Magento High Performance Stack
Debian is probably the most stable and trusted linux distribution. The system comes with over 29000 different pieces of software. Only distribution designed to be upgraded without re-installing.
NGINX is a high performance edge web server with the lowest memory footprint. It's Ultra-Fast, highly scalable and very reliable. 10x times faster than Apache!
We use PHP with PHP-FPM (FastCGI Process Manager). PHP-FPM is alternative PHP FastCGI implementation with some additional features, especially busier sites.
Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x.
Redis is an advanced key-value memory store with full cache tag support. For magento it's the fastest cache backend which provides superior performance.
Special MySQL Version with the xtraDb storage engine which is up to 270% faster and more stable and consistent than standard MySQL Version.