| EPSRC Reference: |
GR/K55509/01 |
| Title: |
VALIDATION OF THE MASTA I/O COST MODEL FOR DATABASE CRASH RECOVERY MECHANISMS |
| Principal Investigator: |
Munro, Dr D |
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| Department: |
Computational Science |
| Organisation: |
University of St Andrews |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 July 1995 |
Ends: |
31 July 1995 |
Value (£): |
2,220
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| EPSRC Research Topic Classifications: |
| Information & Knowledge Mgmt |
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Summary on Grant Application Form |
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The design of database crash recovery mechanisms on modern computer systems must take account of the relative speed of processors over disks. In these systems disk I/O activity is the dominant expense and the disk transfer time relative to seek time makes patterns of disk access significant. The MaStA (Massachusetts St Andrews) cost model for database crash recovery mechanisms, designed by the authors, provides finer grained distinctions of I/O costs than previous work by being structured independently of machine architectures and application workloads and refining costs in terms of I/O categories, access patterns and application workload parameters. The main features of the model are:+ Cost is based upon a probabilistic estimation of disk activity, broken down into sequential, asynchronous, clustered synchronous, and unclustered synchronous disk accesses for each recovery scheme.+ The model is calibrated by different disk performance characteristics, either measured by experiment or predicted by analysis.+ The model may be used over a wide variety of workloads, including those typical of object-oriented and database programming systems.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.st-and.ac.uk |