Time & date
This meeting: February 27 2020 9 pm Pacific time; a day later 9:00 am Pakistan time; 9:30 am India time; 12:00 pm Malaysian & Guangzhou time; 11:00 am Thailand time; 6:00 am Jordan and 5:00am Turkey.
Doodle poll invites sent 02/17/2020
Format
New items and updates are in boldface.
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Mailing list: pinger-my@googlegroups.com for membership see https://groups.google.com.
Attendees
Saqib, Umar, Les
Invitees:
Wajahat Hussain, Kiran Liaqat+ (SEECS), Saqib+ (UAF), Bebo White+, Umar Kalim+, Les Cottrell+, Johari (UNIMAS); Adib (Turkey), Dr. Charnsak Srisawatsakul (Ubru), Eyad Ayoubi (Turkey), Baraa Muslmani ( Jordan), Dr. Shadi Jawarneh (Jordan)
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Wajahat is recovering from numerous infections, starting to visit office once again (2/17/2020)
Actual Attendees
Bebo, Saqib, Umar, Les
Use of Zoom
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Saqib registered a DNS name for GC Women University Faisalabad. The new URL is http://pinger.gcwuf.edu.pk/cgi-bin/ping_data.pl.
Previously there was no DNS name so the name was reported as 121.52.153.227. This required a change in the <SrcName> in pinger.xml and exposed a bug in ping_data.pl which has been fixed in the latest release (4.6).
SLAC (Updated 8/26/2019)
- Les turned on the debugging to investigate the discovery that several analysis scripts had stopped working in November 2019
- Each night we run about 100 analysis scripts as batch jobs and after fixing problems with the mon-lib.pl etc. we still found about 10% were randomly failing.
- After about 4 weeks it eventually transpired that some of the batch machines had not been enabled to access the Oracle database via the firewall. The jobs submitted to those hosts failed.
- The cause of the problem was eventually identified about January 3rd and fixed about January 6th. No data was lost.
- The new version of Linux CentOS7, does not appear to support the following modules that are used by the PingER analysis.
- The Oracle database interface. PingER uses Oracle so there could be a problem.
- The perl statistics module
- I will restrict the PingER analysis jobs to the earlier version of Linux (RHEL6) to avoid these problems. I am working with the systems folks at SLAC and looking into when the current version of Linux at SLAC (RHEL6) will no longer be supported and following SLAC's planning on how or whether to address the issues.
- Rhel6 has full support until Nov 30, 2020. It then goes on "extended" support until June 2024. I expect SLAC will continue to use it during the extended support phase, at least for a couple of years.
- The Oracle database interface. PingER uses Oracle so there could be a problem.
Umar
- Umar did some research and found:
- I did a cursory search and it appears that in addition to having the Oracle database server, we would also need the items listed at the bottom.If I were to test, I'd consider setting up a VirtualBox VM on my laptop and install CentOS7, Oracle database, instant client, Perl, and Perl driver for Oracle and test in the VM. I also searched to see if I could find some reference of "Oracle driver not available for CentOS7", but I couldn't find any.I would recommend testing in an isolated VM so that we don't break the existing setup.1) Oracle instant client2) Oracle DBD - last updated in 7/2019Here is a good breakdown that explains the relevant pieces (ignore the references to MySQL here). With testing we'll be sure what works and what doesn't.May be I am missing something, but I do not understand why there won't be a perl driver for Oracle on CentOS7.
- Umar did some research and found:
Umar
State of MAs.
Host | State | last seen | Status |
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pinger.nchc.org.tw | Intermittent problems starting 11/9/2019, it is not pingable starting 11/12/2019. | ||
pinger.vu.edu.pk | Unable to gather data since 29th August, 2019. The host is pingable. Emailed Wajahat 11/3/2019. Wajahat responded 11/11/2019 "Anything improved?". Les responded they are still not working with more details and suggesting we focus on vu. 11/20/2019 Les asks if there is an update? Wajanat responded 11/20/2019 "These guys are not responding. We are trying to contact them. Already tried multiple times." This just applies to vu. Wajahat recommends we keep trying to gather data. I have turned off the warnings. Kieran fixed it 2/3/2020 by restoring the pinger.xml file following email instructions from Les | 8/28/2019 | Fixed 2/3/2020. |
monitor.seecs.edu.pk | No data since 10/29/2019, host is pingable email to Wajahat 11/7/2019. Reminder to Kieran Kiran and Wajahat 2/16/2020. | 10/27/2019 | |
maggie2.seecs.edu.pk | No data since 11/4/2019, host is pingable email to Wajahat 11/2/2019, 11/20/2019. Reminder to Kieran Kiran and Wajahat 2/16/2020. | ||
pinger.nwfpuet.edu.pk | Something amiss since April 2019 when it dropped from monitoring over 150 targets down to 4. There is nothing in <BeaconsList>, all the hosts it attempts to monitor are in the locally manually maintained <NodeList>. Does not ping by name. Email sent 11/7/2019, and again 11/20/2019. Reminder to Kieran Kiran and Wajahat 2/16/2020. | ||
pingeramity.in | Continues to be unstable. Email 8/29/2019. Turned off email warnings 11/20/2019. |
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Next meeting: There will be a Doodle poll, for 2020 at 10 9 pm Pacific time; a day later 109:00 am Pakistan time; 109:30 am India time; 112:00 pm Malaysian & Guangzhou time; 21:00 pm Thailand time; 76:00 am Jordan time. 65:00am Turkey time.
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Old information
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