An Integrated Resource Sharing Policy for Multimedia Storage Servers Based on Network-Attached Disks

  • Authors:

  • Nabil J. Sarhan;Chita R. Das

  • Affiliations:

  • -;-

  • Venue:
  • ICDCS '03 Proceedings of the 23rd International Conference on Distributed Computing Systems
  • Year:
  • 2003

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Abstract

In this paper, we propose using the network-attacheddisk (NAD) architecture to design highly scalable andcost-effective multimedia-on-demand (MOD) servers. Inorder to ensure enhanced performance, we propose twoschemes, called distributed interval caching (DIC) andmulti-objective scheduling (MOS). The DIC scheme utilizesthe on-disk buffers for caching intervals between successivestreams, while the MOS scheme improves resource sharingby scheduling requests for service intelligently based onfour predefined criteria. We then integrate the two schemesand study the overall performance benefits through extensivesimulation. We also study the effectiveness of the proposedDIC scheme by developing an analytical model thatestimates the performance limit of DIC. The results demonstratethat the integrated policy works very well in increasingthe number of customers that can be serviced concurrentlywhile decreasing their waiting times, and that theperformance improvements scale with the number of disksin the server.