WO2022036927A1

WO2022036927A1 - File storage method and apparatus, device, and medium

Info

Publication number: WO2022036927A1
Application number: PCT/CN2020/133445
Authority: WO
Inventors: 董遇生
Original assignee: 安徽鸿程光电有限公司
Priority date: 2020-08-19
Filing date: 2020-12-02
Publication date: 2022-02-24
Also published as: CN111984597B; CN111984597A

Abstract

A file storage method and apparatus, a device, and a medium. The method comprises: in response to a storage request for a target file, acquiring information of modification to an original file, wherein the target file is a file obtained by modifying the original file, and a storage file of the original file comprises at least one data file and target index data corresponding to the at least one data file (310); determining newly-written data on the basis of the modification information, wherein the newly-written data at least comprises updated target index data (320); and replacing the target index data with the newly-written data, so as to obtain a storage file of the target file (330). The method can improve the storage efficiency of a target file.

Description

File storage method, apparatus, device and medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese Patent Application No. 202010836266.5 filed on Aug. 19, 2020, entitled "File Storage Method, Apparatus, Device and Medium", the entire content of which is incorporated herein by reference.

technical field

The present application relates to the field of data processing, and in particular, to a file storage method, apparatus, device and medium.

Background technique

At present, when a user finishes making a multimedia file (eg, courseware) and saves it, the data and various resources of the multimedia file are generally packaged into a compressed file and stored on a disk. For example, when the multimedia file is courseware, if the user modifies part of the courseware and needs to save it again, the latest data file and various resources need to be repackaged to generate a new compressed file. When the courseware contains a lot of resources, the compressed file generated is also very large, and it takes a long time to save the modified file each time.

When users modify courseware, they generally only modify a small part of the content in the courseware, but when saving the modified courseware, all the file contents are re-saved, resulting in low file storage efficiency.

SUMMARY OF THE INVENTION

The present application provides a file storage method, device, device and computer storage medium, which can solve the problem of low file storage efficiency.

In a first aspect, the present application provides a file storage method, which may include:

In response to the storage request for the target file, the modification information of the original file is obtained, wherein the target file is a modified file of the original file, and the storage file of the original file may include at least one data file and the target index corresponding to the at least one data file data;

Determine the newly written data based on the modification information, and the newly written data may at least include the updated target index data;

Replace the target index data with the newly written data to obtain the storage file of the target file.

In a second aspect, the present application provides a file storage device, the device may include:

The modification information obtaining module is used to obtain modification information of the original file in response to the storage request for the target file, wherein the target file is a modified file of the original file, and the storage file of the original file may include at least one data file and at least one data file. The target index data corresponding to a data file;

a newly written data determination module, configured to determine newly written data based on the modification information, and the newly written data may at least include updated target index data;

The storage module is used to replace the target index data with newly written data to obtain the storage file of the target file.

In a third aspect, the present application provides a file storage device, the device may include: a processor and a memory storing computer program instructions;

When the processor executes the computer program instructions, the file storage method provided in the first aspect can be implemented.

In a fourth aspect, the present application provides a computer storage medium, where computer program instructions are stored thereon, and when the computer program instructions are executed by a processor, the file storage method provided in the first aspect can be implemented.

In the file storage method, device, device and computer storage medium provided by the present application, when the modified target file is saved, newly written data can be determined based on the modification information of the original file. The newly written data may at least include updated target index data. When storing the target file, it is only necessary to replace the target index data in the storage file of the original file with the newly written data, so that the target file can be stored, that is, the target file is saved in an incremental manner, reducing the need for The amount of data to be re-saved improves the storage efficiency of modified files.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present application. For those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.

Fig. 1 is the structural representation of the courseware provided according to the application;

Fig. 2 is the structural representation of the storage file of the original courseware provided according to the application;

3 is a schematic flowchart of an embodiment of a file storage method provided according to the present application;

4 is a schematic structural diagram of an embodiment of a storage file of a target file provided according to the present application;

5 is a schematic structural diagram of another embodiment of a storage file of a target file provided according to the present application;

6 is a schematic structural diagram of an embodiment of a file storage device provided according to the present application;

FIG. 7 is a schematic structural diagram of an embodiment of a file storage device provided according to the present application.

detailed description

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application, and are not configured to limit the present application. It will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating examples of the present application.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprises" does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element.

