The concept of IT is information technology, where "I" represents information (or data), and "T" represents technology (or computing). Technology is used to process information, so I am the purpose, T is the means, and T serves me. The security related to T is mainly "computing availability". If people cannot handle I because of T, then this situation is called calculation unavailable.
People are unable to process all or part of the data due to unavailability of computing, and power failure, network disconnection, software and hardware failure, application software missing, and forgetting account or password. All or part of the calculation will be unavailable. Compared with traditional IT systems, cloud computing does add a link that may fail - Cloud. Once the cloud collapses, it will have a broad impact, but it cannot be denied completely, because there is nothing perfect in the world.
Decision makers and cloud computing engineers will balance the importance and cost of computing to build a cloud that everyone is satisfied with. For example, a national public cloud that concerns everyone's interests will consider setting up disaster recovery clouds in different cities and setting up data backup centers in another country; For a public cloud involving the whole province, it can be considered to establish data backup centers in other provincial cities; The private cloud of Fortune 500 companies can establish a remote disaster recovery cloud; The private cloud of medium-sized enterprises may introduce cluster, fault tolerance and failover technologies; Even the dedicated office cloud of a small company with only a dozen people will use dual machine fault tolerance technology. Only when two servers fail at the same time can the office be affected, but the probability of simultaneous failures can be almost ignored, unless uncontrollable events such as power failure or earthquake occur.
The IT system also follows the development process of "manual stand-alone private cloud public cloud", and the benefits of each evolution are far greater than the disadvantages of the introduction. Even enterprises that do not use cloud computing have many "single points of failure" in their IT systems. Once a problem occurs, it will affect the business processing of the entire enterprise. For example, e-mail system, portal website, ERP system, file server, LAN access authentication system, etc. That is, the server side of C/S or B/S is a single point of failure. The main reasons for computing unavailability are power failure, network disconnection, hardware failure and software failure (including virus infection).
Zero foundation is never an excuse. No time is never an excuse. Persistence in learning is what I want to convey! Seize the opportunity of on-site experience class of Qianfeng Anti war Class to create a better tomorrow with diligence and sweat. Leave a message below to listen to the course and receive the 900G video tutorial of Qianfeng.
In traditional IT systems, the probability of computing unavailability caused by PC hardware and software failures is close to 95%, of which software failures are the most common, while the probability of computing unavailability caused by power failure and network disconnection is very small, and the probability of computing unavailability caused by server failure is less than 5%. When enterprises adopt cloud computing, the cloud terminal is a pure hardware low-power product. The CPU and memory are welded to the motherboard, and there is no hard disk, so the failure probability of the cloud terminal can be almost ignored. The cloud adopts multi-channel power supply, constant temperature and humidity system, and introduces cluster technology, fault tolerance technology and load balancing technology to ensure the continuous availability of computing. In this way, the cloud computing system composed of cloud, network and terminal has extremely high reliability and security, and the availability of computing is very high.
