METHOD FOR REDUNDANCY AND SWITCHING OF COMMUNICATION PATH IN INTERCONNECTION NETWORK AMONG COMPUTERS, SERVER DEVICE FOR IMPLEMETING THIS METHOD, SERVER MODULE FOR THE SAME, AND PROGRAM FOR THE SAME

摘要

PPROBLEM TO BE SOLVED: To solve the problem that a conventional self-evident communication path redundancy system has while maintaining quick switch operation of communication paths when a failure occurs on the communication path. PSOLUTION: During normal operation, only one of redundant communication paths is used to transfer data between hosts A and B. In the host A, data are read from a disk, stored in a segment (RDMA region) on a main memory, and the data are transferred to the host B by using an LMR group 1 via a communication path 1 by RDMA. In the host B, the LMR group 1 is used and the data received from the communication path 1 are stored in the main memory. When the failure occurs in the communication path 1, the hosts A and B switch the LMR group to be used for RDMA from the LMR group 1 to LMR group 2 and restarts data transfer by the RDMA from the segment on the main memory which is not transferred to the host B yet. PCOPYRIGHT: (C)2010,JPO&INPIT