CN111859458A - Data updating recording method, system, medium and equipment - Google Patents
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- 230000002159 abnormal effect Effects 0.000 abstract description 8
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Abstract
The invention relates to a data updating recording method, system, medium and device, the method includes: setting a write-in mode of writing data in an application program into a disk as a direct write mode; setting a file to be written into a double copy, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk; and when the file to be written has a data updating requirement and is stored, alternately writing the data in a double-cache mode. The embodiment of the invention sets the mode of writing data into the disk in the application program as a direct writing mode, so that the time for actually writing the data into the disk is immediate writing, thereby greatly reducing the possibility of data damage caused by abnormal power failure and hard reset; in addition, a double-cache alternate writing mode is adopted, so that data is alternately written into two files, and at least one file is ensured to be safe when written into each file. By combining the two measures, the data file dynamically stored by the software is effectively protected.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method, a system, a medium, and a device for updating and recording data.
Background
Modern information systems put increasing demands on the reliability of their human-computer interaction terminals. The application software of the human-computer interaction terminal often needs to record various types of data of the whole information system, so that the problem of file damage caused by power failure in the writing process cannot be avoided, and the damage often causes that the data of the whole file is emptied. Such problems relate to the category of data-level reliability, which modern information systems cannot allow, and which human-computer interaction system development must face and solve.
For data level protection, the more commonly adopted method is a write-once method before shutdown, that is: the special partition is set for the file needing to be written, the partition is loaded only before shutdown, and the writing operation is limited when a normal shutdown instruction is received, so that fault points are reduced.
For data level protection, although the write-once method before shutdown reduces the fault points on the whole, if abnormal power failure occurs in the shutdown stage, file damage cannot be avoided; and if the abnormal power failure occurs in the working stage, the data change which has occurred cannot be saved.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method, a system, a medium and a device for updating and recording data, aiming at the problems existing in the prior art.
To solve the foregoing technical problem, an embodiment of the present invention provides a data update recording method, including: setting a write-in mode of writing data in an application program into a disk as a direct write mode; setting a file to be written into double copies, namely a first file and a second file, and placing the first file and the second file in different partitions of a disk; and when the file to be written has a data updating requirement and is stored, alternately writing the data in a double-cache mode.
To solve the above technical problem, an embodiment of the present invention further provides a data update recording system, including: the write-in mode setting module is used for setting a write-in mode of writing data in the application program into a disk as a direct write-in mode; the file initialization module is used for setting a file to be written into a duplicate, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk; and the data writing module is used for alternately writing data in a double-cache mode when the file to be written has a data updating requirement and is stored.
In order to solve the above technical problem, an embodiment of the present invention further provides a computer-readable storage medium, which includes instructions, and when the instructions are run on a computer, the instructions cause the computer to execute the data update recording method according to the above technical solution.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the data update recording method according to the foregoing technical solution when executing the program.
The invention has the beneficial effects that: the method sets the mode of writing data in the application program into the disk as a direct writing mode, so that the time for actually writing the data into the disk is immediate writing, thereby greatly reducing the possibility of data damage caused by abnormal power failure and hard reset; in addition, a double-cache alternate writing mode is adopted, so that data is alternately written into two files, and because only one file is written into each time and the next writing is not accepted before the writing is finished, at least one file is ensured to be safe during each writing. By combining the two measures, the data file dynamically stored by the software is effectively protected.
Additional aspects of the invention and its advantages will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a data update recording method according to an embodiment of the present invention;
FIG. 2 is a flowchart of a file selecting and reading operation according to an embodiment of the present invention;
FIG. 3 is a flowchart of a file write operation according to an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic flow chart of a data update recording method according to an embodiment of the present invention. As shown in fig. 1, the method includes:
s110, setting a write-in mode of writing data in an application program into a disk as a direct write-in mode;
write-back is a default strategy for file write-in operation of a modern operating system, and because an application program cannot control the time for actually writing data into a disk, the data is directly powered off and shut down after being written under a harsh environment, so that data files are easily damaged. In the embodiment of the invention, before the file is written, the writing mode is designated as the direct writing mode through the corresponding interface under the operating system. The real time of writing data into the disk is changed from dynamic regulation of the operating system to immediate writing, thereby greatly reducing the possibility of data damage caused by abnormal power failure and hard reset.
S120, setting a file to be written into double copies, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk;
and S130, when the file to be written has a data updating requirement and is stored, alternately writing the data in a double-cache mode.
