RDC: Energy-Efficient Data Center Network Congestion Relief with Topological Reconfigurability at the Edge
RDC: Energy-Efficient Data Center Network Congestion Relief with Topological Reconfigurability at the Edge
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发表时间：
2022
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通讯作者：
Weitao Wang;Dingming Wu;Sushovan Das;Afsaneh Rahbar;Ang Chen;T. S. E. Ng
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作者：
Weitao Wang;Dingming Wu;Sushovan Das;Afsaneh Rahbar;Ang Chen;T. S. E. Ng
无机架数据中心（RDC）是一种新型的网络架构，它从逻辑上消除了传统数据中心的机架边界及其带来的低效率问题。随着现代应用产生越来越多的机架间流量，传统架构面临核心争用、机架间带宽利用不平衡以及网络路径过长等问题。RDC通过使服务器能够在运行时在逻辑上跨机架边界移动来解决这些限制。我们的设计通过在ToR交换机和服务器之间的网络边缘插入电路交换机来实现这一点，并通过重新配置电路来根据流量模式跨机架重新分组服务器。我们已经在硬件测试平台和数据包级仿真中对RDC进行了广泛的评估，结果表明，RDC可以将4：1的超额订购网络的速度提高1.78× 103.9 × 3.9倍，用于实际应用，在大规模仿真中超过10倍;此外，RDC的性能比传统的无阻塞网络高出2.4倍。
The rackless data center (RDC) is a novel network architecture that logically removes the rack boundary of traditional data centers and the inefficiencies that come with it. As modern applications generate more and more inter-rack traffic, the traditional architecture suffers from contention at the core, imbalanced bandwidth utilization across racks, and longer network paths. RDC addresses these limitations by enabling servers to logically move across the rack boundary at runtime. Our design achieves this by inserting circuit switches at the network edge between the ToR switches and the servers, and by reconfiguring the circuits to regroup servers across racks based on the traffic patterns. We have performed extensive evaluations of RDC both in a hardware testbed and packet-level simulations and show that RDC can speed up a 4:1 oversubscribed network by 1.78×∼ 3.9× for realistic applications and more than 10× in large-scale simulation; furthermore, RDC is up to 2.4× better in performance per watt than a conventional non-blocking network.