Data recovery operations, such as recovery from modified network data management protocol data

Patent metadata

Field	Value
Publication number	US-2016147472-A1
Application number	US-201615005209-A
Country	US
Kind code	A1
Filing date	Jan 25, 2016
Priority date	Sep 30, 2010
Publication date	May 26, 2016
Grant date	—

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.

First claim

I/We claim:

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.

Assignees

• Commvault Systems Inc

Inventors

• Littlefield Duncan Alden
• Nallathambi Vimal Kumar
• Chanchlani Girish

Classifications

• G06F11/1469 Primary

  Backup restoration techniques · CPC title

• G06F3/0665

  at area level, e.g. provisioning of virtual or logical volumes · CPC title

• G06F3/067

  Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS] · CPC title

• G06F3/0641

  De-duplication techniques · CPC title

• G06F3/0619 Primary

  in relation to data integrity, e.g. data losses, bit errors · CPC title