Workstations have been in use for more than a decade now. Although a network of workstations represents a large amount of aggregate computing power, there is a need for software that can harness this power for single, distributed applications. Enterprise is an interactive graphical programming environment for designing, coding, debugging, testing, monitoring, profiling and executing programs in a distributed hardware environment. Enterprise code looks like familiar sequential code because the parallelism is expressed graphically and independently of the code. The system automatically inserts the code necessary to handle communication and synchronization, allowing the rapid construction of correct distributed programs. The system supports load balancing, limited process migration, and dynamic distribution of work in environments with changing resource utilization. Enterprise utilizes the combined power of a cluster of workstations by providing a high-level programming model and environm...

Workstation environments have been in use for more than a decade now. Although a network of workstations together represents a large amount of aggregate computing power, single users often cannot utilize these resources for their applications. Enterprise is a programming environment for designing, coding, debugging, testing, monitoring, profiling and executing programs in a distributed hardware environment. Enterprise code looks like familiar sequential code; the parallelism is expressed graphically. The system automatically inserts the code necessary to handle communication, synchronization and fault tolerance, allowing the rapid construction of correct distributed programs. Enterprise programs run on a network of computers, absorbing the idle cycles on machines. The system supports load balancing, limited process migration, and dynamic distribution of work in environments with changing resource utilization. Enterprise offers a costeffective method for increasing the productivity of p...

Enterprise is a graphical programming environment for designing, coding, debugging, testing, monitoring, profiling and executing programs in a distributed hardware environment. Enterprise code looks like familiar sequential code. The user attaches icons, called assets, to sequential code modules to specify the parallelism of the program. The system provides several kinds of assets, each representing a different high-level technique of parallelism. There is an analogy between assets in a program and those in an organization. The system automatically inserts the code to handle communication and synchronization into a module based on its attached asset kind. Also, the system runs the program and supports limited process migration and dynamic distribution of work, based on the demand and availability of resources. Enterprise is an on going project involving many researchers. This thesis presents the work on the design and implementation of the textual interface, the Enterprise assets, the ...

For almost a decade we have been working at developing and using template-based models for coarse-grained parallel computing. Our initial system, FrameWorks, was positively received but had a number of shortcomings. The Enterprise parallel programming environment evolved out of this work, and now, after several years of experience with the system, its shortcomings are becoming evident. This paper outlines our experiences in developing and using the two parallel programming systems. Many of our observations are relevant to other parallel programming systems, even though they may be based on different assumptions. Although template-base models have the potential for simplifying the complexities of parallel programming, they have yet to realize these expectations for high-performance applications. 1 Introduction Along with the growing interest in parallel and distributed computing, there has been a corresponding increase in the development of models, tools and systems for parallel progra...

For almost a decade wehavebeenworking at developing and using template-based models for parallel computing. Template-based models separate the specification of the parallel structuring aspects from the application code that is to be parallelized. A user provides the application code and specifies the parallel structure of the application using high-level icons, called templates. The parallel programming system then generates the code necessary for parallelizing the application. The goal here is to provide a mechanism for quick and reliable development of coarse-grain parallel applications that employ frequently occurring parallel structures. Our initial template-based system, FrameWorks, was positively received but had a number of shortcomings. The Enterprise parallel programming environmentevolved out of this work. Now, after several years of experience with the system, its shortcomings are becoming evident. Controlled experiments have been conducted to assess the usability o...