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Date Center

The basic architecture of a data center is to connect servers in a cabinet to low-level switches, and low-level switches to upper-layer switches. Early data centers adopted the traditional three-layer architecture of access-Aggregation-core, modeled after the telecommunications network with access-metro - backbone structure. This three-layer network structure is very suitable for the transmission between servers and external devices (north-south), and information is transmitted from outside the data center to the center.

As the demand for cloud computing and big data leads to an increase in data flow between servers (east-west), the market has begun to appear a two-tier leaf ridge architecture where the convergence layer and the core layer are fused. In this topology, the network is flattened from three layers to two layers, and all blade switches are connected to each ridge switch, so that data transmission between any server and another server only needs to go through one blade switch and one ridge switch, reducing the need for devices to find or wait for connections, reducing latency and reducing bottlenecks. It greatly improves the efficiency of data transmission and satisfies the high performance computing cluster application.


Chengdu Sandao Technology Co., LTD.

traditional 3-Tier and Spine-Leaf
Typical scenarios of date center

Typical scenarios

The data center network architecture is divided into Spine Core, Edge Core , and TOR.

* From the server NIC to the access switching area switch, 10G-100G AOC active optical cable is used for interconnection.
* 40G-100G optical modules and MPO fiber jumpers are used to connect access switch area switches to core area switches in modules.
* From the module core switch to the super-core switch, 100G QSFP28 optical module and LC double fiber fiber jumper are used for interconnection.


Features of data center optical module requirements

* The iteration period is short. Data center traffic is growing rapidly, driving optical modules continue to upgrade, and is accelerating, including optical modules, data center hardware equipment generation cycle of about 3 years, and carrier-grade optical module iteration cycle is generally more than 6 to 7 years.
* High speed requirement. Due to the explosive growth of data center traffic, the technological iteration of optical modules cannot catch up with the demand, and basically the most cutting-edge technologies are applied to the data center. For higher speed optical modules, data center demand has always been there, the key is whether the technology is mature.
* High density. The high-density core is to improve the transmission capacity of switches and server boards, in essence, to meet the needs of high-speed traffic growth; At the same time, higher density means that fewer switches can be deployed to save room resources.
* Low power consumption. The data center consumes a lot of power, and the low power consumption is to save energy on the one hand, and to deal with the heat dissipation problem on the other hand, because the backplane of the data center switch is full of optical modules. If the heat dissipation problem cannot be properly solved, the performance and density of the optical modules will be affected.