Check out one of Arpit’s latest posts.
Wikipedia: Extract, transform, load
Wikipedia: Talend Open Studio
Talend Open Studio: Tutorials
richard.gluga.com: Data Migration Done Right
kJube: Vendors and tools – ETL
AlfrescoForge: ETL Connector
High Scalability: How Rackspace Now Uses MapReduce and Hadoop to Query Terabytes of Data
NYTimes: Announcing the Map/Reduce Toolkit
email@example.com: Andreas Kostyrka: Re: hadoop in the ETL process
Re: hadoop in the ETL process
It really is a must read. It follow’s Flickr’s evolution from a game engine to what it is today and why Flickr has made the decisions it has in features and feel. I think it boils down to: “It’s the Users stupid”.