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  • 1
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    Resource Selection Using Execution and Queue Wait Time Predictions (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: Computational grids provide users with many possible places to execute their applications. We wish to help users select where to run their applications by providing predictions of the execution times of applications on space shared parallel computers and predictions of when scheduling systems for such parallel computers will start applications. Our predictions are based on instance based learning techniques and simulations of scheduling algorithms. We find that our execution time prediction techniques have an average error of 37 percent of the execution times for trace data recorded from SGI Origins at NASA Ames Research Center and that this error is 67 percent lower than the error of user estimates. We also find that the error when predicting how long applications will wait in scheduling queues is 95 percent of mean queue wait times when using our execution time predictions and this is 57 percent lower than if we use user execution time estimates.
    Keywords: Cybernetics, Artificial Intelligence and Robotics
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Control and Observation in Distributed Environments (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This viewgraph presentation provides information on the ideas surrounding the control and observation of a distributed computing environment based on the design of the electrical power grid. The implementation of a reliable control system for the management of the computational grid is crucial. Different architectures have been suggested.
    Keywords: Computer Systems
    Type: Apr 27, 2001; Chicago, IL; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    An Evaluation of Alternative Designs for a Grid Information Service (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Globus information service wasn't working well. There were many updates of data from Globus daemons which saturated the single server and users couldn't retrieve information. We created a second server for NASA and Alliance. Things were great on that server, but a bit slow on the other server. We needed to know exactly how the information service was being used. What were the best servers and configurations? This viewgraph presentation gives an overview of the evaluation of alternative designs for a Grid Information Service. Details are given on the workload characterization, methodology used, and the performance evaluation.
    Keywords: Computer Systems
    Type: 9th IEEE Symposium on High Performance Distributed Computing; Jan 01, 2000; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    An Execution Service for Grid Computing (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: This paper describes the design and implementation of the IPG Execution Service that reliably executes complex jobs on a computational grid. Our Execution Service is part of the IPG service architecture whose goal is to support location-independent computing. In such an environment, once n user ports an npplicntion to one or more hardware/software platfrms, the user can describe this environment to the grid the grid can locate instances of this platfrm, configure the platfrm as required for the application, and then execute the application. Our Execution Service runs jobs that set up such environments for applications and executes them. These jobs consist of a set of tasks for executing applications and managing data. The tasks have user-defined starting conditions that allow users to specih complex dependencies including task to execute when tasks fail, afiequent occurrence in a large distributed system, or are cancelled. The execution task provided by our service also configures the application environment exactly as specified by the user and captures the exit code of the application, features that many grid execution services do not support due to dflculties interfacing to local scheduling systems.
    Keywords: Computer Systems
    Format: application/pdf
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  • 5
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    A Framework for Control and Observation in Distributed Environments (2001)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: As organizations begin to deploy large computational grids, it has become apparent that systems for observation and control of the resources, services, and applications that make up such grids are needed. Administrators must observe the operation of resources and services to ensure that they are operating correctly and they must control the resources and services to ensure that their operation meets the needs of users. Further, users need to observe the performance of their applications so that this performance can be improved and control how their applications execute in a dynamic grid environment. In this paper we describe our software framework for control and observation of resources, services, and applications that supports such uses and we provide examples of how our framework can be used.
    Keywords: Computer Systems
    Type: NAS-TR-01-006
    Format: application/pdf
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  • 6
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    IGP Services (2003)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The goal is location-independent computing. Implementing a set of services to satisfy this goal, build upon the GLOBUS toolkit services, and implementing with OGSA. Current status includes: Event service, Job manager, Resource selector and Broker, Next versions in development.Development includes: Monitoring and testing, Portability manager, Performance prediction, Dynamic accounting, and MDS evaluation.
    Keywords: Computer Systems
    Format: application/pdf
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