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http://www.badllama.com/content/monitor-varnish-zabbix
Handy little script to monitor varnish stats from zabbix. Awesome.
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https://github.com/varnish/varnish-devicedetect/
Simple regexes to handle device detection within varnish. Includes links to documentation and suggested implementations. Neat.
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http://kly.no/posts/2009_12_08__Varnishstat_for_dummies__.html
Great little article on how to make sense of the varnishstat output.
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http://blog.tonycode.com/tech-stuff/http-notes/making-http-requests-via-telnet
A helpful article on how to make HTTP requests by hand via telnet. Doesn't work by hand for me, only the script approach works. But useful nonetheless.
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http://www.magentocommerce.com/magento-connect/PHOENIX/extension/6322/varnish_cache
The Magento plugin / extension recommended by the Varnish publishers, albeit in a blog post in September 2012.
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https://www.varnish-software.com/blog/doing-right-thing-magento-varnish-cache
Article from Varnish Software about magento plugins, recommends the Phoenix one...
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http://www.zabbix.com/forum/showthread.php?t=25265
A zabbix monitoring script for varnish ported from cacti.
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http://www.cyberciti.biz/faq/custom-nginx-maintenance-page-with-http503/
Article explaining how to create a custom 503 maintenance page and have it served by default in various situations (migrations for example). Very useful.
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http://serverfault.com/questions/330638/forward-my-http-requests-from-my-ip-to-another-server
Forwarding all web traffic from an old to a new server with nginx, includes a sample config for nginx. Useful.
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http://serverfault.com/questions/130185/store-varnish-cache-in-hard-disk
Useful pointers on how to store varnish cache on disk. Very easy, recommends using ext2 and noatime / nodiratime to improve disk throughput. Smart.
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https://github.com/madalinoprea/magneto-varnish/
A magento varnish plugin that enables varnish caching on Magento sites.
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http://wpmu.org/scaling-wordpress-wpmu-buddypress-like-edublogs/
Interesting write up by James at Incsub on how they handle scale on edublogs. Some good advice although a little light on specifics, a good starting point for research.
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http://varnish.projects.linpro.no/
Varnish is a state-of-the-art, high-performance HTTP accelerator (reverse proxy). Varnish is designed by a BSD kernel developer to make full use of BSD / Linux kernel's ability to manage memory. It is extremely fast, up to 10 - 20 times faster than squid.
