WO2018006587A1 - 一种文件存储方法、终端及存储介质 - Google Patents
一种文件存储方法、终端及存储介质 Download PDFInfo
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- WO2018006587A1 WO2018006587A1 PCT/CN2017/071392 CN2017071392W WO2018006587A1 WO 2018006587 A1 WO2018006587 A1 WO 2018006587A1 CN 2017071392 W CN2017071392 W CN 2017071392W WO 2018006587 A1 WO2018006587 A1 WO 2018006587A1
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
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- the present invention relates to the field of computer technologies, and in particular, to a file storage method, a terminal, and a storage medium.
- an embodiment of the present invention is to provide a file storage method, a terminal, and a storage medium, which can fully and effectively utilize a storage space, thereby avoiding waste of storage space, thereby storing and/or backing up more. Important documents.
- a file storage method comprising:
- the file to be stored is stored.
- the release space occupied by the released storage file with the lowest level of importance according to the first space and the stored space includes:
- the remaining space is a space other than the stored space in a total space of the storage device
- the file list information is used to identify an important level of the stored source file, and the file list information includes an access frequency and a creation time of the source file corresponding to the stored backup file, according to the File list information, releasing the free space occupied by the stored backup file with the lowest level of importance includes:
- the stored backup file with the lowest level of importance is determined according to the number of accesses of the source file corresponding to all the stored backup files and the creation time of the source file corresponding to all the stored backup files.
- the stored backup files corresponding to the first m source files in the source file sequence are marked as the m stored backup files with the lowest level of importance, and the space occupied by the m stored backup files with the lowest level of importance is greater than or equal to a difference between the first space and the remaining space, where m is a positive integer smaller than a total number of the stored backup files.
- the method further includes: before releasing the release space occupied by the stored backup file with the lowest level of importance according to the first space and the stored space, the method further includes:
- the stored backup file with the lowest level of importance is forcibly released according to the second space and the total space.
- a terminal in a second aspect, includes:
- the obtaining module is configured to obtain the file information of the file to be stored and the stored space occupied by the stored file, where the file information includes a first space occupied by the file to be stored, and the stored file includes the stored source file and the Store backup files;
- a release module configured to release a release space occupied by the stored backup file with the lowest level of importance according to the first space and the stored space;
- a storage module configured to store the file to be stored.
- the release module includes:
- a determining unit configured to determine whether the first space is greater than a remaining space; the remaining space is a space other than the stored space in a total space of the storage device;
- Obtaining a unit configured to acquire file list information of the stored file when the first space is greater than the remaining space
- a release unit configured to release the release space occupied by the stored backup file with the lowest level of importance according to the file list information.
- the file list information is used to identify an important level of the stored source file.
- the file list information includes the access frequency and the creation time of the source file corresponding to the stored backup file, and the release unit includes:
- Obtaining a subunit configured to obtain access frequency and creation time of source files corresponding to all stored backup files
- Determining a sub-unit configured to determine the stored backup file with the lowest level of importance according to the number of accesses of the source file corresponding to all the stored backup files and the creation time of the source file corresponding to all the stored backup files ;
- the release subunit is configured to release the free space occupied by the stored backup file with the lowest level of importance.
- the determining subunit is specifically configured as:
- the stored backup files corresponding to the first m source files in the source file sequence are marked as the m stored backup files with the lowest level of importance, and the space occupied by the m stored backup files with the lowest level of importance is greater than or equal to a difference between the first space and the remaining space, where m is a positive integer smaller than a total number of the stored backup files.
- the terminal further includes:
- a detecting module configured to periodically detect a second space occupied by the stored source file
- the release module is further configured to forcibly release the stored backup file with the lowest level of importance according to the second space and the total space.
- a computer storage medium having stored therein computer executable instructions for executing the file storage method described above.
- the embodiment of the invention provides a file storage method, a terminal, and a storage medium.
- the file information of the file to be stored and the stored space occupied by the stored file are obtained, and the file information includes The first space occupied by the file to be stored, the stored file includes the stored source file and the stored backup file; after that, according to the first space and the remaining space, the release space occupied by the storage file with the lowest level of importance is released, and the remaining space is occupied. It is a space other than the already stored space in the total space of the storage device; finally, in the free space and the remaining space, the file to be stored is stored.
- the stored backup file with the lowest level of importance can be released according to the file information of the file to be stored and the stored space of the stored file, thereby storing the file to be stored, thereby realizing efficient and dynamic recovery of the storage space. Efficient use of storage space, thus avoiding the waste of storage space, and ultimately storing and/or backing up more important files.
- FIG. 1 is a flowchart of a file storage method according to an embodiment of the present invention
- FIG. 3 is a flowchart of releasing a occupied space according to an embodiment of the present invention.
- FIG. 4 is a flowchart of another release occupied space according to an embodiment of the present invention.
- FIG. 5 is a flowchart of another file storage method according to an embodiment of the present invention.
- FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
- FIG. 7 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure.
- FIG. 8 is a schematic structural diagram of still another terminal according to an embodiment of the present disclosure.
- FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
- a file backup method provided by an embodiment of the present invention is applied to a terminal, and the terminal includes a mobile phone, a notebook computer, a tablet computer, an LCD TV, a game machine, and even an on-board computer machine, such as As shown in Figure 1, the method includes:
- Step 101 Obtain file information of a file to be stored and a stored space occupied by the stored file.
- the file information includes a first space occupied by the file to be stored, and the stored file includes the stored source file and the stored backup file.
- the stored source file refers to the source file that has been stored in the storage device.
