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

1 SELECTED TOPICS IN DISTRIBUTED AND PARALLEL SYSTEMS Grid Technologies - Practical Lab

Lab 04 - Schedule 2  Discussion of Homework 02  Material required for next Assignment  CoG Kit Abstraction Layer  Overview on Homework 03

CoG Kit Abstraction Layer 3

CoG Kit Layers 4

CoG Kit Abstractions 5  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 6  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- common/index.html