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arXiv · 1310.4575

ABS-NET: Fully Decentralized Runtime Adaptation for Distributed Objects

Karl Palmskog·Mads Dam·Andreas Lundblad·Ali Jafari
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Abstract

We present a formalized, fully decentralized runtime semantics for a core subset of ABS, a language and framework for modelling distributed object-oriented systems. The semantics incorporates an abstract graph representation of a network infrastructure, with network endpoints represented as graph nodes, and links as arcs with buffers, corresponding to OSI layer 2 interconnects. The key problem we wish to address is how to allocate computational tasks to nodes so that certain performance objectives are met. To this end, we use the semantics as a foundation for performing network-adaptive task execution via object migration between nodes. Adaptability is analyzed in terms of three Quality of Service objectives: node load, arc load and message latency. We have implemented the key parts of our semantics in a simulator and evaluated how well objectives are achieved for some application-relevant choices of network topology, migration procedure and ABS program. The evaluation suggests that it is feasible in a decentralized setting to continually meet both the objective of a node-balanced task allocation and make headway towards minimizing communication, and thus arc load and message latency.

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Karl Palmskog, Mads Dam, Andreas Lundblad, Ali Jafari. 2013-10-17. ABS-NET: Fully Decentralized Runtime Adaptation for Distributed Objects. https://doi.org/10.4204/eptcs.131.8

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