Use this pattern when authentication is required for participation in a community. Forms of participation include (but are not limited to) comments, votes, ratings, tags, posts to blogs or forums, and so on.

(tags: ydn yahoo signup patterns design)

(tags: videos video talks rubyonrails ruby ror railsconf rubyhoedown towatch)

The Grid Appliance is a self-configuring Virtual Machine appliance that is used to create ad-hoc pools of computer resources both within a local-area and across wide-area networks to execute high-throughput, long-running jobs.

(tags: virtualization software grid distributed cluster condor parallel mapreduce linux hadoop opensource p2p appliance)

The purpose of this tutorial is to introduce you to the usage of the an extension of the Grid appliance which integrates the Hadoop file system and map/reduce framework for data-intensive parallel computing.

(tags: hadoop grid distributed appliance tutorial)