The multimedia file may be a PPT (PowerPoint) file. PPT software is a presentation graphics software, mainly used for making slides. The software is capable of creating vivid visual effects and supports multimedia functions. For example, in a conference room scenario, the speaker of the conference can use the conference file made by the PPT software to present the lecture content to the participants. In the teaching scenario, teachers can use the courseware made by PPT software to teach. For example, the courseware can be course software produced according to the requirements of the teaching syllabus, through the determination of teaching objectives, the analysis of teaching content and tasks, the structure of teaching activities and the design of interface.

The following takes courseware as an example to introduce the storage format of multimedia files such as PPT. FIG. 1 is a schematic structural diagram of the courseware provided by this application. As shown in Figure 1, the courseware generally consists of three types of data files: "main data file, page data file, and resource data file". The data formats of the main data file and the page data file are, for example, Extensible Markup Language (Extensible Markup Language, XML) format. For example, the master data file may include the overall style data of the courseware, the total number of pages, and so on. For example, the page data file may include page layout data and text data of the current page and other data. The resource data file may include pictures, audio, video and other files in the courseware page.

Among them, for a courseware, there is only one master data file. The page data file corresponds to a page of a courseware, that is, the number of page data files corresponds to the number of pages of the courseware. The number of resource data files is related to the number of pictures, audio, video and other resources used by each page in the courseware. When the courseware needs to be saved as disk files, these data files need to be packaged into a compressed package file to form the final courseware file, that is, the storage file of the courseware on the disk.

Courseware files generally use ZIP format. The ZIP file format is a file format for data compression and document storage. As shown in Figure 2, a ZIP file is mainly composed of three parts, the file data storage area, the central directory structure area and the central directory end area.

The file data storage area is used to save the general information and file content of each data file in the courseware. Referring to Fig. 2, the file data storage area includes n data files: data file 1, data file 2, ..., data file n. n is a positive integer.

The central directory structure area is used to save the index data of each data file in the courseware. The index data of each data file may include the summary information of the data file, the offset address of the data file relative to the first address in the ZIP file, and the file length of the data file and other information.

The central directory end area is used to save the index data of the index data of each data file in the central directory structure area. For example, the central directory end area is used to save the number of index data in the central directory structure area (ie the number of central directories n), and the offset address of the index data of each data file relative to the first address in the ZIP file (ie the central directory number n) directory offset) and the total length of the data in the central target structure area (ie, the central directory length). Most of the data of the ZIP file is located in the "file data storage area", and only a small part of the data is located in the "central directory structure area" and "central directory end area".

However, when the user modifies part of the content of the courseware and needs to save it again, the latest data files and various resources need to be repackaged to generate new compressed files. When the courseware contains many data files and resources, the generated compressed files are also large, and it takes a long time to save the modified files each time, resulting in low file storage efficiency.

Based on this, the present application provides a file storage method, which can improve the storage efficiency of modified files. The file storage method provided by the present application will be described in detail below with reference to specific embodiments and accompanying drawings.

FIG. 3 is a schematic flowchart of an embodiment of a file storage method provided by the present application. As shown in Figure 3, the file storage method 300 provided by the present application may include:

Step 310, in response to the storage request for the target file, obtain the modification information of the original file, wherein, the target file is the modified file of the original file, and the storage file of the original file may include at least one data file corresponding to at least one data file. the target index data;

Step 320, determining newly written data based on the modification information, and the newly written data may at least include updated target index data;

Step 330: Replace the target index data with newly written data to obtain a storage file of the target file.

The specific implementation of each step in steps 310 to 330 will be introduced in detail below.

First, the specific implementation of step 310 is introduced.

In the embodiment of the present application, the original file may be a PPT file. The PPT file may include, for example, courseware, conference files, and other files. During use of the original file, modifications to the original file may be required. The target file is the modified file from the original file.

The following takes the original file as the original courseware as an example to introduce several situations of modifying the original file:

Case 1: Modify the content of the existing page in the original courseware.

In the embodiment of the present application, modifying the content of the existing pages in the original courseware may include: adding new data to the existing pages in the original courseware, deleting existing data in the existing pages in the original courseware, modifying the existing pages in the original courseware There are page data and so on. Among them, modifying the data of the existing page in the original courseware can be converted into deleting the existing data in the page and adding new data to the page.

Therefore, the modification to the content of the existing page in the original courseware can be expressed as the deletion of the original page data file of the existing page and the addition of the new page data file of the modified existing page.

That is to say, in the scenario of Case 1, the modification information to the original file may include the identifiers of the new page data file of the newly added modified existing page and the original page data file of the deleted existing page.

Case 2: Add a new page to the original courseware.

