Hitachi, Ltd.

Masayuki Gomyo

Keisuke Suzuki

Kouji Iwamitsu

Shinri Inoue

Takuya Ogusu

Masayuki Hayashi

Virtual first logical volumes are provided to a host, a virtual second logical volume correlated with any one of the first logical volumes is created in a storage node in correlation with a storage control module disposed in the storage node, a correspondence relationship between the first and second logical volumes is managed as mapping information, a storage node which is an assigning distribution of an I/O request is specified on the basis of the mapping information in a case where the I/O request in which the first logical volume is designated as an I/O destination is given from the host, the I/O request is assigned to the storage control module of its own node in a case where the specified storage node is its own node, and the I/O request is assigned to another storage node in a case where the specified storage node is another storage node.

System, and control method and program for input/output requests for storage systems

A computer has processors each including computation cores; memories, and an IO device, and includes NUMA nodes. The computer holds pattern management information to manage patterns and comprises a control module to determine a pattern to be applied to the computer. The pattern management information includes policy information including a policy on placement of a transfer-use memory area in the NUMA nodes, a policy on the placement of driver management information in the NUMA nodes, and a policy on allocation of computation cores that execute data transfer in the NUMA nodes, for each of the plurality of patterns. The control module applies each of the patterns to the computer based on the pattern management information, to measure IO performance in each of the patterns, and determine a pattern being highest in IO performance as a pattern to be applied to the computer.

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Tokyo, Japan

Masayuki Gomyo