- the stored backup file refers to the secondary storage of the important stored source file in the storage device to form a backup file of the important stored source file.
- a source file is a file that can launch the corresponding software and implement the corresponding function.
- a backup file is equivalent to copying the corresponding source file.
- the user can access the stored source file through the terminal.
- the terminal system finds that the stored source file to be accessed cannot be read or is damaged, and the terminal system accesses the stored source.
- the stored backup file corresponding to the file is used to implement the access.
- the terminal system also uses the stored backup file to repair the stored source files that cannot be read or damaged, so that the user can access later.
- the execution process of the terminal application layer includes:
- Step 1011 Read the stored source file.
- the application layer of the terminal system reads the stored source files through the read interface of the system.
- Step 1012 It is determined whether the stored source file is successfully read. If yes, step 1015 is performed; otherwise, step 1013 is performed.
- Step 1013 Read the corresponding stored backup file.
- the terminal system finds that the stored source file cannot be successfully read, it reads the stored backup file corresponding to the stored source file. Specifically, the stored source file and the stored backup file are read from a flash memory.
- Step 1014 Repair the corresponding stored source file according to the stored backup file.
- the stored backup file can be read not only by the terminal system but also by the corresponding stored source.
- the file is fixed for later reading.
- the repaired source file can be repaired by using the stored backup file, or the repair can be completed in the idle state of the system.
- Step 1015 Update the access frequency of the stored source file.
- the storage device also stores information about the stored source files, such as the access frequency. Each time the stored source file is read once, the access frequency is incremented by one.
- the source file and the backup file are stored in the same storage device, that is, stored in the storage space.
- the source file is visible to the user; the backup file may be invisible to the user and only visible to the background of the terminal system.
- the file to be stored includes the source file to be stored and the backup file to be stored, and there are two cases here:
- Case 1 The file to be stored is the source file to be stored.
- the file to be stored is the source file to be stored. Indicates that the storage device has not stored the source file to be stored before, and is now preparing to store the source file to be stored in the storage device.
- Case 2 The file to be stored is the backup file to be stored.
- the stored source file is already stored in the storage device, and then the stored source file is backed up immediately or under predetermined conditions, that is, the file to be stored is a backup file to be stored.
- the terminal system finds an important stored source file, and the backup file corresponding to the storage file is not found in the storage space, then the terminal system will back up the important stored source file.
- the storage file is the backup file.
- Step 102 Release the release space occupied by the stored backup file with the lowest level of importance according to the first space and the stored space.
- the free space occupied by the lowest stored backup file includes:
- Step 1021 Determine whether the first space is greater than the remaining space; if yes, execute step 1022; otherwise, perform step 1024.
- the remaining space is a space other than the already stored space in the total space of the storage device.
- Step 1022 Obtain file list information of the stored file.
- Step 1023 Release the release space occupied by the stored backup file with the lowest level of importance according to the file list information.
- Step 1024 directly storing the file to be stored.
- the remaining space of the storage device is sufficient to store the file to be stored, and the file to be stored is directly stored in the storage device;
- the terminal system can sense the situation in time, and takes a series of measures to store the file to be stored in the storage device. Specifically, the terminal system deletes the stored backup file with the lowest level of importance in the storage device, and releases the free space occupied by the stored backup file with the lowest level of importance, thereby storing the file to be stored. In this way, in a sense, more important and meaningful files are stored in the storage device to better serve the user.
- the storage device Before releasing the free space occupied by the storage file with the lowest level of importance, you need to identify the storage file with the lowest level of importance from the stored file, and the importance level of the stored backup file depends on the storage source corresponding to it. Files, the more important the source files are stored, the higher the level of importance of the corresponding stored backup files. It is worth noting that the storage device also stores file list information related to files, which is the basis for judging the importance of the stored source files.
- the determination of the importance of the stored source file is a process with strong subjective factors, which can also be freely defined by the user, which varies from person to person and may be closely related to the user's personal occupation, hobbies, habits, etc., this embodiment Not limited.
- the access frequency of the stored source file and the creation time of the stored source file are used as a basis for determination.
- the file list information is used to identify the importance level of the stored source file, and the file list information includes the access frequency and creation time of the source file corresponding to the stored backup file. Specifically, the access frequency and creation time of the source files corresponding to all the stored backup files are obtained; the number of accesses of the source files corresponding to all the stored backup files and the creation time of the source files corresponding to all the stored backup files are Determine the storage file with the lowest level of importance; release the free space occupied by the storage file with the lowest level of importance.
- the stored files include the stored source file and the stored backup file, wherein the total number of stored source files is greater than or equal to the total number of stored backup files.
- the source files corresponding to all the stored backup files are arranged in order of increasing the number of accesses of the source files corresponding to all the stored backup files and the creation time of the source files corresponding to all the stored backup files, thereby forming a source file.
- the stored backup file corresponding to the first m source files in the source file sequence is marked as the m stored backup files with the lowest level of importance, and the space occupied by the m stored backup files with the lowest level of importance is greater than or equal to the first
- the difference between space and remaining space, m is a positive integer less than the total number of stored backup files.
- the space occupied by the m stored backup files with the lowest level of importance When the space occupied by the m stored backup files with the lowest level of importance is released, the space occupied by the m stored backup files with the lowest level of importance and the original remaining space together constitute a new remaining space. At this time, the new The remaining space must be greater than or equal to the first space.
- the space occupied by the m stored backup files having the lowest importance level is an absolute value greater than or equal to the difference between the first space and the remaining space, so that the storage space can store the file to be stored.
