DISTRIBUTED AND PARALLEL SYSTEMS Grid Technologies - Practical Lab - - PowerPoint PPT Presentation

SELECTED TOPICS IN DISTRIBUTED AND PARALLEL SYSTEMS

Grid Technologies - Practical Lab

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Lab 04 - Schedule

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 Discussion of Homework 02  Material required for next Assignment

 CoG Kit Abstraction Layer

 Overview on Homework 03

CoG Kit Abstraction Layer

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CoG Kit Layers

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CoG Kit Abstractions

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 Supports elementary Grid activities  Job execution, file transfer, file operations, …  Allows to model complex control flows  Based on directed acyclic graphs (DAGs)  Handles dependencies automatically  Independent of the low-level Grid implementations  GT2, GT4, Condor, SSH, …  More details:  http://wiki.cogkit.org/wiki/Java_CoG_Kit_Abstraction_Guide

Hello World Example

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 Contributing elements (for job execution)  Job Specification – description of a job to be executed  Task – atomic element of a control flow  TaskGraph – a complex control flow  Service – interface to a remote Grid Service  TaskHandler – adapter processing abstract description  Example Code available on the lab homepage  See API  http://www.cogkit.org/release/4_1_5/api/abstraction-

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