CN112860646B - Method for distributed aggregate compression and unitary extraction of mass file files - Google Patents
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/17—Details of further file system functions
- G06F16/174—Redundancy elimination performed by the file system
- G06F16/1744—Redundancy elimination performed by the file system using compression, e.g. sparse files
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- G06F16/10—File systems; File servers
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2107—File encryption
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Abstract
The invention relates to the field of data security, in particular to a method for distributed aggregate compression and unitary extraction of mass file archives, which comprises the following file analysis stages: calculating a corresponding pre-compression grouping scheme by performing operations such as unified analysis, data information grouping, compression ratio control and the like on a target file; and (3) file compression stage: compressing and packaging files in a specified mode through a pre-compression grouping scheme obtained in a file analysis stage, and recording verification information of the corresponding files; a safety verification stage: and after the file compression stage is finished, reading compressed file information, checking and verifying the compressed file information with the content in the pre-compression grouping scheme, and if the file compression stage fails, re-compressing and verifying until the file compression stage succeeds.
Description
Technical Field
The invention relates to the field of data security, in particular to a method for distributed aggregate compression and unitary extraction of mass file archives.
Background
Packaging the archive files: 1. the original file volume can be greatly reduced, and the storage space and the transmission time are saved; 2. scattered file files in a computer can be integrated, so that only a single file needs to be transmitted during network transmission; 3. the packed archive file can be encrypted, so that virus infection or manual tampering in the uploading and downloading processes is avoided, and the data reliability is improved.
However, the conventional file packaging method can only uniformly package all the target files, and a more flexible and free packaging scheme is lacking. When a compressed package is corrupted, all files within the compressed package are corrupted. In addition, in the process of uniform packaging, the disk space of the same level is required as the temporary swap space. If the number of the target files is too large, the situation that the disk space is insufficient exists. After the compression is finished, all the files are in one compression package, so that subsequent management and use are inconvenient.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a method for distributed aggregation compression and unitary extraction of mass file files.
The technical purpose of the invention is realized by the following technical scheme:
a method for distributed aggregate compression and unitary extraction of mass file archives comprises the following stages:
a file analysis stage: calculating a corresponding pre-compression grouping scheme by performing operations such as unified analysis, data information grouping, compression ratio control and the like on the target file;
and (3) file compression stage: compressing and packaging files in a specified mode through a pre-compression grouping scheme obtained in a file analysis stage, and recording verification information of the corresponding files;
a safety verification stage: and after the file compression stage is finished, reading compressed file information, checking and verifying the compressed file information with the content in the pre-compression grouping scheme, and if the file compression stage fails, re-compressing and verifying until the file compression stage succeeds.
Preferably, the file analysis stage comprises the following specific steps:
1. analyzing a target file to obtain file characteristic information, wherein the file characteristic information comprises a file name, a file type, a file size, a file HASH value, modification time and creation time, and is arranged in a reverse order according to the file type and the file size to form a file sequence to be backed up;
2. according to the set size and compression grade of a single compression packet file, sampling and analyzing a file sequence to be backed up according to file types, and acquiring compression ratios of the file types under different compression grades (only storage, quickest, standard, better and best, and the compression ratio is gradually increased from only storage to better);
the sampling analysis rule is as follows:
1) Classifying and organizing file types by taking the suffix name of the file as a standard;
2) Extracting 5 files (less than 5 files are extracted completely) of each file type, and compressing the files by reservation;
3) Obtaining the size of a compressed file of a corresponding file type, and calculating the compression ratio according to the following calculation rules: file compression ratio = file compressed size/file original size;
3. traversing files in a file sequence to be backed up, and calculating the size of the current compressed file according to the size of the file and the file type compression ratio, wherein the calculation method comprises the following steps: size after file compression = file size × file compression ratio;
4. and carrying out unified aggregation according to the calculated sizes of the files to form a file group to be compressed.
