System and method for cluster file system synchronization

• US 20070156789A1
• Filed: 12/30/2005
• Published: 07/05/2007
• Est. Priority Date: 12/30/2005
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Semerdzhiev, Krasimir, Dimitrov, Nikolai, Iliev, Hristo
• Granted Patent: US 7,689,600 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/1787 Details of non-transparently synchronising file systems
• CPC Class Codes: G06F 16/185 Hierarchical storage management [HSM] systems, e.g. file migration or policies thereof details of archiving G06F16/11
• CPC Class Codes: Y10S 707/99954 Version management

Abstract

A system and method for file system synchronization is described. A method described includes saving content of a cluster file system (CFS) archive to a CFS database, detecting a change made in the CFS database with respect to the CFS archive, comparing an index of the CFS database with an index of the file system, and updating the file system to reflect the change in the CFS database.

Claims

1. A method of file system synchronization comprising:

saving content of a cluster file system (CFS) archive to a CFS database;

detecting a change made in the CFS database with respect to the CFS archive;

comparing an index of the CFS database with an index of a local file system; and

updating the local file system to reflect the change in the CFS database.

2. The method of claim 1, further comprising:

deploying the CFS archive to the file system.

3. The method of claim 1, wherein the comparing further comprises:

determining if an archive version number is identical to both of the indexes.

4. The method of claim 1, wherein the comparing further comprises:

determining if an archive checksum is identical to both of the indexes.

5. The method of claim 1, wherein the comparing is performed by a bootstrap associated with the local file system.

6. The method of claim 1, wherein the updating further comprises:

saving at least a portion of the content of the CFS archive stored in the database; and

saving a checksum associated with the CFS archive stored in the database in the local file system index.

7. The method of claim 1, wherein the updating further comprises:

saving at least a portion of the content of the CFS archive stored in the database; and

saving a version number associated with the CFS archive stored in the database in the local file system index.

8. An article of manufacture including program code which, when executed by a machine, causes the machine to perform a method, the method comprising:

saving content of a cluster file system (CFS) archive to a CFS database;

detecting a change made in the CFS database with respect to the CFS archive;

comparing an index of the CFS database with an index of a local file system; and

updating the local file system to reflect the change in the CFS database.

9. The method of claim 8, further comprising:

deploying the CFS archive to the file system.

10. The method of claim 8, wherein the comparing further comprises:

determining if an archive version number is identical to both of the indexes.

11. The method of claim 8, wherein the comparing further comprises:

determining if an archive checksum is identical to both of the indexes.

12. The method of claim 8, wherein the comparing is performed by a bootstrap associated with the local file system.

13. The method of claim 8, wherein the updating further comprises:

saving at least a portion of the content of the CFS archive stored in the database; and

saving a checksum associated with the CFS archive stored in the database in the local file system index.

14. The method of claim 8, wherein the updating further comprises:

saving at least a portion of the content of the CFS archive stored in the database; and

saving a version number associated with the CFS archive stored in the database in the local file system index.

15. A system comprising:

a physical machine including;

at least one instance of a software platform,

a local file system for the at least one instance, and

a bootstrap for the at least one instance, the bootstrap to update the local file system; and

a cluster file system (CFS) database, the CFS database to store information regarding at least one CFS archive deployed on the physical machine.

16. The system of claim 15, wherein the CFS database further comprises:

an index to store version numbers and/or checksums of the at least one CFS archive deployed on the physical machine.

17. The system of claim 15, wherein the local file system further comprises:

an index to store version numbers and/or checksums of the at least one CFS archive deployed on the physical machine.

18. The system of claim 15, wherein the at least one instance is a J2EE instance.