System and method for providing bandwidth congestion control in a private fabric in a high performance computing environment

A method for providing bandwidth congestion control in a private fabric in a high performance computing environment, comprising:

• providing, at computer comprising one or more microprocessors, a first subnet, the first subnet comprising,
• a plurality of switches, and
• a plurality of host channel adapters, wherein the plurality of host channel adapters are interconnected via the plurality of switches,
• defining a plurality of target groups within the subnet, each target group being defined at a specific portion of the subnet;
• defining, by each target group, respectively, a bandwidth limit for the associated specific portion of the subnet;
• storing a record of each of the plurality of target groups at a target group repository of a host channel adapter of the plurality of host channel adapters;
• and
• wherein two or more concurrent flows, each having a respective flow rate, are subjected to a bandwidth limit of at least one target group simultaneously.

A non-transitory computer readable storage medium having instructions thereon for providing bandwidth congestion control in a private fabric in a high performance computing environment, which when read and executed cause a computer to perform steps comprising:

• providing, at computer comprising one or more microprocessors, a first subnet, the first subnet comprising,
• a plurality of switches, and
• a plurality of host channel adapters, wherein the plurality of host channel adapters are interconnected via the plurality of switches,
• defining a plurality of target groups within the subnet, each target group being defined at a specific portion of the subnet;
• defining, by each target group, respectively, a bandwidth limit for the associated specific portion of the subnet;
• storing a record of each of the plurality of target groups at a target group repository of a host channel adapter of the plurality of host channel adapters;
• and
• wherein two or more concurrent flows, each having a respective flow rate, are subjected to a bandwidth limit of at least one target group simultaneously.