National Securities Depository Ltd. a company promoted by IDBI, UTI and NSE was set up under the provisions of Depositories Act passed by the Parliament in 1996 to set up India's first securities depository and pioneer the concept of Dematerialization in India. Subsequent to its success in pioneering this reform, NSDL also received a mandate to set up Tax Information Network (TIN) from Income T...

Transaction execution in mobile environments needs to be flexible to support typical mobile computing characteristics, like movement, disconnections and limited resources, and also to support the variety of transactional properties that might be required by different applications. This paper proposes a solution for flexible transaction processing in mobile applications, and describes a middlewa...

Compensation is the process b y which a committed transaction in a database is undone b y running the semantic inverse o f that transaction on the database. Compensation has been proposed as a technique for undoing committed work in various situations where strict atomicity cannot be maintained [GS87, MR91]. In this paper, we discuss compensation i n longrunning multidatabase transactions. W e ...

One of the problems associated with running ad-hoc queries in an OLTP system is lock contention. Compensation-based query processing has been proposed as a solution to this problem. In this paper, undo/no-redo compensation is used to bring inconsistent copies of the base relations into a transaction-consistent state. Queries process the database internal log to obtain information on updates mad...

ÐIn this paper, we propose and experimentally evaluate the use of the client-server database paradigm for real-time processing. To date, the study of transaction processing with time constraints has mostly been restricted to centralized or asingle-nodeo systems. Recently, client-server databases have exploited locality of data accesses in real-world applications to successfully provide reduced ...

We characterize the number of remote accesses and the number of distinct remote sites accessed by global transactions in a distributed database environment. Both measures are important in determining the overhead of distributed transaction processing and are affected by the distribution of transaction size (number of distinct objects accessed by a transaction) and the distribution of remote acc...

Modern network centric information systems implement highly distributed architectures that usually include multiple application servers. Application design is mainly based on the fundamental object-oriented principles and the adopted architecture matches the logical decomposition of applications (into several tiers like presentation, logic and data) to their software and hardware structuring. T...