In the embodiment of the present application, adding a new page to the original courseware can be represented as adding a page data file of the new page and adding a resource data file corresponding to the new page. It should be noted that if a new page is added to the original courseware, the master data file will also be updated (the record of this page is added). Therefore, adding new pages to the original courseware also manifests as deletion of the original master data file of the original courseware and addition of the updated master data file.

That is to say, in the scenario of case 2, the modification information to the original file may include the page data file of the newly added new page, the resource data file corresponding to the newly added new page, and the original master data of the deleted original courseware The identification of the file and the new updated master data file.

Case 3: Delete the page in the original courseware.

In the embodiment of the present application, deleting a page in the original courseware may be expressed as deleting the original page data file of the page and the original resource data file corresponding to the page. It should be noted that if the page in the original courseware is deleted, the master data file will also be updated (delete the record of the page). Therefore, the deletion of the pages in the original courseware also manifests as deletion of the original master data file of the original courseware and addition of the updated master data file.

That is to say, in the scenario of Scenario 3, the modification information to the original file may include the identifier of the original page data file of the deleted page, the identifier of the original resource data file corresponding to the deleted page, and the original master data of the deleted original courseware The identification of the file and the new updated master data file.

In the embodiment of this application, the modification of the original courseware, for example, is to add, delete or modify elements in the page in the courseware, or to add or delete pages, these modification operations are finally reflected as changes to the main data file, The addition, deletion or modification of three types of data files: page data files and resource data files. These three types of data files are the storage granularity when courseware is saved to disk. The modification of data files can be converted into deletion of existing data files and addition of new data files. Therefore, modifications to the original file may include deletion of existing data files in the original file and addition of new data files. In this way, the modification information to the original file may include identifiers of newly added data files and deleted data files.

If the user wants to save the modified original file, that is, the user wants to save the target file, the user can send a storage request for the target file through the device where the original file is located. In response to the storage request for the target file, the device where the original file is located may obtain the acquisition time of the storage request. By acquiring the acquisition time of the storage request and the preservation time of the original file, all operation records of the original file between the acquisition time of the storage request and the preservation time of the original file can be obtained. According to all operation records of the original file, it can be counted which data files have changed after the original file has been modified. By comparing the list of data files before and after the modification of the original file, the identifiers of the newly added data file and the deleted data file can be obtained, and then the modification information of the original file can be obtained.

In the embodiment of the present application, the storage file of the original file may be the final file corresponding to when the original file is stored to the disk. Referring to Fig. 2, the storage file of the original file may include at least one data file and target index data corresponding to the at least one data file. Wherein, at least one data file may include a main data file, a page data file and a resource data file in the original file. The target index data corresponding to at least one data file may include first index data and second index data. The first index data may include index data of each data file in the at least one data file stored in the central target structure area shown in FIG. 2 . The second index data may include index data of the first index data, that is, data in the end area of the central directory shown in FIG. 2 .

The specific implementation manner of step 320 is described below.

In the embodiment of the present application, the modification information to the original file may include an identifier of a newly added data file and/or a deleted data file. Regardless of whether the modification information includes an identifier of a newly added data file or an identifier of a deleted data file, the target index data needs to be updated based on the modification information of the original file. Therefore, the newly written data may include at least the updated target index data. The updated target index data is, for example, updated based on the modification information of the original file.

To save the target file to disk, the newly added data file needs to be saved. However, in order to improve the storage efficiency of target files, deleted data files do not necessarily need to be actually deleted. In the embodiment of the present application, the target index data may be updated based on the identifier of the data file to be deleted, and the updated target index data may be used as newly written data, and the storage of the target file may also be implemented.

Therefore, in some embodiments of the present application, step 320 may include step 3201 and step 3202 .

Step 3201, in the case that the modification information includes the newly added data file, obtain the updated target index data based on the modification information, and determine the newly added data file and the updated target index data as newly written data;

Step 3202, in the case that the modification information includes the identifier of the deleted data file, obtain the updated target index data based on the modification information, and determine the updated target index data as newly written data.

In the embodiment of the present application, if the modification information to the original file includes a newly added data file, the newly added data file needs to be written after the file data storage area. If the newly added data file is written after the file data storage area, the index data of the newly added data file needs to be added to the first index data in the central directory structure area. Since new index data is added to the first index data in the central directory structure area, the second index data in the central directory end area also needs to be updated accordingly, that is, the target index data needs to be updated based on the newly added data file. Therefore, the newly written data includes newly added data files and updated target index data.

