WO2024109236A1

WO2024109236A1 - Metadata check method and system, and computer device and non-volatile readable storage medium

Info

Publication number: WO2024109236A1
Application number: PCT/CN2023/115981
Authority: WO
Inventors: 费卫宏; 白建; 王萌萌
Original assignee: 苏州元脑智能科技有限公司
Priority date: 2022-11-21
Filing date: 2023-08-30
Publication date: 2024-05-30
Also published as: CN115509800B; CN115509800A

Abstract

The present application relates to the technical field of storage. In particular, disclosed are a metadata check method and system, and a computer device and a non-volatile readable storage medium. The method comprises: in response to a hard disk being powered on, partitioning all metadata of the hard disk into blocks, and calculating a first-level initial check value of each block of metadata, so as to obtain a first-level initial check set; performing calculation on the first-level initial check set to obtain a second-level initial check set; starting a first timer, and setting a discrete check cycle; triggering metadata discrete-check logic according to the discrete check cycle, so as to perform a discrete check on the metadata on the basis of the second-level initial check set; and in response to the metadata passing the discrete check, triggering metadata inspection logic, so as to perform inspection on the metadata on the basis of the first-level initial check set. By means of the solution of the present application, metadata can be checked during the operation process of a hard disk, such that abnormal metadata can be found in a timely manner, thereby ensuring the completeness and correctness of data.

Description

Metadata verification method, system, computer device and non-volatile readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to a Chinese patent application filed with the China Patent Office on November 21, 2022, with application number 202211455849.9 and application name “A Metadata Verification Method, System, Computer Device and Storage Medium”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of storage technology, and in particular to a metadata verification method, system, computer device and non-volatile readable storage medium.

Background technique

During the operation of SSD (Solid State Disk or Solid State Drive, SSD for short), key data that needs to be accessed frequently will be loaded into DRAM (Dynamic Random Access Memory). When needed, the memory can be accessed directly, which is very fast and convenient. In current SSD devices, the amount of metadata in the read and write process is relatively large and is always stored in the memory during device operation. As the SSD device runs stably for a long time, the temperature of the SSD device continues to be high. At this time, reading metadata from the memory will cause the following problems:

In terms of software, due to software misoperation or out-of-bounds address access, the metadata in the memory is tampered with, but the metadata user is unaware of it and uses the wrong data, causing the SSD to operate abnormally. At this time, it is difficult to determine whether the metadata itself is incorrect when it is generated, or is mistakenly modified by the software during operation, or is caused by other logical problems. Therefore, it is impossible to quickly locate and solve the problem.

In terms of hardware, when SSD is in harsh environments such as high temperature, long-term operation, and electromagnetic interference, there is a small probability that the data in the memory will change. Under this premise, if the SSD cannot sense that there is a problem with the data, it will still use this data to read and write user data. In the worst case, the data that the user needs to save will be lost and cannot be read. Moreover, after the SSD device has a problem, the development engineer cannot determine which link caused it, and there is no means to determine whether the problem is a business process problem caused by metadata anomalies.

Summary of the invention

In view of this, the present application proposes a metadata verification method, system, computer device and non-volatile readable storage The medium checks the metadata during the operation of the hard disk, so as to detect abnormal metadata in time to ensure the completeness and correctness of the data; and by adopting discrete verification and hierarchical verification methods, it reduces the CPU (Central Processing Unit) occupancy rate during the verification process to avoid affecting the operation speed of the main business of the hard disk.

Based on the above purpose, one aspect of an embodiment of the present application provides a metadata verification method, comprising the following steps:

In response to the hard disk being powered on, all metadata of the hard disk are divided into blocks, and a first-level initial checksum value of each block of metadata is calculated to obtain a first-level initial checksum set;

Calculate the first-level initial check set to obtain the second-level initial check set;

Start the first timer and set the discrete verification period;

Triggering metadata discrete verification logic according to a discrete verification period to perform discrete verification on the metadata based on the secondary initial verification set;

In response to the discrete verification of the metadata passing, the metadata inspection logic is triggered to inspect the metadata based on the first-level initial verification set.

