Priority-based and Throughput-guaranteed Transport protocol for data center networks

The previous surveys show that more than 90% of the flows in typical data center networks are smaller than 100KB in size, while most bytes transmitted are from a few large flows. The small flows are usually sensitive to their completion times while the large flows require a high throughput. The previous works usually either achieve low completion times for small flows or high throughput for large flows, but not both. In this paper, we propose PTT (Priority-based and Throughput-guaranteed Transport) to minimize the average completion time of small flows while guaranteeing the high throughput of large flows. We conduct comprehensive simulations to evaluate the performance of PTT. The simulation results show that PTT reduces the average completion time of small flows by up to 27.52% over DCTCP and 23.82% over L2DCT while the throughput of large flows is comparable to that in DCTCP, which is 170.46% better than that in L2DCT.