CN112698976A - Metadata repairing method, device, equipment and medium - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a metadata repairing method, a device, equipment and a medium, comprising the following steps: scanning all subdirectories and files under a target directory to obtain corresponding first inode information; checking the directory structure, the index nodes and the directory attributes based on the first inode information to obtain a corresponding checking result; and performing metadata repair based on the verification result. That is, the present application may perform verification for the directory structure, the index node, and the directory attribute by scanning the target directory, and then perform metadata repair based on the verification result. Therefore, the consistency of the metadata can be maintained, frequent alarms are avoided, and user experience is improved.
Description
Technical Field
The present application relates to the field of distributed file system technologies, and in particular, to a method, an apparatus, a device, and a medium for metadata repair.
Background
At present, when Metadata is damaged, a cluster can generate an alarm 'Metadata dataprotected', the stability of a product and the normal use of a client are seriously influenced, in the current solution, a datamon command is used for deleting a datage item, the problem is not solved, the field environment of the client is complex due to the existence of mass data in a file system, when damaged or lost Metadata is accessed again, the alarm can still be generated again, and the problem that partial Metadata information is inconsistent in the use process of the client can exist.
Disclosure of Invention
In view of this, an object of the present application is to provide a method, an apparatus, a device, and a medium for repairing metadata, which can maintain consistency of metadata and avoid frequent alarms, thereby improving user experience. The specific scheme is as follows:
in a first aspect, the present application discloses a metadata repair method, including:
scanning all subdirectories and files under a target directory to obtain corresponding first inode information;
checking the directory structure, the index nodes and the directory attributes based on the first inode information to obtain a corresponding checking result;
and performing metadata repair based on the verification result.
Optionally, the checking for the directory structure based on the first inode information includes:
constructing a corresponding first directory structure based on the first inode information;
comparing the first directory structure with the second directory structure; wherein the second directory structure is a directory structure extracted from a metadata pool.
Optionally, the performing metadata repair based on the verification result includes:
and if the first directory structure is inconsistent with the second directory structure, covering the second directory structure in the metadata pool by using the first directory structure.
Optionally, performing a check on an index node based on the first inode information includes:
comparing the first inode information with the second inode information;
wherein the second inode information is inode information extracted from a metadata pool.
Optionally, the checking for the directory attribute based on the first inode information includes:
determining first catalog statistics based on the first inode information;
comparing the first catalog statistical information with the second catalog statistical information;
the second catalog statistical information is pre-stored catalog statistical information;
correspondingly, the metadata repair based on the verification result includes:
and if the first directory statistical information is inconsistent with the second directory statistical information, modifying the second directory statistical information by using the first directory statistical information.
Optionally, the method further includes:
checking inodable by using the first inode information;
wherein, the inodetable includes an available index node number.
Optionally, the scanning all the sub-directories and files under the target directory includes:
and scanning all the subdirectories and the files under the target directory based on the sequence of the files and the directory where the files are located.
In a second aspect, the present application discloses a metadata repair apparatus, comprising:
the target directory scanning module is used for scanning all subdirectories and files under the target directory to obtain corresponding first inode information;
the scanning result checking module is used for checking a directory structure, index nodes and directory attributes based on the first inode information to obtain a corresponding checking result;
and the metadata repairing module is used for repairing the metadata based on the verification result.
In a third aspect, the present application discloses an electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the aforementioned metadata repair method.
In a fourth aspect, the present application discloses a computer-readable storage medium for storing a computer program which, when executed by a processor, implements the aforementioned metadata repair method.
Therefore, all subdirectories and files under a target directory are scanned to obtain corresponding first inode information, then verification aiming at the directory structure, the index nodes and the directory attributes is carried out based on the first inode information to obtain corresponding verification results, and then metadata repair is carried out based on the verification results. That is, the present application may perform verification for the directory structure, the index node, and the directory attribute by scanning the target directory, and then perform metadata repair based on the verification result. Therefore, the consistency of the metadata can be maintained, frequent alarms are avoided, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a metadata repair method disclosed herein;
FIG. 2 is a flow chart of a particular metadata repair method disclosed herein;
FIG. 3 is a schematic diagram of a concrete directory tree structure disclosed herein;
FIG. 4 is a schematic structural diagram of a metadata recovery apparatus according to the present disclosure;
fig. 5 is a block diagram of an electronic device disclosed in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
At present, when Metadata is damaged, a cluster can generate an alarm 'Metadata dataprotected', the stability of a product and the normal use of a client are seriously influenced, in the current solution, a datamon command is used for deleting a datage item, the problem is not solved, the field environment of the client is complex due to the existence of mass data in a file system, when damaged or lost Metadata is accessed again, the alarm can still be generated again, and the problem that partial Metadata information is inconsistent in the use process of the client can exist. Therefore, the metadata repairing scheme is provided, the consistency of the metadata can be maintained, frequent alarms are avoided, and therefore user experience is improved.