However, if the modification information of the original file includes the identifier of the deleted data file, in order to save the storage time of the target file, it is not necessary to delete the data file corresponding to the identifier in the file data storage area, and only the target index data can be updated. For example, the index data of the data files to be deleted may be removed from the first index data of the central directory structure area. Since part of the index data is deleted from the first index data in the central directory structure area, the second index data in the central directory end area also needs to be updated accordingly. That is to say, the target index data needs to be updated based on the identifier of the deleted data file, so as to realize the deletion of the index data of the data file to be deleted, that is, mark deletion.

The following describes the updated target index data obtained based on the modification information of the original file. In the embodiment of the present application, the target index data may include first index data and second index data, the first index data may include index data of each data file in the at least one data file, and the second index data may include the first index data Index data for index data.

Wherein, in step 3201 and step 3202, based on the modified data file, obtaining the updated target index data may include steps A to C. Step A, update the first index data based on the modification information, and obtain the updated first index data; Step B, update the second index data according to the updated first index data, and obtain the updated second index data; Step C , and determine the updated first index data and the updated second index data as the updated target index data.

In step A, if the modified data file includes the newly added data file, the index data of the newly added data file is added to the first index data to obtain the updated first index data.

In step A, when the modified data file includes the identifier of the deleted data file, the index data of the deleted data file corresponding to the identifier is deleted from the first index data to obtain the updated first index data.

In step A, in the case that the modified data file includes a newly added data file and a deleted data file, the index data of the newly added data file is added from the first index data and the identifier is deleted from the first index data The index data of the corresponding deleted data file is obtained to obtain the updated first index data.

Since the second index data stored in the central directory end area includes the index data of the first index data in the central directory structure area, for example, the central directory end area is used to store the number of index data in the central directory structure area, and each data The index data of the file is relative to the offset address of the first address in the ZIP file and the total data length of the index data in the central directory structure area. Therefore, in step B, if the index data of the data file appears in the first index data. addition or deletion, the second index data needs to be updated along with the update of the first index data.

For example, if the updated first index data includes the index data of the newly added data file, the number of index data in the central directory structure area increases accordingly, and the index data of each data file is relative to the first address in the ZIP file. The offset address of , then moves backward, and the total data length of the first index data increases accordingly, thereby obtaining the updated second index data.

In step C, after both the first index data and the second index data are updated, the updated first index data and the updated second index data are determined as the updated target index data.

In some embodiments of the present application, step 330 includes: under the condition of keeping at least one data file unchanged, replacing the target index data with newly written data to obtain a storage file of the target file.

In the embodiment of the present application, the modification of the original file is actually the deletion and addition of the data file. For the newly added data file, it can be appended after the file content of the storage file of the original file. The deleted data files can be processed by deleting the index data of the data files to be deleted, so that the existing data files in the storage files of the original files can be reused, and only the deleted data files and newly added data files can be processed. data files. When users modify courseware, they usually only modify a small part of the content, and most of the content remains unchanged, so the changed data is much less than the unchanged data. Therefore, using the file storage method provided by this application can significantly improve the preservation of files. speed.

The following describes a schematic diagram of a storage file of a target file in the case that the modification information to the original file includes a newly added data file with reference to the accompanying drawings. FIG. 4 is a schematic diagram of a storage file of a target file provided by the present application. As shown in FIG. 4 , within the dot-dash line frame is at least one data file included in the storage file of the original file. Inside the dashed box is the newly written data. Wherein, if the modification information to the original file includes a newly added data file, at least one data file in the storage files in the original file is kept unchanged, and then newly written data is added at the end of the file data storage area. Wherein, the newly written data may include three parts: the newly added data file in the file data storage area, the updated first index data in the new central directory structure area, and the updated first index data in the new central directory end area The second index data.

As shown in FIG. 4 , the modification information to the original file may include the newly added data file n+1. The updated first index data may include the first index data in the target index data and the index data of the newly added data file n+1. That is to say, a new "central directory structure area" is formed after adding the index data of the newly added data file n+1 to the original "central directory structure area" in the storage file of the original file. And, based on the updated first index data, the number of central directories is updated to n+1, and the central directory offset and the central directory length are updated to obtain updated second index data. That is, on the basis of the original "central directory end area" in the storage file of the original file, the number of central directories, the central directory offset and the central directory length are updated to obtain a new "central directory end area".

It is assumed that what is shown in FIG. 2 is a schematic diagram of the storage file of the original file. Compared with the storage file of the original file in FIG. 4, the storage file of the target file shown in FIG. 4, the data files 1 to n in the dotted line frame remain unchanged, and then the file data of the storage file of the original file is stored in the original file. After the storage area, the newly written data in the dotted box in FIG. 4 is added.