The embodiment of the invention provides a brand-new realization method for updating and recording high-reliability data, wherein a mode of writing data in an application program into a disk is changed from a 'write-back' mode which is defaulted by a mainstream desktop operating system to a 'write-through' mode, so that the time for really writing the data into the disk is changed from dynamic regulation and control of the operating system to immediate writing, and the possibility of data damage caused by abnormal power failure and hard reset is greatly reduced; in addition, a double-cache alternate writing mode is adopted, so that data is alternately written into two files, and because only one file is written into each time and the next writing is not accepted before the writing is finished, at least one file is ensured to be safe during each writing. By combining the two measures, the data file dynamically stored by the software is effectively protected.
Optionally, when the file to be written has a data update requirement and is saved, performing data alternate writing in a double-cache manner includes: and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into one of the first file and the second file, and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into the other file, and thus, alternately carrying out writing operation. And when all data items including the new data are completely written into the first file or the second file, writing an update sequence number into the file header of the corresponding file.
Namely: the first file is written a first time, the second file is written a second time, the first file is written a third time, and the second file is written a fourth time … …. In addition to writing data, an update sequence number is written in the header so that the latest file can be determined at the next access. Because only one file is written into each time and the next writing is not accepted before the writing is finished, at least one file is ensured to be safe when written into each time.
The parameters in the file are read once only after the application program is started, and exception handling is performed during reading. The flow chart of the file selection and reading operation is shown in FIG. 2. Specifically, when the application program is started, all parameters in the latest file are read to the memory array by comparing file headers of the first file and the second file. And if the parameter table is accessed to find that the file is abnormal (such as the parameter has a defect or an over-value field), loading all the parameters in the other file to the memory array, and giving a prompt of 'recovering the latest correct configuration' in the interface. In addition, an initial copy (namely a factory parameter table) of the file to be written is also set, the initial copy is placed in a read-only partition of a disk, when the first file (namely the file a) and the second file (namely the file b) are damaged, the initial copy is loaded, all parameters in the initial copy are read to a memory array, and a prompt of 'factory parameter recovery' is given.
The method comprises the steps of comparing a first file with a second file, before selecting a file with a newer sequence number, judging whether at least one of the first file and the second file is opened successfully or not, and whether at least one of the sequence numbers of the first file and the second file is valid or not, and when at least one of the first file and the second file is opened successfully and at least one of the sequence numbers of the first file and the second file is valid, reading all parameters in the latest file to a memory array by comparing file headers of the first file and the second file. The valid sequence number of the file refers to a value which can be read in a specified position and is within a sequence number appointed range. When a file is corrupted, the corresponding value is not read at the specified location.
Optionally, as shown in fig. 3, when there is a data update demand and saving is performed, completely writing all data items including new data into one of the first file and the second file, including: when parameters in the memory array are changed and the states of the first file and the second file are intact, comparing file headers of the first file and the second file, and opening the file with the older sequence number; and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
When parameters in the memory array are changed and the first file and the second file have wrong files, opening the files with errors; and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
In the above embodiment, when parameters in the memory array are changed and the states of the first file and the second file are intact, comparing file headers of the first file and the second file, and opening the file with the older sequence number; and writing all the parameters in the memory array into the opened files in sequence, so that data is written into the two files alternately, only one file is written into each time, and the next writing is not accepted before the writing is finished, thereby ensuring that at least one file is safe in each writing and improving the safety of data writing.
In addition, when parameters in the memory array are changed and the first file and the second file have wrong files, the files with errors are opened; and completely writing all data items containing new data in the memory into the opened file, thereby repairing the file with the error and restoring the system to the state that the first file and the second file are both intact.
The embodiment of the invention also provides a data updating and recording system which comprises a writing mode setting module, a file initialization module and a data writing module. The write-in mode setting module is used for setting a write-in mode of writing data in an application program into a disk as a direct write-in mode; the file initialization module is used for setting a file to be written into a duplicate, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk; and the data writing module is used for alternately writing data in a double-cache mode when the file to be written has a data updating requirement and is stored.
In the data updating and recording system provided by the embodiment, the mode of writing data in the application program into the disk is changed from the default 'write-back' mode of the mainstream desktop operating system to the 'direct-writing' mode, so that the time for actually writing the data into the disk is changed from the dynamic regulation and control of the operating system to the immediate writing, and the possibility of data damage caused by abnormal power failure and hard reset is greatly reduced; in addition, a double-cache alternate writing mode is adopted, so that data is alternately written into two files, and because only one file is written into each time and the next writing is not accepted before the writing is finished, at least one file is ensured to be safe during each writing. By combining the two measures, the data file dynamically stored by the software is effectively protected.
