Five basic server issues you must know

Today we are going to talk about a few questions about the basic knowledge of the server, which are also some common questions that confuse the "rookies" who are new to the server field:

1 Dual-way equals Dual-core?

Question

:I often hear about dual-core Xeon XX-style servers. Recently, dual-core Xeons have appeared, both with two CPU, right? Dual-channel equals dual-core?

Answer

:No

No matter the server is single-channel, dual-channel, four-channel or even eight-channel, the "channel" refers to the server's physical

CPU The number of is the number of CPU slots on the server motherboard.

The dual-core processor that has appeared recently is to package two

CPU cores inside a physical CPU. The advantage of this is that it allows users to have More powerful performance. Moreover, it can significantly reduce the performance/power consumption ratio, which also has positive significance for enterprise users to save usage costs.

2

The difference between Xeon and Pentium

Question

:In many servers, some use Xeon as the processor, and some use Pentium4 As a processor, apart from server products using Pentium 4 processors which are cheaper, what are the differences between Xeon and Pentium?

Intel

Pentium4 631 3.0GHz( Box)

Intel Xeon 3.2G(800**z/2M/

Box)

Answer

: Xeon processors and ordinary used on servers The core of the P4 processor is basically the same.

One of the differences is that starting with the Intel Pentium

4 processor, the Pentium 4 processor is classified as a personal processor. Users cannot use 2Pentium 4 processor to build a 2 server system, and develop a Xeon processor with higher computing performance. Xeon processors are currently divided into Xeon DP (maximum support for dual-channel processing) and Xeon MP (maximum support for 8processing).

The second difference is that the second level cache is different. The Xeon's L2 cache is

1MB~16MB, the L2 cache of P4 is 512KB~1MB, and the capacity of the L2 cache also determines the server important factor in processing performance.

Xeon series

CPU mostly have 604 interfaces, while P4’s CPU mostly have 478pins Or 775 architecture .

Note

: Under the OpteronOpteron can support up to 8 channels. AMD Opteron Opteron 865(Business)

3 Several types of servers

Question:

The server is divided according to structure , how many types are there?

Answer:Currently divided according to appearance and structure, servers can be divided into three types: tower type, rack type, and blade type.

Tower serverGeneral tower server cases are similar to our commonly used

PC cases, while large tower cases are much thicker, and the overall dimensions are There are no fixed standards.

Rack Server

Rack server is a type of server formed to meet the dense deployment of enterprises, with 19 inch rack as the standard width, and the height ranges from 1U to several U. Placing the server on the rack is not only beneficial to daily maintenance and management, but may also avoid unexpected failures. First, placing the server does not take up too much space. Rack servers are arranged neatly in the rack with no wasted space. Secondly, connecting cables, etc. can also be neatly stored in the rack. Power cords and LAN cables can all be routed in the cabinet, which can reduce the accumulation of connecting wires on the ground and prevent accidents such as kicking off wires. The specified dimensions are the server’s width (48.26cm=19 inches) and height(a multiple of 4.445cm). Since the width is 19 inches, a rack that meets this specification is sometimes referred to as a "19" rack.

Blade server

Blade server is a HAHD (High Availability High Density, High Availability High Density) low-cost server platform, which is specially designed for extraordinary Designed for application industries and high-density computer environments, each "blade" is actually a system motherboard, similar to independent servers. In this mode, each motherboard runs its own system, serving different designated user groups, and is not related to each other. However, system software can be used to combine these motherboards into a server cluster. In cluster mode, all motherboards can be connected to provide a high-speed network environment and can share resources to serve the same user group.

4 、2U" in the server What does U" mean

? Does refer to the number of server processors? Answer:"U" specifically refers to the rack in the server field Server thickness is a unit that represents the external dimensions of a server. It is an abbreviation for unit. The specific dimensions are determined by the Electronic Industries Association (EIA) as an industry group.

The reason why the size of the server is specified is to keep the server at an appropriate size so that it can be placed on an iron or aluminum rack. There are screw holes on the rack to fix the server. Align it with the screw holes of the server and secure it with screws. Thickness is based on 4.445cm. 1U is 4.445cm, 2U is 1U2 times is 8.89cm. In other words, the so-called "1U rack server" is a product that meets the 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?

The server is provided for workstations Various services, network communication services, file sharing services, hardware sharing services, various resource services. While the workstation obtains various resources from the server, it can also help the server offload computing and other tasks.

Both servers and workstations are high-performance computers, but relatively speaking, servers focus on data throughput capabilities, so they support peripherals (hard drives, I/O

slots, etc.) More;The workstation focuses on graphics processing capabilities, so it has relatively few peripherals, but it adopts an architecture designed specifically for graphics processing, uses high-end graphics cards, and supports

3Dimage processing. Workstations are mainly used in various design and multimedia production fields.

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The above introduces five basic server issues that must be understood, including aspects. I hope it will be helpful to friends who are interested in PHP tutorials.