Referring to fig. 1, an embodiment of the present application discloses a metadata repair method, including:
step S11: and scanning all subdirectories and files under the target directory to obtain corresponding first inode information.
In particular embodiments, all subdirectories and files under the root directory or subdirectories may be scanned. And, the obtained iNode information may include iNode, file creation time, file modification time, and the like.
Step S12: and checking the directory structure, the index node and the directory attribute based on the first inode information to obtain a corresponding checking result.
Step S13: and performing metadata repair based on the verification result.
In a specific embodiment, the checking for the directory structure based on the first inode information includes: constructing a corresponding first directory structure based on the first inode information; comparing the first directory structure with the second directory structure; wherein the second directory structure is a directory structure extracted from a metadata pool.
Correspondingly, the metadata repair based on the verification result includes: and if the first directory structure is inconsistent with the second directory structure, covering the second directory structure in the metadata pool by using the first directory structure.
Specifically, directory structures of the same inode are compared, and after a first directory result is placed into a metadata pool, namely a disk is dropped to cover the error directory structure, the completion of the repair of the directory structure is marked. And the disk is dropped according to the poold, namely the metadata pool identification.
In a specific embodiment, the checking for the index node based on the first inode information includes: comparing the first inode information with the second inode information; wherein the second inode information is inode information extracted from a metadata pool.
If the first inode information does not match the second inode information, corresponding error information is output.
In a specific embodiment, the checking for the directory attribute based on the first inode information includes: determining first catalog statistics based on the first inode information; comparing the first catalog statistical information with the second catalog statistical information; and the second catalog statistical information is prestored catalog statistical information.
In particular, the first directory statistics may be determined by a directory entry. The directory entry is a directory or a file.
The second directory statistical information may be statistical information stored in a metadata pool or a memory.
Correspondingly, the metadata repair based on the verification result includes:
and if the first directory statistical information is inconsistent with the second directory statistical information, modifying the second directory statistical information by using the first directory statistical information.
The first directory statistical information comprises directory fragment statistical information and directory statistical information, the directory fragment statistical information comprises the directory fragment statistical information and the directory fragment recursion statistical information of the layer, and the directory statistical information comprises the directory statistical information and the directory recursion statistical information of the layer.
It should be noted that when the directory entry under the directory exceeds a certain value, the directory fragmentation is performed.
That is, in the embodiment of the present application, the original statistical information dirstat, directory recursion statistical information rstat, directory fragment statistical information frag _ info _ t, and directory fragment recursion statistical information nest _ ino _ t of the layer of directory may be repaired based on the scanning result.
Further, the snapshot domain may be checked based on the scanning result, that is, the snapshot domain may be checked according to the embodiment of the present application, where the contents of the scanned file or directory, such as a directory structure (backup), an index node (inode), a directory (dir), and a snapshot domain (snapshot), may be checked.
And, if the repair is not successful, error information is recorded.
Further, in the embodiment of the present application, inodable may also be checked by using the first inode information; wherein, the inodetable includes an available index node number. Initially, all index numbers are available.
Specifically, if the scanned inode number is available in the inotable (i.e., the inode number may be allocated to other files or directories), the inode number is repaired by removing the inode number from the available inode set in the inotable and taking the available inode set to disk.
Therefore, in the embodiment of the application, all the subdirectories and files under the target directory are scanned to obtain the corresponding first inode information, then the directory structure, the index node and the directory attribute are checked based on the first inode information to obtain the corresponding check result, and then the metadata is repaired based on the check result. That is, in the embodiment of the present application, the target directory may be scanned to check the directory structure, the index node, and the directory attribute, and then metadata repair may be performed based on the check result. Therefore, the consistency of the metadata can be maintained, frequent alarms are avoided, and user experience is improved.
