Patent ID: 7870094
Filing Date: 2011-01-11
Classification: G06F

Abstract:
1. A continuous data protection method of continuously protecting data stored in a protection target volume of a storage by use of a copy data storage volume to store therein copy data created by copying the data and an update request storage volume to store therein an update request from a host to the protection target volume, comprising the step, conducted by a management server to manage the storage, of: calculating a selection condition of a candidate for the copy data storage volume and a selection condition of a candidate for the update request storage volume on the basis of a continuous data protection period in which the data of the protection target volume is continuously protected and a disk capacity and an update access characteristic of the protection target volume; and selecting candidates for the copy data storage volume and candidates for the update request storage volume; and a step of setting the selection conditions, the step comprising: setting a value based on the disk capacity of the protection target volume as a disk capacity of the copy data storage volume; setting a value based on an upper-limit value of the update access characteristic of the protection target volume as an update access characteristic of the copy data storage volume; setting a value based on a product between the upper-limit value of the update access characteristic of the protection target volume and the continuous data protection period as a disk capacity of the update request storage volume; and a value based on the upper-limit value of the update access characteristic of the protection target volume as an update access characteristic of the update request storage volume.