Improve the performance of your Magento installation thanks to Varnish software. This presentation give you an overview of the knowledge necessary to understand this technology. Presented at Developers Paradise and Meet Magento Germany in 2014

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Sylvain Rayé
Meet Magento Germany 2014

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VARNISH?!!!

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Servers Architecture
Source: http://edoceo.com/howto/nginx-varnish-ssl

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Without Varnish
200 requests / 5 concurrent clients
Result: ~2 req / sec

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With Varnish
200 requests / 5 concurrent clients
Result: ~1400 req / sec

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• The Good
Peak of visitors (Christmas, Sales period, TV show, etc),
low or heavy traffic, grace mode, load balancer, health
check#
• The Bad
SSL, configuration, wrong web server logs, debugging
(web app, varnish), FPC deactivated (EE)#
• The Ugly
Use for static content, hide bad coding practices

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Hey idiot !!
#
Did you mentioned Ivan’s Magento
Performance tweaks from eComDev?!
#
http://bit.ly/1abipgf (Presentation)!
http://bit.ly/1d2nDPz (Module)!
#
Or $product->addAttributeUpdate()!
http://bit.ly/1eIK5fb (in german)!
#
Use OpCode, Redis / Memcached, etc
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HTTP Protocol#
Varnish Configuration#
Web Application

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HTTP Protocol
Source: Varnish Book
Request Response

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HTTP Cache headers
• Expires / Cache-Control
• ETAG / Last-Modified
• If-Modified-Since / If-None-Match
• Vary
• Age

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Configuration
• /etc/default/varnish
#
#
• /etc/varnish/default.vcl
• /usr/bin/varnishadm
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VCL & Routines
Source: http://www.fabrizio-branca.de

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Christmas time!#
Hum, sorry… shopping time!#
#
Your shop is fast now?
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Edge Side Includes
HTML generated from server side
Your VCL should have

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Magento Extensions
• Nexcess Turpentine
• Phoenix Media PageCache
• Aoe_Static (forked by S. Hoyer)
Dammit!!!

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Varnish
or
not Varnish?
#
That’s the
question

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Alternatives
• Full Page Cache of Bubble Code:
http://bit.ly/1kxRUvc
• Lesti FPC: http://bit.ly/1axNMFb
• Litespeed
• HipHop VM (work in progress)

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THANK YOU
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I can do shopping
much faster now

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Links
• Varnish Book
https://www.varnish-software.com/book
• Nexcess Turpentine
http://bit.ly/1cFAIxe
• Phoenix Media PageCache
http://bit.ly/19fYzoQ
• Aoe_Static (forked)
http://bit.ly/19fYNMO

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Copyright - Jeff Dunham
Achmed the dead terrorist
http://www.youtube.com/watch?v=R_jU3FdnNoc