- the new one is still smaller than the first space, that is, the space occupied by the m-1 stored backup files with the lowest importance level is smaller than the absolute value of the difference between the first space and the remaining space, and the storage device cannot store the waiting Store files.
- Step 103 Store a file to be stored.
- the method further includes: periodically detecting a second space occupied by the stored source file; and forcibly releasing the stored backup file with the lowest level of importance according to the second space and the total space.
- the terminal forcibly releases the stored backup files with the lowest level of importance according to the second space and the total space, including:
- Step 1021' acquiring the second space and the total space.
- Step 1022' calculates a ratio of the second space to the total space.
- Step 1023' determining whether the ratio is greater than a preset threshold; if yes, performing step 1024'; otherwise performing step 1021'.
- the preset threshold is taken as 50%.
- Step 1024' obtaining the stored backup file with the lowest level of importance.
- the number of stored backup files with the lowest level of importance obtained is preset by the user, and may be any natural number between 1 and the total number of stored backup files.
- Step 1025' releasing the stored backup file with the lowest level of importance.
- the stored backup file having the lowest importance level in the step 1024' is specifically referred to.
- step 103 the method further includes updating the file list information in the storage device in time.
- the stored backup file with the lowest level of importance is released, and the file to be stored is stored, thereby realizing
- the storage space is dynamically and efficiently reclaimed, and the storage space can be fully and effectively utilized, thereby avoiding waste of storage space and finally storing and/or backing up more important files.
- the embodiment of the present invention provides a file backup method, which is applied to a terminal, and assumes that the user U creates an important system file on the terminal T as an example.
- the source file of the important system file is recorded as D
- the backup file of this important system file is recorded as D'.
- the method includes:
- Step 201 T receives a request for U to create D.
- U will issue a request to create a D to T; then, T will receive a request for U to create D. These actions can be done through the click operation of U and the internal operation of T.
- Step 202 The application layer of T calls the system write interface.
- the file is stored through the system write interface, that is, the file is stored in the storage device of T.
- T calls the system write interface through the application layer to implement a write operation.
- the application layer is the seventh layer of the Open Systems Interconnection Reference (OSI), and the application layer is an application that communicates with other computers, and is a communication service corresponding to the application.
- OSI Open Systems Interconnection Reference
- the OSI model defines the standards for different computer interconnections and is the basic framework for designing and describing computer network communication.
- Step 203 T calculates the space occupied by D.
- Step 204 T acquires a remaining space of the storage device.
- T will automatically get the remaining space of its own storage device. Specifically, the total space of the storage device is first obtained; then, the storage space occupied by the stored file is obtained; finally, the storage space is subtracted from the total space, and the obtained difference is the remaining space of the storage device, which is worthy of description.
- the stored files include not only the stored source files, but also the stored backup files. That is, the stored space includes the occupied source file footprint and the stored backup file footprint.
- Step 205 T determines whether the space required for D is greater than the remaining space of the storage device. If yes, step 206 is performed; otherwise, step 207 is performed.
- Step 206 T releases the release space occupied by the stored backup file with the lowest level of importance in the storage device.
- the remaining space of the storage device indicating T is not enough to store D.
- the storage space recovery mechanism is automatically started. Specifically, T performs the operation of releasing the free space occupied by the storage file with the lowest level of importance in the storage device, that is, deleting the storage with the lowest importance level. The file is backed up, resulting in more free space than before the release, ultimately enabling D to be stored in the T's storage device. It is worth noting that the method of deleting the stored backup file with the lowest level of importance may be to delete one each time until the new remaining space can store D. The number of deletions per time can also be specified by the user.
- Step 207 T creates D in the storage device.
- the file list information of the D is formed in the storage device of the T.
- the file list information includes information for identifying the importance degree of the D; on the other hand, the file list information further includes index information for the D. So that U needs to access D, T can quickly find D through the index information.
- Step 208 T stores D' in the storage device.
- D is an important system file, after creating D, it is necessary to store its corresponding backup file D'.
- the storage D' may be performed immediately after the D is created, or the storage D' may be arranged in the idle state of the system by the file system of the T. This embodiment does not limit the process. .
- the stored backup file with the lowest level of importance can be released according to the file information of the file to be stored and the stored space of the stored file, thereby storing the file to be stored, thereby realizing efficient and dynamic recovery of the storage space. Efficient use of storage space, thus avoiding the waste of storage space, and ultimately storing and/or backing up more important files.
- a terminal 30 is provided in the embodiment of the present invention. As shown in FIG. 6, the terminal 30 includes:
- the obtaining module 301 is configured to obtain the file information of the file to be stored and the stored space occupied by the stored file, where the file information includes a first space occupied by the file to be stored, and the stored file includes the stored source file and the stored backup file;
- the release module 302 is configured to release a release space occupied by the stored backup file with the lowest level of importance according to the first space and the stored space;
- the storage module 303 is configured to store a file to be stored.
- the stored backup file with the lowest level of importance can be released according to the file information of the file to be stored and the stored space of the stored file, thereby storing the file to be stored, thereby realizing efficient and dynamic recovery of the storage space. Efficient use of storage space, thus avoiding the waste of storage space, and ultimately storing and/or backing up more important files.
- the release module 302 includes:
- the determining unit 3021 is configured to determine whether the first space is greater than the remaining space; the remaining space is a space in the total space of the storage device other than the stored space;
- the obtaining unit 3022 is configured to obtain file list information of the stored file when the first space is greater than the remaining space.
