Design and implementation of GORDION, an object base management system

Ege, Aral; Ellis, Clarence A.

doi:10.1109/icde.1987.7272377

Cited by 17 publications

(4 citation statements)

References 3 publications

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“…Tickle locks [28] allow the lock to be released to another requester after an idle period; soft locks [17] allow locks to be broken by explicit override commands. Numerous other schemes notify users when locks are obtained or conflicting requests submitted.…”

Section: Simple Lockingmentioning

confidence: 99%

Groupware: some issues and experiences

Ellis¹,

Gibbs²,

Rein³

1991

Commun. ACM

Self Cite

1,993

716

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Section: Simple Lockingmentioning

confidence: 99%

Groupware: some issues and experiences

Ellis¹,

Gibbs²,

Rein³

1991

Commun. ACM

Self Cite

1,993

716

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“…Garza and Kim (1988) adapt the concept of granular locking to composite objects in OODBMSs. Analogous to Ege and Ellis (1987), the ASN regards database objects as lockable units to allow maximum concurrency. Hierarchical object locking means to consider the composite hierarchy and to choose elements of this hierarchy as lockable units.…”

Section: Concurrency Controlmentioning

confidence: 99%

“…Mylopoulos et al (1996) present a shared knowledge base for advanced applications in diverse areas such as computer-aided design (CAD), software engineering and real-time process control that is based on a knowledge representation framework. An object base management system is described in Ege and Ellis (1987), which is called Gordion. Gordion is a server providing permanence and sharing of objects within an object-oriented environment and supporting notification and interactive conflict resolution rather than serializability.…”

Section: Related Workmentioning

confidence: 99%

Knowledge-based support of rapid product development

Roller

Eck

Dalakakis

2004

Journal of Engineering Design

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The benefits of Rapid Prototyping technologies can be applied efficiently only when they are embedded in an entire product development process. Rapid Product Development (RPD)-an iterative process involving manufacturing and evaluation of rapid prototypes-is mostly characterized by decentralized design teams cooperating on a high degree of process parallelism. In practice, RPD processes often lack mechanisms to combine design results of different designers, and, therefore, information management and the integration of interdisciplinary knowledge are some of the most central problems in the RPD process. An approach for supporting the entire RPD process consists of providing designers with a common knowledge base that represents all information relevant in RPD. Such a knowledge base helps to establish a common understanding and support the communication and cooperation of design teams. A requirement analysis of engineering databases shows that conventional database concepts do not support the required functionality of this application domain sufficiently. Here, advanced database features, such as an advanced transaction concept or active modelling primitives representing the semantics of product data, are needed. This paper presents a knowledge database called the Active Semantic Network. The Active Semantic Network has been developed to face the special tasks of designers working in RPD processes.

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“…Atomicity is another property from the traditional model that is not suitable in an environment where applications have long duration. Support for the propagation of changes within a group can be provided in the form of notifications [ 171 or activity logs [12,15]. The first technique allows users to be notified of conflicting accesses in which case they can try some compensating procedure such as reading the updated data.…”

Section: Cooperative Modelsmentioning

confidence: 99%

Transaction support for an ANSA-based platform

Toledo

Blair²

14th International Conference on Distributed Computing Systems

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This article considers the problems of ensuring reliability in distributed cooperative systems through the transaction methodology. From the analysis of several transaction models, it is argued that the diversity of requirements in the distributed environment demands a novel approach. The transaction model proposed in this article aims at providing the required flexibility. In this model, applications have more control over transaction management through the specification of policies for services such as concurrency control and recovery. The approach also features a number of mechanisms specifically tailored for distributed cooperative systems including notifications and reservations. The model feasibility is demonstrated by layering the transaction facilities on top of a distributed plagorm based on ANSA.

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Design and implementation of GORDION, an object base management system

Cited by 17 publications

References 3 publications

Groupware: some issues and experiences

Groupware: some issues and experiences

Knowledge-based support of rapid product development

Transaction support for an ANSA-based platform

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