Can MSCS restore an applications “state” at the time of its failure rather than requiring a complete restart?
MSCS can restore the state of an application’s registry keys, but any other state information must be managed and restored by the application. Applications need to provide some model for persistence to insure that state can be recaptured. For example, Microsoft SQL Server uses transaction logs to provide this assurance. If a server running Microsoft SQL Server crashes, upon restart the application uses its transaction logs to bring the database back to a known state. With a cluster, just as with a single server, good application design and the use of ACID (Atomic, Consistent, Isolated, and Durable) transaction properties are important.
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