In order to provide data consistency in the presence of failures and concurrency, database methods will continue to be important to the processing of shared information in a mobile computing environment. It is important, therefore, that we develop transaction processing systems that accommodate the limitations of mobile computing, such as frequent disconnection, limited battery life, low-bandwi...

We provide a strategy to restructure transaction processing systems. Such systems are core assets of most modern business operations, so their enhancement is crucial. Before large-scale renovation of transaction processing systems can take place, they need to be restructured. We argue that teleprocessing systems are unstructured by their nature. In this paper we approach the problems from a tec...

Coupling multiple workstations for high performance transaction processing has become increasingly attractive for reasons of capacity, cost, and availability. PHLOX is a prototypical transaction processing system running on the workstation cluster with shared disks. PHLOX supports a message oriented file system for database sharing, global cache coherency and concurrency control, affinity-based...

Attstraet-Gptimistic concurrency control schemes allow uncontrolled access to shared data objects during transaction processing under the explicit assumption that read and write coticts among transactions are rare events. Before a transaction commits, the DBMS has to validate that no conflict has occurred Conflict resolution mainly relies on transaction abort. Two different optimistic concurren...

This paper describes a distributable, three-tier client-server architecture for heterogeneous, multivendor environments based on the integration of Digital's ObjectBroker and ACMSxp transaction processing monitor products. ObjectBroker integration software provides the flexibility to decouple the tight association between desktop devices and specific legacy systems. The ACMSxp transaction proce...

The ARIES recovery algorithm has had a significant impact on current thinking on transaction processing, logging and recovery. In this paper, we present the C-ARIES algorithm, which extends the original algorithm with the capability to perform transaction aborts and crash recovery in a highly concurrent manner. Concurrency is achieved by performing transaction aborts and the Redo and Undo recov...

Transaction processing in a Mobile Database System (MDS) is more complex because of unlimited mobility of the Mobile Unit (MU). The handoff and frequent failure of mobile unit makes it tricky to store log records and access it for recovery. In this paper, we present a new log management scheme, which uses a mobile-agent-based framework to facilitate efficient transaction processing during hando...

We describe an intelligent tutoring system that may be used to assist university-level students to learn key aspects of database transaction processing. The tutorial aid is based on a well defined theory of learning, and is implemented using PROLOG and Java. Some results of the evaluation of the learning tool are presented to demonstrate its effectiveness as a tutorial aid in an e-learning envi...

The term Big Data has been used and abused extensively in the past few years, and means different things to different people. A commonly used notion says Big Data is about “volume” (of data), “velocity” (rate at which data is inserted/updated) and “variety” (of data types). In this tutorial, we use the term Big Data to refer to any data processing need that requires a high degree of parallelism...

The increasing demand for high throughputs in transaction processing systems leads to high degrees of transaction concurrency and hence high data contention. The conventional dynamic two-phase locking (2PL) concurrency control (CC) technique causes system thrashing at high data contention levels, restricting transaction throughput. Optimistic concurrency control (OCC) is an alternative strategy...