Preferably, the method for grouping the files to be compressed comprises the following steps:
(1) According to the file sequence generated in the first file analysis stage, sequentially accumulating the compressed sizes of the files calculated in the second step from the first file;
1) When the accumulated file size is larger than the set size of a single compressed packet file, skipping over the current file and continuing accumulating the next file;
2) When the accumulated file size is equal to the set size of a single compressed packet file, completing aggregation of one file group, and starting aggregation of the next file group;
(2) And when the aggregation of the last file is completed, forming a new packet by the files which are currently grouped and aggregated, and finishing the grouping process.
Preferably, the file compression stage comprises the following specific steps:
1. traversing the file groups to be compressed, analyzing the current system resource occupation condition, and putting the specified groups into the compression thread under the condition that the system resources are idle;
2. selecting a compression level: the compression grade is divided into storage only, quickest, fast, standard, better and best, and the compression ratio is gradually increased from storage only to better;
(1) Only store: the file is not compressed, the compression and decompression speed is high, and the size of the compressed file is the same as that of the source file;
(2) Fastest: the compression ratio is small, the compression and decompression speed is high, and the compressed file is a little smaller than the source file;
(3) And (3) fast: the compression ratio is smaller, the compression and decompression speed is second to the fastest speed, and the compressed file is smaller than the source file;
(4) The standard is as follows: the compression ratio is moderate, the compression and decompression speed is moderate, and the size of the compressed file is moderate;
(5) Preferably: the compression ratio is large, the compression and decompression speed is slow, and the file size is small;
(6) Preferably, the method comprises the following steps: the compression ratio is large, the compression and decompression speed is slow, and the file occupation is small.
3. Selecting an encryption mode: adopting common encryption, an AES128 encryption algorithm or an AES256 encryption algorithm and calculating the HASH value of the compressed packet, wherein the encryption password is used for decrypting the compressed packet, and the HASH value is used for verifying the integrity of the compressed packet;
4. and performing 7Z/ZIP compression on the grouped file according to the preset file compression level, the volume size, the encryption mode and the encryption password.
Preferably, the specific steps of the security verification stage are as follows:
1. reading the data stream after the file compression according to the encryption mode, thereby obtaining the file characteristic information, the HASH value verification information and the like in the compressed packet;
2. the file characteristic information and the HASH value verification information obtained in the first step are subjected to consistency verification comparison with the source grouping file, and the comparison contents comprise: file name, file type, file size, file HASH value, modification time, creation time, compressed packet HASH value;
3. if the comparison result in the step two is consistent, the verification is passed; if the comparison result is not consistent, the verification fails, the compressed file is deleted, and the file compression stage is carried out again.
In conclusion, the invention has the beneficial effects that: when a certain file in the compressed packet is damaged, the decompression and the use of other files in the compressed packet are not influenced; in the compression process, various encryption verification methods are adopted to ensure the security of the file; after the volumes are compressed, all information of any single file can be extracted from a certain file group without depending on other volumes.
Detailed Description
The following specific examples are given by way of illustration only and not by way of limitation, and it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made in the examples without inventive faculty, and yet still be protected by the scope of the claims.
The present invention will be described in detail with reference to examples.
