Improvements for systems that are often only 1020

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improvements for systems that are often only 10–20% utilized. [25] Reliability improves through the use of multiple redundant sites, which makes cloud computing suitable for business continuity and disaster recovery. [38] Nonetheless, many major cloud computing services have suffered outages, and IT and business managers can at times do little when they are affected. [39][40] Scalability via dynamic ("on-demand") provisioning of resources on a fine-grained, self- service basis near real-time, without users having to engineer for peak loads. Performance is monitored, and consistent and loosely-coupled architectures are constructed using web services as the system interface. [36] Page 6 of 15 Cloud computing - Wikipedia, the free encyclopedia 9/15/2009
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Six layers components of cloud computing Security typically improves due to centralization of data [41] , increased security-focused resources, etc., but concerns can persist about loss of control over certain sensitive data, and the lack of security for stored kernels [42] . Security is often as good as or better than under traditional systems, in part because providers are able to devote resources to solving security issues that many customers cannot afford [43] . Providers typically log accesses, but accessing the audit logs themselves can be difficult or impossible. Ownership, control and access to data controlled by "cloud" providers may be made more difficult,just as it is sometimes difficult to gain access to "live" support with current utilities. Under the cloud paradigm, management of sensitive data is placed in the hands of cloud providers and third parties. Currently, many developers are implementing OAuth (open protocol for secure API authorization), as it allows more granularity of data controls across cloud applications. OAuth is an open protocol, initiated by Blain Cook and Chris Messina, to allow secure API authorization in a standard method for desktop, mobile, and web applications. Sustainability comes about through improved resource utilization, more efficient systems, and carbon neutrality. [44][45] Nonetheless, computers and associated infrastructure are major consumers of energy. A given (server-based) computing task will use X amount of energy whether it is on-site, or off. [46] Components Client See also category: Cloud clients A cloud client consists of computer hardware and/or computer software which relies on cloud computing for application delivery, or which is specifically designed for delivery of cloud services and which, in either case, is essentially useless without it. [47] For example: Mobile (Android, iPhone, Windows Mobile) [48][49][50] Thin client (CherryPal, Zonbu, gOS-based systems) [51][52][53] Thick client / Web browser (Apple Safari, Mozilla Firefox, Google Chrome, Opera, Microsoft Internet Explorer) Service See also category: Cloud services A cloud service includes "products, services and solutions that are delivered and consumed in real- time over the Internet" [36] . For example, Web Services ("software system[s] designed to support
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