Mos: A multicomputer distributed operating system

This paper describes the goals and the internal structure of MOS, a Multicomputer distributed Operating System. MOS is a general-purpose time-sharing operating system which makes a cluster of loosely connected independent homogeneous computers behave as a single-machine UNIX system. The main goals of the system include network transparency, decentralized control, site autonomy and dynamic process migration. The main objective in the design of the system was to reduce the complexity of the system, while maintaining good performance. The internal structure of the system can be characterized by modularity, a high degree of information hiding, hierarchical organization and remote procedure calls.     

The peregrine high-performance RPC system

The Peregrine RPC system provides performance very close to the optimum allowed by the hardware limits, while still supporting the complete RPC model. Implemented on an Ethernet network of Sun-3/60 workstations, a null RPC between two user-level threads executing on separate machines requires 573μs. This time compares well with the fastest network RPC times reported in the literature, ranging from about 1100 to 2600 μs, and is only 309 μs above the measured hardware latency for transmitting the call and result packets in our environment. For large multi-packet RPC calls, the Peregrine user-level data transfer rate reaches 8.9 Mbit/s, approaching the Ethernet's 10 Mbit/s network transmission rate. Between two user-level threads on the same machine, a null RPC requires 149 μs. This paper identifies some of the key performance optimizations used in Peregrine, and quantitatively assesses their benefits.     

A simple system for constructing distributed,mixed-language programs

The Mixed-Language Programming (MLP) System is a simple system that facilitates construction of sequential programs in which procedures can be written in different programming languages to exploit heterogeneity in language functionality. In addition, MLP provides a simple remote procedure call (RPC) facility that allows heterogeneity in machine functionality to be exploited. To minimize implementation cost, the system does not solve all of the problems related to mixed-language programming; rather, MLP is designed to handle common situations well. Among the unique aspects of MLP are its advanced facilities, which allow complex situations to be handled with user intervention; for example, these facilities allow arguments of a type not defined by a language to be used by procedures written in that language. This paper overviews the use of MLP and describes its implementation. In addition, two programs that have been written using the MLP system—a small database system and a collection of plot routines—are discussed. The system executes on a collection of Vaxes and Suns running Berkeley UNIX. Currently supported languages are C, Pascal and Icon.     

DEMOS/MP: The development of a distributed operating system

The DEMOS/MP operating system has moved from a supercomputer with a simple addressing structure to a network of microcomputers. This transformation was done without significant changes to the semantics of the original DEMOS, i.e. existing DEMOS programs should run on DEMOS/MP. The changes to DEMOS were simplified by the structure of its primitive objects and the functions over those objects. The structure of DEMOS links and processes were the major contributors to the simplicity. The changes made to produce DEMOS/MP involved the internal structure of link, modification to parts of the kernel, and limited changes to the various system processes.     

通用远程过程调用的设计与实现

在分布式计算系统中，远程过程调用ＲＰＣ是种流行的进程间通信机制。ＲＰＣ简单灵活，且功能较强。上前大多数ＲＰＣ机制是同步的，严重地影响了分布式应用的并行性。我们设计和实现了一个通用的ＲＰＣ。本文讨论了设计的要点和方法，并对通用ＲＰＣ的实现作了介绍。     

The Lynx distributed programming language: Motivation, design and experience

A programming language can provide much better support for interprocess communication than a library package can. Most message-passing languages limit this support to communication between the pieces of a single program, but this need not be the case. Lynx facilitates convenient, typesafe message passing not only within applications, but also between applications and among distributed collections of servers. Specifically, it addresses issues of compiler statelessness, late binding, and protection that allow run-time interaction between processes that were developed independently and that do not trust each other. Implementation experience with Lynx has yielded important insights into the relationship between distributed operating systems and language run-time support packages and into the inherent costs of high-level message-passing semantics.     

神经模糊控制在船舶自动舵中的应用

针对常规模糊自动舵由于受船舶控制过程的非线性、时变性以及风浪干扰等因素影响,模糊控制规则和隶属函数需要校正,利用神经网络的自学习能力,用神经网络去实现模糊控制,设计自动舵神经模糊控制器,采用BP算法和最小二乘算法的混合学习算法实现对模糊规则和隶属函数的参数训练,提高控制器的自适应能力。仿真实验表明所设计的控制器有效可行,适应船舶在风浪干扰环境下的控制性能要求。     

PEACE: The distributed SUPRENUM operating system

This paper describes the fundamental concepts and structure of the distributed operating system, PEACE, for SUPRENUM. A large scale of distribution is achieved because of consequently encapsulating typical operating system services by processes. By this way an optimal and application-oriented mapping of the entire operating system onto the distributed SUPRENUM architecture is made feasible.     