Compared with the original storage file in FIG. 2 , the storage file of the target file in FIG. 4 has newly added data file n+1 shown in the gray area, and the index data of the data file n+1. The storage file of the target file in FIG. 4 is compared with the original storage file in FIG. 2, and the central directory offset, the central directory length and the central directory number shown in the gray area are modified.

In the following, a schematic diagram of the storage file of the target file in the case where the modification information to the original file includes the identifier of the deleted data file will be described with reference to the accompanying drawings. FIG. 5 is a schematic diagram of a storage file of a target file provided by the present application. As shown in FIG. 5 , within the dot-dash line frame is at least one data file included in the storage file of the original file. Inside the dashed box is the newly written data. Wherein, when the modification information to the original file includes the identifier of the deleted data file, keep at least one data file in the storage file in the original file unchanged, and then append the newly written data at the end of the file data storage area. . The newly written data may include two parts: the updated first index data in the new central directory structure area and the updated second index data in the new central directory end area.

As shown in FIG. 5 , the modification information to the original file may include the identifier of the deleted data file 2 . The updated first index data may include data after the index data of the data file 2 is deleted from the first index data in the target index data. That is to say, a new "central directory structure area" is formed after deleting the index data of the data file 2 on the basis of the original "central directory structure area" in the storage file of the original file. And, based on the updated first index data, the number of central directories is updated to n-1, and the central directory offset and the central directory length are updated to obtain updated second index data. That is, on the basis of the original "central directory end area" in the storage file of the original file, the number of central directories, the central directory offset and the central directory length are updated to obtain a new "central directory end area".

Compared with the storage file of the original file in Fig. 5, the storage file of the target file shown in Fig. 5, the data file 1 to the data file n in the dotted line frame remain unchanged, and then the file data of the storage file of the original file After the storage area, the newly written data in the dotted box in FIG. 5 is added.

Compared with the original storage file in FIG. 2 , the storage file of the target file in FIG. 5 has the index data of the data file 2 deleted. The storage file of the target file in FIG. 5 is compared with the original storage file in FIG. 2, and the central directory offset, the central directory length and the central directory number shown in the gray area are modified.

In the embodiment of the present application, after the modification information on the original file is acquired, a list of data files to be deleted and a list of data files to be added can be acquired. For the list of data files to be deleted, it is only necessary to delete the index data of these files from the "Central Directory Structure Area" and correct the data in the "Central Directory End Area", and then use the new "Central Directory Structure Area" and "Central Directory Structure Area" The directory end area "overwrites the original "central directory structure area" and the "central directory end area", and the content of the original "file data storage area" remains unchanged.

For the list of data files to be added, it is necessary to append the newly added data files to the end of the original "file data storage area", and append the index data of the newly added data files to the "central directory structure area" (the new " The file data storage area" has become larger, and the original "file data storage area" data remains unchanged), and the data of the "central directory end area" is revised, and the new "central directory structure area" and "central directory end area" Append to the end of the new "file datastore".

In the embodiment of the present application, most of the data of the courseware is stored in the "file data storage area", and the deletion and addition of data files directly reuse the existing "file data storage area", only the modification Very little data is stored, so the operation is fast.

The file storage method proposed in the present application uses an incremental method to save the target file on the basis of the storage file of the original file, and directly modifies the storage file of the original file on the disk instead of generating a copy of the file on the disk for operation, so it can obviously Improve the storage speed of target files, and save too much disk space during the save process.

In the embodiment of the present application, in order to further reduce the size of the storage file of the target file, so as to reduce the disk space occupied when saving the target file to the disk, in the case where the modification information includes the identifier of the deleted data file, the step 330 includes: in the case of determining that the ratio of the size of the deleted data file corresponding to the identification to the size of the storage file of the original file is greater than the first preset ratio, deleting the deleted data file corresponding to the identification from at least one data file , and replace the target index data with the newly written data to obtain the storage file of the target file.

As an example, the first preset ratio may be 10%.

That is to say, if a lot of data files are deleted when the original file is modified, then if the target file is still saved by mark deletion, the data files that need to be deleted in the "file data storage area" are not actually deleted. Therefore, in order to further reduce the size of the storage file of the target file and reduce the space occupied when the target file is saved to the disk, the ratio of the size of the deleted data file to the size of the storage file of the original file is greater than the first preset In the case of the ratio, the data files to be deleted are deleted from at least one data file, that is, the data in the storage file of the original file is actually deleted, so as to reduce the size of the courseware file.

