Method and apparatus for managing replication volumes

• US 6,925,541 B2
• Filed: 06/12/2002
• Issued: 08/02/2005
• Est. Priority Date: 06/12/2002
• Status: Expired due to Fees

• Current Assignee: Hitachi America Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Yamagami, Kenji
• Primary Examiner(s): GOODARZI, NASSER MOAZZAMI
• Application Number:
  US10/170,804
• Publication Number:
  US 20040205310A1
• Time in Patent Office: 1,147 Days
• Field of Search: 711/114, 711161-162, 711170-173, 714/6, 707202-205, 709/203, 386/125
• US Class Current: 711/162
• CPC Class Codes: G06F 11/2058 using more than 2 mirrored copies
• CPC Class Codes: G06F 11/2069 Management of state, configuration or failover
• CPC Class Codes: Y10S 707/99953 Recoverability
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

Replication of volumes is facilitated by tools which provide and manage a pool of mirror volumes. Primary (or production) volumes containing user provided data are easily mirrored by volumes selected from the pool. User criteria can be provided to limit the selection of candidate volumes for mirroring.

Claims

1. A method for storage management comprising:

receiving a command of a first kind, said command comprising first information;

identifying at least one production volume based on said first information;

selecting a candidate storage volume from among a plurality of storage volumes; and

initiating mirroring of said production volume with said candidate storage volume, wherein said candidate storage volume is a mirror volume,

wherein said first information is representative of a plurality of production volumes, said selecting includes determining a corresponding candidate storage volume for each of said production volumes, and said initiating includes initiating mirroring of each of said production volumes with its corresponding candidate mirror volume.

2. The method of claim 1 wherein said first information is representative of an application program, said application program having associated therewith a plurality of data objects, wherein said identifying includes identifying production volumes which collectively provide storage for all data files comprising one or more of said data objects.

3. The method of claim 2 wherein said identifying further includes interacting with said application to obtain identification information representative of said production volumes.

4. The method of claim 2 wherein said identifying further includes obtaining identification information representative of said production volumes from a data store.

5. The method of claim 2 wherein said command further comprises second information representative of a first data object, wherein said identifying includes identifying production volumes which collectively provide storage for all data files comprising said first data object.

6. The method of claim 2 wherein said application is a database application and each of said data objects is representative of data files which constitute an instance of a database, said data files being stored in one or more production volumes.

7. The method of claim 2 wherein said application is a storage volume manager and each of said data objects is representative of a logical volume, said logical volume comprising one or more production volumes.

8. The method of claim 1 further including designating said candidate storage volume as being in use as a mirror volume so that said candidate storage volume is not selected in a subsequent selecting step.

9. The method of claim 1 further including obtaining approval to use said candidate storage volume as a mirror volume.

10. The method of claim 9 wherein said obtaining includes communicating information representative of said candidate storage volume to a recipient and receiving an approval response from said recipient.

11. The method of claim 9 wherein said obtaining includes communicating first identification information representative of said candidate storage volume to a recipient, receiving a non-approval response, and in response thereto selecting a second candidate storage volume from among said storage volumes and communicating second identification information representative of said second candidate storage volume to said recipient.

12. The method of claim 1 wherein said selecting is based on a comparison between one or more parameters of said production volume and one or more parameters of each of said storage volumes.

13. The method of claim 1 wherein said command further includes second information representative of one or more of a performance level and a reliability level, wherein said selecting is based on said second information.

14. The method of claim 1 wherein said command further includes second information representative of a site designation, wherein said selecting includes selecting from only those of said storage volumes having location information that are representative of said site designation.

15. A method for storage management comprising:

receiving a command of a first kind, said command comprising first information;

identifying at least one production volume based on said first information;

selecting a candidate storage volume from among a plurality of storage volumes;

initiating mirroring of said production volume with said candidate storage volume, wherein said candidate storage volume is a mirror volume; and

receiving a command of a second kind, said command of second kind including second information indicative of one or more storage volumes being used to perform mirroring of one or more production volumes, and in response to receiving said command of a second kind, ceasing mirroring of said one or more production volumes and designating said one or more storage volumes as being no longer in use as mirror volumes so that said one or more storage volumes can be selected as candidate volumes in a subsequent selecting step.

