Good Blogs

http://generalcsproblems.wordpress.com/os-and-linux-related-problems/

http://www.kegel.com/c10k.html

http://nick-black.com/dankwiki/index.php/Network_servers

http://pl.atyp.us/content/tech/servers.html

About Software Designs...
http://www.developerdotstar.com/mag/articles/reeves_design.html