Computer system and storage control method of the same

摘要

A computer system dynamically assigns the storage capacity from pool volumes to the access target in the higher-level system, and can immediately respond to the change of the status of the pool comprising the pool volumes. A control device sets the access target for the host computer to access, each time a write to the access target occurs from the host computer, from the pool assigned to the access target to the write area of the access target. The control device performs the processing of assigning the storage capacity from the logical volume in the pool. The control device defines the logical volumes in advance, compiles the same into a management group as a preliminary for the pool and, in accordance with the change of the pool status, adds the logical volumes from the management group to the pool.

主权项

1. A computer system, comprising:
a control device for processing a write access from a host computer; and at least one storage device, wherein the control device is configured to: provide an access target to be accessed by the host computer, provide a first pool, having one or more logical volumes provided by the at least one storage device and which are arranged in a hierarchy, provide a second pool, having one or more logical volumes provided by the at least one storage device and which are arranged in a hierarchy, assign a storage capacity from the one or more logical volumes of the first pool to a write destination area of the access target of a write request from the host computer, add at least one of the one or more logical volumes in the second pool to the first pool, according to a status of the first pool, and add at least one logical volume provided by the at least one storage device to the second pool, according to a status of the second pool, wherein the at least one logical volume of the second pool added to the first pool belongs to a same part of the hierarchy in the first pool as in the second pool.