Referring to fig. 2, an embodiment of the present application discloses a specific metadata repair method, which is characterized by including:
step S21: and scanning all the subdirectories and the files under the target directory based on the sequence of the files and the directory where the files are located.
Specifically, in a scanning mode similar to the depth-first principle, scanning is performed from the bottommost file to the top, the files under the directory are preferentially scanned, and when the files under the directory are completely scanned, the directory is scanned.
In a specific embodiment, in the scanning process, an index node may be added to the preset set, and the index node may be taken out from the preset set for scanning. The preset set is used for recording index nodes of files or directories to be scanned.
For example, while adding an inode to an inode _ stack (an inode for recording all files or directories to be scanned in the inode _ stack) during scanning, the inode may be taken out of the inode _ stack and scanned, and all index nodes are added to the inode _ stack once after scanning is completed, and the inode _ stack set is empty.
For example, referring to fig. 3, fig. 3 is a specific directory tree structure diagram disclosed in this embodiment of the application, and the order in which inodes of a file or a directory are added to an inode _ stack set is, in turn, 1- >2- >3- >4- >5- >6- >9- >10- >7- >12- >8- >13- > 14;
the scanning order of the files or directories is: 9-10- >5- >6- >2- >12- >7- >3- >13- >14- >8- >4- > 1.
Step S22: and checking the directory structure, the index node and the directory attribute based on the first inode information to obtain a corresponding checking result.
Step S23: and performing metadata repair based on the verification result.
Referring to fig. 4, an embodiment of the present application discloses a metadata repair apparatus, including:
the target directory scanning module 11 is configured to scan all subdirectories and files under a target directory to obtain corresponding first inode information;
a scanning result checking module 12, configured to perform checking on a directory structure, an index node, and a directory attribute based on the first inode information to obtain a corresponding checking result;
and a metadata repairing module 13, configured to repair metadata based on the verification result.
Therefore, in the embodiment of the application, all the subdirectories and files under the target directory are scanned to obtain the corresponding first inode information, then the directory structure, the index node and the directory attribute are checked based on the first inode information to obtain the corresponding check result, and then the metadata is repaired based on the check result. That is, in the embodiment of the present application, the target directory may be scanned to check the directory structure, the index node, and the directory attribute, and then metadata repair may be performed based on the check result. Therefore, the consistency of the metadata can be maintained, frequent alarms are avoided, and user experience is improved.
The scanning result checking module 12 is specifically configured to construct a corresponding first directory structure based on the first inode information; comparing the first directory structure with the second directory structure; wherein the second directory structure is a directory structure extracted from a metadata pool.
Correspondingly, the metadata repair module 13 is specifically configured to, if the first directory structure is inconsistent with the second directory structure, cover the second directory structure in the metadata pool with the first directory structure.
In a specific embodiment, the scan result checking module 12 is specifically configured to compare the first inode information with the second inode information; wherein the second inode information is inode information extracted from a metadata pool.
In a specific embodiment, the scan result checking module 12 is specifically configured to determine first directory statistical information based on the first inode information; comparing the first catalog statistical information with the second catalog statistical information; and the second catalog statistical information is prestored catalog statistical information.
Correspondingly, the metadata repairing module 13 is specifically configured to modify the second directory statistical information by using the first directory statistical information if the first directory statistical information is inconsistent with the second directory statistical information.
The scanning result checking module 12 is further configured to check inodetable by using the first inode information; wherein, the inodetable includes an available index node number.
The target directory scanning module 11 is specifically configured to scan all the subdirectories and files in the target directory based on the files and the sequence of the directories where the files are located.
Referring to fig. 5, an embodiment of the present application discloses an electronic device 20, which includes a processor 21 and a memory 22; wherein, the memory 22 is used for saving computer programs; the processor 21 is configured to execute the computer program to implement the following steps:
scanning all subdirectories and files under a target directory to obtain corresponding first inode information; checking the directory structure, the index nodes and the directory attributes based on the first inode information to obtain a corresponding checking result; and performing metadata repair based on the verification result.
