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
 
 
}}
 
}}
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__TOC__
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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.
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==Install==
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===Emerge===
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Install {{Package|www-servers/varnish}}:
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<console>###i## emerge www-servers/varnish</console>
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==Configuration==
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Configuration is controlled by /etc/varnish/default.vcl & /etc/conf.d/varnishd
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{{file|name=/etc/varnish/default.vcl|desc=varnish configuration file|body=
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vcl 4.0;
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backend default {
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    .host = "127.0.0.1";
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    .port = "8080";
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}
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}}
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{{file|name=/etc/conf.d/varnishd|desc=varnish configuration file|body=
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VARNISHD="/usr/sbin/varnishd"
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VARNISHADM="/usr/bin/varnishadm"
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CONFIGFILE="/etc/varnish/default.vcl"
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VARNISHD_OPTS="-a 127.0.0.1:80"
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VARNISHD_OPTS="${VARNISHD_OPTS} -u varnish -g varnish"
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}}
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Varnish will fetch data from localhost:8080 and serve accelerated proxy data on localhost:80
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== BootService ==
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To start varnish immediately:
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<console>###i## rc-service varnishd start</console>
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To start varnish at boot:
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<console>###i## rc-update add varnishd default</console>
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== Verification ==
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To verify that your traffic is going through varnish.
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<console>$##i## curl -I https://www.varnish-cache.org/</console>
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== Benchmarking ==
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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.
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 +
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ab against a 3 worker cluster mode puma server
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<console>###i## ab -n 500 -c 100 http://127.0.0.1:3000/index.html | grep Request</console>
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Requests per second:    110.92 [#/sec] (mean)
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 +
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ab against the same server served through varnish
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<console>###i## ab -n 500 -c 100 http://127.0.0.1/index.html | grep Request</console>
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Requests per second:    10268.42 [#/sec] (mean)
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[[Category:Server]]
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[[Category:Daemons]]
  
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{{EbuildFooter}}
 
{{EbuildFooter}}

Latest revision as of 22:09, 12 September 2014

www-servers/varnish


Source Repository:Gentoo Portage Tree

Summary: Varnish is a state-of-the-art, high-performance HTTP accelerator


Varnish

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 Varnish:

# 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:

# rc-service varnishd start

To start varnish at boot:

# rc-update add varnishd default

Verification

To verify that your traffic is going through varnish.

$ 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

# 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

# ab -n 500 -c 100 http://127.0.0.1/index.html | grep Request

Requests per second: 10268.42 [#/sec] (mean)