Michael's Tech Blog

Many of you know about LiveJOURNAL. That project has approximately 4 million accounts and nearly 50 million requests per day! So, it’s not trivial task to make fast and establish access for its users. A presentation “Inside LiveJournal’s backend” in PDF format shows you how that task was solved.

There are only Open Source software:

• Database is MySQL claster
• Cache content – memcached
• Mail servers based on postfix
• Web applications use Perl and mod_perl, of course
• Statistics – TUX/thttpd
• Template system – BML
• Distributed File System – MogileFS
• Proxy server and traffic balancer – perlbal
• OS – Debian GNU/Linux, linux 2.4 and 2.6 (without call epoll – for perlbal)