16. A method for managing a data storage system comprising:

storing first information relating to a plurality of storage units, said first information defining a pool of mirror volumes;

receiving second information representative of one or more production volumes;

selecting one or more candidate mirror volumes from said pool of mirror volumes, each candidate mirror volume associated with a production volume;

for each production volume, initiating a mirroring operation for said each production volume using its associated candidate mirror volume; and

for each candidate mirror volume designating it as being not available.

17. The method of claim 16 wherein said second information is a reference to an application program, said application program having associated therewith a plurality of data objects, the method further including interacting with said application program to identify production volumes which collectively provide storage for one or more of said data objects.

18. The method of claim 17 further including receiving third information representative of a first data object and identifying production volumes which collectively provide storage for all data files comprising said first data object.

19. The method of claim 16 further including obtaining approval to use said candidate mirror volume including communicating information representative of said candidate mirror volume to a recipient and receiving an approval response from said recipient.

20. The method of claim 16 further including receiving third information representative of one or more of a performance level and a reliability level, wherein said selecting is further based on said third information.

21. The method of claim 16 further including receiving third information representative of a site designation, wherein said selecting includes selecting from said pool of mirror volumes only those mirror volumes having location information that is representative of said site designation.

22. The method of claim 16 further including:

receiving third information indicative of one or more mirror volumes, each corresponding to a mirrored production volume;

ceasing mirroring of said mirrored production volumes; and

designating said one or more mirror volumes as being available so that they can be selected as candidate mirror volumes in a subsequent selecting step.

23. A data storage system comprising production volumes, mirror volumes, and a volume manager operable in accordance with the method as recited in claim 16.

24. A network area storage system having a volume manager operable in accordance with the method of claim 16.

25. In a data storage system comprising primary volumes and mirror volumes, an interface for exchanging information with said data storage system to effect management of said mirror volumes comprising:

first computer program code effective to operate a computer to receive a first command comprising first information indicative one or more primary volumes and to communicate a first request to said data storage system, said first request comprising information representative of said one or more primary volumes and absent information identifying pairings of primary volumes and mirror volumes;

second computer program code effective to operate said computer to receive second information from said data storage system, said second information identifying one or more mirror volumes;

third computer program code effective to operate said computer to obtain approval of said one or more mirror volumes; and

fourth computer program code effective to operate said computer to detect receipt of said approval and in response thereto to communicate a second request to said data storage system, said second request effective to cause said data storage system to initiate mirroring of said one or more primary volumes using said one or more mirror volumes.

26. The interface of claim 25 wherein said first command further includes additional information indicative of one or more of a performance level and a reliability level, wherein said one or more mirror volumes each has a parameter that matches said specified parameter.

27. The interface of claim 25 wherein said first command includes additional information indicative of an application program and a data object corresponding to said application program, said data object being contained on said one or more primary volumes.

28. The interface of claim 25 wherein said first computer programming code is further effective to operate said computer to receive a second command comprising information identifying one or more first storage volumes and to communicate a third request comprising information indicative of said one or more first storage volumes to said data storage system, said third request effective to cause said data storage system to add information identifying said one or more first storage volumes to an information store from which said mirror volumes are selected.

29. The interface of claim 28 wherein said first computer programming code is further effective to operate said computer to receive a third command identifying one or more second storage volumes and to communicate a fourth request comprising information indicative of said one or more second storage volumes to said data storage system, said fourth request effective to cause said data storage system to delete information identifying said one or more second storage volumes from said information store.

30. The interface of claim 25 wherein said first computer programming code is further effective to operate said computer to receive a second command and to communicate a third request to said data storage system, said third request effective to cause said data storage system to cease a mirroring operation between one or more pairs comprising a primary volume and a mirror volume.

