CN111966701A - Metadata updating method, device, equipment and storage medium - Google Patents
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/23—Updating
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
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Abstract
The application relates to a metadata updating method, a metadata updating device, metadata updating equipment and a storage medium. The method comprises the following steps: receiving a plurality of operation instructions for the metadata object, and determining whether the content of the metadata object changes according to the plurality of operation instructions; if the content of the metadata object changes, canceling to modify the metadata object, acquiring modified content and recording the modified content into a nonvolatile memory, and continuously monitoring a preset trigger condition; and if the preset trigger condition is reached, updating the metadata object by using the modified content in the nonvolatile storage. The method and the device determine whether the content of the metadata object changes by using the operation instruction, cancel modification of the metadata object when the content of the metadata object changes, record the modified content into the nonvolatile storage, and update the metadata object by using the record of the nonvolatile storage after the preset trigger condition is reached, thereby reducing the update times of the metadata object, improving the efficiency of batch operation, and ensuring the service quality and experience of the storage array.
Description
Technical Field
The present application relates to the field of storage, and in particular, to a method, an apparatus, a device, and a storage medium for updating metadata.
Background
The storage array can provide a larger data storage space, and in order to ensure that reliable and safe data storage service, fast and efficient data access service, flexible space management service, and high-value-added services such as deduplication, compression, snapshot, remote copy, double live and the like are provided, management of various types of metadata is inevitably required; each host write, delete, etc. operation can cause changes to multiple metadata objects therein, and managing such metadata must ensure consistency between the contents of the associated metadata objects. Currently, the existing metadata updating method is to update the metadata immediately after performing serial or parallel operations, but this method has very low efficiency and directly affects the quality and experience of the service provided by the array.
Disclosure of Invention
In view of the above, it is desirable to provide a metadata updating method, apparatus, device and storage medium.
According to an aspect of the present invention, there is provided a metadata update method, the method including:
receiving a plurality of operation instructions for the metadata object, and determining whether the content of the metadata object changes according to the plurality of operation instructions;
if the content of the metadata object changes, canceling to modify the metadata object, acquiring modified content and recording the modified content into a nonvolatile memory, and continuously monitoring a preset trigger condition;
and if the preset trigger condition is reached, updating the metadata object by using the modified content in the nonvolatile storage.
In one embodiment, the method further comprises:
acquiring a metadata object;
and dividing the metadata object into a preset number of sub-objects, wherein the operation instruction takes each sub-object as a unit.
In one embodiment, the receiving a plurality of operation instructions for the metadata object and determining whether the content of the metadata object changes according to the operation instructions
Receiving a plurality of parallel operation instructions;
and determining whether the content of each sub-object is changed according to the plurality of parallel operation instructions.
In one embodiment, the step of canceling the modification of the metadata object and acquiring the modified content and recording the modified content in the nonvolatile storage if the content of the metadata object changes includes:
and if a certain parallel operation instruction corresponds to the content change of a certain sub-object, canceling to modify the certain sub-object, acquiring the change content of the certain sub-object and recording the change content in the nonvolatile storage.
In one embodiment, the method further comprises starting timing or counting the number of changes of the content of the plurality of sub-objects;
if the preset trigger condition is reached, the step of updating the metadata object by using the modified content in the nonvolatile storage comprises the following steps:
if the timing reaches the preset time length, updating the corresponding sub-object by using the modified content in the nonvolatile storage; or
And if the content change times reach a preset value, updating the corresponding sub-object in the metadata by using the modified content in the nonvolatile storage.
In one embodiment, the method further comprises:
and if abnormal power failure occurs and the power supply is recovered, immediately recovering the record in the nonvolatile storage, and updating the metadata object by using the record.
In one embodiment, the metadata object includes at least one of mapping metadata between a LUN space and a storage pool space composed of a plurality of hard disks in an array, host data deduplication fingerprints, and mapping metadata of locations of data stored in the storage pool, physical address space allocation status metadata in the storage pool, and mapping relationship metadata of physical addresses in the storage pool to specific locations of the hard disks.
