[00:18:33] DemiMarie: varnish and the backend (ats) are located on the same host, and they communicate directly through unix socket [00:18:47] fabfur: gotcha [00:19:04] what advantages does Varnish have over ATS? [00:20:50] different purposes, varnish has a powerful language to express rules and manipulate headers, and it's solely in memory, ATS instead uses mainly disk cache, and it leverages the raw-formatted disk to store and retrieve effectively cache objects [00:21:35] Can ATS do in-memory caching? [00:21:58] so they are different cache layers, varnish has less "space" than ATS but it's fast, ATS is slower but it can store more objects [00:22:09] yes, it can also do that [00:22:11] I thought that WMF used a distributed disk cache to spread the storage over many machines. [00:22:22] I find it interesting that that is not the case. [00:23:14] we did, now we prefer to have all requests from single host on the same host, so completely stacked [00:24:07] does that reduce cache hit rates? [00:26:07] you can find more information here https://phabricator.wikimedia.org/T288106 [00:26:10] I have to go sorry [01:15:48] 06Traffic, 10Infrastructure Security, 06Privacy Engineering, 06Wikipedia-Android-App-Backlog, and 2 others: Integrate In-App Internet censorship circumvention by domain fronting - https://phabricator.wikimedia.org/T327286#10735665 (10Naruse_shiroha) Do learn what the Deep Packet Inspection (DPI) is first,... [04:57:09] FIRING: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [05:02:09] RESOLVED: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [05:19:40] FIRING: [8x] VarnishHighThreadCount: Varnish's thread count on cp5017:0 is high - https://wikitech.wikimedia.org/wiki/Varnish - https://alerts.wikimedia.org/?q=alertname%3DVarnishHighThreadCount [05:29:40] FIRING: [9x] VarnishHighThreadCount: Varnish's thread count on cp5017:0 is high - https://wikitech.wikimedia.org/wiki/Varnish - https://alerts.wikimedia.org/?q=alertname%3DVarnishHighThreadCount [05:34:40] FIRING: [16x] VarnishHighThreadCount: Varnish's thread count on cp5017:0 is high - https://wikitech.wikimedia.org/wiki/Varnish - https://alerts.wikimedia.org/?q=alertname%3DVarnishHighThreadCount [05:49:40] FIRING: [9x] VarnishHighThreadCount: Varnish's thread count on cp5017:0 is high - https://wikitech.wikimedia.org/wiki/Varnish - https://alerts.wikimedia.org/?q=alertname%3DVarnishHighThreadCount [05:54:40] RESOLVED: [8x] VarnishHighThreadCount: Varnish's thread count on cp5017:0 is high - https://wikitech.wikimedia.org/wiki/Varnish - https://alerts.wikimedia.org/?q=alertname%3DVarnishHighThreadCount [08:42:09] FIRING: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [08:47:09] RESOLVED: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [12:24:48] 10Wikimedia-Apache-configuration, 10DNS: Unconfigured subdomains of wikimedia.org should display an error page rather than the wikimedia.org homepage - https://phabricator.wikimedia.org/T391016#10735941 (10Aklapper) [13:04:09] FIRING: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [13:19:09] RESOLVED: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [13:33:21] 10netops, 06DC-Ops, 06Infrastructure-Foundations, 10ops-codfw, 06SRE: Install and cable Nokia test devices and test servers in codfw - https://phabricator.wikimedia.org/T385217#10735989 (10cmooney) a:05Jhancock.wm→03None [19:04:09] FIRING: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX [19:09:09] RESOLVED: LVSHighRX: Excessive RX traffic on lvs2013:9100 (eno12399np0) - https://bit.ly/wmf-lvsrx - https://grafana.wikimedia.org/d/000000377/host-overview?orgId=1&var-server=lvs2013 - https://alerts.wikimedia.org/?q=alertname%3DLVSHighRX