COMPUTER SYSTEM AND FRAME TRANSFER BANDWIDTH OPTIMIZATION METHOD

摘要

A computer system and frame transfer bandwidth optimization method capable of data transfer bandwidth control on a logical unit basis and according to the relevant storage tier in a storage apparatus (4) are suggested. When encapsulating a first frame (Fr1, Fr2, Fr3), in which transfer target data is stored, in a second frame (LUO) and sending or receiving it between first and second nodes, the number of frames, that is, the number of a multiplicity of first frames to be stored in one second frame, is determined in advance for each storage tier or logical unit defined within a storage apparatus (4); and the multiplicity of first frames as many as the number of frames that is set in advance to a logical unit, which is a write destination or read destination of the relevant data, or a storage tier to which the relevant logical unit belongs, are stored in the second frame and sent to the other end of a communication link (53). Preferably, the number of stacking frames is set to a larger value for a higher-level storage tier. The number of stacking frames is obtained from a logical unit and tier association management table. The system and method are particularly useful when integrating iSCSI frames and Fibre Channel frames on a Fibre Channel over Ethernet (FCoE) link. The bandwidth can be controlled on a storage tier basis by setting a different number of stacking frames for each storage tier.