本文内容来自SNIA资料《Next-generation Interconnects: The Critical Importance of Connectors and Cables》,供大家参考。
内容要点
- 通用可插拔连接器和介质类型
- 铜缆和光纤介质
- 25/50Gb以太网的发展
- 为什么线缆类型很重要
- 铜缆和收发器
- 信号调制
- 光纤连接器
- 为什么品种繁多
- 现实世界的用例
(图片点开后可放大,以下同)
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1、通用可插拔连接器和介质类型
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注:在4-8 lane连接密度的QSFP和QSFP-DD之后,有2个发展方向——一个是密度再加倍(可扩展到16-lane)的OSFP-XD,另一个则是2 lane的DSFP 和 SFP-DD。
扩展阅读:在《PowerEdge MX网络篇:从100GbE到32Gb FC的2种姿势》一文中,我曾经做过QSFP28-DD的图解。
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单模光纤和多模光纤,这个许多朋友应该很熟悉了,后面还有关于芯径、波长、传输距离等的介绍。
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2、铜缆 与 收发器 101
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不同信号调制编码的波形眼图,PAM4是当前高速率传输的趋势。
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典型的Spine-Leaf 三层组网。
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机架内部的南北向(North-South)流量,占到以太网数据流量的70-80%,推荐DAC等铜缆;数据中心内部跨机架的东西向(East-West)流量占15-25%,推荐多模光纤;而只有不到5%的流量到达核心路由器,这个可以用单模光纤。
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排名HPC超级计算机世界TOP500榜首的富士通富岳(Fugaku),使用了超过10万条AOC网线。
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Facebook的Fyn Denmark数据中心,面积为56,000平方米,功耗约为40MW;QTC数据中心大约75万平方英尺;而最大的数据中心,这里写的是中国移动在建的,面积为1130万平方英尺,大约是前者的15倍。
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3、现实世界的用例
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资料来源
https://www.snia.org/sites/default/files/ESF/Next-generation-Interconnects-the-Critical-Importance-of-Cables-and-Connectors-Final.pdf
注:本文只代表作者个人观点,与任何组织机构无关,如有错误和不足之处,欢迎在留言中批评指正。如果您想在这个公众号上分享自己的技术干货,也欢迎联系我:)
关键词:连接器与线缆的重要性(啥是电缆连接器)