It looks like IACS managed to stir up a few questions for everyone with his little thread. Between that and the discussion over lunch, well, time to bring the question to a larger audience... Is Visualization a step forwards or backwards? We are currently in the process of doing a hardware replacement for a lot of our unix machines for one of our clients. Currently we have around 200 physical machines and ~240 logical machines. (AIX on pSeries) The current plan is to replace our p5, p4 (and older) machines with approx 15 new physical machines, but we will be keeping the same number of logical partitions. The question that was asked is that with what amounts to most/all of the production environment ending up on one physical host, if that host has a major problem, then we WILL lose the production environment, with the current setup, we can pull the power on half the DC before we would lose most of the applications. With the issues we already have getting outages for OS/firmware upgrades, trying to drop an entire environment to upgrade the firmware for one box will now be even harder, and yet we are still told this is a step forward. The second question comes from another client, who (again, it is time to start planing what the next generation of hardware will look like) is suggesting that a specific application could be moved off AIX/pSeries and onto VMware linux, because it will be a cost saving, and 'everything should be virtualized, it is the "way of the future"' - Telling the CIO of that client that his solution is not supported by the application vendor, that AIX/pSeries is seen as best practice by the vendor, and the application support teams prefer the current setup and would like to just move from p5 to p7 doesn't seem to get through to those people who get to make the decisions. So - in reality - are we going forwards or backwards?