In some embodiments, the method further comprises:

In response to the discrete verification of the metadata failing, a host is notified of the occurrence of a metadata asynchronous event, and the metadata patrol logic is disabled.

In some embodiments, the discrete verification logic includes:

Turn off the first timer;

The metadata is discretely verified based on the secondary initial verification set in each discrete verification cycle.

In some implementations, the metadata patrol logic includes:

Start the second timer and set the inspection cycle;

Calculate the first-level checksum value of each piece of metadata in turn according to the inspection cycle, and verify the first-level checksum value calculated each time based on the corresponding first-level initial checksum value in the initial checksum set;

In response to the metadata verification of all blocks being completed, the second timer is turned off.

In some embodiments, the method further comprises:

After the second timer is closed, the first timer is opened and the metadata inspection logic is exited.

In some implementations, the metadata patrol logic includes:

Start the second timer and set the inspection cycle;

Obtain the current metadata of the hard disk in turn according to the inspection cycle and the divided blocks, and calculate the first-level check value of each block of metadata in turn;

After calculating the first-level checksum value of each piece of metadata, the calculated first-level checksum value is compared with the corresponding first-level initial checksum value in the initial checksum set;

When the first-level check value is consistent with the corresponding first-level initial check value in the initial check set, the step of calculating the first-level check value of each block of metadata in turn according to the inspection cycle is returned to calculate the first-level check value of the next block of metadata.

In some embodiments, the method further comprises:

When the first-level check value is inconsistent with the corresponding first-level initial check value in the initial check set, the second timer is turned off and the metadata inspection logic is disabled.

In some embodiments, the method further comprises:

When the first-level check value is inconsistent with the first-level initial check value corresponding to the initial check set, the occurrence of the metadata asynchronous event is notified to the host, and the second timer is turned off and the metadata patrol logic is disabled.

In some embodiments, the method further comprises:

When the first-level check value is inconsistent with the corresponding first-level initial check value in the initial check set, the information that the current second-level check set is inconsistent with the second-level initial check set is recorded in the log, and the second timer is turned off and the metadata inspection logic is disabled.

In some embodiments, the method further comprises:

In response to the metadata inspection of all blocks being completed, the second timer is turned off, the first timer is turned on, and the metadata inspection logic is exited.

In some implementations, the metadata discrete verification logic includes:

Turn off the first timer;

Obtain the first-level checksum of the metadata of the hard disk at the current time, and calculate the first-level checksum at the current time to obtain the second-level checksum at the current time;

Compare the current secondary checksum with the secondary initial checksum;

When the current secondary check set is consistent with the secondary initial check set, the discrete check of the metadata passes.

In some embodiments, the method further comprises:

When the current secondary check set is inconsistent with the secondary initial check set, the discrete check of the metadata fails.

In some embodiments, the method further comprises:

In response to the discrete verification of the metadata failing, information that the secondary verification set at the current moment is inconsistent with the secondary initial verification set is recorded in the log.

In some embodiments, the method further comprises:

In response to the failure of the discrete verification of metadata, the host is notified of the occurrence of a metadata asynchronous event, and the information that the current secondary verification set is inconsistent with the secondary initial verification set is recorded in the log, and the metadata inspection logic is disabled.

In some implementations, calculating the primary initial checksum for each block of metadata includes:

The first-level initial checksum of each block of metadata is calculated based on the cyclic redundancy check.

In some implementations, calculating the primary initial check set to obtain the secondary initial check set includes:

A cyclic redundancy check is performed on the first-level initial check set to obtain a second-level initial check set.

In some embodiments, the method further comprises:

During the operation of the hard disk, in response to metadata being updated, the first-level initial check value is recalculated based on the updated metadata, and the first-level initial check set and the second-level initial check set are updated based on the recalculated first-level initial check value.

