanmon.slac.stanford.edu/cgi-wrap/reflector.cgi?function=landmarks and plotted distance for them. However most of the Remote nodes are not in sites.xml. Les has sent him nodes.cf that is used by pingtable.pl and has the remote node locations too to use as passive landmarks.
Another interesting study would be whether using different alphas (in distance[km]=alpha*min_RTT[ms]*100[km/ms]) based on the alphas found in PingER for the various regions (see for example http://www-wanmon.slac.stanford.edu/cgi-wrap/pingtable.pl?file=alpha&by=by-node&size=100&tick=daily&year=2012&month=03&from=United+States&to=United+States&ex=none&only=all&dataset=new&percentage=any) provides much benefit compared to the single current value of alpha. Also is there a correlation of alpha vs min RTT values
Raja has start on this study when he is not busy with the Mathematica conversion.
Possible projects
Future meeting time - Les
Normal next meeting would be on Wednesday 1st August, 2012 at 8pm in US and Thursday 2nd August, 2012 at 8am in Pakistan. Les will be on vacation from 4th August until 18th August. He will not have Internet access.