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Random I/O Scheduling in Online Tertiary Storage Systems.

Bruce Hillyer, Abraham Silberschatz: Random I/O Scheduling in Online Tertiary Storage Systems. SIGMOD Conference 1996: 195-204
@inproceedings{DBLP:conf/sigmod/HillyerS96,
  author    = {Bruce Hillyer and
               Abraham Silberschatz},
  editor    = {H. V. Jagadish and
               Inderpal Singh Mumick},
  title     = {Random I/O Scheduling in Online Tertiary Storage Systems},
  booktitle = {Proceedings of the 1996 ACM SIGMOD International Conference on
               Management of Data, Montreal, Quebec, Canada, June 4-6, 1996},
  publisher = {ACM Press},
  year      = {1996},
  pages     = {195-204},
  ee        = {http://doi.acm.org/10.1145/233269.233332, db/conf/sigmod/HillyerS96.html},
  crossref  = {DBLP:conf/sigmod/96},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

New database applications that require the storage and retrieval of many terabytes of data are reaching the limits for disk-based storage systems, in both cost and scalability. These limits provide a strong incentive for the development of databases that augment disk storage with technologies better suited to large volumes of data. In particular, the seamless incorporation of tape storage into database systems would be of great value. Tape storage is two orders of magnitude more efficient than disk in terms of cost per terabyte and physical volume per terabyte; however, a key problem is that the random access latency of tape is three to four orders of magnitude slower than disk. Thus, to incorporate a tape bulk store in an online storage system, the problem of tape access latency must be solved. One approach to reducing the latency is careful I/O scheduling. The focus of this paper is on efficient random I/O scheduling for tape drives that use a serpentine track layout, such as the Quantum DLT and the IBM 3480 and 3590. For serpentine tape, I/O scheduling is problematic because of the complex relationships between logical block numbers, their physical positions on tape, and the time required for tape positioning between these physical positions. The results in this paper show that our scheduling schemes provide a significant improvement in the latency of random access to serpentine tape.

Copyright © 1996 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.


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H. V. Jagadish, Inderpal Singh Mumick (Eds.): Proceedings of the 1996 ACM SIGMOD International Conference on Management of Data, Montreal, Quebec, Canada, June 4-6, 1996. ACM Press 1996 BibTeX , SIGMOD Record 25(2), June 1996
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References

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Referenced by

  1. Olav Sandstå, Roger Midtstraum: Improving the Access Time Performance of Serpentine Tape Drives. ICDE 1999: 542-551
  2. Achim Kraiss, Peter Muth, Michael Gillmann: Tape-Disk Join Strategies under Disk Contention. ICDE 1999: 552-559
  3. Bruce Hillyer, Rajeev Rastogi, Abraham Silberschatz: Scheduling and Data Replication to Improve Tape Jukebox Performance. ICDE 1999: 532-541
  4. Achim Kraiss, Gerhard Weikum: Integrated Document Caching and Prefetching in Storage Hierarchies Based on Markov-Chain Predictions. VLDB J. 7(3): 141-162(1998)
  5. Theodore Johnson, Ethan L. Miller: Performance Measurements of Tertiary Storage Devices. VLDB 1998: 50-61
  6. Achim Kraiss, Gerhard Weikum: Vertical Data Migration in Large Near-Line Document Archives Based on Markov-Chain Predictions. VLDB 1997: 246-255
  7. Jie-Bing Yu, David J. DeWitt: Query Pre-Execution and Batching in Paradise: A Two-Pronged Approach to the Efficient Processing of Queries on Tape-Resident Raster Images. SSDBM 1997: 64-78
BibTeX
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