BECP: the scheduling policy based on best-effort in clustered VOD servers

The increasing process power of personal terminates enable VOD server to have more flexible schedule scheme. This paper proposed a server-push scheduling strategy that based on best-effort transmission, called BECP (best-effort concurrent push) scheduling scheme. Different to traditional video servers schedule policy, all server nodes in the cluster send out the media data blocks as soon as they are retrieved from disks without long time buffering. We made an analysis of the system performance and made a simulation. The simulation results show that, with BECP scheduling policy, a clustered VOD server with 128 nodes and 4 disks per nodes will support over 3160 concurrent streams, and it occupies small buffering space.