Study of TCP Packet Labeling to Alleviate Time-Out
Journal Title: INTERNATIONAL JOURNAL OF COMPUTER TRENDS & TECHNOLOGY - Year 2014, Vol 8, Issue 4
Abstract
Many applications (e.g., cluster based storage and Map Reduce) in modern data centers require a high fan-in, many- to-one type of data communication (known as TCP in cast), which could cause severe in cast congestion in switches and result in TCP good put collapse, substantially degrading the application performance. The root cause of such a collapse is the long idle period of the Retransmission Timeout (RTO) that is triggered at one or more senders by packet losses in congested switches. In this paper We Study a packet labeling scheme PLATO, which improves the loss detection capabilities of New Reno using an innovative packet labeling system. Packets carrying this special label are preferentially en queued, at the switch. This allows TCP to detect packet loss using three duplicate acknowledgements, instead of the time expensive RTO; thus avoiding the good put col- lapse. PLATO makes minor modifications to New Reno and does not alter its congestion control mechanism. The implementation and simulations have been done in Network Simulator 3 (NS3). PLATO’s performance is significantly better than New Reno as well as state-of-art in cast solutions In cast Control TCP (ICTCP) and Data Center TCP (DCTCP). We also show that TCP PLATO can be implemented using commodity switches with Weighted Random Early Detection (WRED) function.
Authors and Affiliations
Vaishali R . Thakare , Prof. Aanand B. Deshmukh
Keywords
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