[log in to unmask]"> I agree I have similar lines but we don't run CMS. It does that for all repos
Feb 26 09:08:21 wn1905250 cvmfs2: (clicdp.cern.ch) switching proxy from http://195.194.104.1:3128 to http://195.194.104.2:3128 (reset load-balanced proxies)
Feb 26 09:08:21 wn1905250 cvmfs2: (clicdp.cern.ch) switching host from http://cvmfs-stratum-one.cern.ch:8000/cvmfs/clicdp.cern.ch to http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/clicdp.cern.ch (reset host)
Feb 26 09:08:21 wn1905250 cvmfs2: (clicdp.cern.ch) switching host from http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/clicdp.cern.ch to http://cvmfs-stratum-one.cern.ch:8000/cvmfs/clicdp.cern.ch
Feb 26 09:10:02 wn1905250 cvmfs2: (sft-nightlies.cern.ch) switching host from http://cvmfs-stratum-one.cern.ch:8000/cvmfs/sft-nightlies.cern.ch to http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/sft-nightlies.cern.ch (reset host)
Feb 26 09:10:02 wn1905250 cvmfs2: (sft-nightlies.cern.ch) switching host from http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/sft-nightlies.cern.ch to http://cvmfs-stratum-one.cern.ch:8000/cvmfs/sft-nightlies.cern.ch
Feb 26 09:11:45 wn1905250 cvmfs2: (lhcbdev.cern.ch) switched to catalog revision 732206
Feb 26 09:15:05 wn1905250 cvmfs2: (atlas.cern.ch) switched to catalog revision 60818
Feb 26 09:17:01 wn1905250 cvmfs2: (lhcbdev.cern.ch) switched to catalog revision 732210
Feb 26 09:20:20 wn1905250 cvmfs2: (cms.cern.ch) switched to catalog revision 88926
Feb 26 09:25:01 wn1905250 cvmfs2: (lhcbdev.cern.ch) switching host from http://cvmfs-stratum-one.cern.ch:8000/cvmfs/lhcbdev.cern.ch to http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/lhcbdev.cern.ch (reset host)
Feb 26 09:25:01 wn1905250 cvmfs2: (lhcbdev.cern.ch) switching host from http://cernvmfs.gridpp.rl.ac.uk:8000/cvmfs/lhcbdev.cern.ch to http://cvmfs-stratum-one.cern.ch:8000/cvmfs/lhcbdev.cern.ch
Feb 26 09:26:02 wn1905250 cvmfs2: (lhcbdev.cern.ch) switched to catalog revision 732211
Feb 26 09:31:19 wn1905250 cvmfs2: (lhcbdev.cern.ch) switched to catalog revision 732216
Feb 26 09:36:29 wn1905250 cvmfs2: (lhcbdev.cern.ch) switched to catalog revision 732219
cheers
alessandra
On 26/02/2020 09:24, Daniel Traynor wrote:
[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 -- Inference: a conclusion reached on the basis of evidence and reasoning Respect is a rational process. \\// For Ur-Fascism, disagreement is treason. (U. 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