Another aspect of the embodiment of the present application further provides a metadata verification system, including:

A first calculation module, wherein the first calculation module is configured to divide all metadata of the hard disk into blocks in response to the hard disk being powered on, and calculate a first-level initial checksum value of each block of metadata to obtain a first-level initial checksum set;

A second calculation module, the second calculation module is configured to calculate the first-level initial check set to obtain a second-level initial check set;

An opening module, the opening module is configured to open a first timer and set a discrete verification period;

A discrete verification module, the discrete verification module is configured to trigger a metadata discrete verification logic according to a discrete verification period to perform a discrete verification on the metadata based on the secondary initial verification set;

The inspection module is configured to trigger the metadata inspection logic to inspect the metadata based on the first-level initial inspection set in response to the discrete verification of the metadata passing.

According to another aspect of the embodiments of the present application, a computer device is provided, including: at least one processor; and a memory, wherein the memory stores a computer program executable on the processor, and the steps of the above method are implemented when the computer program is executed by the processor.

According to another aspect of the embodiments of the present application, a non-volatile readable storage medium is provided, which stores a computer program that implements the above method steps when executed by a processor.

The present application has at least the following beneficial technical effects: by checking the metadata during the operation of the hard disk, abnormal metadata can be discovered in a timely manner, thereby ensuring the completeness and correctness of the data; and by adopting discrete verification and hierarchical verification methods, the CPU occupancy rate during the verification process is reduced to avoid affecting the operating speed of the main business of the hard disk.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will describe the embodiments or the prior art. The drawings required for use in the description are briefly introduced. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

FIG1 is a block diagram of an embodiment of a metadata verification method provided by the present application;

FIG2 is a schematic diagram of an embodiment of a metadata verification system provided by the present application;

FIG3 is a schematic diagram of the structure of a computer device according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of an embodiment of a non-volatile readable storage medium provided in the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the embodiments of the present application are described in detail below in combination with optional embodiments and with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present application are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present application. The subsequent embodiments will not explain this one by one.

Based on the above purpose, the first aspect of the embodiment of the present application proposes an embodiment of a metadata verification method. As shown in FIG1 , it includes the following steps:

S10, in response to the hard disk being powered on, dividing all metadata of the hard disk into blocks, and calculating a first-level initial checksum value of each block of metadata to obtain a first-level initial checksum set;

S20, calculating the first-level initial check set to obtain a second-level initial check set;

S30, start the first timer and set a discrete verification period;

S40, triggering metadata discrete verification logic according to a discrete verification period to perform discrete verification on the metadata based on the secondary initial verification set;

S50 . In response to the metadata discrete verification passing, triggering metadata inspection logic to inspect the metadata based on the first-level initial verification set.

Optionally, during the initialization phase of powering on the hard disk, when generating metadata, the entire block of metadata is processed in blocks, and each block of metadata is verified and calculated, such as CRC (Cyclic Redundancy Check) calculation, and the calculation results are saved in a global array, where the array subscript indicates the corresponding block of metadata, and the array value indicates the first-level initial verification value of the block of metadata. This array is called the first-level initial verification set. Since the smaller the size of each block of metadata, the smaller the discrete time consumed during verification, the smaller the impact on the hard disk performance, but it will increase space consumption. Therefore, the size of each block of metadata is weighed according to the actual situation.

After calculating the initial check value of all metadata, the first-level initial check set is calculated for check calculation, such as CRC calculation, that is, the generated global array check is calculated and saved. This value is called the second-level initial check value; each time the software actively updates the metadata, it only needs to recalculate the first-level initial check set array value corresponding to the block where the current data is located, and then update the corresponding second-level initial check value.

During the operation of the hard disk, a first timer is used to trigger a metadata discrete verification logic, and after the metadata discrete verification logic is triggered, the first timer is turned off; when the metadata discrete verification passes, the metadata inspection logic is triggered; when the metadata discrete verification fails, the metadata asynchronous event is notified to the host, so as to timely detect the abnormality of the metadata, and by reporting the abnormality to the host, developers and maintenance personnel can obtain metadata abnormality information in time, and can improve the troubleshooting efficiency during the operation of the hard disk.

