Critical issues in multidatabase systems
نویسندگان
چکیده
منابع مشابه
Critical issues in multidatabase systems
For many applications. a multidataha.<;e approach constitutes an attractive a1t.emative to a single, integrated data.ba.o;e. In lhis paper we describe our experiences gained in Ute COUlf:.e of the development of experimental muHidataba.sesystems: OMNIBASE, at the University of Houston and InlerBase at Purdue University. We concentrate on the problems of query processing and multidalabase transa...
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A multidatabase consists of a collection of autonomous local databases. Systems used to manage multidatabases are called multidatabase systems (MDBSs). In such a system, global transactions are executed under the control of the MDBS. Independently, local transactions are submitted directly to a local DBS (LDBS) by local applications. An MDBS should provide a mechanism to globally manage transac...
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The aspect of security needs more consideration in the area of architectures for multidatabase systems. Particularly, the authentication of users which is a main prerequisite for a successful authorization is not considered sufficiently in current architectures. Due to the autonomy and heterogeneity of the component database systems, the problem of authentication in multidatabase systems is mor...
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Despite the interest in multidatabase systems, research in multidatabase query optimization (MQO) has been scarce. Many researchers perceive the diiculty to be the lack of reliable cost estimates for autonomous component databases. Consequently, some have suggested that this problem degenerates to a distributed query optimization (DQO) problem once cost model coeecients for component databases ...
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ژورنال
عنوان ژورنال: Information Sciences
سال: 1991
ISSN: 0020-0255
DOI: 10.1016/0020-0255(91)90090-h