METHOD FOR SELECTING SHARD LEADER IN SOFTWARE-DEFINED NETWORK

摘要

A method for selecting a shard leader is disclosed. The method for selecting a shard leader is performed by a leader selection module included in a software-defined network system including a plurality of controllers, and comprises the steps of: calculating, at every interval, an available synchronization bandwidth for all controllers, an average required synchronization bandwidth for all shards, and a threshold synchronization bandwidth for all of the controllers; when there is a controller with the threshold synchronization bandwidth being a negative value, selecting a shard having a minimum required synchronization bandwidth among shards in which the corresponding controller operates as a leader, and selecting a controller of which the threshold synchronization bandwidth does not become a negative value even when the controller is selected as a new leader of the corresponding shard; and transferring the leadership of the corresponding shard to a controller selected as a new leader, and updating a leader mapping state.