- the releasing unit 3023 is configured to release the release space occupied by the stored backup file with the lowest level of importance according to the file list information.
- the file list information is used to identify an important level of the stored source file, and the file list information includes an access frequency and a creation time of the source file corresponding to the stored backup file, as shown in FIG. 8 .
- the release unit 3023 includes:
- the obtaining sub-unit 30231 is configured to obtain an access frequency and a creation time of the source file corresponding to all the stored backup files;
- the determining subunit 30232 is configured to determine the stored backup file with the lowest level of importance according to the number of accesses of the source files corresponding to all the stored backup files and the creation time of the source files corresponding to all the stored backup files;
- the release sub-unit 30233 is configured to release the free space occupied by the stored backup file with the lowest level of importance.
- the determining subunit 30232 is specifically configured as:
- the source files corresponding to all the stored backup files are arranged in the order of increasing the number of accesses of the source files corresponding to all the stored backup files and the creation time of the source files corresponding to all the stored backup files, to form a source file sequence;
- the stored backup files corresponding to the first m source files in the source file sequence are marked as the m stored backup files with the lowest level of importance.
- the m storage backup files with the lowest level of importance occupy the space larger than or equal to the first space and The difference between the remaining spaces, m is a positive integer less than the total number of stored backup files.
- the terminal 30 further includes:
- the detecting module 304 is configured to periodically detect the second space occupied by the stored source file
- the release module 303 is further configured to force release of the stored backup file with the lowest level of importance according to the second space and the total space.
- the obtaining module 301, the releasing module 302, the storage module 303, the detecting module 304, the determining unit 3021, the obtaining unit 3022, the releasing unit 3023, the obtaining subunit 30231, the determining subunit 30232, and the releasing subunit 30233 are both It can be a Central Processing Unit (CPU), a Micro Processor Unit (MPU), a Digital Signal Processor (DSP), or a field programmable gate located in the terminal 30.
- CPU Central Processing Unit
- MPU Micro Processor Unit
- DSP Digital Signal Processor
- FPGA Field Programmable Gate Array
- the storage module 303 in the terminal provided by the embodiment of the present invention may be implemented by using a memory on the terminal, and the obtaining module 301, the releasing module 302, the detecting module 304, the determining unit 3021, the obtaining unit 3022, the releasing unit 3023, and the obtaining subunit 30231, Both the determining sub-unit 30232 and the releasing sub-unit 30233 can be implemented by a processor on the terminal, and of course, can also be implemented by a specific logic circuit; in practical applications, the processor can be a central processing unit (CPU), a microprocessor ( MPU), digital signal processor (DSP) or field programmable gate array (FPGA).
