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M. Hecht, Y. He, X. An, "Fault Tolerance for Real Time Monitoring and Control
Under the Windows NT Operating System and the Common Object Model", International
Conference on Dependable Systems and Networks, June, 2000
This paper describes a OFTT (OLE Fault Tolerance Technology), fault-tolerant PC-based
middleware layer running on the Micrrosoft Windows NT operating system that provides
nearly transparent hot/standby redundancy for networked PCs. The middleware layer
is built using the Microsoft Common Object Model (COM) and consists of components
that enable the transfer of data among a redundant pair of applications by means
of a thread running in an associated Dynamic Link Library (DLL). The demonstration
will show how it is possible to easily build an application running with dual redundancy
out of a single string (non-fault tolerant) application and will also demonstrate
that this application is capable of withstanding failures of the hardware, system
software, middleware, and other application software components. The ease with which
this technology can be implemented represents the primary innovation. It is hoped
that by making fault tolerance more compatible with conventional software architectures,
more reliable PC-based monitoring and control systems can be implemented.
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