We are planning to virtualize our servers and some of the servers are database servers and some are application server.
What are the things I need to consider? Memory and CPU shouldn't me much problem. We may have issues in I/O performance. If I calculate current IOPS of each server and if I add together I will get total IOPS for the all the physical server and If we buy EMC storage and if we can IOPS equal to sum of physical server's IOPS, then we are ok right?
Anything else we need to consider?