What is Cloud:
The Cloud provides those who host their websites on it with the opportunity to use a large amount of resources any time they need them. The resources include processing power, hard drives, and burstable memory. The Cloud Hosting services are usually based on load-balanced clusters, in which the data is stored on SAN (Storage Area Network). Any of the processing nodes (servers) of the cluster can be easily added to or removed from the system when this is necessary. If any server is down for maintenance or for any other reason is not in service, other nodes take the load.