A Survey of Distributed Enterprise Network and Systems Management Paradigms

Since the mid 1990s, network and systemsmanagement has steadily evolved from centralizedparadigms, where the management application runs on asingle management station, to distributed paradigms,where it is distributed over many nodes. In thissurvey, our goal is to classify all these paradigms,especially the new ones, in order to help network andsystems administrators design a management application, and choose between mobile code, distributedobjects, intelligent agents, etc. Step by step, we buildan enhanced taxonomy based on four criteria: thedelegation granularity, the semantic richness of the information model, the degree of specificationof a task, and the degree of automation ofmanagement.     

Performance and Efficiency in Distributed Enterprise Management

This paper is motivated by the increasing needfor scaleable, distributed management architectures forintegrated network, system and application managementwithin the enterprise network environment. Such integration, extension and wide area deploymentof management functionality impose heavy performancerequirements and produce increased management traffic.Aiming to minimize this traffic and the overall response time, we propose a distributedhierarchical caching scheme that attempts to takeadvantage of the diverse consistency requirements ofmanagement applications. We define coherency conditionsand update policies, identify the appropriateinteraction semantics, and discuss an SNMP-basedimplementation. In order to evaluate the proposed modeland to quantify the expected performance gains weconstruct a simple queuing model that provides analyticalresults on the improvement of response time and thereduction of management traffic. Finally, the analysisof experimental results provides some insight on performance improvement for specific classes ofmanaged objects.     

An ATM-Based Connection Management Architecture for Telecommunications Services

New open service architectures are now emerging.An important part of these architectures is theconnection management function. It enables theestablishment, control and release of semipermanentconnections requested by telecommunications services suchas virtual private networks. This paper presents thespecification, design and implementation of thisconnection management function in our OAMS Open Service Architecture. The proposed architecture isdeployed over a distributed processingenvironment.     

An Architecture for Building Scalable, Web-Based Management Services

We present the architecture of Marvel, adistributed computing environment for building scalablemanagement services using intelligent agents and theworld-wide web. Marvel is based on an information model that generates computed views of managementinformation and a distributed computing model that makesthese views available to a variety of clientapplications. Computed views consist of monitoring,control and event views of information collected fromnetwork elements and subsequently aggregated using aseries of spatial and temporal filters. Marvel does notreplace existing element management agents but rather builds on top of them a hierarchy ofservers that generate computed views and present them toclient applications in a number of formats, includingJava-enriched web pages. It uses a distributed persistent store to reduce the cost associatedwith centralized network management systems and mobileagent technology to: (a) support thin clients byuploading the necessary code to access Marvel services; and (b) extend its functionality dynamically bydownloading code that incorporates new objects andservices. A prototype implementation in Java ispresented together with results from its firstapplication on a residential broadband access system usingcable modems.     

TINA and the Software Infrastructure of the Telecom Network of the Future

The overall goal of the TelecommunicationsInformation Networking Architecture (TINA) is to defineand specify a software architecture for thetelecommunications infrastructure which encompassesnetworking, network services, and operations, to handle theincreasingly distributed nature of software in networks.The purpose of this paper is to describe how TINA may bepositioned in the software infrastructure of future telecommunications networks, with thefocus on the infrastructures of Public TelecommunicationOperators (PTOs). An architecture for a new PTO networkinfrastructure is proposed and the needs that this architecture satisfies are discussed.The concept of the programmable network isintroduced to satisfy the PTO need to quickly trial anddeploy new services. Five aspects of this targetarchitecture are discussed, namely: a client/serverarchitecture, a service creation architecture, anapplication architecture, a PTO federation architecture,and a new management architecture. The potential role of TINA in each aspect is described, and thepotential benefits of TINA to PTOs aresummarized.     

A Framework for Designing Distributed Management Applications

This paper presents a methodology for thespecification and design of multi-domain managementsystems that control, monitor and administer users andservices in a distributed telecommunication environment. It presents a framework, which serves as ablueprint for the design and implementation ofdistributed management applications. It defines a set ofconcepts and methods for guiding the analysis, design, and implementation phases of managementapplications, which are distributed over heterogeneoussystems. The framework is based on concepts ofTelecommunications Management Networks and OpenDistributed Processing, and is partially developed withinthe Pan-European Reference Configuration for IBC(Integrated Broadband Communication) Services Management(PRISM) project.     

