NDLI: A data priority reload technique for real-time main memory databases

Content Provider	IEEE Xplore Digital Library
Author	Jing Huang Gruenwald, L.
Copyright Year	1996
Description	Author affiliation: Sch. of Comput. Sci., Oklahoma Univ., Norman, OK, USA (Jing Huang)
Abstract	A data priority reload algorithm is proposed for real time main memory database systems that allows transaction processing to be resumed before the entire database is recovered from a system failure. Transaction execution priority, reload priority and reload preemption are taken into account during the reload process; this enables transactions with high execution priorities to have more opportunities to meet their deadlines and thus enhances the overall system performance. This algorithm also gives temporal data a higher reload priority than persistent data so that many temporal data can be used before losing their validity, which in turn minimizes the number of transactions aborted or delayed due to invalid data access. Based on the simulation results obtained, we can draw the following conclusions: the data priority reload algorithm provides a significant performance improvement over the conventional reload approach; whether the efficiency of different reload algorithms is crucial to the overall performance mainly depends on the system load, database size and system failure rate; the key factors of the design of real time MMDB reload algorithms are system unavailability, transaction execution priority, and reload threshold. In order to derive an efficient reload scheme, these factors must be studied carefully.
Starting Page	96
Ending Page	101
File Size	666484
Page Count	6
File Format	PDF
ISBN	0818674962
ISSN	10683070
DOI	10.1109/EMWRTS.1996.557825
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transaction databases Checkpointing Database systems Real time systems Resumes Degradation System performance Timing Terminology Performance analysis
Content Type	Text
Resource Type	Article

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