The Synchronous Data Center

The Synchronous Data Center
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同步数据中心

DOI:
10.1145/3317550.3321442
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发表时间:
2019
期刊:
Workshop on Hot Topics in Operating Systems (HotOS
影响因子:
--
通讯作者:
Phan, Linh Thi
Phan, Linh Thi
中科院分区:
--
文献类型:
--
作者:
Yang, Tian;Gifford, Robert;Haeberlen, Andreas;Phan, Linh Thi

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如今,分布式系统通常被设计为很大程度上是异步的。设计者假设网络可能会在不可预测的时间丢弃或显着延迟消息,无法知道节点处理消息的速度或响应的速度,并且不同节点的时钟至多是松散同步的。这些假设当然是安全的,但它们是有代价的:许多应用程序确实需要可预测的性能,在异步系统之上,必须以巨大的成本和大量的冗余来近似,并且异步系统的许多分布式协议比同步协议复杂得多和昂贵得多。本文的目标是开始讨论异步模型是否(仍然)是大多数分布式系统的正确选择,特别是属于单个管理域的分布式系统。我们认为 1) 通过使用 CPS 领域的想法,构建完全同步的数据中心规模的系统在技术上是可行的,并且 2) 与当前设计相比,此类系统将具有几个有趣的优势。
Today, distributed systems are typically designed to be largely asynchronous. Designers assume that the network can drop or significantly delay messages at unpredictable times, that there is no way to know how quickly a node might process a message, or how soon it might respond, and that the clocks of different nodes are at most loosely synchronized. These assumptions are certainly safe, but they come at a price: many applications really do need predictable performance, which, on top of an asynchronous system, has to be approximated at great cost and with lots of redundancy, and many distributed protocols for asynchronous systems are much more complex and expensive than their synchronous counterparts.The goal of this paper is to start a discussion about whether the asynchronous model is (still) the right choice for most distributed systems, especially ones that belong to a single administrative domain. We argue that 1) by using ideas from the CPS domain, it is technically feasible to build datacenter-scale systems that are fully synchronous, and that 2) such systems would have several interesting advantages over current designs.
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