- CPU central processing unit
- MPU microprocessor
- DSP digital signal processor
- FPGA field programmable gate array
- the file storage method is implemented in the form of a software function module and sold or used as a stand-alone product, it may also be stored in a computer readable storage medium.
- the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
- a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
- program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
- the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used to execute the foregoing file storage method in the embodiment of the present invention.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
- the present invention is directed to a method, apparatus (system), and computer program in accordance with an embodiment of the present invention
- the flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
- These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
一种文件存储方法、终端及计算机存储介质，该文件存储方法包括：获取待存储文件的文件信息和已存储文件占用的已存储空间（101），所述文件信息包括所述待存储文件占用的第一空间，所述已存储文件包括已存储源文件和已存储备份文件；根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间（102）；存储所述待存储文件（103）。
Description
本发明涉及计算机技术领域，尤其涉及一种文件存储方法、终端及存储介质。
在一些大容量的存储设备中，经常会出现存储的某个文件由于一些未知原因而导致该文件的数据无法读出或者数据损坏。当这些文件是系统文件或者是保存着用户重要资料的文件时，便会对终端系统的运行造成极大地威胁，同时还会对用户造成无法弥补的损失。
因此，文件的安全性引起了广泛关注，对文件的备份显得越来越重要。在现有技术中，会在存储设备中重新开辟一片特定的存储空间，用来存储备份文件，以备不时之需。这样，就需要开辟额外的存储空间，而额外的存储空间势必会占有原存储设备的存储空间，若存储的备份文件的信息过大，会造成存储空间极大地浪费。
发明内容
为解决上述技术问题，本发明实施例期望提供一种文件存储方法、终端及存储介质，能够充分、有效地利用存储空间，从而避免了存储空间的浪费现象，进而存储和/或备份更多的重要文件。
本发明的技术方案是这样实现的：
第一方面，提供一种文件存储方法，所述方法包括：
获取待存储文件的文件信息和已存储文件占用的已存储空间，所述文件信息包括所述待存储文件占用的第一空间，所述已存储文件包括已存储
源文件和已存储备份文件；
根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间；
存储所述待存储文件。
上述方案中，所述根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间包括：
判断所述第一空间是否大于剩余空间；所述剩余空间为存储设备的总空间中除了所述已存储空间之外的空间；
所述第一空间大于所述剩余空间时，获取已存储文件的文件列表信息；
根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间。
上述方案中，所述文件列表信息用于标识所述已存储源文件的重要级别，所述文件列表信息包括所述已存储备份文件对应的源文件的访问频次和创建时间，所述根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间包括：
获取所有已存储备份文件所对应的源文件的访问频次和创建时间；
根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件；
释放所述重要级别最低的已存储备份文件所占用的释放空间。
上述方案中，所述根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件包括：
按所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所述所有已
存储备份文件所对应的源文件，形成源文件序列；
将所述源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，所述重要级别最低的m个已存储备份文件所占的空间大于或等于所述第一空间和所述剩余空间之差，所述m为小于所述已存储备份文件总个数的正整数。
上述方案中，所述根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间之前，所述方法还包括：
周期性检测所述已存储源文件占用的第二空间；
根据所述第二空间和所述总空间，强制释放所述重要级别最低的已存储备份文件。
第二方面，提供一种终端，所述终端包括：
获取模块，配置为获取待存储文件的文件信息和已存储文件占用的已存储空间，所述文件信息包括所述待存储文件占用的第一空间，所述已存储文件包括已存储源文件和已存储备份文件；
释放模块，配置为根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间；
存储模块，配置为存储所述待存储文件。
上述方案中，所述释放模块包括：
判断单元，配置为判断所述第一空间是否大于剩余空间；所述剩余空间为存储设备的总空间中除了所述已存储空间之外的空间；
获取单元，配置为所述第一空间大于所述剩余空间时，获取已存储文件的文件列表信息；
释放单元，配置为根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间。
上述方案中，所述文件列表信息用于标识所述已存储源文件的重要级
别，所述文件列表信息包括所述已存储备份文件对应的源文件的访问频次和创建时间，所述释放单元包括：
获取子单元，配置为获取所有已存储备份文件所对应的源文件的访问频次和创建时间；
确定子单元，配置为根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件；
