Research On Key Technologies Of Data Replication In Data Grid

The goal of data grid is that enables the widespread distribution association to shared data resources, so as to complete the job of large-scale magnanimous data set complex analysis and processing. The data replication technology is one which of improvement grid system performance key technologies in the data grid system widely uses. This paper has conducted the deep research to the domestic and foreign data grid data replication technical aspect, based on this and founded,for duplicate creation and choice problem,new solution strategies are proposed. Simultaneously,corresponding algorithm of the new solution strategies are proposed.Firstly, this paper has studied the current data grid's user actuation duplicate foundation strategy and economic foundation strategy.Also, their suitable environment is analyzed respectively. According as the bandwidth of data grid at present,a cluster topology and duplicate creation strategy(HRS) base on Bandwidth Hierarchy are proposed. The experiment result showes that in the situation of low network available bandwidth, the HRS strategy have the obvious superiority compares with other strategies.Secondly, for the similarity between data grid resources and real market resources assignment,this paper introduces the value mechanism as well as the game theory related knowledge to the duplicate selection strategy. A duplicate selection model base on game theory is found.Finally, a duplicate selection strategy base on Nash Equilibrium(DSSNE) is proposed. The test result showed that DSSNE strategy has the obvious superiority compares with traditional strategy in the situation of more jobs or duplicate request.