Server refers to an efficient computer that executes corresponding application software under the network environment and provides online users with * * * information resources and various services. Its English name is Server. Because the server is an efficient computer, its composition must be similar to the computer (PC) we usually use, such as CPU (Central Processing Unit), memory, hard disk, various buses and so on. , but it can provide various services (network, Web application, database, file, printing, etc. ) and other efficient applications.
The high efficiency of the server is mainly reflected in high-speed computing power, long-term reliable execution and strong external data throughput. It is the hub of the network and the core of informatization. Because the server is specially designed for specific network applications, it is quite different from a microcomputer (ordinary PC) in terms of processing capacity, stability, reliability, security, scalability and manageability.
The biggest difference between a server and a PC is the reliability in a multi-user and multi-task environment. Users who use a PC as a server must have experienced sudden downtime, unexpected network interruption and occasional loss of stored data. This is because the design and manufacture of PC has never guaranteed the reliability of too many users in a multi-tasking environment, and once a serious failure occurs, its economic loss will be unpredictable.
A server faces the users of the whole network and needs to work 7X24 hours a day, so it must have high stability. On the other hand, in order to achieve high speed to meet the needs of many users, the server uses symmetric multiprocessors (SMP) to install and insert a lot of high-speed memory to ensure its work. Its motherboard can be installed with several or even dozens or hundreds of CPUs at the same time (the CPU used by the server is not an ordinary CPU, but is specially developed and produced by the manufacturer for the server).
Of course, memory is different, whether in memory capacity, performance, technology and so on. In addition, in order to ensure sufficient security, the server also adopts many technologies that ordinary computers do not have, such as redundancy technology, system backup, online diagnosis technology, fault early warning technology, memory error correction technology, hot plug technology, remote diagnosis technology and so on. , so that most faults can be repaired in time without stopping the machine, and the operability is strong.
work station
Workstation, named in English as workstation, is an efficient computer based on personal computer and distributed network computing. It is mainly oriented to professional application fields, and has strong data operation and graphics and image processing capabilities. It is designed and developed to meet the needs of engineering design, animation production, scientific research, software development, financial management, information service, simulation and other professional fields.
Generally speaking, workstations are mainly used in the following fields:
(1) Computer Aided Design and Manufacturing CAD/CAM: This field is a traditional field of workstations. Using CAD/CAM technology can greatly shorten the product development cycle, reduce the development difficulty of high-tech products and improve the design quality of products. In the field of CAD, from a large building to a small part, the graphic workstation shows a strong competitive advantage with its intuition, high precision and high efficiency.
(2) Animation design: users are mainly TV stations, advertising companies, film and television production companies, game software development companies and interior decoration companies. The TV station uses the graphic workstation to make the opening animation of each TV column; Advertising companies use it to make animation scenes of advertising festivals; Film and television production companies are used for computer special effects production; Game software companies use it as a development platform; Interior decoration companies not only use graphic workstations for design, but also let users see the three-dimensional simulation renderings after decoration before decoration.
(3) GIS geographic information system: its customers are mainly urban planning units, environmental protection departments, geological surveys and scientific research institutes. They usually use graphic workstations to execute GIS software. So that users can know the details of the project site and surrounding facilities in real time and intuitively, such as lampposts and underground drainage pipes. These large-scale operations can only be performed efficiently on workstations with professional graphics processing capabilities.
(4) Plane image processing: it is an industry with high application popularity. Users usually use graphic workstation as hardware platform and PhotoShop, CorelDraw and other software as operating tools, and devote themselves to colorpage design, packaging design, textile pattern design and other image processing, advertising and other work.
(5) Simulation: In the military field, simulation technology is an effective means to train fighter pilots and tank pilots and simulate maritime navigation; In the field of scientific research and development, it enables designers to simulate and execute on the graphic workstation before making the prototype, find problems in time and modify the design.
What's the difference between a VPS server and a standalone host? In fact, a VPS server divides an independent server into several independent virtual servers through characteristic virtualization technology, some use VM technology, and some use HV technology to divide VPS. At present, the VPS of Haiteng data is segmented by VM technology. There is also a cloud host, which integrates the resources of multiple servers through cloud computing technology and then divides them, which is equivalent to an upgraded version of VPS.
VPS server and cloud host server are suitable for small and medium-sized website customers, and the website space is not enough, so it is too wasteful to use servers. Therefore, VPS and cloud host are his best choices and save money.
Generally, a website needs to use an independent server when its daily IP traffic is above 2000. At this time, not only the hardware resources of the server, but also the bandwidth resources are needed.
What's the difference between Red Hat Enterprise Linux 6 Desktop Edition, Workstation Edition and Server Edition? The difference is the Chinese name. The former is aimed at individual users, while the latter is aimed at enterprise users. The server version can support an enterprise's internal and external network environment, and has many services, such as web, mail, ftp and other servers, while the desktop version tends to operate on the desktop, just like ordinary windows, with a good graphical interface.
What's the difference between a server and a computer? The difference between a server and a computer:
First, high scalability.
Scalability means the configuration of the server (memory, hard disk, processor, etc. ) can be easily added as needed on the original basis.
In order to expand the suite, the server chassis is generally more than twice as large as the ordinary chassis. There are two reasons for designing a large chassis: first, the interior of the chassis is well ventilated; Second, the chassis has seven or eight hard disk brackets, which can hold more hard disks.
