WO2007068600B1 - Generating backup sets to a specific point in time - Google Patents

Generating backup sets to a specific point in time

Info

Publication number
WO2007068600B1
WO2007068600B1 PCT/EP2006/069121 EP2006069121W WO2007068600B1 WO 2007068600 B1 WO2007068600 B1 WO 2007068600B1 EP 2006069121 W EP2006069121 W EP 2006069121W WO 2007068600 B1 WO2007068600 B1 WO 2007068600B1
Authority
WO
WIPO (PCT)
Prior art keywords
backup
versions
time
data objects
point
Prior art date
Application number
PCT/EP2006/069121
Other languages
French (fr)
Other versions
WO2007068600A2 (en
WO2007068600A3 (en
Inventor
Kenneth Eugene Hannigan
David Maxwell Cannon
Original Assignee
Ibm
Ibm Uk
Kenneth Eugene Hannigan
David Maxwell Cannon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibm, Ibm Uk, Kenneth Eugene Hannigan, David Maxwell Cannon filed Critical Ibm
Priority to JP2008544943A priority Critical patent/JP4996619B2/en
Priority to EP06830225A priority patent/EP1969471A2/en
Priority to CN200680046646.7A priority patent/CN101326497B/en
Publication of WO2007068600A2 publication Critical patent/WO2007068600A2/en
Publication of WO2007068600A3 publication Critical patent/WO2007068600A3/en
Publication of WO2007068600B1 publication Critical patent/WO2007068600B1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • G06F11/1448—Management of the data involved in backup or backup restore
    • G06F11/1451—Management of the data involved in backup or backup restore by selection of backup contents
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • G06F11/1458—Management of the backup or restore process
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1446—Point-in-time backing up or restoration of persistent data
    • G06F11/1458—Management of the backup or restore process
    • G06F11/1469—Backup restoration techniques
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
    • G06F2201/835—Timestamp

Abstract

A system, method and computer program product are provided for generating backup sets for a specific point in time from backup data stored in a backup storage device. A backup set, in accordance with an illustrative embodiment, is a collection of the files and data that would have been the most recently backed-up version of a computer's files and data at the particular point in time if the backup set had been created at that point in time. In order to generate the backup set, versions of data objects are identified in the backup storage system that have backup timestamps equal to or prior to the designated point in time and that have deactivation times that are after the designated point in time. In addition, a mechanism for deleting versions of data objects based on a retention time and an inactive version limit is provided.

