Snapshot management method, snapshot management apparatus, and computer-readable, non-transitory medium

• US 8,799,709 B2
• Filed: 02/15/2011
• Issued: 08/05/2014
• Est. Priority Date: 03/09/2010
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Iikura, Fumi, Matsumoto, Yasuhide
• Primary Examiner(s): LOHN, JOSHUA A
• Application Number:
  US12/929,785
• Publication Number:
  US 20110225582A1
• Time in Patent Office: 1,267 Days
• Field of Search: 714/15, 714/19, 714/21
• US Class Current: 714/19
• CPC Class Codes: G06F 11/1415 at system level
• CPC Class Codes: G06F 2201/815 Virtual middleware or OS functionality using virtual machines to implement generic software techniques for error detection or fault masking G06F11/1484
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data

Abstract

A snapshot management method includes detecting a change in a configuration of a virtual machine; recording, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected; and determining a stable operation of the virtual machine by monitoring an operation status of the virtual machine and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition.

Claims

1. A snapshot management method executed by a computer, the snapshot management method comprising:

detecting a change in a configuration of a virtual machine;

recording, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected; and

determining a stable operation of the virtual machine by monitoring an operation status of the virtual machine after the virtual machine has been rebooted, and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition to prevent the last recorded snapshot from being saved.

2. The snapshot management method according to claim 1, wherein

the detecting includes detecting the change in the configuration of the virtual machine based on communications performed by the virtual machine via a predetermined port.

3. The snapshot management method according to claim 1, further comprising:

monitoring communications performed by the virtual machine via a predetermined port and detecting an abnormality in the communications based on a change in a communications amount, wherein

the determining includes deleting, from the storage unit, the last recorded snapshot for the virtual machine when the abnormality in the communications is detected.

4. The snapshot management method according to claim 1, wherein

the determining includes causing a display device to display a screen page used for selecting whether to delete the snapshot, and deleting the snapshot according to an input made via the screen page.

5. A snapshot management apparatus comprising:

a configuration change detection unit that detects a change in a configuration of a virtual machine;

a snapshot recording unit that records, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected; and

a stable operation determining unit that determines a stable operation of the virtual machine by monitoring an operation status of the virtual machine after the virtual machine has been rebooted, and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition to prevent the last recorded snapshot from being saved.

6. The snapshot management apparatus according to claim 5, wherein

the configuration change detection unit detects the change in the configuration of the virtual machine based on communications performed by the virtual machine via a predetermined port.

7. The snapshot management apparatus according to claim 5, further comprising:

a communications monitoring unit that monitors communications performed by the virtual machine via a predetermined port and detects an abnormality in the communications based on a change in a communications amount, wherein

the stable operation determining unit deletes, from the storage unit, the last recorded snapshot for the virtual machine when the abnormality in the communications is detected.

8. The snapshot management apparatus according to claim 5, wherein

the stable operation determining unit causes a display device to display a screen page used for selecting whether to delete the snapshot, and deletes the snapshot according to an input made via the screen page.

9. A snapshot management apparatus comprising:

a processor to detect a change in a configuration of a virtual machine, to record, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected, and to determine a stable operation of the virtual machine by monitoring an operation status of the virtual machine after the virtual machine has been rebooted, and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition to prevent the last recorded snapshot from being saved.

10. A computer-readable, non-transitory medium storing a program that causes a computer to execute a method comprising:

detecting a change in a configuration of a virtual machine;

recording, in a storage unit, a snapshot of a file system of the virtual machine when the change in the configuration is detected; and

determining a stable operation of the virtual machine by monitoring an operation status of the virtual machine after the virtual machine has been rebooted, and deleting, from the storage unit, the last recorded snapshot for the virtual machine when the operation status satisfies a predetermined condition to prevent the last recorded snapshot from being saved.

11. The computer-readable, non-transitory medium according to claim 10, wherein

the detecting includes detecting the change in the configuration of the virtual machine based on communications performed by the virtual machine via a predetermined port.

12. The computer-readable, non-transitory medium according to claim 10, wherein the method further comprises:

monitoring communications performed by the virtual machine via a predetermined port and detecting an abnormality in the communications based on a change in a communications amount, wherein

the determining includes deleting, from the storage unit, the last recorded snapshot for the virtual machine when the abnormality in the communications is detected.

13. The computer-readable, non-transitory medium according to claim 10, wherein

the determining includes causing a display device to display a screen page used for selecting whether to delete the snapshot, and deleting the snapshot according to an input made via the screen page.