Abstract: The workload balancing is always the key of study in the Based on Scalable Object Mass Storage System (BSO-MSS). How to choice Storage Objects(SOs) and the number of them are. It presented a strategy of workload balancing in this paper. Not only do we thought over network effect on I3S0-MSS, but also we noticed SOs themselves. Aiming at different storing ability of SOs, the system adapts to choice the number of SOs by itself and adopts different size of stripping for data storing. When the number of SOs don't add up to the best value,we are adding the more number,the system has the least response time. So it enhances the whole system performance.

Key words: Based on scalable object mass storage system, Workload balancing,Flexiblc layout