Network congestion management systems and methods

摘要

Systems, methods and software useful for overcoming network congestion problems including head-of-line blocking issues and other network congestion problems. In certain aspects, flow control mechanisms implemented in a switch device or other network device manage buffer and system level resources using a scheduler to control the amount of data requested from a local SAN fabric. Switches and other network devices configured according to the present invention monitor each individual SCSI task, and are configured to apply flow control measures to each active session when buffering resources become scarce, such as when buffering data for a slower-speed WAN link or TCP/IP based interconnects of any speed.

主权项

1. A network switch device comprising:
a processor; a control module executed on the processor, the control module configured to:
determine a forwarding rate at which requests sent between requesting devices and destination devices are forwarded to the destination devices, wherein the requests identify data to be returned to the requesting devices over at least one network link, wherein the forwarding rate is based on the amount of data to be returned to the requesting devices by the destination devices, and wherein the forwarding rate is determined prior to the requests being forwarded by the control module to the destination devices;determine for each request, the amount of requested data to be returned;determine a rate limit based on a data transfer rate of the at least one network link; andinsert a time delay between the requests forwarded to the destination devices based on the rate limit.