According to still another aspect of the present invention, there is provided a metadata updating apparatus, the apparatus including:
the receiving module is used for receiving an operation instruction of the metadata object and determining whether the content of the metadata object changes or not according to the operation instruction;
the recording module is used for canceling the modification of the metadata object, acquiring modified content and recording the modified content into the nonvolatile storage when the content of the metadata object changes, and continuously monitoring a preset trigger condition;
and the updating module is used for updating the metadata object by utilizing the modified content in the nonvolatile storage when a preset trigger condition is reached.
According to still another aspect of the present invention, there is also provided a computer apparatus including: at least one processor; and
a memory storing a computer program operable on the processor, the processor performing the aforementioned metadata update method when executing the program.
According to still another aspect of the present invention, there is also provided a computer-readable storage medium storing a computer program which, when executed by a processor, performs the aforementioned metadata updating method.
According to the metadata updating method, the device, the equipment and the storage medium, whether the content of the metadata object changes is determined by using the operation instruction, the metadata object is not modified when the content of the metadata object changes, the modified content is recorded into the nonvolatile storage, and the metadata object is updated by using the record of the nonvolatile storage after the preset trigger condition is reached, so that the updating times of the metadata object are reduced, the efficiency of batch operation is improved, and the service quality and experience of the storage array are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a flow chart of a metadata update method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a metadata update method in accordance with another embodiment of the present invention;
FIG. 3 is a diagram illustrating a metadata updating apparatus according to another embodiment of the present invention;
fig. 4 is an internal structural view of a computer device according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In an embodiment, referring to fig. 1, a metadata updating method is provided, and specifically the method includes the following steps:
s200, receiving a plurality of operation instructions for the metadata object, and determining whether the content of the metadata object changes according to the operation instructions.
The operation instruction can be parallel operation or serial operation; the plurality of operation instructions may be a plurality of serial operations, a plurality of parallel operations, or a combination of serial or parallel operations.
S400, if the content of the metadata object changes, the metadata object is cancelled to be modified, the modified content is obtained and recorded in a nonvolatile memory, and the preset trigger condition is continuously monitored.
The change of the content of the metadata object means that the metadata object needs to be updated corresponding to the operation instruction, and the cancellation of modifying the metadata object means that the modified content is cancelled to be recorded in the metadata object.
S600, if a preset trigger condition is reached, updating the metadata object by using the modified content in the nonvolatile storage.
According to the metadata updating method, whether the content of the metadata object changes is determined by the operation instruction, the metadata object is not modified when the content of the metadata object changes, the modified content is recorded in the nonvolatile storage, and the metadata object is updated by the record of the nonvolatile storage after the preset trigger condition is met, so that the updating times of the metadata object are reduced, the efficiency of batch operation is improved, and the service quality and experience of the storage array are guaranteed.
In another embodiment, the metadata updating method provided by the present invention further includes the following steps:
s110, acquiring a metadata object; the metadata object may be any kind of metadata or combination of various kinds of metadata in the existing storage array, and it is understood that other kinds of metadata generated according to the change of the service type may also be used as the metadata object.
Preferably, the metadata object includes at least one of mapping metadata between LUN space and storage pool space composed of multiple hard disks in the array, mapping metadata of host data deduplication fingerprints and data storage locations in the storage pool, physical address space allocation status metadata in the storage pool, and mapping relationship metadata from physical addresses in the storage pool to specific locations of the hard disks, such as LBA- > PBA mapping metadata, PBA- > LBA mapping metadata, HASH- > PBA mapping metadata, PBA- > HASH mapping metadata, PBA space allocation status metadata in the storage pool, mapping relationship metadata from PBA in the storage pool to specific locations of the hard disks, and the like.
And S120, dividing the metadata object into a preset number of sub-objects, wherein the operation instruction takes each sub-object as a unit. Preferably, the partitioning of the metadata object is done in equal parts, with each sub-object managing the same amount of metadata object content.
In another embodiment, the foregoing step S200 specifically includes the following sub-steps:
s210, receiving a plurality of parallel operation instructions;
and S220, determining whether the content of each sub-object changes according to the plurality of parallel operation instructions.
