Varnish Caching

Varnish CacheClever Software for Making HTTP Applications FasterRefresh Cambridge 6th July 2011gareth rushgrove | morethanseven.net http://www.ﬂickr.com/photos/jkannenberg/541059011

Gareth Rushgrovegareth rushgrove | morethanseven.net

Work at freeagentcentral.comgareth rushgrove | morethanseven.net

Blog at morethanseven.netgareth rushgrove | morethanseven.net

Currate devopsweekly.comgareth rushgrove | morethanseven.net

www.varnish-cache.orggareth rushgrove | morethanseven.net

“Varnish Cache is an open source, state of the art web application accelerator. You install it on your web server and it makes your website fly. Official blurbWhat is Varnish?gareth rushgrove | morethanseven.net http://www.flickr.com/photos/exalthim/3597210568

- Cache- Reverse Proxy- HTTP AcceleratorSeriously, what is Varnish?gareth rushgrove | morethanseven.net

A Story of HTTP Cachinggareth rushgrove | morethanseven.net http://www.ﬂickr.com/photos/solsken/62924477

Database Web Server Web TrafﬁcA Typical Appgareth rushgrove | morethanseven.net

Database Web ServerMore Trafﬁc == Slower responsesgareth rushgrove | morethanseven.net

Database Web ServerEventually...gareth rushgrove | morethanseven.net

Database Web Server VarnishAdd Varnishgareth rushgrove | morethanseven.net

Database Web Server VarnishDeal with more trafﬁcgareth rushgrove | morethanseven.net

An Examplegareth rushgrove | morethanseven.net http://www.ﬂickr.com/photos/jonrb/3735816042

www.vagrantbox.esgareth rushgrove | morethanseven.net

memcached Gunicorn Varnish Nginx Database memcached Gunicorn Varnish NginxOverengineering for Fun

backend default { .host = "127.0.0.1"; .port = "8000"; } sub vcl_recv { if (req.request == "GET" && req.http.cookie) { return(lookup); } } sub vcl_fetch { if (beresp.ttl < 180s) { set beresp.ttl = 180s; } esi; if (beresp.http.Set-Cookie) { return(deliver); } }Varnish Conﬁgurationgareth rushgrove | morethanseven.net

⚡ ab -c 10 -n 400 http://www.vagrantbox.es/ Requests per second: 59.63 [#/sec] (mean) Percentage of the requests served within a certain time (ms) 50% 164 66% 174 75% 183 80% 188 90% 207 95% 231 98% 246 99% 279 100% 408 (longest request)Without Varnishgareth rushgrove | morethanseven.net

⚡ ab -c 10 -n 400 http://www.vagrantbox.es/ Requests per second: 103.61 [#/sec] (mean) Percentage of the requests served within a certain time (ms) 50% 92 66% 101 75% 107 80% 111 90% 120 95% 129 98% 141 99% 149 100% 157 (longest request)With Varnishgareth rushgrove | morethanseven.net

Questions?gareth rushgrove | morethanseven.net http://ﬂickr.com/photos/psd/102332391/

http://www.morethanseven.net	286
http://morethanseven.net	206
http://lanyrd.com	59
http://londondevops.org	40
url_unknown	8
http://www.slideshare.net	6
http://www.newsblur.com	4
http://localhost	2
http://www.hanrss.com	1
http://feeds.feedburner.com	1

Varnish Caching

by Gareth Rushgrove on Jul 07, 2011

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