Checking the Integrity Constraints of Mobile Databases with Three-Level Model

Autor:	Zarina Dzolkhifli, Hamidah Ibrahim, Praveen Madiraju
Rok vydání:	2008
Předmět:	Computer science Process (engineering) business.industry Data integrity Distributed computing Mobile database Mobile computing Wireless State (computer science) business Mobile device Host (network)
Zdroj:	Lecture Notes in Computer Science ISBN: 9783540705031 BNCOD
DOI:	10.1007/978-3-540-70504-8_18
Popis:	In a mobile environment, due to the various constraints inherited from limitations of wireless communication and mobile devices, checking for integrity constraints to maintain the consistent state of mobile databases is an important issue that needs to be addressed. Hence, in this paper we propose Three-Level (3-L) model, wherein the process of constraint checking is realized at three different levels. Here, we use sufficient and complete tests together with the idea of caching relevant data items during the relocation period for checking the integrity constraints. This has improved the checking mechanism by preventing delays during the process of checking constraints and performing the update. Also, the 3-L model reduces the amount of data accessed given that much of the tasks are performed at the mobile host. Hence, our model speeds up the checking process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ed11c8da0ff1219ef89966d852dae435 https://doi.org/10.1007/978-3-540-70504-8_18 Zobrazit plný text záznamu