Data center network flow migration method and system thereof

A flow migration system for a data center network, the system comprising:

• a plurality of switches being interconnected according to topology information;
• and
• a controller connected to the plurality of switches;
• wherein the controller detects a utilized loading value in each switch of the plurality of switches in the data center network according to the topology information of the data center network, the controller is configured to re-establish a plurality of link paths corresponding to the plurality of switches in the data center network according to the utilized loading value in each switch and a disjoint edge node divided spanning tree algorithm, and when the utilized loading value of at least one link path is greater than a threshold value in the re-established link paths corresponding to the plurality of switches in the data center network, the at least one link path with the utilized loading value greater than the threshold value is rerouted by the controller according to a flow migration algorithm, wherein a computational complexity of the disjoint edge node divided spanning tree algorithm approaches O(N S3), N S being the number of the switches in the data center network, and O(•) being the function of computational complexity (big O).