Minutes for SLAC SEECS Meeting March 6th, 2012

General

We may not be able to get the MATLAB Toolkit for Tulip. Dr. Anjum proposed that we can use Mathemetica instead of MATLAB. He also proposed that he will try to find out some MS students who might take this conversion as his MS thesis. Students have to finalize their thesis by 6th April. By the second week of April, we will get to know if we have any student doing this.

Bilal and Dr. Anjum were unavailable this week, pre-informed. Ghulam did not show up. 

IPV6 - Anjum and Ghulam (this has been de-prioritized until new database PingER is working)

Les has the passwords for monitor and the IPv6 host at SEECS. He has successfully logged on.

Les looked at pinger2.pl, it verifies the address is IPv4 4 octets. In addition one will need a copy of pinger.xml with IPv6 hosts and their addresses. There are 2 subroutines in traceroute.pl that may be useful in making pinger2.pl support IPv6. They are valid_ip and gethostbyname6.

Next we need to make pingtable.pl and getdata.pl IPV6 capable, again this could use the 2 subroutines. Since Ghulam and Sadia are working on these it would be good for them to add this.

pinger2.pl

Joun has installed the latest version  pinger2.pl that is not supposed to lose <BeaconsList> at 3 sites (cae.seecs.edu.pk, maggie2.seecs.edu.pk, aup.seecs.edu.pk). A month later (march 7, 2012) after install the <BeaconsList> appears OK on all three, i.e. for the <LastChecked> variable showed march 1st, 2012 for aup.seecs.edu.pk and maggie2.seecs.edu.pk, and showed March 7th, 2012 for cae.seecs.edu.pk. Joun may want to extend the deployment of the new pinger2.pl.

PingER Updates

HEC Report - Anjum, Amber and Imdad

The report is in Case studies at https://confluence.slac.stanford.edu/display/IEPM/PERN+Six+Monthly+Report+%28June+2011-+November+2011%29.

Imdadullah will be writing an executive summary of the report which needs to be submitted before the end of this month. Now the report goes to other universities as well as to the head of HEC. We now need to be very careful in writing the report.

The report was supposed to be submitted last monday. A few changes were made in the conclusions and an executive summary. We wait till next meeting for updates.

Pakistani Host

Joun and Ghulam have arranged to archive the status of Pakistani hosts in http://pinger.seecs.edu.pk/daily-report. There is a link from the PingER web site (http://www-iepm.slac.stanford.edu/pinger/site.html)

The IPs which start with 111.68.96.xxx are routed in such a way that the data can go out but it cannot come back to Pakistan. They will change the IP of all POP nodes. This arrangement was done for NCP. Only 0.5 MB of that link is provided to other universities. Any node that is having the IP as 111.68.96.xxx will be given a new IP.

There were 12 nodes with this problem which will be solved in the next week. SEECS will give them the IP addresses, and then HEC will change the IP of these nodes.

FSBD and MTN POP have 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.

SEECS have not heard about the IP change from HEC. Dr Anjum will remind HEC about the IP changes to be made by the end of last week. We wait till nest week for updates.

PingER Archive Site - Ghulam 

Current Schema : see here.

Ghulam will modify the script to gather data half an hourly and put the analyze data in a separate table.

Sadia is working on getdata.pl to shift the data from SLAC files to database.

Future concerns:(Will be considered once  the performance of above monthly aggregated data is observed)

  1. How to store raw data for one year
  2. How should it be sharded
  3. For how long data should be in database

Sadia :Adding max RTT and Alpha to pingtable.pl and the analyze scripts 

TULIP - Bilal

Bilal will be delivering three tasks in this week ending 3/7/2012:

  1. Trying stress testing with reflector instead of reflex. Results are available at Target Data for reflector tier all. The results also have  a comparison of reflex and reflector error in terms of distance. Repeat this for Europe. 
  2. By the next week Bilal will be submitting report on Australia using reflex. He will also try reflector for Europe. Australia report using reflex can be found at: https://confluence.slac.stanford.edu/display/IEPM/Stress+Testing+for+Australia
    1. Bilal needs to add the number of landmarks in the region for the EXcel Spreadsheet. This will be useful for his paper, i.e. reporting typical accuracy as a function of landmarks in region.
  3. Bilal will be sending the tulip draft paper by the end of February. 

It appears Sadia is right about SLAC needing to spend ~ $4K to get the full toolkit needed by CBG. Thus we will not implement at SLAC. Sadia will make sure TULIP art SLAC works for TULUP without CBG. Progress

Bilal will rerun the stress testing of North America using new reflex.

Bilal is writing a report with stress testing results of all of the regions. He will be sharing it when it completes.

With the upgrading of the pinger.slac.stanford.edu host from RHEL4  to RHEL6 the mysql databases got lost. Sadia has worked with Fahad to recover the Tulip data base from the recovered sites.xml file. This is almost done.

Possible projects

Future meeting time - Les

  1. Next meeting on Tuesday 13th March, 2012 at 8:00 pm in US and Wednesday 14th March, 2012 at 9:00am in Pakistan.