CloudAustin's April meeting will feature RC Johnson of WPEngine speaking on "Scaling on Open Source for Fun and Profit." It will cover:
• Evaluating open source for it's strengths and weaknesses will talk about using XDebug the PHP debugger, as well as Nginx, Varnish, & Memcached.
• Graphite and statsd to manage, in cooperation with Zabbix, the volumes of data you get from hundreds or thousands of servers.
• Technologies we've broken and had to wrap in such a way to scale successfully. Pingdom, Github, and others. Also, can cover things like Amazon SQS, Bittorrent for deployments, and Ansible for configuration management.