NDLI: Adding PEP to real-time distributed commit processing

Content Provider	IEEE Xplore Digital Library
Author	Haritsa, J.R. Ramamritham, K.
Copyright Year	2000
Description	Author affiliation: Supercomput. Educ. & Res. Centre, Indian Inst. of Sci., Bangalore, India (Haritsa, J.R.)
Abstract	One-phase commit protocols substantially reduce the overheads of transaction commit processing, making them attractive for incorporation in distributed real-time databases. A major obstacle, however is that these protocols significantly increase the occurrence of priority inversions. This arises from the cohorts of each distributed transaction being in a prepared state for extended periods of time, during which their data locks cannot be pre-empted. We present a new one-phase real-time commit protocol, called PEP (short for PROMPT-EP, where PROMPT = "Permits Reading Of Modified Prepared-data for Timeliness", which is a real-time commit protocol, and EP = "Early Prepare", which is a one-phase commit protocol). PEP addresses the above-mentioned problem by suitably utilizing our previously proposed prepared data-borrowing technique. A simulation-based evaluation of PEP for real-time applications with firm deadlines demonstrates that, for a variety of environments, it substantially reduces the number of killed transactions as compared to its multi-phase counterparts. In fact, PEP often provides better performance than even an equivalent centralized system.
Starting Page	37
Ending Page	46
File Size	975462
Page Count	10
File Format	PDF
ISBN	0769509002
ISSN	10528725
DOI	10.1109/REAL.2000.895994
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Data processing Database systems Real time systems Distributed databases Transaction databases Writing Computer science Communication system control
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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