DATA RECOVERY OPERATIONS, SUCH AS RECOVERY FROM MODIFIED NETWORK DATA MANAGEMENT PROTOCOL DATA

• US 20160147472A1
• Filed: 01/25/2016
• Published: 05/26/2016
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Littlefield, Duncan Alden, Nallathambi, Vimal Kumar, Chanchlani, Girish
• Granted Patent: US 9,557,929 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1448 Management of the data involved in backup or backup restore
• CPC Class Codes: G06F 11/1453 using de-duplication of the data
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• 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 3/0641 De-duplication techniques
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

The systems and methods herein permit storage systems to correctly perform data recovery, such as direct access recovery, of Network Data Management Protocol (“NDMP”) backup data that was modified prior to being stored in secondary storage media, such as tape. For example, as described in greater detail herein, the systems and methods may permit NDMP backup data to be encrypted, compressed, deduplicated, and/or otherwise modified prior to storage. The systems and methods herein also permit a user to perform a precautionary snapshot of the current state of data (e.g., primary data) prior to reverting data to a previous state using point-in-time data.

Claims

1. A tangible computer-readable storage medium whose contents cause a data storage system to perform an operation for recovering Network Data Management Protocol (“

NDMP”

) backup data, the operation comprising;

receiving a request for an unmodified version of NDMP data that was modified prior to being stored in secondary storage media, the request including a logical offset and a logical length; and

,

returning the requested unmodified version of NDMP data using the received logical offset and logical length.

2. The computer-readable storage medium of claim 1, wherein the NDMP data that was modified prior to being stored in secondary storage media was modified by one or more of:

deduplication, encryption, and compression.

3. The computer-readable storage medium of claim 1,

wherein returning the requested unmodified version of NDMP data using the received logical offset and logical length comprises accessing an index using the received logical offset and logical length to identify from the index a physical offset and physical length associated with a physical data storage device, and

wherein the physical offset and physical length permit addressing and accessing a stored chunk of data that represents a modified form of a portion of the requested NDMP data.

4. A data storage system for reverting data to a previous state using point-in-time data, the system comprising:

means for receiving a request from a user to revert data to an earlier state at a previous time using previously obtained point-in-time data;

means for presenting the user with an option to take a snapshot of a current state of the data;

means for determining whether the user has requested that a snapshot of the current state of the data be taken;

means for taking a snapshot of the current state of the data, when the user has requested that a snapshot of the current state of the data be taken; and

,

means for reverting the data using the previously obtained point-in-time data.

5. The system of claim 4, wherein the means for presenting the user with the option to take a snapshot of the current state of the data includes means for presenting a displayable dialog box that provides the user with:

an option to take a snapshot of the current state of the data, and,

an option to always take a precautionary snapshot before reverting data.

6. A tangible computer-readable storage medium whose contents cause a data storage system to perform an operation for reverting a set of data, the operation comprising:

performing a precautionary snapshot of a current state of a set of data, and,

reverting the set of data to a previous state using point-in-time data, wherein the precautionary snapshot is performed prior to reverting the set of data.

7. The tangible computer-readable storage medium of claim 6, wherein the operation further comprises:

receiving a user'"'"'s request to revert the set of data to a previous state using the point-in-time data;

in response to the request, automatically providing a user interface display that presents the user with the option to perform the precautionary snapshot, and,

receiving the user'"'"'s selection of the option to perform the precautionary snapshot via the user interface display.