In some embodiments of the present application, in order to prevent the storage file of the original file from being damaged, before step 310, the file storage method provided by the present application may further include: saving the target index data in the memory; and/or storing the target index data in the memory; Index data is kept on disk.

When the user chooses to cancel saving during the saving of the target file, or when the computer is suddenly powered off during the saving of the target file and the saving of the target file is interrupted, the storage file of the original file will be damaged. Therefore, in order to prevent the storage file of the original file from being damaged, the target index data can be backed up.

In some embodiments of the present application, when saving the target file to the disk, only the "central directory structure area" and "central directory end area" of the storage file of the original file need to be modified, and the "file data storage area" does not need to be modified. Area". Therefore, before modifying the original file, if the original "central directory structure area" and "central directory end area" are backed up, that is, the target index data is backed up. When the above two situations occur, only the storage file of the original file needs to be Rewrite the original "central directory structure area" and "central directory end area" data in the original file, that is, you only need to rewrite the target index data into the storage file of the original file to restore the original file to the state before modification. Avoid file corruption situations.

Before modifying the original file, the original "central directory structure area" and "central directory end area" in the storage file of the original file can be backed up by at least one of the following two methods, that is, the target index data is backed up. The first backs up the target index data in memory. The second backs up the target index data on disk. When the target index data is stored in the disk, it can be backed up in the directory where the original file storage file is located, and the backup file name can be "original file storage file name.tmp". If saving of the target file is normally completed, the backup file of the target index data is deleted.

If the user cancels saving the target file, the storage file of the original file can be located at the starting position of the original "central directory structure area", and the data of the original "central directory structure area" and "central directory end area" of the backup can be written , you can restore the stored files of the original files. In this case, the memory backup is used, and the file recovery speed is fast.

For the case where the saving of the target file is interrupted due to abnormal power failure, when the user opens the original file again, the computer determines whether the directory where the original file is stored has a file name such as "Stored file name of the original file.tmp" backup file. If there is a backup file whose file name is, for example, "storage file name of the original file. tmp", the backup file is read into the memory. Then, locate the storage file of the original file to the starting position of the original "central directory structure area", and write the backup data of the original "central directory structure area" and "central directory end area" to restore the storage file of the original file , in this case, the memory backup is used, and the file recovery speed is fast. After the restoration of the storage file of the original file is completed, the backup file of the target index data is deleted, and the restored original file is opened.

FIG. 6 is a schematic structural diagram of an embodiment of a file storage device provided by the present application. As shown in FIG. 6, the file storage device 600 provided by the present application may include:

The modification information obtaining module 610 is configured to obtain modification information of the original file in response to the storage request for the target file, wherein the target file is a modified file of the original file, and the storage file of the original file may include at least one data file and Target index data corresponding to at least one data file;

a new write data determination module 620, configured to determine new write data based on the modification information, and the new write data may at least include updated target index data;

The storage module 630 is configured to replace the target index data with newly written data to obtain a storage file of the target file.

In the embodiment of the present application, when the modified target file is saved, the newly written data can be determined based on the modification information of the original file. The newly written data may at least include updated target index data. When storing the target file, it is only necessary to replace the target index data in the storage file of the original file with the newly written data, so that the target file can be stored, that is, the target file is saved in an incremental manner, reducing the need for The amount of data to be re-saved improves the storage efficiency of modified files.

In some embodiments of the present application, the modification information may include newly added data files and/or deleted data files; wherein, the newly written data determination module 620 is used for:

In the case where the modification information includes a newly added data file, based on the modification information, the updated target index data is obtained, and the newly added data file and the updated target index data are determined as newly written data;

When the modification information includes the identifier of the deleted data file, based on the modification information, the updated target index data is obtained, and the updated target index data is determined as newly written data.

In some embodiments of the present application, the target index data may include first index data and second index data, the first index data may include index data of each data file in the at least one data file, and the second index data may include the first index data. Index data of index data; wherein, the newly written data determination module 620 is used for:

Update the first index data based on the modification information to obtain the updated first index data;

According to the updated first index data, update the second index data to obtain the updated second index data;

The updated first index data and the updated second index data are determined as the updated target index data.

In some embodiments of the present application, the newly written data determination module 620 is used to:

In the case that the modification information includes a newly added data file, the index data of the newly added data file is added to the first index data to obtain the updated first index data;

In the case where the modification information includes the identifier of the deleted data file, the index data corresponding to the identifier of the deleted data file is deleted from the first index data to obtain the updated first index data.

