New Parallel and High Performance Computing book arrived in the mail a couple days ago. It's a good update and companion to the O'Reilly High Performance Computing book from 1993.
Let me know how you like it! Getting ready to dive into setting up search and server analytics soon that will need to be real-time. Still trying to decide between ElasticSearch or just using full-text search in our current RDBMS. Downside is we'll quickly outgrow the later as data increases.