Search International and National Patent Collections
|1. (WO2017199424) COMPUTER SYSTEM|
A computer system according to an embodiment comprises a storage system having a first storage device and a second storage device and also comprises a host and a management computer. Each of the first and second storage devices has one or more volumes accessible to the host, and compresses write data that is written to the one or more volumes. The storage system manages a first volume of the first storage device and a second volume of the second storage device as a volume pair, and stores, in both the first volume and the second volume, data requested by the host to be written to the volume pair. The computer system adjusts the amount of data stored in a compressed state in the volume pair, so that the volume pair provides a service level at least equal to a required service level set for the volume pair.