The data updating recording system also comprises a file selecting and data reading module, and the file selecting and data reading module is used for reading all parameters in the latest file to the memory array by comparing file headers of the first file and the second file when the application program is started.
When the application program is started, in the process of reading all the parameters in the latest file to the memory array by comparing the file headers of the first file and the second file, if the parameter table is accessed to find abnormality, all the parameters in the other file are loaded to the memory array, and a prompt of 'recovering the latest correct configuration' is given in an interface.
When a first file and a second file of a file to be written are set, an initial copy of the file to be written is also set, the initial copy is placed in a read-only partition of a magnetic disk, and when the first file and the second file are both damaged, the initial copy (namely a factory parameter table in an attached figure 2) is loaded, and a prompt of 'factory parameters restored' is given. The three situations shown in fig. 2 may be included in which the first file and the second file are both destroyed, that is, the first file and the second file cannot be successfully opened, the serial numbers of the first file and the second file are both invalid, and errors exist in both the first file and the second file in the parameter reading process.
The data writing module is specifically configured to: and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into one of the first file and the second file, and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into the other file, and thus, alternately carrying out writing operation.
The data writing module is further configured to: and when all data items including the new data are completely written into the first file or the second file, writing an update sequence number into the file header of the corresponding file.
The data writing module is specifically configured to: when parameters in the memory array are changed and the states of the first file and the second file are intact, comparing file headers of the first file and the second file, and opening the file with the older sequence number; and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
When parameters in the memory array are changed and the first file and the second file have wrong files, opening the files with errors; and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
An embodiment of the present invention further provides a computer-readable storage medium, which includes instructions, and when the instructions are run on a computer, the instructions cause the computer to execute the data update recording method provided in the foregoing embodiment.
The embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the data update recording method provided in the above embodiment is implemented.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A data update recording method, comprising:
setting a write-in mode of writing data in an application program into a disk as a direct write mode;
setting a file to be written into a double copy, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk;
and when the file to be written has a data updating requirement and is stored, alternately writing the data in a double-cache mode.
2. The method according to claim 1, wherein when the file to be written has a data update requirement and is saved, performing data alternate writing in a double-cache manner comprises: and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into one of the first file and the second file, and when the data updating is required and the saving is carried out, completely writing all the data items including the new data into the other file, and thus, alternately carrying out writing operation.
3. Method according to claim 2, characterized in that when all data items including new data are written completely in the first file or the second file, the update sequence number is written in the file header of the corresponding file.
4. The method of claim 3, further comprising, when the application program is started, reading all parameters in the latest file into the memory array by comparing the file headers of the first file and the second file;
when there is a data updating demand and the data is saved, completely writing all data items including new data into one of the first file and the second file, including:
when parameters in the memory array are changed and the states of the first file and the second file are intact, comparing file headers of the first file and the second file, and opening the file with the older sequence number;
and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
5. The method according to claim 4, wherein when parameters in the memory array are changed and an error file exists in the first file and the second file, the error file is opened;
and writing all the parameters in the memory array into the opened file in sequence, updating the sequence number in the file header to be 'the updated sequence number of another file + 1', and closing the current file.
6. The method according to claim 4, wherein during the process of reading all parameters in the latest file to the memory array by comparing the file headers of the first file and the second file at the time of starting the application program, if the parameter table is accessed to find an exception, all parameters in the other file are loaded to the memory array, and a prompt of "the latest correct configuration has been recovered" is given in the interface.
7. The method according to any one of claims 1 to 6, further comprising setting an initial copy of the file to be written, placing the initial copy in a read-only partition of a disk, loading the initial copy when both the first file and the second file are destroyed, and giving a prompt of "factory parameters restored".
8. A data update recording system, comprising:
the write-in mode setting module is used for setting a write-in mode of writing data in the application program into a disk as a direct write-in mode;
the file initialization module is used for setting a file to be written into a duplicate, namely setting a first file and a second file, and placing the first file and the second file in different partitions of a disk;
and the data writing module is used for alternately writing data in a double-cache mode when the file to be written has a data updating requirement and is stored.
9. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the data update recording method according to any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the data update recording method according to any one of claims 1 to 7 when executing the program.
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