The five questions that the rookie on the road server must understand

Today we talk about several issues related to the basics of the server, but also a few common problems that puzzled the "novice" in the server field:

1 Is the dual channel equal to the dual core?

Question: I often hear that the two-way Xeon XX server has recently appeared dual-core Xeon, both CPUs, Isn't two-way equal to dual-core?

Answer: It's not

Regardless of the server's single, dual, four-way or even eight-way, the "road" refers to the server. The number of physical CPUs, that is, the number of CPU sockets on the server board.

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 robust costs without increasing costs. performance. 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

Question: In many servers, there are strong processors, and Pentium 4 as a processor. In addition to the Pentium 4 processor server products are cheaper, what is the difference between Xeon and Pentium?

Intel Pentium 4 631 3.0GHz (box)

Intel Xeon 3.2G (800MHz/2M/box)

Answer: The Xeon processor used on the server is basically the same as the normal P4 processor.

One of the differences is that the Intel Pentium 4 processor began to classify the Pentium 4 processor as a personal processor. Users cannot build a 2-way server system with two Pentium 4 processors. A Xeon processor with higher computing efficiency. 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.

The Xeon series CPUs are mostly 604 interfaces, while the P4 CPUs are mostly 478 pins or 775 architecture.

Note: In 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 (散)

3 types of servers

Question: The server is divided according to structure, there are several Types?

Answer: At present, according to the shape structure, the server can be divided into three types: tower type, rack type and blade type.

Tower Server

The general tower server chassis is similar to our usual PC chassis, and the large tower chassis is much larger, in general There is no fixed standard for the dimensions.

Rack Server

Rack Server is a server type with a 19-inch rack as a standard width due to the dense deployment of the enterprise. 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 size is the width of the server (48.26cm = 19 inches) and the height (multiple of 4.445cm). Since the width is 19 inches, the rack that satisfies this requirement is sometimes referred to as a "19-inch rack."

Blade Server

The blade server is a low-cost server platform (HAHD) with high availability and high density. It is designed for special applications. Designed in a high-density computer environment, each "blade" is actually 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? Is it the number of server processors?

Answer: “U” refers to the thickness of the rack server in the server field. It is a unit that represents the external dimensions of the server. It is an abbreviation of unit. The detailed size is used by the industry group. The Electronic Industry Association of America (EIA) decided.

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 rack. 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 4.445cm 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 the EIA specifications and has a thickness of 4.445 cm.

5 What is the difference between server and workstation?

Question: What is the difference between server and workstation?

Server is for workstation Provide a variety of services, network communication services, file sharing services, hardware sharing services, 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 peripherals are relatively small, but using a framework designed specifically for graphics processing, using high-end graphics cards, support for 3D image processing. Workstations are mainly used in various design and multimedia production fields.