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The cloud aims to cut costs, and helps the users focus on their core business instead of being impeded by IT obstacles.
The main enabling technology for cloud computing is virtualization.
Advocates note that cloud computing allows companies to avoid or minimize up-front IT infrastructure costs.
Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and that it enables IT teams to more rapidly adjust resources to meet fluctuating and unpredictable business demand.
As an open source offering and along with other open-source solutions such as Cloud Stack, Ganeti and Open Nebula, it has attracted attention by several key communities.Several studies aim at comparing these open sources offerings based on a set of criteria.The goal of cloud computing is to allow users to take beneﬁt from all of these technologies, without the need for deep knowledge about or expertise with each one of them.Cloud computing extended this boundary to cover all servers as well as the network infrastructure.Since 2000, cloud computing has come into existence.
Cloud computing also leverages concepts from utility computing to provide metrics for the services used.