FAILOVER SYSTEM AND METHOD

摘要

One aspect of the present invention provides a system for failover compri sing at least one client selectively connectable to one of at least two inte rconnected servers via a network connection. In a normal state, one of the s ervers is designated a primary server when connected to the client and a rem ainder of the servers are designated as backup servers when not connected to the client. The at least one client is configured to send messages to the p rimary server. The servers are configured to process the messages using at l east one service that is identical in each of the servers. The services are unaware of whether a server respective to the service is operating as the pr imary server or the backup server. The servers are further configured to mai ntain a library, or the like, that indicates whether a server is the primary server or a server is the backup server. The services within each server ar e to make external calls via its respective library. The library in the prim ary server is configured to complete the external calls and return results o f the external calls to the service in the primary server and to forward res ults of the external calls to the service in the backup server. The library in the secondary server does not make external calls but simply forwards the results of the external calls, as received from the primary server, to the service in the secondary server when requested to do so by the service in th e secondary server.