有关远程过程调用的几个重要问题的讨论

远程过程调用作为构造分布式系统的一个重要工具已经得到了广泛的应用,本文详细讨论了有关ＲＰＣ的七个重要问题：网络传输协议、类型一致性、错误处理、孤儿问题、效率问题、性能问题、互操作性。     

A performance study of deadlock prevention algorithms in a distributed file system

This paper describes an implementation and performance evaluation of different deadlock prevention algorithms. A deadlock prevention algorithm ensures that deadlock will never happen. The algorithms for deadlock prevention are proposed and implemented in a locally distributed system. A number of experiments were executed in a distributed system for various lengths of file operation and different numbers of files. The performance of the system and of each algorithm is evaluated and discussed. Some general results are derived for a single-host and a distributed system.     

Remote rendezvous

BNR Pascal is a systems programming language intended for the implementation of the systems software of distributed computing systems. It supports the Ada Rendezvous model of tasking and communication, uniformly extended to support communications between tasks distributed over the computing nodes of a system. BNR Pascal was designed and implemented in 1980, and has since been used to implement the operating systems and real-time applications software for Northern Telecom's Meridian family of products. In total, more than 2 million lines of BNR Pascal exist. This paper describes the BNR Pascal remote rendezvous: the extension of rendezvous to interprocessor communication. It discusses the implementation of remote rendezvous, describing the advantages and disadvantages of several options. Finally, it details BNR's experience in using remote rendezvous in building substantial, practical distributed systems used in products.     

Dawning-1000 PROOS Distributed Operating System

PROOS is a distributed operating system running on the computing nodes of massively parallel processing computer Dawning-1000.It is an efficient and easily extendible micro kernel operating system.It supports the Intel NX message passing interface for communication.     

Dragonmail: An exercise in distributed computing

A conversation-based message system groups related messages into conversations and orders messages within conversations according to the context in which they were submitted. This paper describes the implementation of a comprehensive conversation-based message system, called Dragonmail, that extends an earlier prototype in two ways. First, it integrates conversations with conventional memo-based mail in a way that preserves the semantics of the conversation abstraction. Secondly, it provides for the distribution of software components across multiple hosts to support remote interfaces.     

Modules,objects and distributed programming: Issues in RPC and remote object invocation

Distributed programming can be greatly simplified by language support for distributed communication, such as that provided by remote procedure call (RPC) or remote object invocation. This paper examines design and implementation issues in these systems, and focuses on the influence of the communication system on a distributed program. To make the discussion concrete, we introduce a single application as implemented in two environments: Modula-2+, an extension of Modula-2 with RPC, and Emerald, an object-based language that supports remote object invocation. We show that small differences in the implementation of the communication system can have a significant impact on how distributed applications are structured.     

Layered distributed operating system

The improved efficiency of microelectronics and the development of digital transmission systems have allowed experimentation with distributed computing architectures. The requirements of a distributed operating system are outlined, and the principles and architecture used in the system are explained. A method is described of managing the system directories, and an analysis is given of the results obtained.     

Unix环境下基于RMI的分布式计算研究与实践

在分析远程过程调用（RPC）原理的基础上，引入Java远程方法调用（RMI）的概念，并详细讨论了Java RMI的体系结构和运作机制。还给出了一个Unix环境下的分布计算示例。     

An implementation of distributed shared memory

Shared memory is a simple yet powerful paradigm for structuring systems. Recently, there has been an interest in extending this paradigm to non-shared memory architectures as well. For example, the virtual address spaces for all objects in a distributed object-based system could be viewed as constituting a global distributed shared memory. We propose a set of primitives for managing distributed shared memory. We present an implementation of these primitives in the context of an object-based operating system as well as on top of Unix.     

基于群机系统的Ada编译程序

为了使Ａｄａ程序运行在松散耦合分布式系统并且降低程度员开发分布Ａｄａ的程序的工,设计并实现了基于该环境下的Ａｄａ编译程序。