METHOD, APPARATUS, AND SYSTEM FOR COMMUNICATION IN DATA CENTRE

Disclosed in the embodiments of the present application are a method, an apparatus, and a system for communication in a data centre, the data centre comprising a plurality of servers, a plurality of electric switches, and at least one optical cross-connect device, uplink ports of at least two of the electrical switches being interconnected with the at least one optical cross-connect device; the method comprises: receiving network topology information issued by a topology manager; acquiring a data stream; and, on the basis of the network topology information, configuring a routing policy for the data stream, the routing policy comprising any one or a combination of the following routing policies: a first routing policy, the first routing policy instructing the data stream to be forwarded by means of an optical channel in the at least one optical cross-connect device; a second routing policy, the second routing policy instructing the data stream to be divided into at least two sub data streams for forwarding; a