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Snapshot restore method and apparatus

A technique for snapshotting, restoring operations, applied in instrumentation, error detection/correction, computing, etc., to solve problems such as impossible to revert to another version, multiplication, expensive data storage volumes, etc.

Inactive Publication Date: 2010-12-08
DOT HILL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, maintaining different versions of data storage volumes is expensive and inefficient because of the requirement to maintain a complete copy of each storage volume version
The problem is multiplied if multiple backup versions of the storage volume are maintained
Furthermore, once a different version of a storage volume is restored, it is generally not possible to revert to another version, for example, if it is determined that the restored storage volume is less desirable than the previously applied storage volume
In addition, the storage volume selected in connection with the recovery operation is usually not immediately available, and the ability to create additional versions of the storage volume may not be possible when the rollback to the selected storage volume is complete.

Method used

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  • Snapshot restore method and apparatus
  • Snapshot restore method and apparatus

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Embodiment Construction

[0021] figure 1 is a block diagram of electronic data system 100 depicting a consolidated data storage system 104 in accordance with an embodiment of the present invention. Generally, data storage system 104 may be interconnected to one or more host processors or computers 108 by a bus and / or network 112 . Accordingly, embodiments of the present invention have application associated with single or multiple hosts 108 in a storage area network (SAN), or direct-attach environment. According to other embodiments, data storage system 104 may be integrated with host 108 or connected directly to host 108 . Additionally, storage system 104 may be interconnected to management computer 116 . In general, management computer 116 may provide a user interface for controlling operational aspects of storage system 104 . Management computer 116 may be interconnected with storage system 104 directly and / or via bus or network 112 . According to other embodiments of the invention, management ...

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Abstract

Methods and apparatuses for providing a data storage system having snapshot restore capabilities are provided. In particular, snapshots may be taken to represent a state of a storage volume at different times. The state of the storage volume may be returned to the state represented by any snapshot even while the storage volume continues to accept read and write operations. Furthermore, these features are provided in the context of a sparse snapshot structure, according to which multiple copies of individual data chunks are not maintained by the data storage system.

Description

technical field [0001] The present invention is directed to data storage system controllers. In particular, the present invention is directed to methods and apparatus for restoring data in a data storage system. Background technique [0002] The need to store digital files, documents, pictures, images and other data continues to rapidly increase. With regard to electronic storage of data, various data storage systems have been designed for storing large amounts of data quickly and securely. Such systems may include one or more storage devices used in a cooperative manner. A system is also available where data can be distributed across multiple storage devices so that if one (or, in some cases, more than one) of the storage devices fails, the data is not irretrievably lost. A system that operates multiple individual storage devices in concert may also provide improved data access and / or storage times. Examples of systems that can provide such advantages can be found in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/00
CPCG06F11/1469G06F2201/84
Inventor 恩戈克兰·T·武詹姆斯·G·韦达
Owner DOT HILL SYST
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