The metadata discrete verification logic can be implemented in the following way: calculate the first-level verification set of the current metadata, and the second-level verification set of the first-level verification set, compare the calculated second-level verification set of the current metadata with the second-level initial verification set, and if the second-level verification set of the current metadata is consistent with the second-level initial verification, the verification passes; if the second-level verification set of the current metadata is inconsistent with the second-level initial verification, the verification fails.

The metadata inspection logic can be implemented in the following way: start the second timer, trigger the verification of each piece of metadata based on the second timer, that is, verify a piece of metadata in each inspection cycle. If the verification passes, continue to verify the next piece of metadata. If the verification fails, notify the host of the metadata asynchronous event. The detailed process of each inspection cycle is as follows:

Calculate the first-level check value of the current metadata and compare it with the corresponding first-level initial check value in the first-level initial check set. If the first-level check value of the current metadata is consistent with the corresponding first-level initial check value in the first-level initial check set, the check passes; if the first-level check value of the current metadata is inconsistent with the corresponding first-level initial check value in the first-level initial check set, the check fails.

The embodiment of the present application checks metadata during the operation of the hard disk, thereby promptly discovering abnormal metadata to ensure the completeness and correctness of the data; and by adopting discrete verification and hierarchical verification methods, reduces the CPU occupancy rate during the verification process to avoid affecting the operation speed of the main business of the hard disk; and by promptly discovering metadata anomalies, improves the troubleshooting efficiency during the operation of the hard disk.

In some embodiments, the method further comprises:

In some embodiments, the discrete verification logic includes:

Turn off the first timer;

In some implementations, the metadata patrol logic includes:

Start the second timer and set the inspection cycle;

Calculate the first-level checksum of each piece of metadata in turn according to the inspection cycle, and verify the first-level checksum calculated each time based on the corresponding first-level initial checksum in the initial checksum set;

In some embodiments, the method further comprises:

In some implementations, the metadata patrol logic includes:

Start the second timer and set the inspection cycle;

In some embodiments, the method further comprises:

In an optional embodiment, the metadata inspection logic is implemented in the following manner:

S11, start the second timer and set the inspection cycle, start the second timer for each inspection cycle The metadata of one block is verified until the metadata of all blocks is verified;

S12, obtaining metadata of a block currently to be verified in the hard disk according to the inspection cycle and the divided blocks, and calculating a primary verification value of the metadata of the block;

S13, comparing the calculated first-level check value with the corresponding first-level initial check value in the initial check set;

S14, when the first-level check value is consistent with the corresponding first-level initial check value in the initial check set, return to step S12 to calculate the first-level check value of the next piece of metadata;

S15, if the primary check value is inconsistent with the corresponding primary initial check value in the initial check set, the host is notified of the occurrence of a metadata asynchronous event, the comparison inconsistency information is recorded in the log, and the second timer is turned off. Metadata inspection logic is disabled;

S16: In response to the metadata inspection of all blocks being completed, the second timer is turned off, the first timer is turned on, and the metadata inspection logic is exited.

Through the above scheme, the metadata is checked during the operation of the hard disk, and abnormal metadata can be discovered in time to ensure the completeness and correctness of the data; and the CPU occupancy rate during the verification process is reduced to avoid affecting the operation speed of the main business of the hard disk; and through the timely discovery of metadata anomalies, the troubleshooting efficiency during the operation of the hard disk is improved.

In some implementations, the metadata discrete verification logic includes:

Turn off the first timer;

Compare the current secondary checksum with the secondary initial checksum;

In some embodiments, the method further comprises:

The first-level initial checksum value of each block of metadata is calculated based on the cyclic redundancy check.

In an optional embodiment, the metadata discrete verification logic is implemented in the following manner:

S21, after the metadata discrete verification logic is triggered, close the first timer;

S22, obtaining a first-level checksum of metadata at the current moment of hard disk operation, and calculating the first-level checksum at the current moment to obtain a second-level checksum at the current moment;

S23, comparing the current secondary check set with the secondary initial check set;

S24: If the current secondary check set is consistent with the secondary initial check set, the discrete check of the metadata passes;

S25. If the current secondary check set is inconsistent with the secondary initial check set, the discrete check of the metadata fails;

S26. In response to the metadata discrete verification failing, the host is notified of the occurrence of a metadata asynchronous event, and the information that the current secondary verification set is inconsistent with the secondary initial verification set is recorded in the log, and the metadata inspection logic is disabled.

