DATA MANAGEMENT SYSTEM AND DATA MANAGEMENT METHOD

• US 20100241656A1
• Filed: 05/07/2010
• Published: 09/23/2010
• Est. Priority Date: 09/13/2006
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Iwasaki, Masaaki, Kumazawa, Kiyotake
• Granted Patent: US 8,364,645 B2
• Time in Patent Office: Days
• US Class Current: 707/769
• CPC Class Codes: G06F 11/1662 the resynchronized component or unit being a persistent storage device re-synchronization of failed mirror storage G06F11/2082; rebuild or reconstruction of parity RAID storage G06F11/1008
• CPC Class Codes: G06F 16/119 Details of migration of file systems migration mechanisms in storage systems G06F3/0647
• CPC Class Codes: G06F 3/0614 Improving the reliability of storage systems
• CPC Class Codes: G06F 3/0649 Lifecycle management
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

A file system transfer designation section for transferring the file system matching with file system transfer rules from the first volume of the first storage apparatus to the second volume of the second storage apparatus based on the first file system transfer rules, a file system storage information manager for updating storage information of the file system in accordance with transfer of the file system by the file system transfer designation section, and transmitting the updated file system storage information, and a search information manager for updating search information for searching the files based on a file search request from the client apparatus using the file system storage information sent by the file system storage information manager are provided.

Claims

1. A data management system including a host apparatus receiving requests from a client apparatus, a first storage apparatus having a first volume for storing a file system composed of a set of files, and a second storage apparatus having a second volume for storing the file system sent from the first storage apparatus, comprising:

a file system transfer designation section for transferring the file system matching with file system migration rules from the first volume of the first storage apparatus to the second volume of the second storage apparatus, based on the first file system migration rules;

a file system storage information manager for updating storage information of the file system in accordance with transfer of the file system by the file system transfer designation section, and transmitting the updated file system storage information;

a search information manager for updating search information for searching for a file based on a file search request from the client apparatus using the file system storage information sent from the file system storage information manager;

a mount determination section for determining whether or not a file system for a file corresponding to a file read request from the client apparatus is capable of being directly mounted from the second storage apparatus to the host apparatus,

wherein a file system transfer section transfers the file system from the second volume of the second storage apparatus to the first volume of the first storage apparatus that is capable of mounting the file system on the host apparatus in the event that the mount determination section determines that the file system can not be directly mounted.

4. The data management system according to claim 1, wherein the search information includes information indicating a host apparatus, a file system, attributes and a keyword list for each file;

information indicating a file and attributes for each keyword; and

information indicating a host apparatus, a storage apparatus and a volume as of the time before transfer, a host apparatus, a storage apparatus and a volume as of the time after transfer, and the storage state of the file system, for each file system.

5. The data management system according to claim 1, wherein the storage information further includes information indicating a host apparatus, a storage apparatus and a volume as of the time before transfer, a host apparatus, a storage apparatus and a volume as of the time after transfer, and the storage state of the file system, for each file system.

6. The data management system according to claim 1, wherein the file system transfer designation section and the file system storage information manager are provided in a file system transfer apparatus and the search information manager is provided in each of a plurality of the host apparatuses.

7. The data management system according to claim 1, wherein the search information manager is provided in an index server and the file system transfer designation section and the file system storage information manager are provided in the first storage apparatus.

8. The data management system according to claim 1, wherein the file system migration rules include fixed rules for transferring a file system, such as, for example, “

in the event that any files of the file system have not been subjected to reading or writing processing for a predetermined period, transfer this file system from the first storage apparatus to the second storage apparatus,” and

“

in the event that a final update time where the frequency of read/write processing during the preceding three months is low at 20% of the file systems mounted at the host apparatus is checked and one month or more has passed since the final update time, this file system is transferred from the first storage apparatus to the second storage apparatus.

2. The data management system according to claim 2, wherein the host apparatus includes a mount management section for managing mounting and un-mounting of the file system, the mount management section directly mounting the file system for the file corresponding to the file read request from the client apparatus from the second storage apparatus in the event that the mount determination section determines that direct mounting of the file system is possible.

3. The data management system according to claim 2, wherein the file system transfer section duplicates the file system from the second volume of the second storage apparatus onto the first volume of the first storage apparatus that is capable of mounting the file system on the host apparatus in the event that the mount determination section determines that the file system can not be directly mounted.

9. A data management method for a system including a host apparatus operative to receive requests from a client apparatus, a first storage apparatus having a first volume for storing a file system composed of a set of files, and a second storage apparatus having a second volume for storing the file system sent from the first storage apparatus, comprising:

transferring the file system matching with file system migration rules from the first volume of the first storage apparatus to the second volume of the second storage apparatus, based on the first file system migration rules;

updating storage information of the file system in accordance with transfer of the file system by the transferring step, and transmitting the updated file system storage information;

updating search information for searching for a file based on a file search request from the client apparatus using the file system storage information sent in the updating storage information step;

determining whether or not a file system for a file corresponding to a file read request from the client apparatus is capable of being directly mounted from the second storage apparatus to the host apparatus,

and transferring the file system from the second volume of the second storage apparatus to the first volume of the first storage apparatus that is capable of mounting the file system on the host apparatus in the event that the determining step determines that the file system can not be directly mounted.

10. The data management method according to claim 9, further comprising managing mounting and un-mounting of the file system in the host system, the managing step involving directly mounting the file system for the file corresponding to the file read request from the client apparatus from the second storage apparatus in the event that the determining step determines that direct mounting of the file system is possible.

11. The data management method according to claim 10, wherein the transferring step comprises duplicating the file system from the second volume of the second storage apparatus onto the first volume of the first storage apparatus that is capable of mounting the file system on the host apparatus in the event that the determining step determines that the file system can not be directly mounted.

12. The data management method according to claim 9, wherein the search information includes information indicating a host apparatus, a file system, attributes and a keyword list for each file;

information indicating a file and attributes for each keyword; and

information indicating a host apparatus, a storage apparatus and a volume as of the time before transfer, a host apparatus, a storage apparatus and a volume as of the time after transfer, and the storage state of the file system, for each file system.

13. The data management method according to claim 9, wherein the storage information further includes information indicating a host apparatus, a storage apparatus and a volume as of the time before transfer, a host apparatus, a storage apparatus and a volume as of the time after transfer, and the storage state of the file system, for each file system.

14. The data management system according to claim 9, wherein the file system migration rules include fixed rules for transferring a file system, such as, for example, “

in the event that any files of the file system have not been subjected to reading or writing processing for a predetermined period, transfer this file system from the first storage apparatus to the second storage apparatus,” and

“

in the event that a final update time where the frequency of read/write processing during the preceding three months is low at 20% of the file systems mounted at the host apparatus is checked and one month or more has passed since the final update time, this file system is transferred from the first storage apparatus to the second storage apparatus.”