Patent
Fault tolerant client server system
Pradeep Bhanot,Paul Jackson +1 more
- 31 May 1996
207
TL;DR: In this article, a client is initially connected to a primary server, and a secondary connection is designated to a backup server, whereby if the primary server ever becomes disabled, the client is automatically switched over to the backup server.
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Abstract: A method for providing fault tolerance in a client/server computer system. A client is initially connected to a primary server. The primary server normally handles all of the client's transactions. However, a secondary connection is designated to a backup server, whereby if the primary server ever becomes disabled, the client is automatically switched over to the backup server. In-flight transaction information corresponding to transactions currently being processed by the primary server is stored and regularly updated by the client. The client regularly polls the primary server to check whether the primary server is properly functioning. If the primary server becomes disabled, all in-flight transactions pending on the disabled server are rolled back and the client resubmits in-flight transaction information to the backup server so that it can complete any transactions which were in progress on the primary server at the time of the failure. Thus, server failures are transparent to the user.
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Citations
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System for reliably connecting a client computer to a server computer
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TL;DR: In this article, a server switching means for realizing server switching in which the backup server computer alternatively executes the server function of the working server computer by virtually setting the address of a working server connected to the network as the address address of the backup computer.
193
References
Patent
Fault tolerant computer system
Drew Major,Kyle Powell,Dale Neibaur +2 more
- 09 Aug 1991
TL;DR: In this paper, the authors propose a software solution for providing a fault-tolerant backup system, such that if there is a failure of a primary processing system, a replicated system can take over without interruption.
374
Patent
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Richard French Clowes,Fred William Tims +1 more
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TL;DR: In this paper, a workstation implemented software which detects failure of a primary file server and reroutes data storage activity to a secondary file server, to be routed via an invention-provided SFS.
218
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Non-disruptive recovery from file server failure in a highly available file system for clustered computing environments
Murthy V. Devarakonda,William A. Kish,Ajay Mohindra +2 more
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TL;DR: In this article, the state information for a file system managed by a server is maintained among a plurality of client nodes of a distributed system and all ongoing requests to server are suspended.
150
Patent
Method and apparatus for network file recovery
Ian J. Stiles
- 26 Jun 1995
TL;DR: In this paper, a method and apparatus for assisting in file recovery after a network fault using a block state indicator in a client cache is presented, where file locks and file semaphores are re-established after network fault.
115
Patent
Fault-tolerant processing system architecture
Margaret A. Burd,Benny J. Ellis,Jennifer T. Fitzgerald,Barbara P. Havens,Jeremy R. Hutt,Janice A. Jones,Timothy J. Lefoley,Gary J. Mayer +7 more
- 01 Sep 1993
TL;DR: A fault-tolerant call-processing adjunct processor comprises a redundant, duplicated, service unit provisioning and maintenance processor, a duplicated LAN connected to both service units, and plurality of served units (voice-processing processors) each connected with both LANs as mentioned in this paper.
37