The power output of the server is much larger than that of an ordinary PC, and even has redundant power supplies (that is, two power supplies). There are more than a dozen D-type power connectors for chassis power supply, while there are only five or six for ordinary PC chassis.
The memory of the server can be expanded as needed, and the package can generally be expanded to several GB.
Second, high reliability.
Because the server works continuously in the network, the reliability of the server is very high. At present, the common method to improve reliability is redundant configuration of components. The server can adopt ECC memory, RAID technology, hot plug technology, redundant power supply, redundant fan and other methods to make the server fault-tolerant and secure, thus improving its reliability.
Redundant hardware devices support hot plug functions, such as redundant power supply fans, which can automatically switch to standby devices under the clamping action of a single component to ensure the continuity of system execution. RAID technology can ensure that the hard disk can be switched online when there is a problem, thus ensuring the integrity of data.
Third, high processing capacity.
The server may need to respond to requests from dozens, hundreds and thousands of clients at the same time, so the speed of the server is faster than that of an ordinary PC.
There are many factors that determine the performance of CPU, and CPU is just one of them. Others, such as the speed of hard disk, the size of memory and the data throughput of network card, are all important factors that restrict the performance of server.
Fourth, high I/O efficiency.
SCSI technology, RAID technology, high-speed intelligent network card and large memory expansion capacity are all effective ways to improve the I/O capability of IA architecture servers.
Five, high trouble-free execution time
Generally speaking, the requirement of working server is trouble-free during working hours (8 hours a day, 5 days a week); The requirement of departmental servers is 24 hours a day and trouble-free within 5 days a week; The enterprise server is required to be trouble-free 24 hours a day, 365 days a year, and the server is available at any time, referred to as 7x24.
Six, high intensity management
Various sensors are integrated on the motherboard of IA architecture server to detect various hardware devices on the server. Through the corresponding software, the server can be monitored remotely.
Seven, run the server operating system.
A server is a combination of hardware and software. Although a network operating system is installed on an ordinary PC, it can also be called a server, but this kind of server does not have the characteristics of a real server.
Eight, provide network services
Servers with corresponding hardware platforms and operating systems can't play a role. If you want to play its role, you must install network service software on the network server.
What's the difference between a computer and a microcontroller? Microcontroller is an integrated circuit chip. It is a small and perfect computer system with functions (including display driving circuit, pulse width modulation circuit, analog multiplexer, A/D converter, etc.). ) CPU RAM, ROM, various I/O ports and interrupt system with data processing capability.
In other words, the microcontroller is a simplified version of a general-purpose computer!
What is the difference between a cloud server and a vps? The cloud server is at least a dual-machine hot standby. Theoretically, there will be no hardware problems, and the stability and performance are generally better than VPS.
VPS is set up on a server, and once there is a hardware failure, it will crash.
What is the function of workstation/server network in computer? Advantages and disadvantages of workstation/server network Workstations and servers are professional applications in computers. Workstations tend to process graphics, audio and video, and the amount of data is huge. Equipment configuration is more professional than home and office computers. Server network is biased towards communication and data exchange between computers, which includes data connection channels between point location-computer and point-network. It requires the stability of the machine and the timeliness of data exchange. With the development of Internet of Things, data processing will become more and more huge, and server configuration will become higher and higher.
Workstations and server networks are just application tools of computers in different fields, no matter good or bad. Graphics workstations are excellent in engineering drawing and 3d because they are equipped with professional graphics cards. Because the audio workstation is equipped with a professional sound card, it has extraordinary performance in sound-audio processing. Other workstations are the same, each with its own strengths. Server network is more inclined to data transmission, stability, security and so on. So the general servers are multi-core, multi-processor, large memory, high-speed network card, high-speed disk and excellent full-line card. The server has no special requirements for graphics cards and sound cards.
Whether it is a workstation or a server, its basic configuration-CPU, motherboard, memory, etc. -It's incomparable with home and office computers. Workstations are definitely better than ordinary PCs, and servers used in networks are generally integrated with sound cards and graphics cards, which are not suitable for home and office. For example, playing games, it is definitely not possible to execute the current mass effect 3 and Wizard 3 on the network server in the computer room, but professional graphics workstations can, with more realistic pictures and more realistic colors. Because the processing core of advanced professional graphics cards now includes or even far exceeds the low-end graphics cards for entertainment, professional audio workstations for listening to music are also professional enjoyment. There is nothing wrong with using the workstation for entertainment, but it is too wasteful. Through this, we can simply understand the simple differences between workstations, servers and home computers.
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What's the difference between supercomputers, servers and personal computers? Supercomputer refers to a computer cluster with strong computing power, which generally includes thousands of efficient CPUs and has the strongest computing power. The server has a wide range, but it is also an efficient computer to provide web pages, queries, storage or primary computing services. It can be multi-cpu or single cpu, but the scale is much worse than that of supercomputer. A personal computer is an ordinary computer with only one or more PCs (it rarely uses multiple CPUs as personal computers, which consumes more power). You can surf the Internet, program, watch movies, play games and so on. Poor computing ability, not suitable for cooperative scientific computing.
Supplement: Generally speaking, computing power refers to scientific calculation with a large amount of calculation, such as mathematical modeling, optimal path search, model solution and so on. I used a personal computer (general configuration, P42.8) to calculate an optimal path, ranging from 5 minutes to 40 minutes. If you develop a program on such a computer, the cycle is too long, and you can't run it several times a day. You must use a server or a supercomputer.