释放子单元，配置为释放所述重要级别最低的已存储备份文件所占用的释放空间。
上述方案中，所述确定子单元具体配置为：
按所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所述所有已存储备份文件所对应的源文件，形成源文件序列；
将所述源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，所述重要级别最低的m个已存储备份文件所占的空间大于或等于所述第一空间和所述剩余空间之差，所述m为小于所述已存储备份文件总个数的正整数。
上述方案中，所述终端还包括：
检测模块，配置为周期性检测所述已存储源文件占用的第二空间；
所述释放模块还配置为根据所述第二空间和所述总空间，强制释放所述重要级别最低的已存储备份文件。
第二方面，提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行上述的文件存储方法。
本发明实施例提供了一种文件存储方法、终端及存储介质，首先，获取待存储文件的文件信息和已存储文件占用的已存储空间，文件信息包括
待存储文件占用的第一空间，已存储文件包括已存储源文件和已存储备份文件；之后，根据第一空间和剩余空间，释放重要级别最低的已存储备份文件所占用的释放空间，剩余空间为存储设备的总空间中除了已存储空间之外的空间；最后，在释放空间和剩余空间中，存储待存储文件。这样一来，便可根据待存储文件的文件信息和已存储文件的已存储空间，释放重要级别最低的已存储备份文件，进而存储待存储文件，实现了存储空间高效地动态回收，能够充分、有效地利用存储空间，从而避免了存储空间的浪费现象，最终存储和/或备份更多的重要文件。
图1为本发明实施例提供的一种文件存储方法流程图；
图2为本发明实施例提供的一种文件访问流程图；
图3为本发明实施例提供的一种释放占用空间的流程图；
图4为本发明实施例提供的另一种释放占用空间的流程图；
图5为本发明实施例提供的另一种文件存储方法流程图；
图6为本发明实施例提供的一种终端结构示意图；
图7为本发明实施例提供的另一种终端结构示意图；
图8为本发明实施例提供的再一种终端结构示意图；
图9为本发明实施例提供的其他一种终端结构示意图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
实施例一
本发明实施例提供的一种文件备份方法，应用于终端，该终端包括手机、笔记本电脑、平板电脑、液晶电视、游戏机甚至包括车载电脑机，如
图1所示，该方法包括：
步骤101、获取待存储文件的文件信息和已存储文件占用的已存储空间。
这里，文件信息包括待存储文件占用的第一空间，已存储文件包括已存储源文件和已存储备份文件。其中，已存储源文件是指在存储设备中已经存储的源文件；已存储备份文件是指在存储设备中对重要已存储源文件进行二次存储，形成该重要已存储源文件的备份文件。源文件是指可启动相应软件、并实现对应功能的文件。备份文件相当于对相应源文件的复制。
用户可通过终端访问已存储源文件，当用户通过终端访问已存储源文件时，终端系统发现所要访问的已存储源文件无法读出或已被损坏，则终端系统会转而访问已存储该源文件对应的已存储备份文件，从而实现该访问。同时，终端系统还会利用该已存储备份文件对无法读出或已被损坏的已存储源文件进行修复，以便用户之后的访问。
示例的，如图2所示，以终端访问已存储源文件为例，终端应用层的执行过程包括：
步骤1011、读取已存储源文件。
这里，终端系统的应用层是通过系统的读接口来读取已存储源文件。
步骤1012、判断已存储源文件是否读取成功，若是，则执行步骤1015；否则执行步骤1013。
步骤1013、读取相应的已存储备份文件。
当终端系统发现已存储源文件无法成功读取时，便去读取与该已存储源文件相应的已存储备份文件。具体的，是从闪存(Flash Memory)中读取已存储源文件和已存储备份文件。
步骤1014、根据已存储备份文件，修复相应的已存储源文件。
该已存储备份文件不仅能供终端系统读取，还可以对相应的已存储源
文件进行修复，以便之后的读取。
值得说明的是，如果读取已存储源文件异常时，可利用已存储备份文件对已存储源文件的修复，也可以将该修复放置在系统空闲状态下完成，
步骤1015、更新该已存储源文件的访问频次。
存储设备中还存放着已存储源文件相关信息，比如访问频次，每当对已存储源文件读取一次，访问频次便累加1。
值得说明的是，源文件和备份文件是存储于相同的存储设备中，即存储在存储空间中。其中，源文件对用户是可见的；而备份文件对用户而言可以是不可见的，仅对终端系统的后台可见。
这里，待存储文件包括待存储源文件和待存储备份文件，这里分两种情况：
情况一：待存储文件为待存储源文件。
这种情况是指首次创建源文件时，待存储文件就为待存储源文件。表明存储设备在之前并没有存储该待存储源文件，现在正准备将该待存储源文件存储至存储设备中。
情况二：待存储文件为待存储备份文件。
一方面，说明已存储源文件是已存储于存储设备中的，那么紧接着或者在预定条件下要对该已存储源文件进行备份，即待存储文件为待存储备份文件。
另一方面，终端系统发现某一个重要的已存储源文件，而在存储空间中并未发现与之对应的备份文件，那么此时终端系统就会对该重要的已存储源文件进行备份，待存储文件就为备份文件。
步骤102、根据第一空间和已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间。
具体的，如图3所示，终端根据第一空间和已存储空间，释放重要级
别最低的已存储备份文件所占用的释放空间包括：
步骤1021、判断第一空间是否大于剩余空间；若是，则执行步骤1022；否则执行步骤1024。
这里，剩余空间为存储设备的总空间中除了已存储空间之外的空间。
步骤1022、获取已存储文件的文件列表信息。
步骤1023、根据文件列表信息，释放重要级别最低的已存储备份文件所占用的释放空间。
步骤1024、直接存储待存储文件。
存储待存储文件之前，需要判断存储设备的剩余空间是否够用，即需要比较第一空间是否大于剩余空间。
当第一空间小于或者等于剩余空间时，说明存储设备的剩余空间足以存储该待存储文件，直接将该待存储文件存储于该存储设备中；
当第一空间大于剩余空间时，则表明存储设备的剩余空间过小，存储不下该待存储文件。终端系统可以及时感知到该状况，并且会采取一系列的措施，使得该待存储文件存储于存储设备中。具体的，终端系统会删除存储设备中重要级别最低的已存储备份文件，释放重要级别最低的已存储备份文件所占用的释放空间，从而存储该待存储文件。这样，从某种意义上就使得存储设备中存储了更多重要且有意义的文件，从而更好地为用户服务。
释放重要级别最低的已存储备份文件所占用的释放空间之前，就需要从已存储文件中辨别出重要级别最低的已存储备份文件，而已存储备份文件的重要级别是取决于与其对应的已存储源文件，当已存储源文件越重要就表明对应的已存储备份文件的重要级别越高。值得说明的是，存储设备中还会存放与一些如文件相关的文件列表信息，该文件列表信息是判别已存储源文件重要性的依据。
对于已存储源文件重要性的判定是一个带有较强主观因素的过程，也可由用户自由定义，是因人而异，可能会与用户的个人职业、爱好、习惯等密切相关，本实施例不做限定。优选的，本实施例中以对已存储源文件的访问频次和已存储源文件的创建时间为判定依据。
这里，文件列表信息用于标识已存储源文件的重要级别，文件列表信息包括已存储备份文件对应的源文件的访问频次和创建时间。具体的，获取所有已存储备份文件所对应的源文件的访问频次和创建时间；根据所有已存储备份文件所对应的源文件的访问次数和所有已存储备份文件所对应的源文件的创建时间，确定重要级别最低的已存储备份文件；释放重要级别最低的已存储备份文件所占用的释放空间。
