Use of temporary secondary copies in failover operations

• US 9,483,363 B2
• Filed: 05/07/2014
• Issued: 11/01/2016
• Est. Priority Date: 05/08/2013
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Gokhale, Parag, Kottomtharayil, Rajiv, Karandikar, Amey Vijaykumar, Vijayan, Manoj Kumar
• Primary Examiner(s): Patel, Kamini
• Application Number:
  US14/272,315
• Publication Number:
  US 20140337664A1
• Time in Patent Office: 909 Days
• Field of Search: 714/4.11
• US Class Current: 1/1
• CPC Class Codes: G06F 11/006 Identification G06F11/2289 takes precedence
• CPC Class Codes: G06F 11/1458 Management of the backup or restore process
• CPC Class Codes: G06F 11/1461 Backup scheduling policy
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1662 the resynchronized component or unit being a persistent storage device re-synchronization of failed mirror storage G06F11/2082; rebuild or reconstruction of parity RAID storage G06F11/1008
• CPC Class Codes: G06F 11/2092 Techniques of failing over between control units
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

According to certain aspects, an information management cell can include a failover storage manager configured to: instruct a secondary copy application to perform a secondary copy operation in which primary data generated by at least one client computing device is stored as a secondary copy in a second secondary copy file format different than a first secondary copy file format; and subsequent to reestablishment of connectivity to a main storage manager, restore the secondary copy stored in the second secondary copy file format to obtain restored data that is no longer in the second secondary copy file format; and can include at least one secondary storage computing device configured to, subsequent to the restore of the secondary copy, and at the direction of the main storage manager, conduct the restored data to a secondary storage device(s) to create a secondary copy in the first secondary copy file format.

Claims

1. An information management system configured to perform data protection operations in the event of lost connectivity with a storage manager, the system comprising:

at least one client computing device residing in an information management cell and comprising one or more applications installed thereon configured to generate primary data for storage in one or more primary storage devices in the information management system, the client computing device further configured to execute first secondary copy software installed thereon to process primary data generated by the one or more applications as part of a first secondary copy operation in which the primary data is, at the direction of a first storage manager that is geographically remote from an information management cell in which the at least one client computing system resides, copied to one or more secondary storage devices for storage as a first secondary copy in a first secondary copy file format; and

a second storage manager installed on a computing device within the information management cell and configured to;

activate in response to loss of connectivity between the information management cell and the first storage manager;

instruct second secondary copy software installed on a computing device within the information management cell to perform a second secondary copy operation in which the primary data generated by the applications installed on the at least one client computing device is stored as a second secondary copy in a second secondary copy file format different than the first secondary copy file format;

detect a reestablishment of connectivity to the first storage manager; and

subsequent to reestablishment of connectivity to the first storage manager, initiate a restore of the second secondary copy stored in the second secondary copy file format to obtain restored data;

wherein one or more computing devices in the information management cell are configured to copy the restored data to the one or more secondary storage devices for storage as a third secondary copy in the first secondary copy file format.

2. The system of claim 1, wherein the second storage manager executes on at least one secondary storage computing device.

3. The system of claim 1, wherein the at least first secondary copy software comprises at least one data agent which converts the primary data into the first secondary copy file format.

4. The system of claim 1, wherein the second secondary copy software is installed on the at least one client computing device prior to activation of the second storage manager.

5. The system of claim 1, wherein the second secondary copy stored in the second secondary copy file format is stored in the one or more secondary storage devices.

6. The system of claim 1, wherein the second secondary copy stored in the second secondary copy file format is stored in the one or more primary storage devices.

7. The system of claim 1, wherein the second secondary copy stored in the second secondary copy file format is a point-in-time image of the primary data generated by the at least one client computing device.

8. The system of claim 1, wherein the at least one client computing device comprises a plurality of client computing devices, wherein instances of the second secondary copy software are installed on multiple ones of the plurality of client computing devices.

9. The system of claim 1, wherein the second storage manager has limited functionality in comparison to the first storage manager.

10. A method of performing data protection operations in the event of lost connectivity with a storage manager, the method comprising:

detecting loss of connectivity between a first storage manager and an information management cell, wherein the information management cell comprises;

at least one client computing device comprising one or more applications installed thereon configured to generate primary data for storage in one or more primary storage devices in the information management system, the client computing device further configured to execute first secondary copy software installed thereon to process primary data generated by the one or more applications as part of a first secondary copy operation in which the primary data is, at the direction of a first storage manager that is geographically remote from the information management cell copied to one or more secondary storage devices for storage as a first secondary copy in a first secondary copy file format; and

in response to detecting the loss of connectivity between the information management cell and the first storage manager, activating a second storage manager executing on a computing device within the information management cell;

instructing, by the second storage manager, second secondary copy software installed on a computing device within the information management cell to perform a second secondary copy operation in which primary data generated by the client computing device is stored as a second secondary copy in a second secondary copy file format different than the first secondary copy file format;

detecting a reestablishment of connectivity to the first storage manager; and

subsequent to reestablishment of connectivity to the first storage manager, initiating a restore, by the second storage manager, of the second secondary copy stored in the second secondary copy file format to obtain restored data; and

copying the restored data to the one or more secondary storage devices for storage as a third secondary copy in the first secondary copy file format.

11. The method of claim 10, wherein the second storage manager executes on at least one secondary storage computing device.

12. The method of claim 10, wherein the second secondary copy software is installed on the at least one client computing device.

13. The method of claim 10, wherein the first secondary copy software comprises at least one data agent which converts the primary data into the first secondary copy file format.

14. The method of claim 10, wherein the at least one client computing device comprises a plurality of client computing devices, wherein instances of the second secondary copy software are installed on multiple ones of the plurality of client computing devices.