Must understand the server five problems

1 Dual is equal to dual-core? Problem: I often hear that the two-way Xeon XX server, and recently appeared dual-core Xeon, are two CPUs, is dual equal to dual-core Answer: It is not the single, dual, four or even eight way of the server. The “Road” refers to the number of physical CPUs of the server, that is, the number of CPU sockets on the server motherboard. The recent emergence of dual-core processors is to encapsulate two CPU cores inside a physical CPU. This has the advantage of allowing users to have more powerful performance without increasing costs. Moreover, it can significantly reduce the performance-to-power ratio, which is also of positive significance for enterprise users to save on the cost of use. 2 The difference between Xeon and Pentium: In many servers, there are powerful processors, and Pentium 4 as a processor. In addition to the Pentium 4 processor server products, it is cheaper, Xeon and What is the difference between Pentium? Intel Pentium 4 631 3.0GHz (box) Intel Xeon 3.2G (800MHz/2M /box) Answer: The Xeon processor used on the server and the ordinary P4 processor are basically the same. One of the differences is that when the Intel Pentium 4 processor started, the Pentium 4 processor was classified as a personal processor. Users could not construct a 2-way server system with two Pentium 4 processors, and developed a Xeon processor with higher computing efficiency. Device. Xeon processors are currently classified into Xeon DP (maximum support for dual processing) and Xeon MP (maximum support for 8-way processing). The second difference is that the secondary cache is different. Xeon's L2 cache is 1MB to 16MB, P4's L2 cache is 512KB to 1MB, and the L2 cache capacity is also an important factor in determining server processing performance. Xeon series CPUs are mostly 604 interfaces, while P4 CPUs are mostly 478 pins or 775 architecture. Note: Under the X86 architecture, in addition to the Intel Pentium and Xeon series processors, AMD also provides a dedicated processor for the server - Opteron Opteron, which can support up to 8 channels. AMD Opteron 865 865 (scatter) 3 server types: server according to the structure, there are several types? Answer: currently according to the shape structure, the server can be divided into three types: tower, rack, blade .

Tower Servers The general tower server chassis is similar to our usual PC chassis, while the large tower chassis is much larger. In general, there is no fixed standard for the form factor. Rack Servers Rack servers are a server type with a 19-inch rack as a standard width due to the dense deployment of the enterprise, ranging from 1U to several U. Placing the server in a rack is not only good for routine maintenance and management, but it can also avoid unexpected failures. First, placing the server does not take up too much space. The rack server is neatly discharged into the rack without wasting space. Secondly, the connecting wires and the like can also be neatly placed in the rack. Power cables and LAN cables can be routed in the cabinet to reduce the number of cables that are stacked on the ground, thus preventing accidents such as kicking off wires. The specified dimensions are the width of the server (48.26 cm = 19 inches) and the height (multiple of 4.445 cm). Since the width is 19 inches, the rack that satisfies this requirement is sometimes referred to as a "19-inch rack". Blade Server Blade Server is a low-cost HAHD (High Availability High Density) server platform designed for specific application industries and high-density computer environments. Each of these blades is actually "blade". It is a system motherboard, similar to a separate server. In this mode, each motherboard runs its own system, serving a different set of users, and is not related to each other. However, you can use system software to aggregate these boards into a single server cluster. In cluster mode, all motherboards can be connected to provide a high-speed network environment that can share resources and serve the same user base. 4 “What is U”? Question: What do you mean by “U”” in 1U and 2U servers? Does it mean the number of server processors? Answer: “U” In the server field, it refers to the rack type. Server thickness, a unit that represents the size of the server's exterior, is an abbreviation of unit, and the detailed size is determined by the American Electronics Industry Association (EIA) as an industry group. The reason for specifying the size of the server is to keep the server in the proper size for placement on an iron or aluminum frame. The rack has a screw hole for fixing the server, and it is aligned with the screw hole of the server and fixed by screws. The thickness is 4.445 cm as the basic unit. 1U is 4.445cm, and 2U is 2 times that of 1U is 8.89cm. In other words, the so-called "1U rack server" is a product that meets EIA specifications and has a thickness of 4.445cm. 5 What is the difference between a server and a workstation? Question: What is the difference between a server and a workstation? A server provides various services to a workstation, a network communication service, a file sharing service, a hardware sharing service, and various resource services. The workstation can also help the server to offload computing and other tasks while acquiring various resources of the server. Servers and workstations are high-performance computers, but the server is relatively focused on data throughput, so more peripherals (hard disks, I/O slots, etc.) are supported, while workstations focus on graphics processing capabilities, so The design is relatively small, but the architecture is specially designed for graphics processing, using high-end graphics cards to support 3D image processing. Workstations are mainly used in various design and multimedia production fields.