Claims

AMENDED CLAIMS received by the International Bureau on 3 January 2008 (03.01.2008)
1. A computer program product comprising a computer usable medium having a computer readable program, wherein the computer readable program, when executed on a computing device, causes the computing device to: receive a request for generation of a backup set, wherein the request includes a point in time for which the backup set is to be generated, wherein the point in time is a point in time prior to a current time; identify versions of data objects in a backup storage system associated with the most recently backed-up version of the data objects at the point in time; and store the identified versions of data objects as the backup set for the point in time.
2. The computer program product of claim 1, wherein the computer readable program causes the computing device to identify versions of data objects in a backup storage system by: identifying versions of data objects in the backup storage system that are the most recent versions of the data objects at the point in time and that have deactivation tiroes after the point in time.
3. The computer program product of claim 1, wherein the computer readable program causes the computing device to identify versions of data objects in a backup storage system bys identifying a first candidate set of versions of data objects in a backup storage system that have backup timestamps equal to or prior to the point in time; and identifying a second candidate set of versions of data objects in the first candidate set that have deactivation times after the point in time.
4. The computer program product of claim 3, wherein the computer readable program causes the computing device to identify a first candidate set of versions of data objects by: retrieving backup catalog information for the versions of data objects; searching entries in the backup catalog information to identify entries having a backup timestamp that is equal to or prior to the point in time; and storing entries having a backup timestamp that is equal to or prior to the point in time in the first candidate set.
5. The computer program product of claim 4, wherein the computer readable program causes the computing device to identify a second candidate set of versions of data objects in the firsc candidate set by: searching the entries in the first candidate set to identify entries having a deactivation time that is after the point in time; and storing entries having a deactivation time that is after the point in time in, the second candidate set.
6. The computer program product of claim 1, wherein the computer readable program further causes the computing device to: search the versions of the data objects to identify data objects having a backup timestamp that is older than a retention time parameter; determine, for each version of a data object, in the versions of the data objects, having a backup timestamp older than the retention time parameter, whether the version is an active version of the data object; and delete the version of the data object if the version of the data object is not an active version of the data object.
7. The computer program product of claim 1, wherein the computer readable program further causes the computing device to: search the versions of the data objects to identify data objects for which a number of versions maintained in the backup storage system is greater than a version limit; and delete an oldest version, of the versions of data objects that have a number of versions maintained in the backup storage system that is greater than the version limit.
8. The computer program product of claim 1, wherein the request for generation of a backup set comprises at least one parameter designating a type of data object to include in the backup set, and wherein the computer readable program further causes the computing device to identify versions of data objects in a backup storage system by filtering data objects to be included in che backup set based on the at least one parameter.
9. The computer program product of claim 8, wherein the at least one parameter designating the type of data object to include in the backup set designates at least one of an identifier of one or more client computing devices for which the backup set is to be generated, an identifier of one or more server computing devices for which the backup set is to be generated, or an identifier of one or more directories and sub-dirβαtories to include in the backup set,
10. The computer program product of claim 1, wherein the computer readable program causes the computing device to identify versions of data objects in a backup storage system in a single operation that is executed on each data object in the backup storage system meeting criteria set forth in the request for generation of a backup set.
11. A system, comprising; a processor; a memory couplable to the processor; and, a storage device couplable to the processor, wherein the memory is operable to store instructions which, when executed by the processor, cause the processor to: receive a request for generation of a backup set, wherein the request includes a, point in time for which the backup set is to be generated, wherein the point in time is a point in time prior to a, current time; identify versions of data objeccs in a backup storage system associated with the most recently backed-up version o£ the data objects at the point in time; and store the identified versions of data objects as the backup set for the point; in time,
12. The system of claim 11, wherein the instructions cause the processor to identify versions of data objects in a backup storage system by: identifying versions of data, objects in the backup storage system that are the most recent versions of the data objects at the point in time and that have deactivation times after the point in time.
13. The system of claim 11, wherein the instructions cause the processor to identify versions of data objects in a backup storage system by; identifying a first candidate set of versions of data, objects in a backup storage system that have backup timestamps equal to or prior to the point in time; and identifying a second candidate set of versions of data objects in the first candidate set that have deactivation times after the point in time.
14. The system of claim 13, wherein the instructions cause tbe processor to identify a first candidate set of versions of data, objects by; retrieving backup catalog information for the versions of data objects; searching entries in the backup catalog information to identify entries having a backup timestamp that is equal to or prior to the point in time; arid storing entries having a backup timestamp that is equal to or prior to the point in time in the first candidate set.
15. The system of claim 14, wherein the instructions cause the processor to identify a second candidate set of versions of data, objects in the first candidate set by: searching the entries in the first candidate set to identify entries having a deactivation time that is after the point in time; and storing entries having a deactivation time that is after the point in time in the second candidate set.
16. The system of claim 11, wherein the instructions further cause the processor to: search the versions of the data objects to identify data objects having a backup timestamp that is older than a retention time parameter; determine, for each version of a data object, in the versions of the data objects, having a backup timeβtamp older than the retention time parameter, whether the version is an active version of. the data object; and delete the version of the data object if the version of the data object is not an active version of the data object.
