Programming method and apparatus for core routing and switching system

A programming apparatus for a core routing and switching system, comprising:

• an obtaining module, configured to obtain a number of routing nodes and a number of resource types in each routing node in the core routing and switching system;
• a first judging module, configured to judge whether a first requirement of a user for resources in the routing nodes in the core routing and switching system is changed to a second requirement of the user;
• a second judging module, configured to judge whether resources in a first routing node group corresponding to the first requirement meet the second requirement if the first requirement is changed to the second requirement;
• a searching module, configured to search for a plurality of second routing node groups with resources meeting the second requirement in the core routing and switching system if the resources in the first routing node group do not meet the second requirement;
• a calculating module, configured to calculate a plurality of migration overheads corresponding to the plurality of second routing node groups;
• a selecting module, configured to select a second routing node group corresponding to a smallest migration overhead from the plurality of second routing node groups as a server node for providing a service for a task corresponding to the second requirement.

A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of an apparatus, causes the apparatus to perform a programming method for a core routing and switching system, wherein the method comprises steps of:

• obtaining a number of routing nodes and a number of resource types in each routing node in the core routing and switching system;
• judging whether a first requirement of a user for resources in routing nodes in the core routing and switching system is changed to a second requirement of the user;
• judging whether resources in a first routing node group corresponding to the first requirement meet the second requirement if the first requirement is changed to the second requirement;
• searching for a plurality of second routing node groups with resources meeting the second requirement in the core routing and switching system if the resources in the first routing node group do not meet the second requirement;
• calculating a plurality of migration overheads corresponding to the plurality of second routing node groups;
• selecting a second routing node group corresponding to a smallest migration overhead from the plurality of second routing node groups as a server node for providing a service for a task corresponding to the second requirement.