has been available at universities and research centers that need to run complex programs and do not have the necessary resources.
The idea is not new, but this form of cloud computing is getting new life from Amazon.com, Sun, IBM, and others who now offer storage and virtual servers that IT can access on demand.
Despite similarities, cloud computing shouldn't be confused with grid and utility computing
. So why is the term used generically?
It is important to note that cloud computing is considered distinct from grid or utility computing
. With cloud computing, the user effectively rents time on virtual machines to run their own applications--they do not own any computing resources and may not use any service provider applications.
Handbook of research on grid technologies and utility computing
; concepts for managing large-scale applications.
Prior to the popularity of cloud computing, there were a number of related service offerings that attracted only minor attention--i.e., grid computing, utility computing
, elastic computing, and software as a service.
AT&T www.att.com Synaptic Hosting--"managed networking, security and storage for businesses." Cassatt www.cassatt.com Internal Clouds--internal Utility Computing
The team had a vision of establishing a utility computing
model in which business units could select from a catalog of IT services, such as telephony, storage and server access.
Terremark's acclaimed InfinistructureT utility computing
architecture has redefined industry standards for scalable and flexible computing infrastructure and its DigitalOps(r) service platform combines end-to-end systems management workflow with a comprehensive customer portal.
Designed to maximize cluster and grid computing interconnect performance while simplifying and reducing the cost of operating a data center, QLogic InfiniBand switches provide a solution for IBM-based HPC networks, database clusters and grid utility computing
CEO Michael Proper says the company has been offering a type of end-to-end utility computing
for years, though users keep their existing desktops.
SAVVIS, which will be providing services to Reuters for the next five years, has migrated Reuters' flagship website to its virtualised utility computing
and utility storage infrastructure.