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Implementing location independent invocation

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2 Author(s)
A. P. Black ; Digital Equipment Corp., Littleton, MA, USA ; Y. Artsy

The problems of finding objects in large and wide-area networks where objects may change their location in volatile memory as well as on stable storage are presented. The authors discuss possible solutions and describe those adopted in the Hermes system (a corporate wide, real life office application). They have designed and developed a location-independent-invocation (LII) mechanism that combines finding with invocation, using temporal location information. The mechanism also updates the system's knowledge of an object's location as a side-effect of invocation and object migration. Assumptions about object mobility indicate that objects are likely to be found within a few propagations of an invocation. If they cannot be found in this way, stable-storage and name services are used to locate the object. The major contribution of this work is to show how LII can be achieved in a large and dynamic environment in which objects are supported by neither are operating system nor the programming language

Published in:

IEEE Transactions on Parallel and Distributed Systems  (Volume:1 ,  Issue: 1 )