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The number of open source database management systems (DBMS) currently available leave a potential user with the difficult decision of choosing the appropriate system that suits his particular requirements. This paper describes a software platform that allows a potential open source database management system user to carry out a performance evaluation on various open source relational database ...

Distributed database system acts like NFS (Network File System) for database system. The system allows transparent access to databases running on other servers on the network. The SPring-8 database system has grown since the commissioning in 1997. A single database server becomes harder to handle new requirements like very fast data storage and data mining from huge sized archived data. Distrib...

The handling of unstructured data in database management system is very difficult. The managing unstructured data like image, video textual data etc. are not easy task in database system. In this work a concept of cloud algebra introduced to handle unstructured data in CDBMS. The most popular concept, relational algebra is used in relational database management system. The relational algebra is...

We argue that a fully object-oriented database management system is a very suitable basis of every modern CASE environment. We describe how the features provided by an OODBMS are exploited to build a CASE tool or environment. We discuss especially problems concerning inter-document consistency constraints and multiuser support. We nally sketch the features which are still missing in OODBMSs.

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Database systems are widely used in heterogeneous applications. However, it is difficult to decide which database management system meets requirements of a certain application best. This observation is even more true for scientific and statistical data management, because new application and research fields are often first observed in this domain. New requirements are often implied to data mana...

Aggregation is an important concept in database design where composite objects can be modelled during the design of database applications. Therefore, preserving the aggregation concept in database implementation is essential. In this paper, we propose models for implementation of aggregation in an Object-Relational Database Management System (ORDBMS) through the use of index clusters and nested...