Storage system, file migration method and computer program product

• US 20070055715A1
• Filed: 11/25/2005
• Published: 03/08/2007
• Est. Priority Date: 09/07/2005
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Achiwa, Kyosuke
• Granted Patent: US 7,590,671 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/119 Details of migration of file systems migration mechanisms in storage systems G06F3/0647
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

A storage system including a file migration server, a file migration client, and an LDEV migration engine. The file migration client displays on a management terminal a GUI for guiding a file migration. The file migration server, upon receipt of a file migration command to migrate a part of files stored in a source logical device to a destination logical device, migrates all of the files stored in the source logical device to the destination logical device without involving a change in directory path.

Claims

1. A storage system, comprising:

a plurality of physical devices providing a plurality of logical devices for storing one or more files;

a file system for managing the files stored in the logical devices with a directory tree structure;

a file migration server for controlling migration of the files stored in the logical devices;

a file migration client for displaying a GUI for guiding file migration, and conveying an administrator'"'"'s file migration command to the file migration server; and

first file migration means for migrating all of one or more files stored in a source logical device selected from the logical devices by the administrator to a destination logical device selected from the logical devices by the administrator, without a change in directory path for any of the files;

upon a file migration command to migrate a part of the files stored in the source logical device to the destination logical device being input to the file migration client via the GUI, the file migration server controlling the first file migration means to migrate all of the files stored in the source logical device to the destination logical device.

2. The storage system according to claim 1 further comprising second file migration means for executing file migration involving a change in directory path.

3. The storage system according to claim 2,

wherein each of the physical devices is logically classified into one of a plurality of storage tiers;

and

wherein the GUI includes a screen for displaying, in relation to each other, the directory paths of the files and the storage tiers to which the physical devices storing the files belong.

4. The storage system according to claim 3, wherein the GUI includes a screen for displaying a list of one or more other files stored in the logical device storing a file designated as a file move target.

5. The storage system according to claim 4 further comprising third file migration means for creating a new file system containing a file to be moved, and mounting the new file system in a source directory.

6. The storage system according to claim 5, wherein the GUI includes a screen for requesting selection of which of the first file migration means, the second file migration means, and the third file migration means is to be used for file migration.

7. The storage system according to claim 6, wherein the GUI includes a screen for, subject to any of the first file migration means, the second file migration means, and the third file migration means having been selected as the file migration means, displaying a list of one or more storage tiers to which one or more candidate destination physical devices for the file, from among the physical devices, belong.

8. The storage system according to claim 7, wherein the GUI includes a screen for, subject to any storage tier from among the list of storage tiers having been selected after the selection of either of the first file migration means or the third file migration means as the file migration means, displaying a list of one or more “

free”

logical devices belonging to the selected storage tier.

9. The storage system according to claim 7, wherein the GUI includes a screen for, subject to any storage tier from among the list of storage tiers having been selected after the selection of the second file migration means as the file migration means, displaying a list of one or more directory paths belonging to the selected tier.

10. The storage system according to claim 2 further comprising a storage controller for controlling data input/output to/from the physical devices, and a NAS server for processing a file access request from a NAS client, wherein the first file migration means is a function of the storage controller, and the second file migration means is a function of the NAS server.

11. A file migration method comprising the steps of:

displaying a GUI for guiding file migration;

receiving via the GUI a file migration command to migrate a part of one or more files stored in a source logical device to a destination logical device; and

migrating all of the files stored in the source logical device to the destination logical device without a change in directory path for any of the files.

12. The file migration method according to claim 11, wherein the GUI includes a screen for displaying, in relation to each other, the directory paths of one or more files and the storage tiers to which physical devices storing the files belong.

13. The file migration method according to claim 12, wherein the GUI includes a screen for displaying a list of one or more other files stored in a logical device storing a file designated as a file move target.

14. The file migration method according to claim 13, wherein the GUI includes a screen for requesting selection of which of first file migration means for migrating all of the files stored in the source logical device to the destination logical device without a change in directory path for any of the files, second file migration means for executing file migration involving a change in directory path, and third file migration means for creating a new file system containing a file to be moved and mounting the new file system in a source directory, in order to conduct file migration.

15. The file migration method according to claim 14, wherein the GUI displays a screen for, subject to any of the first file migration means, the second file migration means, and the third file migration means having been selected as the file migration means, displaying a list of one or more storage tiers to which one or more candidate destination logical devices for the file belong.

16. The file migration method according to claim 15, wherein the GUI includes a screen for, subject to any storage tier from among the list of storage tiers having been selected after the selection of either of the first file migration means or the third file migration means as the file migration means, displaying a list of one or more “

free”

logical devices belonging to the selected storage tier.

17. The file migration method according to claim 15, wherein the GUI includes a screen for, subject to any storage tier from among the list of storage tiers having been selected after the selection of the second file migration means as the file migration means, displaying a list of one or more directory paths belonging to the selected tier.

18. A computer program product comprising a computer program to make a storage system execute the steps of:

displaying a GUI for guiding file migration;

receiving via the GUI a file migration command to migrate a part of one or more files stored in a source logical device to a destination logical device; and

migrating all of the files stored in the source logical device to the destination logical device without a change in directory path for any of the files.