In some embodiments of the present application, the storage module 630 is used to:

Under the condition of keeping at least one data file unchanged, replace the target index data with newly written data to obtain a storage file of the target file.

In some embodiments of the present application, the modification information may include the identification of the deleted data file;

Wherein, the storage module 630 is used for:

In the case where it is determined that the ratio of the size of the deleted data file corresponding to the identification to the size of the storage file of the original file is greater than the first preset ratio, delete the deleted data file corresponding to the identification from at least one data file, and set the target index The data is replaced with the newly written data, and the storage file of the target file is obtained.

In some embodiments of the present application, the file storage device 600 may further include a saving module for:

Save the target index data in memory;

and / or,

Save the target index data to disk.

Other details of the file storage device according to the embodiment of the present application are similar to the file storage method according to the embodiment of the present application described above with reference to FIG. 3 to FIG. 6 , and details are not repeated here.

The file storage method and apparatus according to the embodiments of the present application described in conjunction with FIG. 3 to FIG. 6 may be implemented by a file storage device. FIG. 7 is a schematic structural diagram of an embodiment of a file storage device provided according to the present application.

The file storage device 700 may include a processor 701 and a memory 702 storing computer program instructions.

Specifically, the above-mentioned processor 701 may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

Memory 702 may include mass storage for data or instructions. By way of example and not limitation, memory 702 may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive or two or more A combination of more than one of the above. Memory 702 may include removable or non-removable (or fixed) media, where appropriate. Memory 702 may be internal or external to file storage device 700, where appropriate. In certain embodiments, memory 702 is non-volatile solid state memory.

In certain embodiments, memory 702 may include read only memory (ROM). Where appropriate, the ROM may be a mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of the above.

Memory may include read only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical/tangible memory storage devices. Thus, typically, a memory includes one or more tangible (non-transitory) computer-readable storage media (eg, memory devices) encoded with software including computer-executable instructions, and when the software is executed (eg, by a or multiple processors), it is operable to perform the operations described with reference to the method of file storage according to the present application.

The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement any one of the file storage methods in the foregoing embodiments.

In one example, the file storage device may also include a communication interface 703 and a bus 710 . Among them, as shown in FIG. 7 , the processor 701 , the memory 702 , and the communication interface 703 are connected through the bus 710 and complete the mutual communication.

The communication interface 703 is mainly used to implement communication between modules, apparatuses, units and/or devices in the embodiments of the present application.

The bus 710 may include hardware, software, or both, coupling the components of the file storage device to each other. By way of example and not limitation, the bus may include Accelerated Graphics Port (AGP) or other graphics bus, Enhanced Industry Standard Architecture (EISA) bus, Front Side Bus (FSB), HyperTransport (HT) Interconnect, Industry Standard Architecture (ISA) Bus, Infiniband Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Microchannel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of the above. Bus 710 may include one or more buses, where appropriate. Although embodiments of this application describe and illustrate a particular bus, this application contemplates any suitable bus or interconnect.

In addition, in combination with the file storage method in the foregoing embodiment, the embodiment of the present application may provide a computer storage medium for implementation. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by the processor, any one of the file storage methods in the foregoing embodiments is implemented. Examples of computer storage media include non-transitory computer storage media such as electronic circuits, semiconductor memory devices, ROM, random access memory, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks.

To be clear, the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above-described embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the sequence of steps after comprehending the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, elements of the present application are programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted over a transmission medium or communication link by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like. The code segments may be downloaded via a computer network such as the Internet, an intranet, or the like.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps may be performed in the order mentioned in the embodiment, or may be different from the order in the embodiment, or several steps may be performed simultaneously.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine such that execution of the instructions via the processor of the computer or other programmable data processing apparatus enables the Implementation of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. Such processors may be, but are not limited to, general purpose processors, special purpose processors, application specific processors, or field programmable logic circuits. It will also be understood that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can also be implemented by special purpose hardware for performing the specified functions or actions, or by special purpose hardware and/or A combination of computer instructions is implemented.

The above are only specific implementations of the present application. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, modules and units may refer to the foregoing method embodiments. The corresponding process in , will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should all cover within the scope of protection of this application.