Through the above scheme, the metadata is checked during the operation of the hard disk, and abnormal metadata can be discovered in time to ensure the completeness and correctness of the data; and by adopting discrete verification and hierarchical verification methods, the CPU occupancy rate during the verification process is reduced to avoid affecting the operation speed of the main business of the hard disk; and by timely discovering metadata anomalies, the troubleshooting efficiency during the operation of the hard disk is improved.

In some embodiments, the method further comprises:

The following describes an optional implementation of the present application through an optional embodiment.

S110, during the hard disk initialization phase, when generating metadata, the entire metadata is processed in blocks, CRC is calculated for each metadata block, and saved in a global array, the array subscript indicates the corresponding block of data, and the array value indicates the CRC of the block of data, the array is called a first-level CRC set, i.e., a first-level initial checksum set;

S111, after calculating the CRC of all metadata, calculate the CRC of the primary CRC set, that is, calculate the CRC of the array generated in step S110 and save it, which is called the secondary CRC value, that is, the secondary initial check set;

S112, when the device is running, use the first timer to trigger the metadata discrete verification process;

S113, after the metadata discrete verification process is triggered, close the first timer;

S114, first calculate the CRC of the current primary CRC set, that is, the secondary CRC value, and compare it with the secondary CRC value finally calculated in step S111;

S115: If the verification of step S114 is passed, the metadata inspection logic is triggered by the flag bit, the data inspection is started, the second timer is started, and the process goes to step S117;

S116: If the step S114 fails to pass the verification, the asynchronous event is notified to the host, the LOG is recorded, and then the inspection process is disabled;

S117, the second timer triggers metadata check of each block, that is, calculates the CRC check value of a block of metadata, and compares it with the corresponding CRC value saved in the primary CRC set saved in step S110;

S118, if the verification of step S117 is passed, the metadata of the next block is verified, that is, the next data unit is offset, the CPU is released, and the second timer is triggered to enter the next data unit verification;

S119, after all data verification is completed, the second timer is turned off, the first timer is turned on, and the metadata discrete inspection logic is exited;

S120. If the check in step S117 fails, the asynchronous event is notified to the host, a LOG is recorded, the second timer is turned off, and then the inspection process is disabled.

Based on the same inventive concept, according to another aspect of the present application, as shown in FIG2 , an embodiment of the present application further provides a metadata verification system, including:

A first calculation module 110, wherein the first calculation module 110 is configured to divide all metadata of the hard disk into blocks in response to the hard disk being powered on, and calculate a first-level initial checksum value of each block of metadata to obtain a first-level initial checksum set;

A second calculation module 120, the second calculation module 120 is configured to calculate the first-level initial check set to obtain a second-level initial check set;

The start module 130 is configured to start a first timer and set a discrete check period;

A discrete verification module 140, the discrete verification module 140 is configured to trigger a metadata discrete verification logic according to a discrete verification period to perform a discrete verification on the metadata based on the secondary initial verification set;

The inspection module 150 is configured to trigger the metadata inspection logic to inspect the metadata based on the primary initial inspection set in response to the discrete verification of the metadata passing.

In the embodiment of the present application, the metadata is checked during the operation of the hard disk, so as to timely discover abnormal metadata. The completeness and correctness of the data are guaranteed by using discrete verification and hierarchical verification to reduce the CPU usage during the verification process and avoid affecting the running speed of the main business of the hard disk.

The various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure herein may be implemented or executed using the following components designed to perform the functions herein: a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP, and/or any other such configuration.

The steps of the method or algorithm described in conjunction with the disclosure here can be directly included in hardware, in a software module executed by a processor, or in a combination of the two. The software module can reside in a non-volatile readable storage medium of any other form known in the art, such as a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or a non-volatile readable storage medium. An exemplary non-volatile readable storage medium is coupled to a processor so that the processor can read information from the non-volatile readable storage medium or write information to the non-volatile readable storage medium. In an alternative, the non-volatile readable storage medium can be integrated with the processor. The processor and the non-volatile readable storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In an alternative, the processor and the non-volatile readable storage medium can reside in a user terminal as a discrete component.

