Ask HN: Enterprise sysadmin to high scale web app sysadmin?

[cliffdickerson]

I am a run of the mill enterprise sysadmin. The largest cluster I've ever built was 128 node oracle grid and I've never had to solve a scaling problem more difficult then "add more ram."

I've always been interested in larger systems and with the success and volume of web apps there are more and more 1000 plus server deployments out there. I want to start applying for these types of jobs and was wondering:

What books, blogs, forums, groups, whatever can I read or join to start coming up to speed on how the top tier web app infrastructures are built, maintained and scaled?

thanks.