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This article mainly introduces "what problems need to be considered in server expansion". In daily operation, I believe many people have doubts about what problems need to be considered in server expansion. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what problems need to be considered in server expansion"! Next, please follow the editor to study!

The scalability of the server itself is a collection of ideas in many aspects, which includes three aspects: the scalability of resources, the scalability of application capabilities and the scalability of technology upgrading.

1. Scalability of resources

This is the easiest indicator of server expansion, where "resources" are generally considered to refer only to credit machine hardware devices, such as CPU, storage devices, IO devices, and so on. However, in a broad sense, resources should also include software, such as operating system, application software and so on. Even, in the increasingly complex era of Internet applications, the concept of resources extends to the level of user needs. Therefore, for the server system that provides services, the "resources" here refer to all the software, hardware and other supporting structures that provide services for users. In this way, when we evaluate the scalable performance of the version cake from the perspective of resources, we can focus on increasing the number of processors and memory capacity, increasing storage components, upgrading software, and even changing the architecture of the system. so that the system has better performance or functionality.

One of the easiest to think of is, of course, to increase the number of disks on the server processor. But not all computers have the same scalability. In theory, an x86 SMP system can only scale up to 64 CPU, while an IBM SP2 can scale to a maximum of 512 CPU, and Sun's Fire 15K server also has 106 processors.

Also note that server extension is not simply about increasing the number of parts. Because with the increase of the number of CPU and other components, the load of memory, bus bandwidth, network and other subsystems also increases. In order to eliminate the performance bottleneck of these components, it is necessary to synchronously add these components or change the system architecture of these components. If the software is also regarded as a server system resource, the scope is even wider. For example, the new version of the operating system can be upgraded to have more new functions, which will have more threads, larger address space, more efficient kernel, and be able to identify more new hardware. you can also install powerful middleware to expand the special functions of the system.

two。 Scalability of application capabilities

In order to fully expand the performance of the service banyan, only considering the scalability of the resources is far from enough, and the expansion of the application capacity of the service banyan must also be given due attention. This requires that when the extended system runs on the user's program system, its performance is also improved in direct proportion with the expansion of resources. When expanding server resources, there is often a question in mind: if you spend so much to expand server resources, will the performance of the system be improved proportionally?

Through practical application, we will find that the limitation of application capacity can not be broken through by simply increasing machine resources. Only after the corresponding optimization and modification of the application itself and the system architecture can the ultimate goal be achieved. The scalability of application capability depends not only on the processor size and transaction scale, but also on the storage brother Rong Jing, lmax 0 capacity and communication capacity of the machine banyan. All of these factors affect scalability together.

3. Scalability of technology upgrad

This consideration is also important for server expansion. Just imagine, what's the point if the expensive extension system can't meet the latest application technology and functional requirements of the enterprise at all? Although it can be multiplied in traditional processing power, new technologies and functions are still not available.

In terms of technology upgrading, the server is similar to the PC, mainly restricted by its motherboard, because most of the key components are connected through the main trigger, such as server bus technology, memory technology, disk controller technology and so on. For example, the processor technology supported by the motherboard is relatively backward, even if a large number of processors are added, it is still unable to support these latest technologies, so it may be necessary to upgrade the technology rather than expand the components. Of course, the "technology upgrade" here is shown not only in the hardware, but also in the software upgrade. If you upgrade a new operating system, you must require the expanded service to support the latest technology of the new system, otherwise the expansion will not be very meaningful, because users simply can not appreciate the new functional experience brought by the new system.

At this point, the study of "what problems need to be considered in server expansion" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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