Optimistic recovery in distributed systems
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Derivatives are introduced to provide optimistic computation as programming language construct. The motivation is in avoiding communication latency in wide-area distributed computing environments. A derivative represents a handle on a value that has not yet been received, where moreover the potential receiver may make assumptions about the value in order to proceed. Derivatives can therefore be seen as a generalization of futures and promises, which have also been introduced in order to deal with latency. A programming language, type system and operational semantics are provided supporting optimistic execution.