Abstract
An integrated storage platform for open systems should be able of meeting the requirements of deterministic applications, multimedia systems, and traditional best-effort applications. It should also provide a disk scheduling mechanism fitting all those types of applications. In this paper, we propose a three-level hierarchical disk scheduling scheme, which has three main components: metascheduler, single server scheduler, and disk scheduler. The metascheduler provides scheduling mechanisms for a parallel disk system or a set of parallel servers. The server level is divided in three main queues: deterministic, statistic and best-effort requests. Each server may have its own scheduling algorithm. The lower level, disk driver, chooses the ready streams using its own scheduling criteria. Those systems have been implemented and tested, and the performance evaluations demonstrate that our scheduling architecture is adequate for handling stream sets with different timing and bandwidth requirements.
This work has been supported in part by the NSF Award CCR-9357840, the contract DABT63-94-C-0049 from DARPA and by the Spanish CICYT under the project TIC97-0955
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Fernández, J., García, F., Carretero, J. (2001). Enhancing Parallel Multimedia Servers through New Hierarchical Disk Scheduling Algorithms. In: Palma, J.M.L.M., Dongarra, J., Hernández, V. (eds) Vector and Parallel Processing — VECPAR 2000. VECPAR 2000. Lecture Notes in Computer Science, vol 1981. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44942-6_7
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DOI: https://doi.org/10.1007/3-540-44942-6_7
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