Cloud computing explained pdf

Internet and a standardized cloud-like shape was used to denote a network on telephony schematics. With this simplification, the implication is that the specifics of how the end points of a network are connected are not relevant for the purposes of understanding cloud computing explained pdf diagram. The beauty of Telescript  is that now, instead of just having a device to program, we now have the entire Cloud out there, where a single program can go and travel to many different sources of information and create sort of a virtual service.

No one had conceived that before. Yet, the “data center” model where users submitted jobs to operators to run on IBM mainframes was overwhelmingly predominant. They began to use the cloud symbol to denote the demarcation point between what the provider was responsible for and what users were responsible for. As computers became more diffused, scientists and technologists explored ways to make large-scale computing power available to more users through time-sharing. They experimented with algorithms to optimize the infrastructure, platform, and applications to prioritize CPUs and increase efficiency for end users. Since 2000, cloud computing has come into existence.

RESERVOIR European Commission-funded project, became the first open-source software for deploying private and hybrid clouds, and for the federation of clouds. IT products in some areas and significant reductions in other areas. Several studies aim at comparing these open sources offerings based on a set of criteria. General Availability in December 2013. 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.

The cloud aims to cut costs, and helps the users focus on their core business instead of being impeded by IT obstacles. Virtualization software separates a physical computing device into one or more “virtual” devices, each of which can be easily used and managed to perform computing tasks. By minimizing user involvement, automation speeds up the process, reduces labor costs and reduces the possibility of human errors. Users routinely face difficult business problems. Cloud computing provides all of its resources as services, and makes use of the well-established standards and best practices gained in the domain of SOA to allow global and easy access to cloud services in a standardized way. Such metrics are at the core of the public cloud pay-per-use models. In addition, measured services are an essential part of the feedback loop in autonomic computing, allowing services to scale on-demand and to perform automatic failure recovery.

Distributed computing paradigm that provides data, compute, storage and application services closer to client or near-user edge devices, such as network routers. A distributed architecture without the need for central coordination. A live, isolated computer environment in which a program, code or file can run without affecting the application in which it runs. Agility for organizations may be improved, as cloud computing may increase users’ flexibility with re-provisioning, adding, or expanding technological infrastructure resources.

Cost reductions are claimed by cloud providers. Pricing on a utility computing basis is “fine-grained”, with usage-based billing options. As well, less in-house IT skills are required for implementation of projects that use cloud computing. Internet, users can connect to it from anywhere. There is a sense of location independence in that the consumer generally have no control or knowledge over the exact location of the provided resource. Time may be saved as information does not need to be re-entered when fields are matched, nor do users need to install application software upgrades to their computer. This gives the ability to scale up when the usage need increases or down if resources are not being used.

Security is often as good as or better than other traditional systems, in part because service providers are able to devote resources to solving security issues that many customers cannot afford to tackle or which they lack the technical skills to address. However, the complexity of security is greatly increased when data is distributed over a wider area or over a greater number of devices, as well as in multi-tenant systems shared by unrelated users. Private cloud installations are in part motivated by users’ desire to retain control over the infrastructure and avoid losing control of information security. The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. Capabilities can be elastically provisioned and released, in some cases automatically, to scale rapidly outward and inward commensurate with demand. To the consumer, the capabilities available for provisioning often appear unlimited and can be appropriated in any quantity at any time. Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer of the utilized service.