Varnish is a HTTP accelerator, build from ground up with performance in mind. Varnish is targeted primarily at the FreeBSD 6/7 and Linux 2.6 platforms, and will take full advantage of the virtual memory system and advanced I/O features offered by these operating systems. You can get more information and the software from Varnish site.
http://varnish.projects.linpro.no/
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Tags: scalability, varnish

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WordPress.com use Amazon S3 for storing images, they do not serve images directly from Amazon, they use Varnish reverse proxy at front end, so not all images need to be served from S3, Varnish cache popular images and serve directly from its cache.
Many big web sites use varnish or squid at front end as reverse [...]

Tags: reverse proxy, scalability, squid, varnish

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Many large web sites use reverse proxy servers in front end. For example flicker use squid in reverse proxy mode, wordpress use varnish in front end.
Varnish was written from the ground up to be a high performance caching reverse proxy. Squid is a forward proxy that can be configured as a reverse proxy. Besides – [...]

Tags: cache, reverse proxy, varnish

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