17. The system of claim 11, wherein the instructions further cause the processor to: search the versions of the data objects to identify data objects for which a number of versions maintained in the backup storage system is greater than a version limit; and delete an oldest version of the versions of data objects that have a number of versions maintained in the backup storage system that is greater than the version limit.
18. The system of claim 11, wherein the request for generation of a backup set comprises at least one parameter designating a type of data object to include in the backup set, and wherein the instructions further cause the processor to identify versions of data objects in a backup storage system by filtering data objects to be included in the backup set based on the at least one parameter.
19. The computer program product of claim 18, wherein the at least one parameter designating the type of data object to include in the backup set designates at least one of an identifier of one or more client computing devices for which the backup set is to be generated, an identifier of one or more server computing devices for which the backup set is to be generated, or an identifier of one or more directories and sub-directories to include in the backup set.
20. The system of claim 11, wherein the instructions cause the processor to identify versions of data objects in a backup storage system in a single operation that is executed on each data object in the backup storage system meeting criteria set forth in the request for generation of a backup set.
21. A method, in a data processing system, for generating a backup set, comprising: receiving a request for generation of a backup set, wherein the request includes a point in time for which the backup set is to be generated, wherein the point in time is a point in time prior to a current time; identifying versions of data objects in a backup storage system associated with the most recently backed-up version of the data objects at the point in time; and storing the identified versions ot data objects as the backup set for the point in time.
22. The method of claim 21, further comprising the step of:
identifying versions of data objects in a backup storage system that are associated with the most recent versions of the data objects at the point in time and that have deactivation times after the point in time.
21. The method of claim 21, wherein identifying versions of data objects in a backup storage system comprises: identifying a first candidate set of versions of data objects in a backup storage system that have backup timestamps equal to or prior to the point in time; and identifying a second candidate set of versions of data objects in the first candidate set that have deactivation times after the point in time.
24. The method of claim 23, wherein the identifying a first candidate set of versions of data objects comprises: retrieving backup catalog information for the versions of data objects; searching entries in the backup catalog information to identify entries having a backup timestamp that is equal to or prior to the point in time; and storing entries having a backup timestamp that is equal to or prior to the point in time in the first candidate set.
25. The method of claim 24, wherein the identifying a second candidate set of versions of data objects in the first candidate set comprises: searching the entries in the first candidate set to identify entries having a deactivation time chat is after the point in time? and storing entries having a deactivation time that is after the point in time in the second candidate set.
26. The method of claim 21, further comprising: 39
searching the versions of the data objects to identify data objects having a backup timestamp that is older than a retention time parameter; determining, for each version of a, data object, in the versions of the data, objects, having a backup tiinestamp older than the retention time parameter, whether the version is an active version of the data object; and deleting the version of the data object if the version of the data object is not an active version of the data object. '
27. The method of claim 21, further comprising: searching the versions of the data objects to identify data objects for which a number of versions maintained in the backup storage system is greater than a version limit; and deleting an oldest version of the versions of data objects that have a number of versions maintained in the backup storage system that is greater than the version limit,
28. The method of claim 21, wherein the request for generation of a backup set comprises at least one parameter designating a type of data object to include in the backup set, and the method further comprising: identifying versions of data, objects in a backup storage system by filtering data objects to be included in the backup set based on the at least one parameter.
29. The method of claim 28, wherein, the at least one parameter designating the type of data, object to include in the backup set designates at least one of an identifier of one or more client computing devices for which the backup set is to be generated, an identifier of one or more server computing devices for Which the backup set is to be generated, OV an identifier of one or more directories and sub-directories to include in the backup set .
30. The method of claim 21, further comprising identifying versions of data objects in a backup storage system in a single operation that is executed on each data object in the backup storage system meeting criteria set forth in the request for generation of a backup set,
31. An apparatus for generating a backup set comprising: means for receiving a request for generation of a backup set, wherein the request includes a point in time for which the backup set is to be generated, wherein the point in time is a point in time prior to a current time; means for identifying versions of data objects in a backup storage system associated with the most recently backed-up version oE the data objects at the point in time,- and, means for storing the identified versions of data objects as the backup set for the point in time.
PCT/EP2006/069121 2005-12-13 2006-11-30 Generating backup sets to a specific point in time WO2007068600A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008544943A JP4996619B2 (en) 2005-12-13 2006-11-30 Method and program for operating a system comprising a backup server and a backup storage system
EP06830225A EP1969471A2 (en) 2005-12-13 2006-11-30 Generating backup sets to a specific point in time
CN200680046646.7A CN101326497B (en) 2005-12-13 2006-11-30 System and method for generating backup sets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/301,624 US7904425B2 (en) 2005-12-13 2005-12-13 Generating backup sets to a specific point in time
US11/301,624 2005-12-13

Publications (3)

Publication Number Publication Date
WO2007068600A2 WO2007068600A2 (en) 2007-06-21
WO2007068600A3 WO2007068600A3 (en) 2008-01-03
WO2007068600B1 true WO2007068600B1 (en) 2008-02-28

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PCT/EP2006/069121 WO2007068600A2 (en) 2005-12-13 2006-11-30 Generating backup sets to a specific point in time

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US (1) US7904425B2 (en)
EP (1) EP1969471A2 (en)
JP (1) JP4996619B2 (en)
CN (1) CN101326497B (en)
WO (1) WO2007068600A2 (en)

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JP4996619B2 (en) 2012-08-08
CN101326497A (en) 2008-12-17
US20070136381A1 (en) 2007-06-14
EP1969471A2 (en) 2008-09-17
WO2007068600A2 (en) 2007-06-21
WO2007068600A3 (en) 2008-01-03
US7904425B2 (en) 2011-03-08
CN101326497B (en) 2011-09-28

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