Highload 'puppet'.

 Awesome article about howto setup high-load puppet server for large environmets. Yes this is article on russian, my appologies. :)

Badoo experience with puppet

Chef search function update

Good feature i think, now chef search could return not whole node or nodes as result, but only needed index or indexes. Seems that big parallel deployments will not highly load solr.

Introducing Partial Search for Opscode Hosted Chef