Advances in Databases and Information Systems: Proceedings by Jānis Bārzdiņš, Ilona Etmane, Audris Kalniņš, Kārlis

By Jānis Bārzdiņš, Ilona Etmane, Audris Kalniņš, Kārlis Podnieks (auth.), Dr. Prof. Johann Eder, Dr. of Sci., Prof. Leonid A. Kalinichenko (eds.)

This quantity effects from the general periods of the second one foreign Workshop of the Moscow ACM SIGMOD bankruptcy "Advances in Databases and data platforms" (ADBIS'95) that came about 27th-30th June 1995, in Moscow, Russia. ADBIS'95 keeps a sequence of annual Workshops on Advances in Databases and knowledge platforms equipped via the Moscow ACM SIGMOD bankruptcy in cooperation with the Russian Founda­ tion for simple study. previous profitable ADBIS meetings comprise the ADBIS'93 and ADBIS'94 Workshops that came about in Moscow. The goals of those workshops are to supply a discussion board for the presentation and in-depth dialogue of complicated examine instructions that would successfully enhance the construction and use of destiny info structures and to extend communique among the japanese and Western learn groups that have been previously separated and also have basically infrequent chances to engage. bettering of the contacts and alternate of rules among researchers from the East and from the West will ultimately result in larger collaboration among them. The ADBIS'95 demand Submissions attracted 60 submissions from 15 international locations of which 35 submissions have been approved for presentation on the usual classes, nine as posters, and seven as displays for a unique consultation for the knowledge structures for technology. This quantity includes the papers awarded within the normal sessions.

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Additional info for Advances in Databases and Information Systems: Proceedings of the Second International Workshop on Advances in Databases and Information Systems (ADBIS’95), Moscow, 27–30 June 1995

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Basarab, B. V. Gubsky, N. S. Nikitchenko, and V. N. Red'ko. Composition models of databases. In Proc. Extending Inf. Syst. Technology, II Int. East- West Database Workshop, Sept. 25-28, Klagenfurt, Austria, pages 155-163, 1994. [6] B. V. Gubsky, V. N. Red'ko. Semantics of data manipulation languages: composition approach. In Proc. 12th international seminar on DBMS, Oct. 17-20, Suzdal, USSR, pages 65-76, 1989. [7] C. B. Jones. Software development: a rigorous approach. Prentice-Hall International, 382 p, 1980.

The primary performance goal is to minimize average response time or maximize the total number of completed transactions per unit time (throughput). Thus, the system performance is optimised in an "average" sense [11]. In conventional real-time systems the main attention is focused on the timing constraints of individual computations (tasks) while data consistency is of less importance [5]. The performance goal 28 of RTDBS is to optimise performance metrics related to timing constraints of individual transactions while maintaining also data consistency constraints.

In the nested transaction model introduced in [8], each transaction can initiate any number of nested transactions that are executed independently, but all the nested transactions should terminate (commit or abort) before the parent transaction. If the child transaction committs, its parent transaction can restart it, or ignore, or start the contingency subtransaction, or deside to abort. This model implies partial refusing from atomicity and durability. In the Sagas model [3] each transaction is divided into relatively independent steps, for each of these steps the compensating transaction is defined.

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