TY - EJOU AU - Wang, Jin AU - Yuan, Dongzhi AU - Luo, Wangqing AU - Rao, Shuying AU - Sherratt, R. Simon AU - Hu, Jinbin TI - Congestion Control Using In-Network Telemetry for Lossless Datacenters T2 - Computers, Materials \& Continua PY - 2023 VL - 75 IS - 1 SN - 1546-2226 AB - In the Ethernet lossless Data Center Networks (DCNs) deployed with Priority-based Flow Control (PFC), the head-of-line blocking problem is still difficult to prevent due to PFC triggering under burst traffic scenarios even with the existing congestion control solutions. To address the head-of-line blocking problem of PFC, we propose a new congestion control mechanism. The key point of Congestion Control Using In-Network Telemetry for Lossless Datacenters (ICC) is to use In-Network Telemetry (INT) technology to obtain comprehensive congestion information, which is then fed back to the sender to adjust the sending rate timely and accurately. It is possible to control congestion in time, converge to the target rate quickly, and maintain a near-zero queue length at the switch when using ICC. We conducted Network Simulator-3 (NS-3) simulation experiments to test the ICC’s performance. When compared to Congestion Control for Large-Scale RDMA Deployments (DCQCN), TIMELY: RTT-based Congestion Control for the Datacenter (TIMELY), and Re-architecting Congestion Management in Lossless Ethernet (PCN), ICC effectively reduces PFC pause messages and Flow Completion Time (FCT) by 47%, 56%, 34%, and 15.3×, 14.8×, and 11.2×, respectively. KW - Data center; lossless networks; congestion control; head of line blocking; in-network telemetry DO - 10.32604/cmc.2023.035932