An Open Secure Mobile Agent Framework for Systems Management

The Mobile Agent (MA) technology is gainingimportance in the distributed management of networks andservices for heterogeneous environments. MA-basedmanagement systems could represent an interestingalternative to traditional tools built upon theclient/server model, either SNMP- or CMIP-based. Twomain requirements currently limit the acceptance of MAsolutions for management: the need of interoperabilityand the request for security. Without security,management systems cannot suit global untrustedenvironments, such as the Internet; withoutinteroperability, they cannot interact with existingtools and legacy systems. The paper describes an MA-basedmanagement system with security and interoperability asthe two main design objectives. It is an open managementframework that grants interoperability by providing compliance with CORBA, the most diffusedstandard in the area of object-oriented components. Inaddition, it is based on a thorough security model andprovides a wide range of tools and mechanisms to build and enforce flexible securitypolicies.     

Design and Implementation of TMN SMK System Using CORBA ORB

In Telecommunications Management Network (TMN),the interworking of manager and agent requires thesharing of management information defined as SharedManagement Knowledge (SMK) in ITU-T Recommendation M.3010. SMK includes information on theprotocol knowledge, management functions, managed objectclasses and their instances, and authorizationcapabilities. We have developed a CORBA-based TMN SMKsystem in order to provide a dynamic and efficientdistributed processing environment for the exchange ofmanagement information between managers and agents. Inthis paper, we discuss the design issues and present the design of a CORBA-based SMK systemincluding the access protocol for obtaining the SMKinformation from MIB and for SMK context negotiations.Also, our effort on the prototype implementation of anSMK system using ORBeline and OSIMIS is presented.The preliminary performance results of our prototypeimplementation show that ORB-based SMK informationaccess outperforms CMIS-based SMK information access, and that our approach is an efficient way ofexchanging SMK information.     

Realizing TMN-like Management Services in TINA

Telecommunications Information NetworkingArchitecture (TINA) provides an architecture based ondistributed computing technologies to enabletelecommunications networks to support the flexibleintroduction and operation of new advanced services and tomanage both the services and the network in anintegrated fashion. While the service operation andmanagement aspects are well advanced, network management aspects are less well defined. ResourceConfiguration Management (RCM) is one of the mostimportant management areas as it covers, among others,the management of static topology and dynamicconnectivity resources; these are both fundamental to theoperation of TINA services. In this paper we presentfirst an analysis of RCM, which results in introducinga new domain that deals with the configuration of management resources, in addition to network,service and computing resources. We then present ageneric model for configuration management computationalentities; this separates specific task-oriented aspects from generic resource representationsaccessed in a flexible fashion. The genericcomputational interface and relevant methodology forrepresenting and accessing resources are influenced fromOSI/TMN design principles, but make use of the TINAODP-based Distributed Processing Environment (DPE).Based on this generic model, we present an RCM systemarchitecture that deals with network and management resources. Parts of the latter have beenverified through a prototype implementation in thecontext of a real field trial.     

A Model ATM Network and APIs for Service Management on an ATM Network

The architectural reference point for our workis a reference model which associates functionality withoperational planes along three orthogonalabstractedmodels. Within the context of this reference model a service management model is proposed. Themodel makes use of APIs for communicating managementinformation between a management application and serviceentities distributed in an ATM network. The APIs are based upon native ATM APIs that are similarto those that have recently been adopted by the ATMForum. The viability of the model is demonstrated bybuilding ATM multimedia services with service management capabilities. The model and the APIs have beenapplied to services executing in a national ATM network.Although the work is motivated by an ATM network, theservice management model is general, and may be applied to other networks as well. Some openissues in service management are brought out.     

Management system for distributed and hierarchical robot groups

This paper introduces a management system for robot groups with distributed and hierarchical architecture. In order to manage cooperation tasks of a great many robots, we put management systems on each work sub-area. A management system on a certain sub-area divides a task given by the upper sub-area into sub-tasks and gives the lower sub-areas those sub-tasks. With this architecture, we obtain distributed and hierarchical management system for the whole working area. We produced a simulation system and showed an example of task division and execution. We also produced a demonstration system.     

Service-Oriented Policy Management for Web-Application Frameworks

Policy Based Management technologies represent a potentially important tool in the management of user services provided by web application frameworks. Current policy management systems are, however, a poor fit for the domain due to their lack of support for decentralised management in open environments. The Community Based Policy Management System is a policy framework designed to facilitate management of services in domains where relationships are highly dynamic and flexible, where policy specification is distributed and may use multiple languages, and where management decision-making is shared between communities of users and service providers. This article describes the CBPMS schema and architecture and uses an example to show how it provides flexible, dynamic and extensible policy based management capabilities to the providers of user-services on the web.     

