Catch the Whole Lot in an Action: Rapid Precise Packet Loss Notification in Data Center
Catch the Whole Lot in an Action: Rapid Precise Packet Loss Notification in Data Center
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发表时间：
2014-04
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通讯作者：
Peng Cheng;Fengyuan Ren;Ran Shu;Chuang Lin
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作者：
Peng Cheng;Fengyuan Ren;Ran Shu;Chuang Lin
在大规模数据中心中，越来越多的TCP性能问题包括TCP Incast，TCP流出和长期查询完成时间。我们证明了这些问题的根本原因是现有技术无法维持自我锁定或获得准确和快速的数据包丢失通知。我们提出切割有效载荷（CP），该机制只是将数据包的有效载荷放在超载开关中，以及类似麻袋的精确ACK（PACK）机制，以准确地将发送者告知丢失的数据包。实验表明，CP成功解决了TCP性能问题的根本原因。此外，CP与数据中心网络中使用的其他TCP变体配合得很好。
An increasing number of TCP performance issues including TCP Incast, TCP Outcast, and long query completion times are common in large-scale data centers. We demonstrate that the root cause of these problems is that existing techniques are unable to maintain self-clocking or to achieve accurate and rapid packet loss notification. We present cutting payload (CP), a mechanism that simply drops a packet's payload at an overloaded switch, and a SACK-like precise ACK (PACK) mechanism to accurately inform senders about lost packets. Experiments demonstrate that CP successfully addresses the root cause of TCP performance issues. Furthermore, CP works well with other TCP variants used in data center networks.