31. The interface of claim 30 wherein said second command includes information indicative of one or more primary volumes and said third request includes said information.

32. The interface of claim 30 wherein said second command includes information indicative of one or more mirror volumes and said third request includes said information.

33. A data storage manager suitable for use in a data storage system comprising a plurality of storage volumes, the data storage manager comprising:

a data store to store information representative of one or more of said storage volumes as mirror volumes;

a first component operable to receive commands; and

a second component cooperative with said first component and in data communication with said data store, said first component operable to communicate information indicative of said commands to said second component, said second component operable to effect control of mirroring operations in said data storage system in accordance with said commands,

said second component, in response to a first command comprising information representative of one or more of said storage volumes used as primary volumes, being operable to identify said primary volumes, to select one or more candidate mirror volumes from among said one or more mirror volume, to associate each primary volume with one of said candidate mirror volumes, and to effect a mirroring operation of said each primary volume with its associated candidate volume.

34. The data storage manager of claim 33 wherein said first command further comprises information representative of an application program, said application program having at least one associated application object, said application object having an associated set of one or more primary volumes, said second component operable to obtain identification information representative of said set of one or more primary volumes.

35. The data storage manager of claim 34 further including a computing device and a third component comprising programming code effective to control said computing device, wherein said application program executes on said computing device, said third component further effective to obtain said identification information from said application program representative of said set of one or more primary volumes and to communicate said identification information to said second component.

36. The data storage manager of claim 34 further including a second data store having stored therein said identification information.

37. The data storage manager of claim 34 wherein said application program is a database application and said application object is a database comprising a plurality of data files, said set of primary volumes collectively providing storage for said data files.

38. The data storage manager of claim 34 wherein said application program is a storage volume management application and said application object is a collection of primary volumes managed by said storage volume management application, said collection of primary volumes comprising said set of primary volumes.

39. The data storage manager of claim 33 wherein said first component is a first computing device and said second component is a second computing device in communication with said first computing device, said second computing device further in communication with said data storage system.

40. The data storage manager of claim 39 wherein said data storage system includes a network area storage system.

41. The data storage manager of claim 33 further including a computing device, wherein said first component is first computer programming code effective to control said computing device and said second component is second computer programming code effective to control said computing device.

42. The data storage manager of claim 33 wherein said first command further comprises one or more selection criteria, said second component operable to select said candidate mirror volumes based on said selection criteria.

43. The data storage manager of claim 42 wherein said selection criteria include one or more of a performance level and a reliability level.

44. The data storage manager of claim 33 wherein each said mirror volume has an associated sitename information, said first command further including information representative of a sitename, said second component operable to select candidate mirror volumes based on said sitename.

45. The data storage manager of claim 33 wherein said second component, in response to a second command comprising information identifying one or more of said first storage volumes, is operable to store information representative of said first storage volumes in said data store to add one or more mirror volumes thereto.

46. The data storage manager of claim 33 wherein said second component, in response to a second command comprising information identifying one or more of said first storage volumes, is operable to delete information representative of said first storage volumes from said data store to delete one or more mirror volumes therefrom.

47. The data storage manager of claim 33 wherein said first component is operable to obtain an approval indication signifying that said candidate mirror volumes can be used to mirror said primary volumes.

48. The data storage manager of claim 33 wherein said data storage system includes a network area storage component.

49. A data storage system comprising first storage volumes used as primary volumes, second storage volumes used as mirror volumes, and a data storage manager as claimed in claim 33.

50. The data storage manager of claim 33 as used in a network area storage system.

51. A data storage manager comprising:

storage pool means for storing first information relating to a plurality of storage units, said first information defining a pool of mirror volumes;

means for receiving second information representative of one or more production volumes;

means, in data communication with said storage pool means, for selecting one or more candidate mirror volumes, each candidate mirror volume associated with a production volume; and

means for initiating a mirroring operation for each production volume using its associated candidate mirror volume.

52. The data storage manager of claim 51 as used in a data storage system.

53. The data storage manager of claim 52 wherein said data storage system includes a network area storage component.