The world's smallest cloud)

Now, it is common sense for enterprises to host servers in data centers. But what if the server fails? The answer is: Shut down for repair. In this way, the business of an enterprise will be adversely affected.

If three computers are connected, one is connected to the Internet (Route Allocation), and the other two are used as servers, the program is run later. In this case, we assume that a physical fault has occurred to a server, if the router is able to automatically, quickly, and continuously move the applications running on the faulty server to another server that is not frequently used, the user can stop the applications, after troubleshooting, the integrity of the three units will be maintained. This is the smallest "Cloud ".

In cloud computing, the role of a router is critical. It is the so-called "cloud computing" brain. The applications running on the server must be run in the virtual environment to be "automatically allocated" by the Monitoring Management Program of the router, an "Genie" (Agent Program) must be run in the backend of the server to notify the Monitoring Program of the server's running status at any time to ensure automatic scheduling.

In the automatic scheduling of the router Monitoring Program, the application floated between servers, just like the floating cloud in the sky, and the location is unknown, because for users, the physical server on which their applications run is not important, as long as they run continuously.

21 vianet dared to sign SLA (Service Level contract) with users ),. This is the secret to ensuring that your programs run normally for 99.95% of a year. In server cabinets, many servers are in the "standby" state of low power consumption, and applications are automatically concentrated on a few servers (energy-saving). Once required, it can quickly wake up other servers and everyone is busy to meet fluctuating social computing needs.

Note: the theoretical basis of cloud computing is virtualization technology. For cloud computing, the larger the cloud scale, the safer the system, rather than the opposite. This is the real reason why 21 vianet must become bigger and stronger.

The world's smallest cloud)