柔性微服务监控框架

微服务细化了服务的粒度,针对微服务的监控是微服务管理需要面对的核心问题,以可扩展全链路应用服务监控为目标,在已有服务管理层之上设计实现了一种柔性微服务监控框架,用于监控微服务状态和不断变化的服务负载,与已有的分布式监控架构相比,这种监控框架灵活度更高,对服务变化的感知能力更强,使用Raft算法增强了数据一致性,避免了单点故障的情况,经试验分析,代价更小,在实际项目中验证了框架及方法的有效性.     

Integrated TMN Service Management

The deregulation of the global telecommunicationindustry has seen a change in the business andoperational environment in which services are deployedand managed. The requirements have intensified toprovide a management framework for telecommunicationnetworks and services across multiple technology domainsand using multiple management technologies. This paperdescribes an integrated TMN service management architecture that provides an environment fordifferent service management functions and differentmanagement domains to be integrated. To furthersubstantiate this architecture, a system was built todemonstrate the integration concepts. The research anddevelopment work reported in this paper focuses on thefollowing two aspects of integration: first theintegration between TMN network and service managementfunctions; and next the integration between differentservice management functions. A proof of concept systemwas developed to demonstrate such integration. Itconsists of the following components: Generic service ordering and provisioning; connectionmanagement based on a generic network model concept; andservice management based upon service level agreementmanagement and customer service management concepts. This paper reports this work and theexperiences gained from this research.     

The Role Multimedia of Multicasting in Managing Interactive Distance Learning Systems

This paper discusses the important role ofmulticasting in designing, implementing, and managinginteractive multimedia distance learning systems. Thisis achieved in the context of IRI, an Interactive Remote Instruction system for distance learningbuilt at Old Dominion University. IRI is anInternet-based system which integrates continuousmultimedia, shared applications and a variety ofmulti-user collaborative utilities. In this paper, weconcentrate on the process architecture and dynamicmulticast group handling as they pertain to managingmultimedia resources, and show how they supportrobustness and short response time to user actions. IRIuses raw IP multicasting for audio and video streams andreliable multicasting for resource management and datasharing. The system is scalable (uses multicast for inter-process communication) andexpandable(partitioned into a setofautonomousbutcooperating components).     

Temporal Network Management Information Model and Services

The paper addresses the issue of time as anattribute of the network management information. Thetemporal dimension is incorporated in the managementinformation model proposed by the Internet Engineering Task Force (IETF), as it is described by theStructure of Management Information (SMI). The core ofthe proposed network management information model is theTemporal Management Information Base (TMIB), a conceptual representation of the diachronicbehavior of network resources. The temporal networkmodel also includes the definition of a specificarchitecture and a number of temporal services. Theexistence of such services facilitates the development oftime-reference applications in different functionalareas.     

一个基于CORBA和移动智能体的分布式网箱集成框架

文中分析了当前主流网管系统在体系结构上的缺陷,阐述了分布对象技术（CORBA）与移动智能体技术各自在网管领域的应用方法与优势。结合这些优势,给出了一个基于CORBA和移动智能体的分布式网管集成框架,并进一步通过实验模拟证实了其可行性。     

云计算技术及其安全性研究

云计算被视为IT业的下一代技术架构,其概念于2007年提出,是随着虚拟化技术、分布式存储技术、网格技术和自动化管理技术的发展而产生的,能够提供一种更加灵活配置应用的途径。但是,云计算将应用软件和数据库转移到庞大的数据中心,而数据中心对数据和服务的管理并不值得完全信赖。随之产生的安全问题是提高云服务质量的难点。同时,合理采用云计算技术也能够加强产品的安全性。首先阐述了云计算环境的特性及安全需求,其次,在介绍云计算安全研究现状的基础上,对安全性评估进行了分析,最后对云计算的未来发展趋势作了展望。     

中间件在电信多层分布系统的应用和研究

随着即将到来的3G电信网络管理系统对规模和服务种类要求的不断提高,对之进行分布式的网络管理成为现在电信网管的一个重要发展方向。中间件技术作为一种流行的并且功能强大的基于分布式管理的软件技术被广泛地应用到许多领域中。本文在叙述中间件的基本概念和分布式多层体系结构的优点的基础上,提出了中间件应用于3G网管的一种体系结构并加以实现。