Detecting Ephemeral Optical Events with OpTel
Detecting Ephemeral Optical Events with OpTel
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发表时间：
2022
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通讯作者：
Congcong Miao;Minggang Chen;Arpit Gupta;Zili Meng;Lianjin Ye;Jingyu Xiao;Jie Chen;Zekun He;Xulong Luo;Jilong Wang;Heng Yu
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作者：
Congcong Miao;Minggang Chen;Arpit Gupta;Zili Meng;Lianjin Ye;Jingyu Xiao;Jie Chen;Zekun He;Xulong Luo;Jilong Wang;Heng Yu
光骨干网络中的退化或故障事件会影响云服务的服务级别协议。及时检测并排除这些事件以最大程度地减少其影响至关重要。现有的遥测系统依靠神秘的工具（例如 SNMP）和供应商特定的控制器来收集光学数据，这会影响这些系统的灵活性和规模。因此，他们无法按时收集所需的数据来及时检测退化或故障事件并对其进行故障排除。本文介绍了 OpTel 的设计和实现，这是一种光学遥测系统，它使用与供应商无关的集中式控制器以流式传输方式收集光学数据。更具体地说，它在光学设备和控制器之间提供灵活的与供应商无关的接口，并将数据管理任务（例如，创建可查询的数据库）从设备转移到控制器。因此，OpTel 能够以一秒的粒度收集细粒度的光学遥测数据。它已在腾讯的光骨干网络中运行了六个月。细粒度的数据收集能够检测短暂事件（即短暂事件）。与现有遥测系统相比，OpTel 能够准确检测 2 倍以上的光学事件。它还可以在几秒钟内排除这些光学事件的故障，这比最先进的技术快了几个数量级。
Degradation or failure events in optical backbone networks affect the service level agreements for cloud services. It is critical to detect and troubleshoot these events promptly to minimize their impact. Existing telemetry systems rely on arcane tools (e.g., SNMP) and vendor-specific controllers to collect optical data, which affects both the flexibility and scale of these systems. As a result, they fail to collect the required data on time to detect and troubleshoot degradation or failure events in a timely fashion. This paper presents the design and implementation of OpTel, an optical telemetry system that uses a centralized vendor-agnostic controller to collect optical data in a streaming fashion. More specifically, it offers flexible vendor-agnostic interfaces between the optical devices and the controller and offloads data-management tasks (e.g., creating a queryable database) from the devices to the controller. As a result, OpTel enables the collection of fine-grained optical telemetry data at the one-second granularity. It has been running in Tencent’s optical backbone network for the past six months. The fine-grained data collection enables the detection of short-lived events (i.e., ephemeral events). Compared to existing telemetry systems, OpTel accurately detects 2 × more optical events. It also enables troubleshooting of these optical events in a few seconds, which is orders of magnitude faster than the state-of-the-art.