Primitives for distributed computing in a heterogeneous local areanetwork environment

Epsilon is a testbed for monitoring distributed applications involving heterogeneous computers, including microcomputers, interconnected by a local area network. Such a hardware configuration is usual but raises difficulties for the programmer. First, the interprocess communication mechanisms provided by the operating systems are rather cumbersome to use. Second, they are different from one system to another. Third, the programmer of distributed applications should not worry about system and/or network aspects that are not relevant for the application level. The authors present the solution chosen in Epsilon. A set of high-level communication primitives has been designed and implemented to provide the programmer with an interface independent of the operating system and of the underlying interprocess communications facilities. A program participating in a distributed application can be executed on any host without any change in the source code except for host names     

Communication facilities for distributed transaction-processingsystems

The study of communication designs in the context of the Raid system, a robust and adaptable distributed database system for transaction processing, is discussed. Related research work on local interprocess communication, remote interprocess communication, and communication protocols for both local area and wide area networks is briefly summarized. A series of experiments on the performance of the facilities available for building the Raid communication software is described. Raid's communication software, called Raidcomm, has evolved as a result of the knowledge gained both from other systems and from the authors' experiments. Several communication services and mechanisms that can be used to make Raid efficient are identified     

MS LAN Manager 2.0网络操作系统及其特点

本文介绍了Microsoft公司的一个局网操作系统 LAN Manager V 2.0,对它的体系结构、组成、特点等作了简单说明,并与当今流行的另一局网操作系统,即Novell公司的NetWare在某些方面做了比较.     

SCIDDLE: A tool for large scale distributed computing

We report on a portable communication environment, ‘SCIDDLE’, for distributing computations over heterogenous networks of UNIX computers. SCIDDLE is based on the client-server model. It was designed to support the distribution of large scale numerical computations and to keep its usage as simple as possible. All interprocess communication is done via remote procedure calls. The user defines the interface between communicating processes in a simple declarative language. Parallel programming is supported by asynchronous RPCs. A convenient array handing has been implemented. We demonstrate the usefulness of the system with an application from quantum chemistry on internet-connected workstations and supercomputers.     

Ein intergriertes Hardware-Software-System zur Steuerung der Ein/Ausgabe

The input/output components in contemporary operating systems are frequently “grown” parts which have individually and specifiquely been designed and amended in the course of new technical developments. However, a rigid analysis reveals the possibility for a unique control system which is mainly built upon the means for interprocess communication. The system is easily continuated into the technical elements. Also, inhomogeneities within the peripheral attachment scheme as well as unconventional service strategies are smoothly incorporated.     

An Introduction to the V-System

A distributed operating system runs on Sun and VAXstation-II workstations connected by an Ethernet. Its distributed kernel provides inexpensive processes and fast interprocess communication.     

A multicast interface for UNIX 4.3

The UNIX 4.3 operating system, like its predecessor UNIX 4.2, is designed to allow interprocess communications between pairs of processes using sockets — pairs of integers identifying specific hosts and ports — which are associated with a process. In this paper a software package which allows interprocess communications between many UNIX processes (as opposed to two) is presented.     

LINUX进程间通信的模型检测

模型检测是一种强大的自动分析验证技术.分析了LINUX进程间通信的部分源代码并进行手工形式化建模,使用有限状态自动机描述模型,继而转换成SPIN的输入语言PROMELA,对其进行模型检测,验证了系统的有界性和可终止性,并就进程间通信中容易发生的问题提出了改进方案.     

理解Linux环境下SYSTEM V进程间通信

为了满足在大型的应用系统中进程间通信的需求,讨论了Linux环境下的几种主要进程间通信手段,不仅对每种通信手段的内部实现原理和机制进行了具体分析,而且通过实例应用为功能实现的理解提供了有效的借鉴,为在Linux环境下的应用开发提供了坚实的理论基础。     

Utility servers in charlotte

Most distributed operating systems are built with a kernel replicated in each machine that supports only basic interprocess communication (IPC) and process control. All other system services, such as memory management, file system, and name service, are distributed in a set of utility servers, which are ordinary processes (except perhaps for some privileges) residing at various machines. Design and implementation of such utility servers in distributed environments are far different from those in a centralized system. This paper presents our experience in building utility servers in Charlotte, a message-based distributed operating system running on a loosely-coupled multicomputer. Utility services in Charlotte are provided by server squads. Each member in a squad covers services to its own community. The squad as a whole co-operatively provides services to the entire system. These servers are designed with the goals of simplicity, efficiency and robustness. They are intended to support a multiprogramming system for the development of distributed algorithms and other distributed applications. We address several major issues in developing a utility server, including the server structure, the management of message buffers, deadlock, and the robustness of server processes. Several utility servers in the Charlotte system are discussed as real examples.     

