I am presently running 27 Windows 2000 servers on 4 dual 1-ghz boxen with 2gb of ram. Since each server used to run on a separate 233mhz box with 96 mb, I can save over $110,000 upfront and more in electricity and management with VMWare. I wouldn't suggest it for all applications but it absolutely rocks for the project we are working on. Remember, I am use the GSX server version, not the workstation version. Other than having a known problem with one kernel version (it was a kernel problem with SMP enabled), we have not had a VMWare issue that has caused an outage. It is hard to argue with 6 figure savings and simplified management. It works for us... YMMV.
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