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This e-book constitutes the refereed court cases of the 14th foreign convention on wisdom Engineering and information administration, EKAW 2004, held in Whittleburg corridor, united kingdom in October 2004. The 30 revised complete papers and 21 revised brief papers have been conscientiously reviewed and chosen from quite a few submissions.
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Additional resources for 42.Parallel and Distributed Systems
Therefore, dynamic mapping heuristics are usually employed to assign the tasks to machines. Furthermore, the tasks can have deadlines and priorities associated with them. Two types of dynamic approaches are on-line and interval. The on-line approach assigns each task to a machine when it is submitted. The interval approach waits for a set of new tasks to arrive and then maps those tasks and remaps any SUMMARY AND FUTURE DIRECTIONS HETEROGENEOUS DISTRIBUTED COMPUTING In summary, although the use of currently available HC systems demonstrates their significant benefits, most of them require that the programmer have an intimate knowledge of what is involved in mapping the application task(s) onto the suite of machines.
These higher level services would form an adaptive wide area resource environment (AWARE). TAXONOMIES OF HETEROGENEOUS COMPUTING One of the first classifications of HC systems provided in Watson et al. (21) divides systems into mixed-machine HC sys- 683 tems or mixed-mode HC systems. These two categories were defined earlier in this article. Mixed-machine HC systems denote spatial heterogeneity, whereas mixed-mode HC systems denote temporal heterogeneity. Recently, researchers have further refined this classification to obtain different schemes.
2 envisions an automatic HC programming environment. Most components of the model require further research to devise practical and theoretically sound methodologies (2,3,24). A flavor of the work performed in matching and scheduling is also provided in this article. An important question that is particularly relevant to stages 1 and 2 of the conceptual model is, What information can be obtained automatically and what information should be provided by the programmer? The following areas should be further researched to realize the automatic HC environment envisioned in Fig.