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Distributed network management using SNMP, Java, WWW and CORBA
Abstract
Java, WWW, and CORBA are complementary technologies that, once joined, may offer a powerful mechanism for the development of distributed management applications without necessarily overlapping some already existing standards such as SNMP and CMIP. Within this context, this paper makes use of these technologies in order to implement a distributed system for the management of a cluster of high performance stations. The information transfer required by this system is basically under the responsibility of the SNMP and the IIOP/CORBA protocols, while the user interaction with the system is done through a Web browser.
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... Logical entity migration [Baratto00,Fuggetta98,Bivens99]: If the retransmissions are due to long queuing times because of an overloaded server, two solutions are possible. The first is to migrate the logical entity (e.g. ...
... This satisfies the QoS requirement contracted to the users and makes them happy; "a happy customer is a return customer!" The prelude to effective load balancing, however, is successful network monitoring, which is an important network management issue still in the immature stage[Baratto00]. The fundamental of network monitoring is to sample chosen metrics in a real-time and non-intrusive manner. ...
Resumo -Nuvens verdes fornecem uma infra-estrutura que combina flexibilidade, garantia de qualidade de serviços e otimização do uso da energia. Para atingir estes objetivos, a solução de gerenciamento deve fazer ajustes internos, resolvendo problemas relacionados com a necessidade de atender a demanda de pico. Neste contexto, propomos uma solução integrada para gerência de recursos com base em modelos organizacionais de componentes autônomos. Estes componentes controlam os processos e ambientes, tais como prestadores de serviços, servidores, processamento, distribuição, serviços de carga, redução de temperatura, acordos de nível de serviço e uso de energia máxima. Este trabalho apresenta as melhorias feitas no modelo de gerência do sistema desenvolvido anteriormente, analisando o comportamento do sistema, descrevendo os novos princípios de operação e validando as novas idéias apresentadas.
The structure and the software model of networked manufacturing quality monitoring system are introduced in this paper. A set of three layer distributed manufacturing process monitoring system is comprised with remote quality manage center, manufacturing process supervision center and the units of measure and control layer. The design using object-oriented technique based on java can easily transport to different operation systems with high performance of the expansibility. The technology of SPC is applied to maintain the production line stability. The system is suitable for the production online analysis and judgment in the network environment. It can significantly increase the product quality and economic efficiency of enterprises.
This system helps in collecting statistical data and thereafter analyzes the enormous volume of data and aids in making quality related decisions. In contrary to conventional SPC applications where the analyzed results have to be interpreted by quality control specialists, MES based unmanned manufacturing environments require automation of the interpretation process. The developed monitoring system helps in selecting and designing control charts based on various cost, rule or heuristics models. The system also provides interpretation expertise by configuring and applying various rule sets. On violation of these rules, signals are generated by the system and the expert system advices for appropriate remedial actions. Thus the system can significantly increase the product quality and economic efficiency of enterprises.
This paper introduces the constitute, structure and the software model of a workshop integrated quality control system, using java network technique to realize a manufacturing process integrated monitoring system which is based on Manufacturing Execution System. In contrary to conventional SPC applications, MES based unmanned manufacturing environments require automation of the quality control process. The design using object-oriented technique based on java can easily transport to different operation systems with high performance of the expansibility. The system is suitable for the production process quality analysis and judgment in the MES environment. It can significantly increase the product quality and economic efficiency of enterprises.
Rapid growth of computer network sizes and uses necessitate analysis of network application middleware in terms of its scalability as well as performance. In this paper we analyze a distributed network management middleware based on agents that can be dispatched to locations where they can execute close to the managed nodes. The described middleware operates between the network protocol layer and the application layer and uses standard TCP protocol and SNMP probes to interface the network. By aggregating requests from many users into a single agent, our system allows multiple managers to probe problem areas with minimal management traffic overhead. We discuss and quantify the benefits of the described middleware by implementing real-time network managers using our system.
