Load Sharing Based on PSO Algorithm for Isolated Distributed Stream Servers

Isolated Distributed Stream Servers (IDSS) is the main form of video-on-demand (VOD) service architecture in industrial community nowadays. Contrast to the previous work on load sharing in distributed VOD system which all follows the idea of having high-speed inner network among service nodes, in this paper, we firstly focus on load sharing algorithm under IDSS architecture and introduce global stream distribution optimization, future user arrival rate estimation and more disk storage redundancy rate to make the effect of load sharing more satisfactory. Moreover the influence of video redundancy rate and some other parameters in our algorithm is detected through simulation. Preliminary experiment results suggest that our algorithm outperforms existing load sharing algorithms under IDSS architecture and sometimes even works better than existing ones with inner network.