Therefore, in the embodiment of the application, all the subdirectories and files under the target directory are scanned to obtain the corresponding first inode information, then the directory structure, the index node and the directory attribute are checked based on the first inode information to obtain the corresponding check result, and then the metadata is repaired based on the check result. That is, in the embodiment of the present application, the target directory may be scanned to check the directory structure, the index node, and the directory attribute, and then metadata repair may be performed based on the check result. Therefore, the consistency of the metadata can be maintained, frequent alarms are avoided, and user experience is improved.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: constructing a corresponding first directory structure based on the first inode information; comparing the first directory structure with the second directory structure; wherein the second directory structure is a directory structure extracted from a metadata pool.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: and if the first directory structure is inconsistent with the second directory structure, covering the second directory structure in the metadata pool by using the first directory structure.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: comparing the first inode information with the second inode information; wherein the second inode information is inode information extracted from a metadata pool.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: determining first catalog statistics based on the first inode information; comparing the first catalog statistical information with the second catalog statistical information; the second catalog statistical information is pre-stored catalog statistical information; and if the first directory statistical information is inconsistent with the second directory statistical information, modifying the second directory statistical information by using the first directory statistical information.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: checking inodable by using the first inode information; wherein, the inodetable includes an available index node number.
In this embodiment, when the processor 21 executes the computer subprogram stored in the memory 22, the following steps may be specifically implemented: and scanning all the subdirectories and the files under the target directory based on the sequence of the files and the directory where the files are located.
The memory 22 is used as a carrier for resource storage, and may be a read-only memory, a random access memory, a magnetic disk or an optical disk, and the storage mode may be a transient storage mode or a permanent storage mode.
In addition, the electronic device 20 further includes a power supply 23, a communication interface 24, an input-output interface 25, and a communication bus 26; the power supply 23 is configured to provide an operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and an external device, and a communication protocol followed by the communication interface is any communication protocol applicable to the technical solution of the present application, and is not specifically limited herein; the input/output interface 25 is configured to obtain external input data or output data to the outside, and a specific interface type thereof may be selected according to a specific application requirement, which is not specifically limited herein.
Further, an embodiment of the present application also discloses a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the metadata recovery method disclosed in the foregoing embodiment.
For the specific process of the metadata repairing method, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The metadata repair method, apparatus, device and medium provided by the present application are introduced in detail above, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method of metadata repair, comprising:
scanning all subdirectories and files under a target directory to obtain corresponding first inode information;
checking the directory structure, the index nodes and the directory attributes based on the first inode information to obtain a corresponding checking result;
and performing metadata repair based on the verification result.
2. The metadata repair method according to claim 1, wherein performing a check for a directory structure based on the first inode information comprises:
constructing a corresponding first directory structure based on the first inode information;
comparing the first directory structure with the second directory structure; wherein the second directory structure is a directory structure extracted from a metadata pool.
3. The method according to claim 2, wherein the performing metadata repair based on the verification result includes:
and if the first directory structure is inconsistent with the second directory structure, covering the second directory structure in the metadata pool by using the first directory structure.
4. The metadata repair method according to claim 1, wherein performing a check for an index node based on the first inode information comprises:
comparing the first inode information with the second inode information;
wherein the second inode information is inode information extracted from a metadata pool.
5. The metadata repair method according to claim 1, wherein performing a check for a directory attribute based on the first inode information comprises:
determining first catalog statistics based on the first inode information;
comparing the first catalog statistical information with the second catalog statistical information;
the second catalog statistical information is pre-stored catalog statistical information;
correspondingly, the metadata repair based on the verification result includes:
and if the first directory statistical information is inconsistent with the second directory statistical information, modifying the second directory statistical information by using the first directory statistical information.
6. The metadata repair method according to claim 1, further comprising:
checking inodable by using the first inode information;
wherein, the inodetable includes an available index node number.
7. The metadata recovery method according to any one of claims 1 to 6, wherein the scanning all sub-directories and files under the target directory comprises:
and scanning all the subdirectories and the files under the target directory based on the sequence of the files and the directory where the files are located.
8. A metadata repair apparatus, comprising:
the target directory scanning module is used for scanning all subdirectories and files under the target directory to obtain corresponding first inode information;
the scanning result checking module is used for checking a directory structure, index nodes and directory attributes based on the first inode information to obtain a corresponding checking result;
and the metadata repairing module is used for repairing the metadata based on the verification result.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the metadata repair method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium for storing a computer program which, when executed by a processor, implements the metadata repair method according to any one of claims 1 to 7.
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