When the cloud initially walked into the horizon, many people dismiss them, that this is only on paper does not have practical significance. But just a few years, the application of cloud technology has made rapid development, it has become a core component of many enterprise IT strategy. Although the application of cloud computing is a kind of new concept, but the basic concept behind the foreseen well known. Cloud computing draws on many of the principles of traditional mainframe computing, which allows users to share computing power. But the two most important difference is that cloud computing is often relying on a network with open standards, rather than the traditional proprietary systems.
Cloud computing brings together many mainstream technology in the past decade to promote the development of enterprise data centers and supply services, including grid computing, utility computing, clustering, visualization, large-scale shared services and management automation. The rapid development of cloud applications, there have been different functions, different types of clouds. Moment, cloud deployment model is mainly divided into three categories:
Public cloud: the clouds computing, people immediately think of is the public cloud. In the public cloud model, the service organization to provide services to the consumer through a network, such as applications, platforms and infrastructure. Users do not need to install, manage, backup or update software, hardware and data center will be able to enjoy the service. But at the cost, users often have in safety performance, user compromise, to sell some control and flexibility on the custom.
Private cloud: Compared with controversial public cloud, private cloud more welcome by the major companies. A private cloud is an organization dedicated to the development of services, operations within the corporate firewall, the company's IT department or cloud service provider management. Private cloud has many advantages and characteristics of public cloud, in addition, it also allows the company IT department for data control to prevent malicious sharing and follow the company's internal regulations and policies. Typically, an enterprise cloud strategy are starting with a private cloud.
Hybrid cloud: Many organizations eventually close friends mixed clouds with public and private cloud combination. Hybrid cloud enables applications to run on public and private cloud, which means that the cloud must support consistency and interoperability standards applied.
Cloud computing has many important advantages
Cloud applications are usually lower initial cost of driving. By consolidating and sharing computing resources, cloud applications can help save over Shengchannengli and hardware, power, cooling equipment and management costs. By standardizing shared database and each application platform, cloud application can save more costs. Second, cloud computing more noticeable advantage is its speed and agility. Timely service and advanced self-service capabilities significantly increase the speed of the new service release, so that enterprises more quickly respond to dynamic market environment, enhance their market competitiveness. Scalable cloud full, but also timely and appropriate computing resources allocation. In addition, in view of the cloud provider business covers all basic services, such as service providers, software updates, software fixes, users can focus on cloud innovation, competitive advantage and core competencies.
Three kinds of cloud services
The real value lies in the cloud services they provide, these services are mainly divided into three categories, namely, software as a service SaaS, PaaS Platform as a Service and Infrastructure as a Service IaaS.
Software as a Service (SaaS): In the SaaS help, business users can quickly enjoy the new features, and low upfront costs than traditional internal systems. All over the network using a SaaS-based applications, such applications may require integration with internal systems or other cloud.
Platform as a Service (PaaS): PaaS cloud service application development and deployment platform. Developers using the platform to develop, deploy and manage applications. PaaS typically includes database, middleware, development tools, programming languages and APIs. By PaaS value lies in its use of standardized, shared platform with reusable services to accelerate application development capabilities.
Infrastructure as a Service (IaaS): IaaS cloud is the most basic services, which consists of a server computing, storage and network, further comprising service-related software (e.g., operating system, and storage visualization software [Note]). Each cloud IaaS is the most basic level, because almost any platform and application software can run on IaaS. But it really is a double-edged sword, because it means that all the work chosen by the user itself is responsible for the infrastructure layer.