Constant Time Permutation: An Efficient Block Allocation Strategy for Variable-Bit-Rate Continuous Media Data.
Yueh-Min Huang, Jen-Wen Ding, Shiao-Li Tsao:
Constant Time Permutation: An Efficient Block Allocation Strategy for Variable-Bit-Rate Continuous Media Data.
VLDB J. 8(1): 44-54(1999)@article{DBLP:journals/vldb/HuangDT99,
author = {Yueh-Min Huang and
Jen-Wen Ding and
Shiao-Li Tsao},
title = {Constant Time Permutation: An Efficient Block Allocation Strategy
for Variable-Bit-Rate Continuous Media Data},
journal = {VLDB J.},
volume = {8},
number = {1},
year = {1999},
pages = {44-54},
ee = {db/journals/vldb/HuangDT99.html},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX
Abstract
To provide high accessibility of continuous-media (CM) data, CM servers generally stripe data across multiple disks.
Currently, the most widely used striping scheme for CM data is round-robin permutation (RRP).
Unfortunately, when RRP is applied to variable-bit-rate (VBR) CM data, load imbalance across multiple disks occurs, thereby reducing overall system performance.
In this paper, the performance of a VBR CM server with RRP is analyzed.
In addition, we propose an efficient striping scheme called constant time permutation (CTP), which takes the VBR characteristic into account and obtains a more balanced load than RRP.
Analytic models of both RRP and CTP are presented, and the models are verified via trace-driven simulations.
Analysis and simulation results show that CTP can substantially increase the number of clients supported, though it might introduce a few seconds/minutes of initial delay.
Key Words
Continuous-media server - Video-on-demand (VOD) - Striping - Data placement - Load balancing
Copyright © 1999 by Springer, Berlin, Heidelberg.
Permission to make digital or hard copies of the abstract is granted provided that copies are not made or distributed for profit or
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