NDLI: A window-based object allocation and replication algorithm for real-time distributed database systems in mobile computing environment

Content Provider	IEEE Xplore Digital Library
Author	Wujuan Lin Veeravalli, B.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore (Wujuan Lin; Veeravalli, B.)
Abstract	A real-time distributed database system (RTDDBS) must maintain the consistency constraints of objects and must also guarantee the deadline imposed by each arriving request. Servicing these requests may incur I/O costs, control-message transferring costs or data-message transferring costs. In this paper, we consider our system in the mobile computing environment, where the link bandwidth is very limited and hence the transfer of data-messages and control-messages over the wireless network incurs very high cost when compared to I/O cost. Thus, we present a mathematical model that considers the communication costs (control-message/data-message transferring cost) associated with the servicing of a request. Using this cost model, our objective is to service the arriving requests on or before their respective deadline periods and minimize the total communication cost. To this end, we design an adaptive object allocation and replication algorithm, referred to as real-time distributed dynamic window mechanism (RDDWM), that adapts to the random patterns of read-write requests. Using competitive analysis, we study the performance of RDDWM algorithm under two extreme conditions.
Starting Page	491
Ending Page	499
File Size	615485
Page Count	9
File Format	PDF
ISBN	0780387988
DOI	10.1109/GLOCOMW.2004.1417627
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Algorithm design and analysis Costs Communication system control Bandwidth Control systems Database systems Computer networks Distributed computing Mobile computing
Content Type	Text
Resource Type	Article

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