If You/Your company are involved in big data , please elaborate on the Stack you are using, your workload, how well does the stack hold against worload.
I don't know if it qualify as "big data", but to fetch, index, classify (meta-data analysis) and rerank daily (6 hours) a set of more than 5 millions medical publications, the stack is simple :<p>- Glassfish 3 (EJB, JPA, JSF)<p>- PostgreSQL 9<p>- Lucene (used as an index and as a NoSQL store)<p>- hardware: blazing fast SSD and 8GB+ RAM for PostgreSQL<p>I'm impressed by PostgreSQL, handling without a fuss tables containing more than 60 millions entries (well, I like tuning the DB conf and the ORM, it's usually the best effort/result ratio in devs :)