An Application of Name Based Addressing to Low Level Distributed Algorithms

An interprocess communication structure for a distributed language is described which provides message level communication, multicast, and a generalized naming facility. The design is oriented to the needs of low level algorithms which, for example, might be used in a distributed operating system to support resource allocation or enhance reliability. The proposal is illustrated by programming several distributed algorithms from the literature. An implementation is described that takes advantage of physical multicast technology, and reduces to more conventional schemes for common communication paradigms.     

A Local Network Based on the UNIX Operating System

The design and implementation of a local network operating ystem based on the UNIX¹operating system is described. UNIX has been extended to allow existing programs to access remote resources with no source program changes. Programs may access remote files, have a remote working directory, execute remote programs, and communicate with remote processes using the standard UNIX interprocess communication mechanism (pipe's). An efficient message-oriented interprocess communication mechanism and asynchronous I/O were added to the system to support the development of distributed applications and to make it easier to connect the local network to packet-switched networks.     

基于Win95的网络协议软件开发技术

网络协议软件的开发技术因为涉及到操作系统核心，所以大多没有公开的资料。以一个ＩＰ网关的实现为基础，阐述了网络协议软件在Ｗｉｎ９５中的开发方法。重点讨论了网络接口的实现，进程通信和内在管理等核心技术。     

TRIPOS—a portable operating system for mini-computers

There are several successful operating systems for mini-computers written in high level languages and the time is now ripe for the development of portable systems for such machines. The system described in this paper is primarily designed to provide a friendly interactive multiprocessing environment for a single user. From his point of view, substantial parts of the system are completely machine independent. These include, for instance, the filing system, the command language, text editors, overlaying facilities and interprocess communication primitives. The system is suitable for many different application areas ranging over process control, data acquisition, data communication, text handling, data base systems and teaching.     

A Parallel Processor Operating System Comparison

Three different operating system strategies for a parallel processor computer system are compared, and the most effective strategy for given job loads is determined. The three strategies compare uniprogramming versus multiprogramming and distributed operating systems versus dedicated processor operating systems. The level of evaluation includes I/O operations, resource allocation, and interprocess communication. The results apply to architectures where jobs may be scheduled to processors on the basis of processor availability, memory availability, and the availability of one other resource used by all jobs.     

RTLinux中分布式实时IPC的设计与实现

RTLinux是一个具有硬实时性能的单机实时操作系统，它提供了多种进程间通信机制，如信号量、消息队列和RT-fifo等。在RTLinux提供的进程间通信机制基础上，本文提出 了一种在RTLinux中设计并实现分布式实时IPC模块的具体方法，最后详细阐述了分布式实时IPC模块的工作流程和各功能模块的实现。     

一种面向嵌入式系统的进程间消息信方法的设计

描述了具有典型意义的多CPU嵌入式系统的体系结构,详细介绍了一种应用于此种嵌入式系统的分布式操作系统进程间消息通信的方法,又将此方法和常用的分布式操作系统的进程间消息通信方法进行了比较。     

嵌入式操作系统的硬实时微内核设计

目前的嵌入式实时操作系统存在着内核结构较为复杂、臃肿、稳定性不高、对硬实时应用支持不足等问题.针对这些问题,结合现有的操作系统内核理论及嵌入式实时系统的特殊需求,通过组件化的设计,将内核划分为核心态基本模块及用户态扩展模块,提供多种进程间通讯(IPC)方式,并引入独特的硬实时抢占式调度机制,设计出一种精炼、稳定的硬实时微内核.通过这种设计思路成功开发出了昊鹏(Hopen)操作系统新版内核,应用于最新的3G手机产品上,取得了非常好的效果.