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Difference between revisions of "Package:Varnish"
Threesixes (talk | contribs) m (update since package had broken previous configuration syntax, and setup.) |
Threesixes (talk | contribs) (add apache benchmarking) |
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To verify that your traffic is going through varnish. | To verify that your traffic is going through varnish. | ||
<console>$##i## curl -I https://www.varnish-cache.org/</console> | <console>$##i## curl -I https://www.varnish-cache.org/</console> | ||
== Benchmarking == | |||
If your system has apache installed apache benchmark can show the power of varnish. The examples shown are running 500 requests with concurrency of 100 hits. | |||
ab against a 3 worker cluster mode puma server | |||
<console>###i## ab -n 500 -c 100 http://127.0.0.1:3000/index.html | grep Request</console> | |||
Requests per second: 110.92 [#/sec] (mean) | |||
ab against the same server served through varnish | |||
<console>###i## ab -n 500 -c 100 http://127.0.0.1/index.html | grep Request</console> | |||
Requests per second: 10268.42 [#/sec] (mean) | |||
[[Category:Server]] | [[Category:Server]] | ||
Revision as of 19:24, August 23, 2014
Varnish
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Varnish is a webcache & http accelerator. Varnish will either serve cached content, or retireve content from the server, and cache it. Varnish will reduce I/O pressure from webservers.
Install
Emerge
Install www-servers/varnish
root # www-servers/varnish
Configuration
Configuration is controlled by /etc/varnish/default.vcl & /etc/conf.d/varnishd
/etc/varnish/default.vcl - varnish configuration filevcl 4.0;
backend default {
.host = "127.0.0.1";
.port = "8080";
}
/etc/conf.d/varnishd - varnish configuration fileVARNISHD="/usr/sbin/varnishd"
VARNISHADM="/usr/bin/varnishadm"
CONFIGFILE="/etc/varnish/default.vcl"
VARNISHD_OPTS="-a 127.0.0.1:80"
VARNISHD_OPTS="${VARNISHD_OPTS} -u varnish -g varnish"
Varnish will fetch data from localhost:8080 and serve accelerated proxy data on localhost:80
BootService
To start varnish immediately:
root # rc-service varnishd start
To start varnish at boot:
root # rc-update add varnishd default
Verification
To verify that your traffic is going through varnish.
user $ curl -I https://www.varnish-cache.org/
Benchmarking
If your system has apache installed apache benchmark can show the power of varnish. The examples shown are running 500 requests with concurrency of 100 hits.
ab against a 3 worker cluster mode puma server
root # ab -n 500 -c 100 http://127.0.0.1:3000/index.html | grep Request
Requests per second: 110.92 [#/sec] (mean)
ab against the same server served through varnish
root # ab -n 500 -c 100 http://127.0.0.1/index.html | grep Request
Requests per second: 10268.42 [#/sec] (mean)