Based on the same inventive concept, according to another aspect of the present application, as shown in FIG3 , an embodiment of the present application further provides a computer device 30, which includes a processor 310 and a memory 320, wherein the memory 320 stores a computer program 321 that can be run on the processor, and the processor 310 executes the steps of the above method when executing the program.

Among them, the memory, as a non-volatile, non-volatile readable storage medium, can be configured to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions/modules corresponding to the metadata verification method in the embodiment of the present application. The processor executes various functional applications and data processing of the system by running the non-volatile software programs, instructions and modules stored in the memory, that is, the metadata verification method of the above method embodiment is implemented.

The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the system, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the local module via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

Based on the same inventive concept, according to another aspect of the present application, as shown in FIG. 4 , an embodiment of the present application further provides a non-volatile readable storage medium 40 , which stores a computer program 410 that executes the above method when executed by a processor.

Finally, it should be noted that a person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the non-volatile readable storage medium of the program can be a disk, an optical disk, a read-only storage memory (ROM) or a random access memory (RAM), etc. The above-mentioned computer program embodiments can achieve the same or similar effects as the corresponding above-mentioned arbitrary method embodiments.

It will also be appreciated by those skilled in the art that various exemplary logic blocks, modules, circuits and algorithmic steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, a general description has been given to the functions of various schematic components, blocks, modules, circuits and steps. Whether this function is implemented as software or implemented as hardware depends on practical application and the design constraints imposed on the entire system. Those skilled in the art can implement the function in various ways for every practical application, but this implementation decision should not be interpreted as causing a departure from the disclosed scope of the present application embodiment.

The above are exemplary embodiments disclosed in the present application, but it should be noted that various changes and modifications may be made without departing from the scope of the present application disclosed in the claims. The functions, steps and/or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. The serial numbers of the embodiments disclosed in the above-mentioned embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. In addition, although the elements disclosed in the embodiments of the present application may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

It should be understood that, as used herein, the singular forms "a", "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and/or" refers to any and all possible combinations including one or more of the associated listed items.

A person of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present application (including the claims) is limited to these examples; under the concept of the embodiments of the present application, the technical features in the above embodiments or different embodiments may also be combined, and there are many other variations of different aspects of the embodiments of the present application as above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

A metadata verification method, characterized by comprising:

In response to the hard disk being powered on, all metadata of the hard disk are divided into blocks, and a first-level initial check value of each block of metadata is calculated to obtain a first-level initial check set;

Calculating the first-level initial check set to obtain a second-level initial check set;

Start the first timer and set the discrete verification period;

Triggering metadata discrete verification logic according to the discrete verification period to perform discrete verification on the metadata based on the secondary initial verification set;

In response to the discrete verification of the metadata passing, the metadata inspection logic is triggered to inspect the metadata based on the first-level initial verification set.
The method according to claim 1, further comprising:

In response to the discrete verification of the metadata failing, a host is notified of the occurrence of a metadata asynchronous event, and the metadata patrol logic is disabled.
The method according to claim 1, wherein the discrete check logic comprises:

Turning off the first timer;

The metadata is discretely verified based on the secondary initial verification set in each discrete verification period.
The method according to claim 1, wherein the metadata inspection logic comprises:

Start the second timer and set the inspection cycle;

Calculating the first-level check value of each block of metadata in sequence according to the inspection cycle, and verifying the first-level check value obtained each time based on the first-level initial check value corresponding to the initial check set;

In response to the metadata verification of all blocks being completed, the second timer is turned off.
The method according to claim 4, further comprising:

After the second timer is turned off, the first timer is turned on, and the metadata inspection logic is exited.
The method according to claim 1, wherein the metadata inspection logic comprises:

Start the second timer and set the inspection cycle;

