Apparatus and method for performing an online software upgrade of resource servers

摘要

A switch for handling call connections between calling devices and called devices. The switch comprises: 1) at least one system management node associated with a configuration management controller, the configuration management controller for performing an online upgrade of software in the switch by loading upgraded software in a new partition while original software is executed in a reference partition; and 2) a plurality of computing nodes for executing primary-backup resource server applications. Each of the primary-backup resource server applications comprises a primary resource server application and a secondary resource server application residing on a different node than the primary resource server application. A plurality of the primary-backup resource server applications form a resource group and an address of the resource group is known in the reference partition and in the new partition.