ISIS and META projects

The ISIS project has developed a new methodology, virtual synchony, for writing robust distributed software. High performance multicast, large scale applications, and wide area networks are the focus of interest. Several interesting applications that exploit the strengths of ISIS, including an NFS-compatible replicated file system, are being developed. The META project is distributed control in a soft real-time environment incorporating feedback. This domain encompasses examples as diverse as monitoring inventory and consumption on a factory floor, and performing load-balancing on a distributed computing system. One of the first uses of META is for distributed application management: the tasks of configuring a distributed program, dynamically adapting to failures, and monitoring its performance. Recent progress and current plans are reported

Programming your way out of the past: ISIS and the META Project

The ISIS distributed programming system and the META Project are described. The ISIS programming toolkit is an aid to low-level programming that makes it easy to build fault-tolerant distributed applications that exploit replication and concurrent execution. The META Project is reexamining high-level mechanisms such as the filesystem, shell language, and administration tools in distributed systems

The Tradeoffs Between Timesharing and Dedicated Computers in a Medical Setting

journal articleBiomedical Informatic

A Checkout Language for Future Space Vehicles

To support an increased emphasis on automated checkout of future space vehicles, a procedureoriented computer language is required. This language needs to be more user-oriented and needs to have a more complete set of capabilities than existing languages. Such a language, named TOTAL, was developed under contract to NASAKSC. This paper presents an overall view of the language in terms of its major characteristics as derived from the basic design objectives

Assess program: Interactive data management systems for airborne research

Two data systems were developed for use in airborne research. Both have distributed intelligence and are programmed for interactive support among computers and with human operators. The C-141 system (ADAMS) performs flight planning and telescope control functions in addition to its primary role of data acquisition; the CV-990 system (ADDAS) performs data management functions in support of many research experiments operating concurrently. Each system is arranged for maximum reliability in the first priority function, precision data acquisition

A shared environment for microcomputer system development

A timeshared microcomouter monitor for Intel b 6 microprocessor systems development has been described. Running on the Sycor 440 Clustered Terminal Processina System* the monitor provides a virtual environment comoosed of a console device* eight floorv disk drives* and an b y m i c roorocessor for up to four concurrent users. Virtual floppy disk files on a five meaabvte movable-head disk provide the system's primary auxiliary storaoe medium. Three different levels of access protection are available for these virtual flopoy disk images. A command 1 a n a u a q e processor has been included to support nn-line modification of the virtual environment. System recovery in the event of a hardware or software failure is also supported by the monitor.http://archive.org/details/sharedenvironmen00browCaptain, United States Marine CorpsLieutenant, United States NavyApproved for public release; distribution is unlimited