Obtaining the current metadata of the hard disk in sequence according to the inspection cycle and the divided blocks, and calculating the primary check value of each block of metadata in sequence;

After calculating each level one check value of a piece of metadata, the calculated level one check value is compared with the corresponding level one initial check value in the initial check set;

When the first-level check value is consistent with the corresponding first-level initial check value in the initial check set, the step of calculating the first-level check value of each block of metadata in turn according to the inspection cycle is returned to calculate the first-level check value of the next block of metadata.
The method according to claim 6, further comprising:

When the first-level check value is inconsistent with the corresponding first-level initial check value in the initial check set, the second timer is turned off and the metadata inspection logic is disabled.
The method according to claim 6, further comprising:

When the first-level check value is inconsistent with the corresponding first-level initial check value in the initial check set, the occurrence of a metadata asynchronous event is notified to the host, and the second timer is turned off and the metadata patrol logic is disabled.
The method according to claim 6, further comprising:

When the first-level check value is inconsistent with the corresponding first-level initial check value in the initial check set, the information that the second-level check set at the current moment is inconsistent with the second-level initial check set is recorded in the log, and the second timer is turned off and the metadata inspection logic is disabled.
The method according to claim 6, further comprising:

In response to the metadata inspection of all blocks being completed, the second timer is turned off, the first timer is turned on, and the metadata inspection logic is exited.
The method according to claim 1, wherein the metadata discrete verification logic comprises:

Turning off the first timer;

Obtaining a first-level checksum of metadata at the current moment of operation of the hard disk, and calculating the first-level checksum at the current moment to obtain a second-level checksum at the current moment;

Comparing the current level 2 check set with the level 2 initial check set;

When the secondary check set at the current moment is consistent with the secondary initial check set, the discrete check of the metadata passes.
The method according to claim 11, further comprising:

When the secondary verification set at the current moment is inconsistent with the secondary initial verification set, the discrete verification of the metadata fails.
The method according to claim 11, further comprising:

In response to the discrete verification of the metadata failing, information that the secondary verification set at the current moment is inconsistent with the secondary initial verification set is recorded in a log.
The method according to claim 11, further comprising:

In response to the discrete verification of the metadata failing, the host is notified of the occurrence of a metadata asynchronous event, the information that the secondary verification set at the current moment is inconsistent with the secondary initial verification set is recorded in a log, and the metadata inspection logic is disabled.
The method according to claim 1, wherein calculating the primary initial checksum value of each block of metadata comprises:

The first-level initial checksum of each block of metadata is calculated based on the cyclic redundancy check.
The method according to claim 1, characterized in that calculating the first-level initial check set to obtain the second-level initial check set comprises:

A cyclic redundancy check calculation is performed on the first-level initial check set to obtain a second-level initial check set.
The method according to claim 1, further comprising:

During the operation of the hard disk, in response to metadata being updated, the first-level initial check value is recalculated based on the updated metadata, and the first-level initial check set and the second-level initial check set are updated based on the recalculated first-level initial check value.
A metadata verification system, characterized by comprising:

a first calculation module, wherein the first calculation module is configured to, in response to the hard disk being powered on, divide all metadata of the hard disk into blocks, and calculate a first-level initial checksum value of each block of metadata to obtain a first-level initial checksum set;

A second calculation module, the second calculation module is configured to calculate the first-level initial check set to obtain a second-level initial check set;

An activation module, wherein the activation module is configured to activate a first timer and set a discrete verification period;

a discrete verification module, the discrete verification module being configured to trigger metadata discrete verification logic according to the discrete verification period to perform discrete verification on the metadata based on the secondary initial verification set;

A patrol module is configured to trigger metadata patrol logic to patrol the metadata based on the first-level initial check set in response to the metadata passing discrete check.
A computer device comprising:

at least one processor; and

A memory storing a computer program executable on the processor, wherein the processor executes the steps of the method according to any one of claims 1 to 17 when executing the program.
A non-volatile readable storage medium storing a computer program, wherein the computer program, when executed by a processor, performs the steps of the method according to any one of claims 1 to 17.