值得说明的是，在存储设备中，已存储文件包括已存储源文件和已存储备份文件，其中，已存储源文件的总个数大于等于已存储备份文件的总个数。
具体的，按所有已存储备份文件所对应的源文件的访问次数和所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所有已存储备份文件所对应的源文件，形成源文件序列；将源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，重要级别最低的m个已存储备份文件所占的空间大于或等于第一空间和剩余空间之差，m为小于已存储备份文件总个数的正整数。
当释放重要级别最低的m个已存储备份文件所占的空间后，该重要级别最低的m个已存储备份文件所占的空间和原先的剩余空间共同组成新的剩余空间，此时，新的剩余空间一定大于或等于第一空间。换句话说，重要级别最低的m个已存储备份文件所占的空间是大于或等于第一空间和剩余空间之差的绝对值，使得存储空间能够存储该待存储文件。值得说明的是，当仅释放重要级别最低的m-1个已存储备份文件所占的空间后，新的
剩余空间和释放前一样，仍然小于第一空间，即重要级别最低的m-1个已存储备份文件所占的空间是小于第一空间和剩余空间之差的绝对值，存储设备无法存储该待存储文件。
步骤103、存储待存储文件。
在释放空间和剩余空间中，完成待存储文件的存储，即存储待存储文件。
在步骤102之前，所述方法还包括：周期性检测已存储源文件占用的第二空间；根据第二空间和总空间，强制释放重要级别最低的已存储备份文件。
具体的，如图4所示，终端根据第二空间和总空间，强制释放重要级别最低的已存储备份文件包括：
步骤1021’、获取第二空间和总空间。
步骤1022’、计算第二空间占总空间的占比。
步骤1023’、判断占比是否大于预设阈值；若是，则执行步骤1024’；否则执行步骤1021’。
优选的，预设阈值取50％。
步骤1024’、获取重要级别最低的已存储备份文件。
这里，所获取的重要级别最低的已存储备份文件的个数由用户预先设置，可以为介于1和已存储备份文件总个数之间的任意自然数。
步骤1025’、释放重要级别最低的已存储备份文件。
这里，特指释放步骤1024’中的重要级别最低的已存储备份文件。
在步骤103之后，所述方法还包括，及时更新存储设备中的文件列表信息。
这样一来，便可根据待存储文件的文件信息和已存储文件的已存储空间，释放重要级别最低的已存储备份文件，进而存储待存储文件，实现了
存储空间高效地动态回收，能够充分、有效地利用存储空间，从而避免了存储空间的浪费现象，最终存储和/或备份更多的重要文件。
实施例二
本发明实施例提供一种文件备份方法，应用于终端，假设以用户U在终端T上创建某一重要系统文件为例，本实施例中将该重要系统文件的源文件记为D，并将该重要系统文件的备份文件记为D’。如图5所示，该方法包括：
步骤201、T接收U创建D的请求。
首先，U会向T发出创建D的请求；接着，T就接收到U需要创建D的请求。这些动作可以通过U的点击操作和T的内部运作完成。
步骤202、T的应用层调用系统写接口。
在T的内部，是通过系统写接口对文件进行存储，即将文件存储于T的存储设备中。具体的，T是通过应用层调用系统写接口，实现写操作。
这里，应用层是开放式系统互联(Open Systems Interconnection reference，OSI)的第七层，应用层是与其他计算机进行通讯的一个应用，是对应应用程序的通信服务。其中，OSI模型定义了不同计算机互联的标准，是设计和描述计算机网络通讯的基本框架。
步骤203、T计算D占用的空间。
计算出D所需占用的空间，即计算出存储D时，需要的存储空间是多少。
步骤204、T获取存储设备的剩余空间。
同时，T会自动获取到自身存储设备的剩余空间。具体的，首先获取存储设备的总空间；接着，获取到已存储文件所占用的已存储空间；最后，用总空间减去已存储空间，所得的差值就为存储设备的剩余空间，值得说明的是，已存储文件不仅包括已存储源文件，还包括已存储备份文件，也
就是说，已存储空间包括已存储源文件占用空间和已存储备份文件占用空间。
步骤205、T判断D所需占用的空间是否大于存储设备的剩余空间，若是，则执行步骤206；否则执行步骤207。
步骤206、T释放存储设备中重要级别最低的已存储备份文件所占用的释放空间。
在该情况下，说明T的存储设备的剩余空间不够存储D。当T检测到该状况时，会自动启动存储空间回收机制，具体的，T会执行释放存储设备中重要级别最低的已存储备份文件所占用的释放空间的操作，即删除重要级别最低的已存储备份文件，从而获得比释放前更多的剩余空间，最终使得可以将D存储于T的存储设备中。值得说明的是，删除重要级别最低的已存储备份文件的方法可以是每次删除1个，直至新的剩余空间可以存储D。每次删除的个数也可由用户指定。
步骤207、T在存储设备中创建D。
将D存储与T的存储设备中，也就是说在T的存储设备中创建D。同时，在T的存储设备中形成了D的文件列表信息，一方面，该文件列表信息包括用于标识D的重要程度的信息；另一方面，该文件列表信息还包括对D的索引信息，以便于U需要访问D时，T可以通过索引信息迅速地找到D。
步骤208、T在存储设备中存储D’。
由于D为重要的系统文件，所以在创建D之后，需要对其相应的备份文件D’进行存储。
值得说明的是，在实际操作时，存储D’可以在D创建完毕后立刻进行，也可以将存储D’安排在系统空闲状态下由T的文件系统完成，本实施例对该过程不做限制。
这样一来，便可根据待存储文件的文件信息和已存储文件的已存储空间，释放重要级别最低的已存储备份文件，进而存储待存储文件，实现了存储空间高效地动态回收，能够充分、有效地利用存储空间，从而避免了存储空间的浪费现象，最终存储和/或备份更多的重要文件。
实施例三
本发明实施例提供的一种终端30，如图6所示，该终端30包括：
获取模块301，配置为获取待存储文件的文件信息和已存储文件占用的已存储空间，文件信息包括待存储文件占用的第一空间，已存储文件包括已存储源文件和已存储备份文件；
释放模块302，配置为根据第一空间和已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间；
存储模块303，配置为存储待存储文件。
这样一来，便可根据待存储文件的文件信息和已存储文件的已存储空间，释放重要级别最低的已存储备份文件，进而存储待存储文件，实现了存储空间高效地动态回收，能够充分、有效地利用存储空间，从而避免了存储空间的浪费现象，最终存储和/或备份更多的重要文件。
具体的，如图7所示，释放模块302包括：
判断单元3021，配置为判断第一空间是否大于剩余空间；剩余空间为存储设备的总空间中除了已存储空间之外的空间；
获取单元3022，配置为第一空间大于剩余空间时，获取已存储文件的文件列表信息；
释放单元3023，配置为根据文件列表信息，释放重要级别最低的已存储备份文件所占用的释放空间。
具体的，文件列表信息用于标识所述已存储源文件的重要级别，文件列表信息包括已存储备份文件对应的源文件的访问频次和创建时间，如图8
所示，释放单元3023包括：
获取子单元30231，配置为获取所有已存储备份文件所对应的源文件的访问频次和创建时间；
确定子单元30232，配置为根据所有已存储备份文件所对应的源文件的访问次数和所有已存储备份文件所对应的源文件的创建时间，确定重要级别最低的已存储备份文件；
释放子单元30233，配置为释放重要级别最低的已存储备份文件所占用的释放空间。
具体的，确定子单元30232具体配置为：