The main result of this paper is a comparison of scalability and efficiency of our agent-based management middleware and traditional SNMP-based data collection. To this end, we measured traffic in both real and simulated networks. In the latter case, we designed, used and described here a method of separating simulated application flow into separate subflows to simplify design of simulations. Copyright
Manufacturing Grid (MG) emerges as a new manufacturing model to provide a general platform for networked-manufacturing. The reliability is a significant and complex issue in MG system as resources in it are geographically distributed, heterogeneous and information dynamic in nature, owned by different enterprises or organizations with their own policies. In order to make MG work efficiently, the reliability for MG had been analyzed; a hierarchical evaluation model was proposed. In the end, the use of the model was also presented in system recovery policies. Full Text at Springer, may require registration or fee
This paper introduces the constitute, structure and the software model of a set of networked manufacturing quality monitoring system, using JAVA network technique to realize a set of three layer distributed manufacturing process monitoring system which is comprised with remote quality manage center, manufacturing process supervision center and the units of measure and control layer. The design using object-oriented technique based on JAVA can easily transport to different operation systems with high performance of the expansibility. The system is suitable for the production online analysis and judgment in the network environment. It can significantly increase the product quality and economic efficiency of enterprises.
The need to manage a multi-platform enterprise and the advancement of web technologies have made it possible to build powerful cross-platform management applications. As more network and system management tools become web-enabled, the web browser becomes a convenient point of integration.
This paper describes the architecture and implementation of a web-based management console to an existing PC management application. Justification for using an embedded web server instead of the normal general purpose web server and CGI’s is given. The limitations and solutions are discussed, as well as advantages over traditional GUI’s.
Several makers of network equipment are now using Web technology to deliver management data for remote sites. More suppliers are expected to roll-out Web-based management tool in the coming months. Web-based management tools can be deployed directly on the World Wide Web, or they can be installed behind private network firewalls. The private network scenario protects resources from outside intruders. Today's Web-based management offerings can serve as useful adjuncts to mainstream management platforms, particularly SNMP-based systems.
This white paper discusses the potential applications of World Wide Web technologies to satisfy network service management requirements. Web-based tools can be applied in many areas of network management from simple element to highly sophisticated service management applications. The background issues leading to this approach, examples of solutions and the overall benefits of Web browsers and Sun’s Java* are discussed.
The Java language environment, World Wide Web, and Common Object
Request Broker Architecture are complementary software technologies,
which when used together provide a powerful set of tools for developing
and deploying multi-user distributed applications. We describe an
approach to building reasonably sophisticated and easy-to-use client
software as WWW-downloadable Java applets, which use CORBA to interact
effectively with remote server software and thus coordinate and control
access to a set of shared resources. We used this approach to
reimplement a portion of an existing multi-user distributed application
that had been built using the WWW Common Gateway Interface (CGI), then
evaluated the differences between the two approaches. We found our
method of combining Java applets and CORBA not only practical but in
many ways superior to the widely used CGI approach, as well as to a
conventional CORBA approach that does not exploit the WWW
Systems to manage distributed heterogeneous networks and services
must often use off-the-shelf components and leverage legacy
applications. Much of the telecommunications industry uses a network
architecture based on CMIP (Common Management Information Protocol) to
manage networks and services, while much of the Internet uses the SNMP
(Simple Network Management Protocol). To provide distributed network
management, the telecommunications industry must accommodate both, Nokia
developed the Distributed Computing Platform prototype to support the
creation, management, and invocation of distributed telecommunications
services. Using CORBA as a base, DCP handles network management by
adding managed-object models and protocols. It provides mechanisms that
allow communication between CMIP-based objects and a gateway for
SNMP-based systems. The prototype also allows users to access network
information via Web browsers, CGI gateways, and Java or HTTP daemons.
The Nokia engineers also discuss the lessons they learned about Java and
CORBA integration
As networks grow in size, speed and flexibility, the role of network management becomes increasingly important. Recent developments in Internet technologies might provide the capabilities that are well suited to the solutions of some very challenging, outstanding problems in network management. The increasing popularity of the World Wide Web, with its established user interface and the ability to run on almost any platform, offers a new way to provide wide access to complex software applications. The goal of this paper is to describe some key capabilities of Internet technologies and critically assess whether there is a match between these technologies and the needs in managing networks. Keywords Network Management, World Wide Web, Java. 1 INTRODUCTION Networks today are managed typically through the use of powerful and general purpose monolithic management platforms. These to some degree of success provide integration of management tools, but pose a number of disadvantages: 1. Man...
Distributed systems management on the Web, Fifth IFIP / IEEE International Sympo-sium on Integrated Network Management
- B Reed
B. Reed, Distributed systems management on the Web, Fifth IFIP / IEEE International Sympo-sium on Integrated Network Management, San Diego, California, pp. 85–95, 1997.