The data center is the most critical IT (information technology) resource and business core of the enterprise. When the employees and customers of the enterprise cannot access the servers and storage devices of their data center, the overall operation of the enterprise will be greatly affected. According to the survey report of Strategic Solutions, a well-known American IT consulting company, the financial loss caused by a financial brokerage company's hourly network downtime is up to more than $ 6 million. Therefore, more and more enterprises regard the construction of the data center as the top priority of the enterprise, and do not hesitate to invest heavily to meet the needs of current and future enterprise development. The integrated wiring of the data center is also becoming a new business growth point for the entire wiring industry .
1. Data center computer room
The data center is the core part of network exchange and data access. It carries a lot of core data and data management functions. Various servers and data backup equipment, call center switching equipment, network management system, operation equipment control and management equipment are all placed in it. The functions supported by the data center include remote access and login of various end users, data and multimedia picture download, VOD (video on demand) and various film and television applications. The amount of data exchange is often hundreds of times that of the general network or end user data traffic Even thousands of times.
At present, the data center computer room mainly includes the following types:
a. The IDC (Internet Data Center) computer room with the node computer room of the telecommunications sector as the core. It occupies more than 60% of the market share in the IDC service industry.
b. Data center computer room with group company headquarters as the core. Including banks, securities, listed company headquarters, etc.
c. Data center computer room built mainly by foreign or private telecommunication operators. Smaller scale. The number of servers is generally no more than 500.
d. IT network computer room built by enterprises and government functional departments mainly with data storage.
2. Design of integrated wiring system in data center
2.1 Factors to be considered in the design of the integrated wiring system of the data center
In 2005, the American National Standards Institute (ANSI) and the American Telecommunications Industry Association (TIA) jointly released the "Data Center Telecommunications Infrastructure Standards" (ANSI / TIA-942-2005, hereinafter referred to as TI A-942 standard) to wire The system design provides a reference basis.
The factors to be considered in the design of the data center integrated wiring system vary with different data centers and the equipment they contain, generally including:
a. Standard-based open system.
b. High performance and high bandwidth incorporating growth factors.
c. Support storage devices (ie Fibre Channel. SCSI small computer system interface or NAS network attached storage).
d. Support the developing link aggregation technology.
e. High quality, reliability and scalability.
f. Redundancy.
g. Large capacity and high density.
h. Flexibility and expansibility, easy to move, add and change.
i.BAS (Building Automation System), voice, video, CCTV (closed circuit television) and other weak current systems.
j. Data center security and monitoring system.
2.2 Wiring channel
The wiring can use copper cable (UTP unshielded twisted pair, F / UTP aluminum foil total shielded twisted pair, S / FTP double shielded twisted pair) or optical fiber. This depends largely on the connection interface of the device and the desired Application requirements. In many cases, multiple media types will be used in combination. The user's best option is to consider future development needs when implementing the first wiring. In addition, it is expensive to move, add, and change wiring systems. It also increases the risk of critical components in use. For example, it is common to reserve dark optical fibers (optical fibers that have been laid but not used) while installing the required optical cables: the equipment may be active or passive.
The data center contains a highly centralized network and equipment. This high concentration requires a high-density wiring system. The cabling channels of the data center generally include the combination of underground channels and overhead cable trays under the raised floor. The advantage of raised floors is to provide a neat appearance and effective heat management, and it is easy to introduce / extract dark lines. Cables under the raised floor should be laid in wire grooves (wiring paths) to protect them from power cables, safety devices and fire extinguishing systems operating in the same environment. The power cable can pass through a metal tube or can be laid in a metal trunking. And should comply with the minimum separation distance requirements of relevant standards.
The optical fiber wiring channel and management of the data center should have a dedicated pipeline system. It provides safe protection for the routing and storage of optical fiber jumpers, pigtails and optical fiber distribution frames, splice boxes and trunk optical cables between terminal equipment. Because optical fiber propagates optical signals rather than electrical signals. Compared with copper cables, the requirements for carrying and bending radius are different. The design requires appropriate reserved space.
2.3 Topology of the wiring system
The topological structure types and basic characteristics of the data center wiring system are shown in the table below.
According to the TIA-942 standard and the "White Paper for Integrated Wiring System Management and Operation and Maintenance" issued by the Comprehensive Wiring Working Group of the Information and Communication Professional Committee of the China Engineering Construction Standardization Association, the construction space of the data center includes: computer room / host room: Communication room; maintenance personnel office; access room; mechanical and electrical equipment room; operation supervision center: storage and loading room.
In a data center, the typical computer room / host room space area is divided into:
a. Main wiring area (MDA), used to place routers, backbone cables, LAN / SAN switches, PBX program-controlled switches, and distribution frames.
b. Horizontal wiring area (HDA). Used to place LAN / SAN / KVM switches and patch panels.
c. Zone wiring area (ZDA), used to place the junction box / integration point of the intermediate connection area between HDA and EDA.
d. Equipment wiring area (EDA), used to place racks / cabinets / equipment and outlet boxes.
In addition, the computer room / host room is directly related to the access room (ER), where the access equipment of the network operator is placed.
The cables of the data center wiring system are:
a. Horizontal cables provide horizontal cross-connects for equipment wiring areas, horizontal wiring areas, and regional wiring areas.
b. The backbone cable provides backbone cross-connection between the main wiring area, horizontal wiring area, access room, and telecommunications room (TR).
c. Recommended wiring transmission medium: 100Ω 4-Pair CAT6 twisted pair: laser optimized 50 / 125μm multimode fiber OM1 / OM3; single mode fiber: 75Ω coaxial cable.
3. Introduction of data center solution examples
The following describes the application design of the pre-connected optical cable solution in the financial data center through an example.
This project is the expansion project of a bank's large data center. That is, in the reserved space of the data center computer room. 4 new cabinets, each with 10 units, are used to place minicomputers, and each minicomputer contains 96 fiber interfaces . Users want to establish a high-standard wiring system. The system should support large-capacity information. It is easy to flexibly adjust and expand.
The topology of the wiring system of a bank's data center is shown above. The system is planned in an end-to-end manner:
a. Management cabinet installation SYSTIMAX InstaPATCH Plus large capacity cabinet pre-connected optical cable distribution frame 1000 G2-4 U-IP-FX, the distribution frame can be vertically installed 12 24 LC port DM2 pre-connected optical fiber modules, the maximum density of 288 core.
b. The under-floor installation box (RFE) is adopted under each minicomputer. The RFE can vertically install 15 24LC DM2 pre-connected optical fiber modules. The maximum density is 360 cores. At present, one design is placed under each minicomputer. When deepening the design, two minicomputers can be shared-one under-floor installation box.
c. The main intervention to connect the optical cable from the management cabinet to the installation box under the floor of each minicomputer is currently planned as follows: each small cabinet plans two 48-core pre-connected optical cables. At the same time, a 12-core pre-connected optical cable is backed up. Satisfy the current needs. Also properly consider the future expansion needs.
Bathroom Cabinet,Bathroom Wall Cabinet,Bathroom Mirror Cabinet,Custom Bathroom Vanities
DUOBUY TECHNOLOGY SHANDONG CO., LTD. , https://www.doubuytech.com