CN104965772A - Method and device for recovering files - Google Patents

Abstract

A file restoration method, the method includes: selecting a file to be restored; restoring the file; and restoring the next file after the restoration of the file. The technical scheme of the present invention restores data in units of files, avoids the time delay caused by insufficient network bandwidth when restoring a large amount of data, and effectively improves the efficiency of data restoration.

Description

A file recovery method and device

technical field

The invention relates to the technical field of data storage, in particular to a file recovery method and device.

Background technique

In Linux file management, in addition to its own data, a file also has ancillary information, that is, file metadata. This metadata is used to record many information about the file, such as file size, owner, group it belongs to, modification date, etc. Metadata is not included in the file's data, but is maintained by the operating system. In fact, this so-called metadata is contained in the inode. The area occupied by inodes is different from the area of data blocks. Each inode is represented by a unique integer number (inode number).

In storing metadata, the inode is the key to the "file" from abstraction to concreteness. The inode storage consists of some pointers, which point to some data blocks in the storage device, and the contents of the file are stored in these data blocks. When Linux wants to open a file, it only needs to find the inode corresponding to the file, and then collect all the data blocks along the pointer to form the data of a file in memory.

When backing up data to be protected through backup software, not only the file data itself needs to be backed up, but also the metadata corresponding to the file needs to be backed up. When the data is lost, the file data and related attribute information are recovered by restoring the file metadata and the data itself.

The prior art is that when there are a lot of files to be restored, the metadata of all the files are first restored in batches, and then the data of all the files are restored in batches. As we all know, in a LAN environment, network bandwidth becomes the bottleneck of data backup and restoration; Due to the limitation of large and network bandwidth, data transmission takes a long time. Overall, the entire data recovery cycle is relatively long.

Contents of the invention

In order to solve the above problems, the present invention provides a file recovery method, the method comprising:

Select the files to be restored;

restore said file;

After the files are restored, the next file is restored.

Optionally,

The restoring the file includes: restoring metadata of the file; restoring data of the file.

Optionally, before restoring the data of the file, the method includes: finding the data of the file corresponding to the metadata of the file.

A file recovery device, said device comprising:

The file management module is used to select the files to be restored;

a restore module; for restoring said files;

After the files are restored, the next file is restored.

Optionally, the restoring module is configured to restore metadata of the file; restore data of the file.

Optionally, a search module is also included; used to find the data of the file corresponding to the metadata of the file according to the metadata of the file before the recovery module restores the data of the file.

The technical scheme of the present invention restores data in units of files, avoids the time delay caused by insufficient network bandwidth when restoring a large amount of data, and effectively improves the efficiency of data restoration.

Description of drawings

Fig. 1 is the flowchart of a kind of file restoration method of the present invention;

Fig. 2 is a structural diagram of a file recovery device of the present invention.

Detailed ways

The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

It should be noted that, if there is no conflict, the embodiments of the present invention and various features in the embodiments can be combined with each other, and all are within the protection scope of the present invention. In addition, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

A file recovery method, said method comprising:

Select the files to be restored;

restore said file;

After the files are restored, the next file is restored.

Optionally,

The restoring the file includes: restoring metadata of the file; restoring data of the file.

Optionally, before restoring the data of the file, the method includes: finding the data of the file corresponding to the metadata of the file.

Fig. 1 is the flowchart of a kind of file restoration method of the present invention;

Step S01: Select the file to be restored;

Step S02: restoring the file;

Step S03: After the file is restored, the next file is restored.

The technical solution of the present invention fully considers the network bandwidth, and restores a single file as a unit, instead of using the prior art method of restoring metadata of a large number of files in batches, and then restoring data of a large number of files in batches, thereby avoiding network Delay caused by insufficient bandwidth.

Restore with a single file as a unit, for example, restore the first file first, restore the metadata of the first file first; use the search algorithm to find the corresponding data, restore the metadata, and then restore the corresponding data, the first File recovery is complete. Then restore the second file in the same way. Restore all files in turn.

The technical scheme of the present invention can show advantages when the files are in large batches. Saves bandwidth and improves time.

Split it into individual files for recovery, restore the metadata of a file, then restore the data of this file, and then restore the next file until all files are restored. For the network, the maximum amount of data per pass is only the data amount of a single file.

Utilizes network bandwidth. Thus, the transmission efficiency is improved.

The technical solution of the present invention fully considers the factors of network bandwidth, recovers with a single file as a unit, and solves the problem of prolonging data recovery time due to insufficient network bandwidth in the prior art.

Fig. 2 is a structural diagram of a file recovery device of the present invention;

Including file management module 201, recovery module 202, search module 203;

The search module 203 is used to find the data corresponding to the metadata; the recovery module 202 is used to recover the metadata and data;

For a single file, the search module finds the corresponding data according to the metadata; after finding it, the recovery module is notified, and the recovery module recovers the found data;

The above search process can be performed before, at the same time, or after the restoration module restores the metadata;

For example, at the same time,

When the recovery module 202 recovers the metadata, notify the search module 203 to search;

The search module 203 searches for the corresponding data, and then notifies the recovery module 202;

The file management module 201 is used to manage the file group, including sorting the files in the file group, and selecting each file to be restored; when a file is restored, the restoration module 202 notifies the file management module that the file restoration is completed; The file management module 201 notifies the restoration module 202 to restore the next file.

Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk, and the like. Optionally, all or part of the steps in the foregoing embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any specific combination of hardware and software.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should all belong to the protection scope of the claims of the present invention.

Claims (6)

1. a file access pattern method, is characterized in that, described method comprises:

Choose the file that will recover;

Recover described file;

Described file access pattern is complete, then recovers next file.

2., as profit requires the method as described in 1, it is characterized in that

The described file of described recovery, comprising: the metadata recovering described file; Recover the data of described file.

3. method as claimed in claim 2, is characterized in that, before the data of the described file of described recovery, comprising: the data finding file corresponding to the metadata of described file.

4. a file restoring device, is characterized in that, described device comprises:

Document management module, for choosing the file that will recover;

Recover module; For recovering described file;

Described file access pattern is complete, then recovers next file.

5. device as claimed in claim 4, is characterized in that, described recovery module, for recovering the metadata of described file; Recover the data of described file.

6. device as claimed in claim 5, is characterized in that, also comprise and search module; For before the data recovering file described in module recovery, according to the metadata of described file, find the data of file corresponding to the metadata of described file.