Patent ID: 7293192
Filing Date: 2007-11-06
Classification: G06F

Abstract:
1. A method for switching a client from a primary server to backup server comprising: establishing a first connection from a client to a primary server; sending a message from said client to said primary server via said first connection for processing by said primary server; prior to receiving an expected response to said message at said client, experiencing a failure of said primary server at said client whereby said first connection fails; requesting initiation of a second connection from said client to a backup server; confirming, at said backup server, that said primary server has failed; sending a recovery signal from said backup server to said client representing an acknowledgement of said request to initiate said second connection; receiving said recovery signal at said client; sending said message to said backup server via said second connection for processing by said backup server; and, if said backup server contains results of processing said message as previously processed by said primary server prior to failure of said primary server, then sending said results from said backup server to said client; or if said backup server does not contain results of processing said message by said primary server then processing said message at said backup server and sending said results thereof from said backup server to said client.