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RPC - Click to edit Master subtitle style...

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Click to edit Master subtitle style 8/1/11 Remote Procedure Calls Adam Smith, Rodrigo Groppa, and Peter Tonner
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8/1/11 Outline I. Introduction II. Binding III. Packet Level Protocol IV. Performance
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8/1/11 Introduction
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8/1/11 def: Remote Procedure Calls Procedure call that executes remotely (in this paper) single threaded caller waits for return of function Abstraction of message passing  Simple syntax and simple semantics
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8/1/11 Environment (old computers) Cedar programming environment Dorados 24 bit virtual address space 80 Mb disk Mesa, Smalltalk, InterLisp
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8/1/11 Aims “Make distributed computation easy” Make remote programming nearly as easy as making local procedure calls Keep efficiency within 5 times the network latency Use secure communication with encryption
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8/1/11 Fundamental Decisions RPC vs Message Passing same problems, same solutions Mesa : based on procedural control flow Fork  adds no significant complexity No shared address space requires extension of address space with  network location
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8/1/11 Terms of RPC Caller and callee Interface Modules list of functions with parameter and return  types Export – define functions Import – use functions of an interface
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8/1/11 Structure User, User Stub, RPCRuntime, Server,  Server Stub Stub Pack and unpack arguments and results RPCRuntime exists on both machines transmit messages from caller to callee
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8/1/11 More Structure
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8/1/11 II. Binding Naming specify what a client should be bound to by the RPC Runtime Location
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8/1/11 Naming
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