Preferably, the step S400 specifically includes:
and if a certain parallel operation instruction corresponds to the content change of a certain sub-object, canceling to modify the certain sub-object, acquiring the change content of the certain sub-object and recording the change content in the nonvolatile storage.
In another embodiment, the metadata updating method provided by the present invention further includes: starting timing or counting the content change times of a plurality of sub-objects;
specifically, the step S600 includes the following sub-steps:
s610, if the timing reaches the preset time length, updating the corresponding sub-object by using the modified content in the nonvolatile storage; or
S620, if the content change times reaches a preset value, updating the corresponding sub-object in the metadata by using the modified content in the nonvolatile storage.
Preferably, the method further comprises: and if abnormal power failure occurs and the power supply is recovered, immediately recovering the record in the nonvolatile storage, and updating the metadata object by using the record.
In another embodiment, referring to fig. 2, an implementation process of a metadata updating method according to the present invention is as follows:
s710, each metadata object is divided into a preset number of sub-objects.
Suppose for a metadata object A with 100 data, the metadata object A is split into a first sub-object A1, a second sub-object A2, a third sub-object A3, and a fourth sub-object A4, e.g., the first sub-object A1 manages the 1 st through 25 th data, the second sub-object A2 manages the 2 nd through 26 th data, the third sub-object A3 manages the 51 th through 75 th data, and the fourth sub-object A4 manages the 76 th through 100 th data. Any operation in 1-25 data is an operation corresponding to the first sub-object a1, each sub-object is only responsible for data of a part of the metadata object, and different sub-objects may not be operated, so that the operation concurrence can be increased to some extent.
S720, receiving a plurality of operations taking each sub-object as a unit, if the content of the sub-object needs to be updated in each operation, not directly updating the sub-object, but recording the content needing to be modified into a nonvolatile memory, namely, the sub-object does not need to be really modified, so that the operation path of metadata modification is relatively shortened, and the efficiency of modifying the metadata at one time is improved.
For example, if the received operations are used to modify the contents of the first, second, and third sub-objects a1, a2, and A3, the content corresponding to the metadata is not directly changed, but the modified contents of the first, second, and third sub-objects a1, and A3 are recorded in the non-volatile storage.
And S730, regularly updating the record in the non-volatile memory to the corresponding child object. When the timing reaches the set time length, the first sub-object a1, the second sub-object a2, and the third sub-object A3 are updated together with the record in the nonvolatile storage; if the current timing does not reach the set duration, step S720 is executed to determine the modified content of the sub-object machine that needs to be modified in the next batch operation, although the modification in different batches still needs to be serialized if the same sub-object is modified, more content is updated in batches each time, which is much more efficient than modifying the sub-object or modifying the metadata directly.
S740, the operations of step S720 and step S730 are performed in a loop.
S750, if abnormal power failure occurs in the implementation process, rapidly recovering the record in the nonvolatile memory when the failure is recovered, and continuously executing the operation of the step S730; therefore, data can not be lost under the condition of abnormal power failure, the previous record can be quickly recovered, and the reliability of metadata modification is ensured.
The metadata updating method can greatly improve the concurrency of metadata operation, shorten the path of the metadata operation and reduce the times of updating the object, thereby improving the efficiency of metadata modification operation.
In another embodiment, referring to fig. 3, there is provided a metadata updating apparatus 80, including:
a receiving module 81, configured to receive an operation instruction for a metadata object, and determine whether content of the metadata object changes according to the operation instruction;
the recording module 82 is configured to cancel modifying the metadata object, obtain modified content and record the modified content in the nonvolatile storage, and continuously monitor a preset trigger condition when the content of the metadata object changes;
and the updating module 83 is configured to update the metadata object with the modified content in the nonvolatile storage when a preset trigger condition is reached.
It should be noted that, for the specific definition of a metadata updating apparatus, reference may be made to the above definition of a metadata updating method, and details are not described herein again. The respective modules in the above-described one type of metadata update apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 4. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a metadata update method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 4 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
According to yet another aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the metadata update method described above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of metadata update, the method comprising:
receiving a plurality of operation instructions for the metadata object, and determining whether the content of the metadata object changes according to the plurality of operation instructions;
if the content of the metadata object changes, canceling to modify the metadata object, acquiring modified content and recording the modified content into a nonvolatile memory, and continuously monitoring a preset trigger condition;
and if the preset trigger condition is reached, updating the metadata object by using the modified content in the nonvolatile storage.
