When people say “Big Iron” they are referring to those powerful computers or the mainframes. They are generally used in vital applications in big companies usually involved in massive processing of data like census, statistics and transaction processing.
One of the biggest benefits of mainframes is their reliability in processing massive amounts of data no matter if one or two systems break down it will continue to function compared to normal computers and their biggest disadvantage falls on the high cost of hardware, OS software including its maintenance.
Cloud computing is a web – based application wherein shared resources, software and data are supplied to computers and other tools on demand.
Cloud computing provides a lot of benefits and one of its greatest benefits is cutting down the costs of big and small companies. Its disadvantages lie more on the security risks.