On 11/04/2012 09:36 PM, Ashkan Rahmani wrote: >> 4. Run tests on one OS then reboot and run same tests on another. In >> this setup you can even run realtime tests on Linux in off-hours. >> > > you wrote "4. Run tests on one....". tests. I want to know about tests. > What tests can help me to compare? If you install CentOS on spare HDD and setup tomcat exactly it is on Windows, then you can organize users to simulate use of your application just like they would on Windows server. You can schedule shutdown of Windows server and reboot to CentOS with same IP address, and signal users to simulate regular usage of application with prepared data. -- Ljubomir Ljubojevic (Love is in the Air) PL Computers Serbia, Europe Google is the Mother, Google is the Father, and traceroute is your trusty Spiderman... StarOS, Mikrotik and CentOS/RHEL/Linux consultant