Design and implementation of front end subsystem in cluster server system

Based on link aggregation, a solution of the front end interface subsystem which is suited for cluster server system was provided and implemented; so as to expand the number of the front end nodes with changing of application scope and enhance the availability of the cluster system. Link aggregation can aggregate multiple physical links into a logical link with a single virtual MAC (media access control) address; and the function that multiple interface nodes representing as a single IP is achieved. Link aggregation can balance the network load in multiple physical links, which can be used to implement the hierarchical load balance with various load balance policies, and improve the I/O bandwidth of the system efficiently. In addition, with the link-level fault tolerance of link aggregation and the monitoring mechanism of the nodes the high availability of the system can be fulfilled. The results of both theoretical analysis and preliminary performance evaluation show that the solution expands the processing capability and I/O bandwidth of the cluster system.