Systems and methods for updating select files in an image backup

Patent metadata

Field	Value
Publication number	US-12216612-B2
Application number	US-202017120572-A
Country	US
Kind code	B2
Filing date	Dec 14, 2020
Priority date	Feb 7, 2020
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

Disclosed herein are systems and methods for updating select files in an image backup. In an exemplary aspect, a method comprises performing an image backup of a storage device comprising a plurality of files. The method comprises selecting a file of the plurality of files based on file selection rules and subsequent to the image backup, detecting that the file has exited a full consistency state. The method comprises monitoring the file to detect a return to the full consistency state. In response to detecting that the file has returned to the full consistency state, the method comprises identifying a physical address of at least one sector comprising the file on the storage device, and updating a version of the file previously captured in the image backup with a version of the file after returning to the full consistency state.

First claim

The invention claimed is:

1. A method for updating select files in an image backup, the method comprising:
performing an image backup of a storage device comprising a plurality of files;
selecting a file of the plurality of files based on file selection rules;
subsequent to the image backup, detecting that the file has exited a full consistency state, wherein the full consistency state is a state in which the file has remained unmodified for a given period of time;
monitoring the file to detect a return to the full consistency state, wherein detecting the return to the full consistency state comprises determining that the file has remained unmodified for the given period of time since exiting the full consistency state;
in response to detecting that the file has returned to the full consistency state, identifying a physical address of at least one sector comprising the file on the storage device;
updating a version of the file previously captured in the image backup with a latest version of the file after returning to the full consistency state by copying contents of the at least one sector to a corresponding physical address of the image backup;
performing another image backup of the storage device; and
in response to determining that the latest version of the file was created closer to the another image backup, including the latest version of the file in the another image backup and reverting the latest version of the file in the image backup to the version of the file previously captured in the image backup.

2. The method of claim 1 , wherein the image backup is either a full image backup or an incremental image backup.

3. The method of claim 1 , wherein the image backup is performed at a predetermined frequency, and wherein the image backup was performed at a first time, further comprising:
subsequent to performing the image backup, performing an additional image backup at a second time in accordance with the predetermined frequency; and
in response to determining that the file has not returned to the full consistency state while performing the additional image backup:
not finalizing the additional image backup;
waiting for the file to return to the full consistency state; and
finalizing the additional image backup by copying the contents of the at least one sector to the corresponding physical address of the image backup subsequent to the file returning to the full consistency state.

4. The method of claim 1 , wherein monitoring the file to detect the return to the full consistency state further comprises halting subsequent image backups.

5. The method of claim 1 , wherein the file selection rules indicate a set of criteria comprising at least one of:
(1) a minimum file size,
(2) a minimum number of access counts,
(3) a minimum number of dependencies, and
(4) a minimum number of state switches associated with a respective file that is to be selected.

6. The method of claim 1 , wherein the file exits and reenters the full consistency state multiple times subsequent to the image backup and prior to the another image backup, wherein each version of the file is updated in the image backup and replaces a prior version of the file in the image backup.

7. The method of claim 6 ,
wherein the another image backup comprises a subset of the plurality of files.

8. A system for updating select files in an image backup, the system comprising:
a hardware processor configured to:
perform an image backup of a storage device comprising a plurality of files;
select a file of the plurality of files based on file selection rules;
subsequent to the image backup, detect that the file has exited a full consistency state, wherein the full consistency state is a state in which the file has remained unmodified for a given period of time;
monitor the file to detect a return to the full consistency state, wherein detecting the return to the full consistency state comprises determining that the file has remained unmodified for the given period of time since exiting the full consistency state;
in response to detecting that the file has returned to the full consistency state, identify a physical address of at least one sector comprising the file on the storage device; and
update a version of the file previously captured in the image backup with a latest version of the file after returning to the full consistency state by copying contents of the at least one sector to a corresponding physical address of the image backup;
perform another image backup of the storage device; and
in response to determining that the latest version of the file was created closer to the another image backup, include the latest version of the file in the another image backup and revert the latest version of the file in the image backup to the version of the file previously captured in the image backup.

9. The system of claim 8 , wherein the image backup is either a full image backup or an incremental image backup.

10. The system of claim 8 , wherein the image backup is performed at a predetermined frequency, and wherein the image backup was performed at a first time, wherein the hardware processor is configured to:
subsequent to performing the image backup, perform an additional another image backup at a second time in accordance with the predetermined frequency; and
in response to determining that the file has not returned to the full consistency state while performing the additional another image backup:
not finalize the additional another image backup;
wait for the file to return to the full consistency state; and
finalize the additional another image backup by copying the contents of the at least one sector to the corresponding physical address of the image backup subsequent to the file returning to the full consistency state.

11. The system of claim 8 , wherein the hardware processor is further configured to monitor the file to detect the return to the full consistency state and halt subsequent image backups.

12. The system of claim 8 , wherein the file selection rules indicate a set of criteria comprising at least one of:
(1) a minimum file size,
(2) a minimum number of access counts,
(3) a minimum number of dependencies, and
(4) a minimum number of state switches associated with a respective file that is to be selected.

13. The system of claim 8 , wherein the file exits and reenters the full consistency state multiple times subsequent to the image backup and prior to the another image backup, wherein each version of the file is updated in the image backup and replaces a prior version of the file in the image backup.

14. The system of claim 13 ,
wherein the image backup comprises a subset of the plurality of files.

15. A non-transitory computer readable medium storing thereon computer executable instructions for updating select files in an image backup, including instructions for:
performing an image backup of a storage device comprising a plurality of files;
selecting a file of the plurality of files based on file selection rules;
subsequent to the image backup, detecting that the file has exited a full consistency state, wherein the full consistency state is a state in which the file has remained unmodified for a given period of time;
monitoring the file to detect a return to the full consistency state, wherein detecting the return to the full consistency state comprises determining that the file has remained unmodified for the given period of time since exiting the full consistency state;
in response to detecting that the file has returned to the full consistency state, identifying a physical address

Assignees

• Acronis Int Gmbh

Inventors

• Sergeev Alexey
• Strogov Vladimir
• Beloussov Serguei
• Protasov Stanislav

Classifications

• G06F16/178 Primary

  Techniques for file synchronisation in file systems · CPC title

• G06F11/1448

  Management of the data involved in backup or backup restore · CPC title

• G06F2201/82

  Solving problems relating to consistency · CPC title

• G06F11/1451

  by selection of backup contents · CPC title

• G06F16/128 Primary

  Details of file system snapshots on the file-level, e.g. snapshot creation, administration, deletion (error detection or correction of the data by redundancy in operations or in hardware G06F11/14, G06F11/16) · CPC title