Claims

A file storage method, comprising:

In response to the storage request for the target file, the modification information of the original file is obtained, wherein the target file is a modified file of the original file, and the storage file of the original file includes at least one data file and the at least one data file. The target index data corresponding to a data file;

Determine new write data based on the modification information, and the new write data includes at least updated target index data;

Replace the target index data with the newly written data to obtain a storage file of the target file.
The method according to claim 1, wherein the modification information includes newly added data files and/or deleted data files;

Wherein, determining the newly written data based on the modification information includes:

In the case where the modification information includes a newly added data file, the updated target index data is obtained based on the modification information, and the newly added data file and the updated target index data are determined as the Describe the newly written data;

When the modification information includes the identifier of the deleted data file, the updated target index data is obtained based on the modification information, and the updated target index data is determined as the newly written data.
The method of claim 2, wherein the target index data includes first index data and second index data, the first index data includes index data of each data file in the at least one data file, and the The second index data includes index data of the first index data;

Wherein, obtaining the updated target index data based on the modification information includes:

Update the first index data based on the modification information to obtain the updated first index data;

According to the updated first index data, update the second index data to obtain updated second index data;

The updated first index data and the updated second index data are determined as the updated target index data.
The method according to claim 3, wherein the updating the first index data based on the modification information to obtain the updated first index data comprises:

In the case that the modification information includes a newly added data file, the index data of the newly added data file is added to the first index data to obtain the updated first index data;

In the case where the modification information includes the identifier of the deleted data file, the index data of the deleted data file corresponding to the identifier is deleted from the first index data, and the updated first index data is obtained.
The method according to claim 1, wherein the replacing the target index data with the newly written data to obtain the storage file of the target file comprises:

Under the condition that the at least one data file is kept unchanged, the target index data is replaced with the newly written data to obtain a storage file of the target file.
The method of claim 1, wherein the modification information includes an identification of the deleted data file;

Wherein, replacing the target index data with the newly written data to obtain the storage file of the target file includes:

In the case where it is determined that the ratio of the size of the deleted data file corresponding to the identifier to the size of the storage file of the original file is greater than a first preset ratio, delete the deletion corresponding to the identifier from the at least one data file and replace the target index data with the newly written data to obtain the storage file of the target file.
The method according to claim 1, wherein, before acquiring the modification information on the original file in response to the storage request for the target file, the method further comprises:

storing the target index data in memory; and/or

The target index data is saved in the disk.
A file storage device, comprising:

A modification information acquisition module, configured to acquire modification information of an original file in response to a storage request for a target file, wherein the target file is a modified file of the original file, and the storage file of the original file includes at least one data files and target index data corresponding to the at least one data file;

a new write data determination module, configured to determine new write data based on the modification information, and the new write data includes at least updated target index data;

A storage module, configured to replace the target index data with the newly written data to obtain a storage file of the target file.
The apparatus according to claim 8, wherein the modification information includes newly added data files and/or deleted data files;

Wherein, the new write data determination module is configured to:

In the case where the modification information includes a newly added data file, the updated target index data is obtained based on the modification information, and the newly added data file and the updated target index data are determined as the Describe the newly written data;

When the modification information includes the identifier of the deleted data file, the updated target index data is obtained based on the modification information, and the updated target index data is determined as the newly written data.
The apparatus of claim 9, wherein the target index data includes first index data and second index data, the first index data includes index data of each data file in the at least one data file, and the The second index data includes index data of the first index data;

Wherein, the new write data determination module is configured to:

Update the first index data based on the modification information to obtain the updated first index data;

According to the updated first index data, update the second index data to obtain updated second index data;

The updated first index data and the updated second index data are determined as the updated target index data.
The apparatus of claim 10, wherein the new write data determination module is configured to:

In the case that the modification information includes a newly added data file, the index data of the newly added data file is added to the first index data to obtain the updated first index data;

In the case where the modification information includes the identifier of the deleted data file, the index data of the deleted data file corresponding to the identifier is deleted from the first index data, and the updated first index data is obtained.
The apparatus of claim 8, wherein the storage module is configured to:

Under the condition that the at least one data file is kept unchanged, the target index data is replaced with the newly written data to obtain a storage file of the target file.
The apparatus of claim 8, wherein the modification information includes an identification of the deleted data file;

Wherein, the storage module is configured to:

In the case where it is determined that the ratio of the size of the deleted data file corresponding to the identifier to the size of the storage file of the original file is greater than a first preset ratio, delete the deletion corresponding to the identifier from the at least one data file and replace the target index data with the newly written data to obtain the storage file of the target file.
A file storage device, comprising: a processor and a memory storing computer program instructions,

When the processor executes the computer program instructions, the file storage method according to any one of claims 1-7 is implemented.
A computer storage medium, where computer program instructions are stored thereon, and when the computer program instructions are executed by a processor, the file storage method according to any one of claims 1-7 is implemented.