按所有已存储备份文件所对应的源文件的访问次数和所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所有已存储备份文件所对应的源文件，形成源文件序列；
将源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，重要级别最低的m个已存储备份文件所占的空间大于或等于第一空间和剩余空间之差，m为小于已存储备份文件总个数的正整数。
具体的，如图9所示，该终端30还包括：
检测模块304，配置为周期性检测已存储源文件占用的第二空间；
所述释放模块303还配置为根据第二空间和总空间，强制释放重要级别最低的已存储备份文件。
在实际应用中，所述获取模块301、释放模块302、存储模块303、检测模块304、判断单元3021、获取单元3022、释放单元3023、获取子单元30231、确定子单元30232和释放子单元30233均可由位于终端30中的中央处理器(Central Processing Unit，CPU)、微处理器(Micro Processor Unit，MPU)、数字信号处理器(Digital Signal Processor，DSP)、或现场可编程门
阵列(Field Programmable Gate Array，FPGA)等实现。
本发明实施例中提出的终端中的存储模块303可以通过终端上的存储器实现，获取模块301、释放模块302、检测模块304、判断单元3021、获取单元3022、释放单元3023、获取子单元30231、确定子单元30232和释放子单元30233都可以通过终端上的处理器来实现，当然也可通过具体的逻辑电路实现；在实际应用中，处理器可以为中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)或现场可编程门阵列(FPGA)等。
本发明实施例中，如果以软件功能模块的形式实现上述文件存储方法，并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机程序，该计算机程序用于执行本发明实施例的上述文件存储方法。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序
产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
Claims (11)
- 一种文件存储方法，所述方法包括：获取待存储文件的文件信息和已存储文件占用的已存储空间，所述文件信息包括所述待存储文件占用的第一空间，所述已存储文件包括已存储源文件和已存储备份文件；根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间；存储所述待存储文件。
- 根据权利要求1所述的方法，其中，所述根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间包括：判断所述第一空间是否大于剩余空间；所述剩余空间为存储设备的总空间中除了所述已存储空间之外的空间；所述第一空间大于所述剩余空间时，获取已存储文件的文件列表信息；根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间。
- 根据权利要求2所述的方法，其中，所述文件列表信息用于标识所述已存储源文件的重要级别，所述文件列表信息包括所述已存储备份文件对应的源文件的访问频次和创建时间，所述根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间包括：获取所有已存储备份文件所对应的源文件的访问频次和创建时间；根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件；释放所述重要级别最低的已存储备份文件所占用的释放空间。
- 根据权利要求3所述的方法，其中，所述根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件包括：按所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所述所有已存储备份文件所对应的源文件，形成源文件序列；将所述源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，所述重要级别最低的m个已存储备份文件所占的空间大于或等于所述第一空间和所述剩余空间之差，所述m为小于所述已存储备份文件总个数的正整数。
- 根据权利要求1至4任一项所述的方法，其中，所述根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间之前，所述方法还包括：周期性检测所述已存储源文件占用的第二空间；根据所述第二空间和所述总空间，强制释放所述重要级别最低的已存储备份文件。
- 一种终端，所述终端包括：获取模块，配置为获取待存储文件的文件信息和已存储文件占用的已存储空间，所述文件信息包括所述待存储文件占用的第一空间，所述已存储文件包括已存储源文件和已存储备份文件；释放模块，配置为根据所述第一空间和所述已存储空间，释放重要级别最低的已存储备份文件所占用的释放空间；存储模块，配置为存储所述待存储文件。
- 根据权利要求6所述的终端，其中，所述释放模块包括：判断单元，配置为判断所述第一空间是否大于剩余空间；所述剩余空 间为存储设备的总空间中除了所述已存储空间之外的空间；获取单元，配置为所述第一空间大于所述剩余空间时，获取已存储文件的文件列表信息；释放单元，用于根据所述文件列表信息，释放所述重要级别最低的已存储备份文件所占用的释放空间。
- 根据权利要求7所述的终端，其中，所述文件列表信息用于标识所述已存储源文件的重要级别，所述文件列表信息包括所述已存储备份文件对应的源文件的访问频次和创建时间，所述释放单元包括：获取子单元，配置为获取所有已存储备份文件所对应的源文件的访问频次和创建时间；确定子单元，配置为根据所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间，确定所述重要级别最低的已存储备份文件；释放子单元，配置为释放所述重要级别最低的已存储备份文件所占用的释放空间。
- 根据权利要求8所述的终端，其中，所述确定子单元具体配置为：按所述所有已存储备份文件所对应的源文件的访问次数和所述所有已存储备份文件所对应的源文件的创建时间依次递增的顺序排列所述所有已存储备份文件所对应的源文件，形成源文件序列；将所述源文件序列中前m个源文件对应的已存储备份文件标记为重要级别最低的m个已存储备份文件，所述重要级别最低的m个已存储备份文件所占的空间大于或等于所述第一空间和所述剩余空间之差，所述m为小于所述已存储备份文件总个数的正整数。
- 根据权利要求6至9任一项所述的终端，其中，所述终端还包括：检测模块，配置为周期性检测所述已存储源文件占用的第二空间；所述释放模块还配置为根据所述第二空间和所述总空间，强制释放所述重要级别最低的已存储备份文件。
- 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行权利要求1至5任一项所述的文件存储方法。
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| CN110275870A (zh) * | 2019-05-22 | 2019-09-24 | 深圳壹账通智能科技有限公司 | 缓存文件的管理方法、装置、计算机设备及存储介质 |
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