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Traceroute/ping servers - Les

As of 6/16/2016 202.12.103.7 the PingER MA and traceroute host was unpingable from SLAC

http://202.12.103.71/cgi-bin/traceroute.pl  gives “the web page below:

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  • A method is being tested where Perl is compiled on Android and pinger2.pl involving Root access and Busybox installation
  • Another method of modifying the output from the standard ping command is also being worked on
  • There have been some irregularities in the output saved on the device running the app mentioned on github. Both the data and a few noted irregularities have been attached
  • It has also been noted that the standard Notepad provided on Windows machines is not ideal for viewing such data (using something like gVim, 010 Editor, EmEditor, etc would be better)
  • Regex Patterns have been tried to capture appropriate values from a given string. There is a  document containing these patterns.

  • Parsing of output of ping commands has been attempted. The ideal case conversion of the command "ping -s 100 -c 10 yahoo.com" results in the following. Please acknowledge if it is in the correct format. More information is in the document titled "Basic Ping Output Conversion.docx"  

    Code Block
    $ ping -s 100 -c 10 yahoo.com
PING yahoo.com (98.139.183.24) 100(128) bytes of data.
[1461422353.807137] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=1 ttl=52 time=254 ms
[1461422354.756784] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=2 ttl=52 time=253 ms
[1461422355.759227] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=3 ttl=52 time=254 ms
[1461422356.760669] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=4 ttl=52 time=254 ms
[1461422357.761238] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=5 ttl=52 time=253 ms
[1461422358.763935] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=6 ttl=52 time=254 ms
[1461422359.764643] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=7 ttl=52 time=253 ms
[1461422360.766194] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=8 ttl=52 time=253 ms
[1461422361.768163] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=9 ttl=52 time=253 ms
[1461422362.769090] 108 bytes from ir2.fp.vip.bf1.yahoo.com (98.139.183.24): icmp_seq=10 ttl=52 time=254 ms
--- yahoo.com ping statistics ---
 10 packets transmitted, 10 received, 0% packet loss, time 9013ms
rtt min/avg/max/mdev = 253.745/254.076/254.636/0.387 ms

Scope Overview of PingER Linked Open Data (LOD) and Web Observatory - Bebo

See here.

Other Projects

Action items:

Next Meeting

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Old Information

Work in Pakistan placed here 6/16/2016

See here. Also see the notes from the the meeting on PingER/Android with  with Sara and Saqib in Pakistan who are working on this.

They have put together an app written in java that can take a list of hosts and make a set of pings to each in turn. The output appears as:

Pinger2.pl uses the standard Linux ping to make up to 30 pings stopping when it has received 10 responses, so the ping command will need modifying (hopefully there is a java ping option to support this). In addition the output will need to be parsed to produce the pinger2.pl output format. It may be easier to take the pinger2.pl code and run a it under a perl interpreter. This is the approach Sara is taking in Pakistan. They will examine this. If they find serious problems they will communicate that so it can be shared with Sara. Also they will need to check the pinger2.pl documentation to ensure that a java version does the exactly same thing and has the same features.

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Apart from this they will look at putting together a proxy that the Android can send the recent data to. Then the SLAC archive site can gather the data from the proxy. The proxy could be replicated at a second site for high availability. Depending on reliability the android should preserve a cache of the most recent data so it can be re-sent later. The least recently used data can be flushed asynchronously.

Scope Overview of PingER Linked Open Data (LOD) and Web Observatory - Bebo

See here.

Other Projects

Action items:

Next Meeting

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Student availability

There are two students (Jahin and Ankit Singh)  will be at at the University of Florida who have F1 US visas and will finish at Florida in the 1st week in May. They are then free to come directly to SLAC. They will then continue their studies in the US in August 2016, hence they will be available at SLAC for ~ 3 months. Low cost housing could be an issue. Most of the other students are BTech students at Amity who will graduate in May.  Once we have their names and mutual interest we can start the paper work to get started on invitations. Aditya Pan and Anwesha Mal who graduate in May with a BTech are going to the National University of Singapore. (I am unsure if this  means they are going to University of Singapore after they graduate in May, or before then. Are they candidates to come to SLAC?)

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