Shulou(Shulou.com)06/03 Report--

Today, what the editor shares with you is the difference between virtual machine and cloud computing. I believe most people don't know much about it. In order to make you understand better, the editor summed up the following contents. Without saying much, let's move on.

Cloud computing is a kind of service model, which is not unique to the computer industry, nor is it unique to modern times, but a service model that has existed for a long time. The idea is to integrate all kinds of resources and then rent them to users in need.

Compared with the library, everyone is very familiar with it. The library has collected a lot of books. If you want to read books, you just need to go to the library to borrow them according to your own needs. The library will charge according to the quantity and time you borrow. When you have finished reading, return the books to the library, put the books back on the original shelves, and other users.

The benefits of cloud computing also come out, why do you rent a server instead of buying it yourself, because you may just want to use it for a period of time, rather than buying your own server, the cost is too high, rental is more convenient. In addition, you need to evaluate how much you need to buy according to the business, and you may find that it is not enough, so you re-purchase, the process is troublesome, you buy too much, and there is a waste of resources. And lease is more flexible, how much you need, how much to rent, you don't need to return it to the cloud service provider.

Private clouds, too, are just internal settlement. The above is the operation mode of IaaS. You may have this situation. You have written a Web project and packed a war package, but you do not have a server on hand to run. You can give your war package to a cloud service provider, and they will run it for you. You do not need to rent the whole server or build a running environment. Just copy the war package to them and they will help you deploy and run it. This is what we call PaaS services. At a higher level, you have a lot of photos on hand, and you want to extract the characters from the photos, but you can't write the code to implement them. You can send the photos to cloud service providers, and they can send the results to you through their own facial recognition technology, which is similar to SaaS.

Cloud computing, more specifically, cloud computing does not refer to a specific technology, but a service model, a way of delivery.

VMWare (Virtual Machine ware) is a "virtual PC" software company. Its products allow you to run two or more Windows, DOS, and LINUX systems on one machine at the same time. VMWare uses a completely different concept than a "multi-boot" system. The multi-boot system can only run one system at a time, and the machine needs to be restarted when the system is switched over.

VMWare is really running "at the same time", with multiple operating systems switching on the platform of the main system, just like standard Windows applications. And each operating system you can carry on the virtual partition, the configuration without affecting the real hard disk data, you can even connect several virtual machines to a local area network with the network card through the network card, which is extremely convenient. The performance of the system installed on the VMware operating system is much lower than that installed directly on the hard disk, so it is more suitable for learning and testing.

To sum up, virtual machines and cloud computing have their own advantages and disadvantages, and they have to choose one of them according to their own situation. If you want to know more about related articles, you are welcome to follow the industry information channel.

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