[log in to unmask]">
If I look at our some workernodes (which is where the NAT traffic is coming from I see in the logs line like)
Feb 26 03:01:03 cn201 cvmfs2: (cms-ib.cern.ch) switching host from http://cvmfs-stratum-one.cern.ch/opt/cms-ib to http://cernvmfs.gridpp.rl.ac.uk/opt/cms-ib (reset host)
Feb 26 03:01:03 cn201 cvmfs2: (cms-ib.cern.ch) switching host from http://cernvmfs.gridpp.rl.ac.uk/opt/cms-ib to http://cvmfs-stratum-one.cern.ch/opt/cms-ib
Feb 26 03:03:03 cn201 cvmfs2: (cms-ib.cern.ch) switched to catalog revision 180975
Feb 26 03:08:05 cn201 cvmfs2: (cms-ib.cern.ch) switched to catalog revision 180977
Feb 26 03:18:03 cn201 cvmfs2: (cms-ib.cern.ch) switched to catalog revision 180981
Feb 26 03:23:04 cn201 cvmfs2: (cms-ib.cern.ch) switched to catalog revision 180983
Feb 26 03:31:04 cn201 cvmfs2: (cms-ib.cern.ch) switching host from http://cvmfs-stratum-one.cern.ch/opt/cms-ib to http://cernvmfs.gridpp.rl.ac.uk/opt/cms-ib (reset host)
Feb 26 03:31:13 cn201 cvmfs2: (cms-ib.cern.ch) switching host from http://cernvmfs.gridpp.rl.ac.uk/opt/cms-ib to http://cvmfs-stratum-one.cern.ch/opt/cms-ib
Look like it's trying to access RAL then switches back to cern.
As far as i can tell our non CMS cvmfs traffic is using the local squids (but we don't normally running so much cms work so this might be an exceptional).
* Dr Daniel Traynor, Grid cluster system manager
* Tel +44(0)20 7882 6560, Particle Physics,QMUL
________________________________________
From: Testbed Support for GridPP member institutes <[log in to unmask]> on behalf of Alessandra Forti <[log in to unmask]>
Sent: 26 February 2020 09:10
To: [log in to unmask]
Subject: Re: Frontier squids in the UK
Hi Dan,
the problem is not the activity, is that the WNs shouldn't access CERN. The UK is doing so disproportionately.
[cid:part1.19C41B5F.4722DEFB@cern.ch]
On 26/02/2020 09:06, Daniel Traynor wrote:
At QM we updated to frontier-squid-4.10-2.1.x86_64 on the 14th Feb. Internally I don't see any difference in behaviour/ performance of the squids before or after the update.
I see both our NATs our listed near the top list but that's probable related to the large amount of CMS we doing at the moment.
dan
* Dr Daniel Traynor, Grid cluster system manager
* Tel +44(0)20 7882 6560, Particle Physics,QMUL
________________________________________
From: Testbed Support for GridPP member institutes <[log in to unmask]><mailto:[log in to unmask]> on behalf of Alessandra Forti <[log in to unmask]><mailto:[log in to unmask]>
Sent: 26 February 2020 08:15
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Frontier squids in the UK
Hi,
it seems there is a problem with the UK sites WNs accessing frontier
squid. In particular Manchester, RAL, RALPP and Oxford the others tooo
but they are behind a NAT and not as many nodes appear in the list.
https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwlcg-squid-monitor.cern.ch%2Fawstats%2Fbin%2Fawstats.pl%3Fconfig%3Dcvmfsbproxy.cern.ch%26databasebreak%3Dday%26day%3D25&data=02%7C01%7C%7Cebdecf99190248c3600a08d7ba941a8f%7C569df091b01340e386eebd9cb9e25814%7C0%7C0%7C637183017572955219&sdata=tri9QzQT0sN%2BJAO1jlmf0X21X3yQ%2Bo%2BTdTnD%2BEVcZhM%3D&reserved=0<https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwlcg-squid-monitor.cern.ch%2Fawstats%2Fbin%2Fawstats.pl%3Fconfig%3Dcvmfsbproxy.cern.ch%26databasebreak%3Dday%26day%3D25&data=02%7C01%7C%7Cd4aa7154bfeb4660e3db08d7ba9bdc21%7C569df091b01340e386eebd9cb9e25814%7C0%7C0%7C637183050884940544&sdata=uUXYXuha6GUG8cn%2FEs2a0Gyx13tQbAKvkG86U%2Fe9oy0%3D&reserved=0>
you need to filter for ac.uk
Can I ask what version of squid you are using and if you are using
frontier squid or standard OS squid?
Frontier changed the baseline from 3.5.28 to 4.10.1-1 two weeks ago
which is not even available on centos8.
thanks
cheers
alessandra
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Respect is a rational process. \\//
For Ur-Fascism, disagreement is treason. (U. Eco)
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Inference: a conclusion reached on the basis of evidence and reasoning
Respect is a rational process. \\//
For Ur-Fascism, disagreement is treason. (U. Eco)
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