Example 1:
a method for distributed aggregate compression and unitary extraction of mass file archives comprises the following stages:
a file analysis stage: the corresponding pre-compression grouping scheme is calculated by carrying out operations such as unified analysis, data information grouping, compression ratio control and the like on the target file, and the method specifically comprises the following steps:
1. analyzing a target file to obtain file characteristic information, wherein the file characteristic information comprises a file name, a file type, a file size, a file HASH value, modification time and creation time, and is arranged in a reverse order according to the file type and the file size to form a file sequence to be backed up;
2. according to the set size and compression grade of a single compression packet file, sampling and analyzing a file sequence to be backed up according to file types, and acquiring compression ratios of the file types under different compression grades (only storage, quickest, standard, better and best, and the compression ratio is gradually increased from only storage to better);
the sampling analysis rule is as follows:
1) Classifying and organizing file types by taking the suffix name of the file as a standard;
2) Extracting 5 files (less than 5 files are all extracted) of each file type, and compressing the files in a predetermined manner;
3) Obtaining the size of a compressed file of a corresponding file type, and calculating the compression ratio according to the following calculation rules: file compression ratio = file compressed size/file original size;
3. traversing files in a file sequence to be backed up, and calculating the size of the current compressed file according to the size of the file and the file type compression ratio, wherein the calculation method comprises the following steps: size after file compression = file size × file compression ratio;
4. and carrying out unified aggregation according to the calculated sizes of the files to form a file group to be compressed, wherein the method for grouping the files to be compressed comprises the following steps:
(1) According to the file sequence generated in the first file analysis stage step, sequentially accumulating the compressed file sizes calculated in the second step from the first file;
1) When the accumulated file size is larger than the set size of a single compressed packet file, skipping over the current file and continuing accumulating the next file;
2) When the accumulated file size is equal to the set size of a single compressed packet file, completing aggregation of one file group, and starting aggregation of the next file group;
(2) And when the aggregation of the last file is completed, forming a new packet by the files which are currently grouped and aggregated, and finishing the grouping process.
And (3) file compression stage: the method comprises the following steps of compressing and packaging files in a specified mode through a pre-compression grouping scheme obtained in a file analysis stage, and recording verification information of the corresponding files, wherein the method comprises the following specific steps:
1. traversing the file groups to be compressed, analyzing the current system resource occupation condition, and putting the specified groups into the compression thread under the condition that the system resources are idle;
2. selecting a compression level: the compression grade is divided into storage only, quickest, fast, standard, better and best, and the compression ratio is gradually increased from storage only to better;
(1) Only store: the file compression method has the advantages that the file compression method is not compressed, the compression and decompression speed is high, and the size of the compressed file is the same as that of a source file;
(2) Fastest: the compression ratio is small, the compression and decompression speed is high, and the compressed file is a little smaller than the source file;
(3) And (3) fast: the compression ratio is smaller, the compression and decompression speed is second to the fastest speed, and the compressed file is smaller than the source file;
(4) The standard is as follows: the compression ratio is moderate, the compression and decompression speed is moderate, and the size of the compressed file is moderate;
(5) Preferably: the compression ratio is large, the compression and decompression speed is slow, and the file size is small;
(6) Preferably, the method comprises the following steps: the compression ratio is large, the compression and decompression speed is slow, and the file occupation is small.
3. Selecting an encryption mode: adopting common encryption, an AES128 encryption algorithm or an AES256 encryption algorithm and calculating the HASH value of the compressed packet, wherein the encryption password is used for decrypting the compressed packet, and the HASH value is used for verifying the integrity of the compressed packet;
4. and performing 7Z/ZIP compression on the grouped file according to the preset file compression level, the volume size, the encryption mode and the encryption password.
And a safety verification stage: after the file compression stage is completed, reading compressed file information, checking and verifying the compressed file information with the content in the pre-compression grouping scheme, if the file compression stage fails, re-compressing and verifying until the file compression stage succeeds, and the specific steps are as follows:
1. reading the data stream after the file compression according to the encryption mode, thereby obtaining the file characteristic information, the HASH value verification information and the like in the compressed packet;
2. the file characteristic information and the HASH value verification information obtained in the first step are compared with the source grouping file for consistency verification, and the comparison contents comprise: file name, file type, file size, file HASH value, modification time, creation time, compressed packet HASH value;
3. if the comparison result in the second step is consistent, the verification is passed; if the comparison result is not consistent, the verification fails, the compressed file is deleted, and the file compression stage is carried out again.
