RETCP: A ratio estimation approach for data center incast applications

TCP incast has deep impairments to the performance of today´s data center applications, especially in many-to-one communication patterns. The impairments can be recognized as gross under-utilization of link capacity, high latency and packets loss rate, which due to the RTO mechanism of TCP proposed last century and the complex applications which have strict demand in performance in data center environment. We propose a delay-based novel and adaptive mechanism for TCP incast prevention in data center applications without modifying the switch or router. Theoretical analysis and simulation results show significant performance improvement as compared with existing methods.