Research Of Digital Library Grid Structure Model And Schedule Al Gorithm

Nowadays,every digital library at different locations forms information island making resource cannot be shared sufficiently. How to join these digital libraries up effectively, share various digital resources in the field of digital libraries has become the focus. The development and application of grid technology provide the effective method to resolve the problem. At present ,a lot of scholars have put forward a digital library grid design and achieved some fruits, but there are still many problems such as server bottlenecks, poor fault-tolerance and low autonomy and so on.The article studys digital libraries grid structure model and grid schedule that in model mainly.Firstly, for the problem such as server bottlenecks, poor fault-tolerance and low autonomy in DL-Grid system today. We proposed a digital library grid structure model based on P2P self-organization ,introduced model architecture in detail,described and analyzed the structure model by the method of Petri Net.Secondly, on the foundation of studying deeply on kinds of grid schedule algorithms, considering safety problem during the process of schedule, Trust-Sufferage grid scheduling algorithm was proposed based on trusting mechanism by improving the Sufferage algorithm. The algorithms adopted Bayes method to compute trust value between resource node and task node and achieved the aim of safe schedule.Finally, we build the resemble grid environment and carried on schedule simulation experiment. We Validated schedule algorithm in aspects of makespan and exact rate, and discussed the influence of gridlet number and weigh parameter.