The Research On Task Scheduling Algorithm And Strategy Of Resource Management Based On QoS In Grid Enviroment

The Grid is an opened, dynamic network environment.User can submit the job to the Grid from everywhere. On the other hand, the Grid resource, user and the manage strategy can change dynamically.On these situation, the QoS based Grid resource management system is faced with the tremendous challenge.This paper focuses on the problems which are the mainly aspect of the QoS based Grid resource management and make a relatived research on the architecture of Grid QoS resource management.First of all, The QoS parameters with their properties are classified, and the hierarchical structure of Gird QoS is analyzed and designed. The QoS description and the mechanism of the QoS maping are introduced.Then, Combined with the QoS matching, any other constraint of the task and multi-dimension capability evaluation standards, the conventional computing oriented task scheduling algorithm is improved. The experiments show that the improved algorithm overweighs traditional algorithms a lot in makespan, throughout parameters.At last, The strategy of the resource advanced reservation is combined with the scheduling algorithm to present a QoS based resource reservation strategy which can adapt the changes of the Grid. Then, the GARA resource management model is analyzed and improved, and a new model of QoS-based Grid resource management is designed.The new model can adapt the need of the Grid QoS better.