Difference between pages "Package:Valgrind" and "Package:Varnish"

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{{Ebuild
{{Ebuild
|Summary=An Open Source memory debugger for GNU/Linux.
|Summary=Varnish is a state-of-the-art, high-performance HTTP accelerator
|CatPkg=dev-util/valgrind
|CatPkg=www-servers/varnish
|Maintainer=
|Maintainer=
|Homepage=http://www.valgrind.org
}}
}}
__TOC__
'''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 {{Package|www-servers/varnish}}:
<console>###i## emerge www-servers/varnish</console>
==Configuration==
Configuration is controlled by /etc/varnish/default.vcl & /etc/conf.d/varnishd
{{file|name=/etc/varnish/default.vcl|desc=varnish configuration file|body=
vcl 4.0;
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}
}}
{{file|name=/etc/conf.d/varnishd|desc=varnish configuration file|body=
VARNISHD="/usr/sbin/varnishd"
VARNISHADM="/usr/bin/varnishadm"
CONFIGFILE="/etc/varnish/default.vcl"
VARNISHD_OPTS="-a 127.0.0.1:80"
VARNISHD_OPTS="${VARNISHD_OPTS} -u varnish -g varnish"
}}
Varnish will fetch data from localhost:8080 and serve accelerated proxy data on localhost:80
== BootService ==
To start varnish immediately:
<console>###i## rc-service varnishd start</console>
To start varnish at boot:
<console>###i## rc-update add varnishd default</console>
== Verification ==
To verify that your traffic is going through varnish.
<console>$##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:Daemons]]


{{PageNeedsUpdates}}
{{EbuildFooter}}
{{EbuildFooter}}

Revision as of 22:09, September 12, 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 # emerge www-servers/varnish

Configuration

Configuration is controlled by /etc/varnish/default.vcl & /etc/conf.d/varnishd

   /etc/varnish/default.vcl - varnish configuration file
vcl 4.0;
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}
   /etc/conf.d/varnishd - varnish configuration file
VARNISHD="/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)