Integrating Constraint Management and Concurrency Control in Distributed Databases
نویسندگان
چکیده
Chimera is a novel database language jointly designed by researchers at Politecnico di Milano, Bonn University, and ECRC of Munich in the context of the Esprit Project P6333, IDEA. Chimera integrates an object-oriented data model, a declarative query language based on deductive rules, and an active rule language for reactive processing. In this paper, we present the authors’ proposal for constraint management in Chimera, which relies on the declarative specification of passive constraints as deductive rules and on their transformation into different types of active rules.
منابع مشابه
Optimization of majority protocol for controlling transactions concurrency in distributed databases by multi-agent systems
In this paper, we propose a new concurrency control algorithm based on multi-agent systems which is an extension of majority protocol. Then, we suggest a clustering approach to get better results in reliability, decreasing message passing and algorithm’s runtime. Here, we consider n different transactions working on non-conflict data items. Considering execution efficiency of some different...
متن کاملPartial Information Based Integrity Constraint Checking
Integrity constraints are useful for specifying consistent states of a database, especially in distributed database systems where data may be under the control of multiple database managers. Constraints need to be checked when the underlying database is updated. Integrity constraint checking in a distributed environment may involve a distributed transaction and the expenses associated with it: ...
متن کاملImpact of priority assignment on optimistic concurrency control in distributed real-time databases
In the studies of real-time concurrency control protocols (RT-CCPs), it is always assumed that earliest deadline first (EDF) is employed as the CPU scheduling algorithm. However, using purely (ultimate) deadline for priority assignment may not be suitable for distributed real-time database systems (DRTDBS) in which there exist different kinds of transactions, such as global and local transactio...
متن کاملIntegrity Constraint Checking in Federated Databases
A federated database is comprised of multiple interconnected databases that cooperate in an autonomous fashion. Global integrity constraints are very useful in federated databases, but the lack of global queries, global transaction mechanisms, and global concurrency control renders traditional constraint management techniques inapplicable. This paper presents a threefold contribution to integri...
متن کاملPerformance of Distributed Optimistic Concurrency Control in Real-Time Databases
Concurrency control is one of the main issues in the studies of real-time database systems. In this paper different distributed concurrency control methods are studied and evaluated in real-time system environment. Because optimistic concurrency control is promising candidate for real-time database systems, distributed optimistic concurrency control methods are discussed more detailed way. We p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEEE Data Eng. Bull.
دوره 17 شماره
صفحات -
تاریخ انتشار 1994