Patent ID: 7895161
Filing Date: 2011-02-22
Classification: G06F

Abstract:
1. A storage system comprising: a file server operatively connected to a host apparatus and configured to provide a plurality of directories in at least one file system having a directory structure, to the host apparatus; a storage subsystem operatively connected to the file server and configured to provide at least one volume for storing the at least one file system; and a management apparatus operatively connected respectively to the file server and the storage subsystem and configured to manage backup/restoration processing of an arbitrary directory contained in the at least one file system; wherein the file server includes a backup controller configured to receive a backup method selection request which sets a directory designated as a backup target from the management apparatus, wherein the file server contains a directory configuration information including: wherein the backup controller determines whether the hierarchy level of the designated directory is exceeding a first threshold value based on the directory configuration information, wherein the backup controller determines whether a number of file systems existing in the volume storing the file system which includes the designated directory is exceeding a second threshold value based on the directory configuration information, wherein the backup controller determines whether the usage ratio of the designated directory is exceeding a third threshold value based on the directory configuration, wherein the backup controller selects a volume backup method in case that the backup controller determines that the hierarchy level of the designated directory is not exceeding the first threshold value, and a number of file systems existing in the volume storing the file system including the designated directory is not exceeding the second threshold value, and the usage ratio of the designated directory is exceeding the third threshold value, wherein the backup controller selects a file backup method in case that the backup controller determines that the hierarchy level of the designated directory is exceeding the first threshold value, or a number of file systems existing in the volume storing the file system including the designated directory is exceeding the second threshold value, or the usage ratio of the designated directory is not exceeding the third threshold value, and wherein the backup controller executes backup processing to the designated directory according to the selected volume backup method or the selected file backup method.