2. The method of claim 1, further comprising:
acquiring a metadata object;
and dividing the metadata object into a preset number of sub-objects, wherein the operation instruction takes each sub-object as a unit.
3. The method of claim 2, wherein receiving a plurality of operation instructions for the metadata object and determining whether the content of the metadata object changes according to the operation instructions
Receiving a plurality of parallel operation instructions;
and determining whether the content of each sub-object is changed according to the plurality of parallel operation instructions.
4. The method of claim 3, wherein the step of canceling the modification of the metadata object and obtaining the modified content and recording the modified content in the nonvolatile storage if the content of the metadata object changes comprises:
and if a certain parallel operation instruction corresponds to the content change of a certain sub-object, canceling to modify the certain sub-object, acquiring the change content of the certain sub-object and recording the change content in the nonvolatile storage.
5. The method of claim 2, further comprising: starting timing or counting the content change times of a plurality of sub-objects;
if the preset trigger condition is reached, the step of updating the metadata object by using the modified content in the nonvolatile storage comprises the following steps:
if the timing reaches the preset time length, updating the corresponding sub-object by using the modified content in the nonvolatile storage; or
And if the content change times reach a preset value, updating the corresponding sub-object in the metadata by using the modified content in the nonvolatile storage.
6. The method of claim 1, further comprising:
and if abnormal power failure occurs and the power supply is recovered, immediately recovering the record in the nonvolatile storage, and updating the metadata object by using the record.
7. The method of claim 1, wherein the metadata object comprises at least one of LUN space mapping metadata between storage pool spaces of a plurality of hard disks in the array, host data deduplication fingerprints, mapping metadata of locations of data stored in the storage pool, physical address space allocation status metadata in the storage pool, and mapping metadata of physical addresses in the storage pool to specific locations of the hard disks.
8. A metadata updating apparatus, characterized in that the apparatus comprises:
the receiving module is used for receiving an operation instruction of the metadata object and determining whether the content of the metadata object changes or not according to the operation instruction;
the recording module is used for canceling the modification of the metadata object, acquiring modified content and recording the modified content into the nonvolatile storage when the content of the metadata object changes, and continuously monitoring a preset trigger condition;
and the updating module is used for updating the metadata object by utilizing the modified content in the nonvolatile storage when the preset trigger condition is reached.
9. A computer device, comprising:
at least one processor; and
a memory storing a computer program operable in the processor, the processor when executing the program performing the method of any of claims 1-7.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010818451.1A CN111966701A (en) | 2020-08-14 | 2020-08-14 | Metadata updating method, device, equipment and storage medium |
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| CN202010818451.1A CN111966701A (en) | 2020-08-14 | 2020-08-14 | Metadata updating method, device, equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419681A (en) * | 2021-06-28 | 2021-09-21 | 苏州浪潮智能科技有限公司 | Storage system deduplication method, system, device and storage medium |
| WO2022188613A1 (en) * | 2021-03-11 | 2022-09-15 | International Business Machines Corporation | Recording changes to records whilst preserving record immutability |
-
2020
- 2020-08-14 CN CN202010818451.1A patent/CN111966701A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188613A1 (en) * | 2021-03-11 | 2022-09-15 | International Business Machines Corporation | Recording changes to records whilst preserving record immutability |
| US11934378B2 (en) | 2021-03-11 | 2024-03-19 | International Business Machines Corporation | Recording changes to records whilst preserving record immutability |
| CN113419681A (en) * | 2021-06-28 | 2021-09-21 | 苏州浪潮智能科技有限公司 | Storage system deduplication method, system, device and storage medium |
| CN113419681B (en) * | 2021-06-28 | 2023-08-04 | 苏州浪潮智能科技有限公司 | Storage system deduplication method, system, device and storage medium |
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Application publication date: 20201120 |