Thank you for your reply. I have ordered Tom White's book and it should be here in 5 days I hope. In the meantime I am reading the Jimmy Lin's book online. One of the problems I am trying to solve is that I have 100+ VMs that are collecting logs and I wanted to find a better way to parse those logs and be able to make sense out of it as they are running against a single machine and it's hard to understand what happened in which VM at any given time. Many thanks for the information.