Claims (3)
1. A method for distributed aggregate compression and unitary extraction of mass file archives is characterized by comprising the following stages:
a file analysis stage: the corresponding pre-compression grouping scheme is calculated by carrying out unified analysis, data information grouping and compression ratio control operation on the target file, and the method specifically comprises the following steps:
1. analyzing a target file to obtain file characteristic information, wherein the file characteristic information comprises a file name, a file type, a file size, a file HASH value, modification time and creation time, and is arranged in a reverse order according to the file type and the file size to form a file sequence to be backed up;
2. according to the set size and compression grade of a single compression packet file, sampling and analyzing a file sequence to be backed up according to file types to obtain compression ratios of the file types under different compression grades, wherein the compression grades are only stored, fastest, fast, standard, better and best, and the compression ratios are gradually increased from only storing to better;
the sampling analysis rules are as follows:
1) Classifying and organizing file types by taking the suffix name of the file as a standard;
2) Extracting 5 files of each file type for reserved compression, and if the number of the files is less than 5, extracting all the files for reserved compression;
3) Obtaining the size of a compressed file of a corresponding file type, and calculating the compression ratio according to the following calculation rules: file compression ratio = file compressed size/file original size;
3. traversing files in a file sequence to be backed up, and calculating the size of the current compressed file according to the size of the file and the file type compression ratio, wherein the calculation method comprises the following steps: the size of the compressed file = file size × file compression rate;
4. and carrying out unified aggregation according to the calculated sizes of the files to form a file group to be compressed, wherein the method for grouping the files to be compressed comprises the following steps:
(1) According to the file sequence generated in the first file analysis stage, sequentially accumulating the compressed sizes of the files calculated in the second step from the first file;
1) When the accumulated file size is larger than the set size of a single compressed packet file, skipping over the current file and continuing accumulating the next file;
2) When the accumulated file size is equal to the set size of a single compressed packet file, finishing the aggregation of one file group and starting the aggregation of the next file group;
(2) When the last file finishes aggregation, forming a new group by the files which are currently grouped and aggregated, and finishing the grouping process;
and (3) file compression stage: compressing and packaging files in the grouping scheme in a designated mode through a pre-compression grouping scheme obtained in a file analysis stage, and recording verification information of the corresponding files;
and a safety verification stage: and after the file compression stage is finished, reading compressed file information, checking and checking the compressed file information with the content in the pre-compression grouping scheme, and if the compressed file information fails, re-compressing and checking until the compressed file information succeeds.
2. The method for distributed aggregate compression and unitary extraction of mass file archives according to claim 1, wherein the file compression stage comprises the following specific steps:
1. traversing the file groups to be compressed, analyzing the current system resource occupation condition, and putting the specified groups into the compression thread under the condition that the system resources are idle;
2. selecting a compression level: the compression grade is divided into only storage, fastest, fast, standard, better and best, and the compression ratio is gradually increased from only storage to better;
3. selecting an encryption mode: adopting a common encryption algorithm, an AES128 encryption algorithm or an AES256 encryption algorithm and calculating the HASH value of the compressed packet, wherein the encryption password is used for decrypting the compressed packet, and the HASH value is used for verifying the integrity of the compressed packet;
4. and performing 7Z/ZIP compression on the grouped file according to the preset file compression level, the volume size, the encryption mode and the encryption password.
3. The method for distributed aggregate compression and unitary extraction of mass file archives according to claim 1, wherein the security check stage comprises the following specific steps:
1. reading the data stream after the file compression according to the encryption mode, thereby obtaining the file characteristic information and the HASH value verification information in the compressed packet;
2. the file characteristic information and the HASH value verification information obtained in the first step are subjected to consistency verification comparison with the source grouping file, and the comparison contents comprise: file name, file type, file size, file HASH value, modification time, creation time, compressed packet HASH value;
3. if the comparison result in the step two is consistent, the verification is passed; if the comparison result is not consistent, the verification fails, the compressed file is deleted, and the file compression stage is carried out again.
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