CN112069189B - Method, system, terminal equipment and storage medium for updating multi-level mapping table - Google Patents
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Abstract
The invention discloses a method, a system, a terminal device and a computer storage medium for updating a multi-level mapping table, wherein table updating data aiming at the multi-level mapping table to be updated are obtained; generating a record to be updated according to the table updating data, and storing the record to be updated in a preset data cache; and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data and carrying out chain update on the multi-level mapping table set to be updated. The invention can save the expenditure of time consumption and the occupation of the running memory of the solid-state storage device when the mapping relation of the multi-layer L2P mapping table is updated, and ensure the integral performance of the solid-state storage device on data reading and writing.
Description
Technical Field
The present invention relates to the field of data storage technologies, and in particular, to a method, a system, a terminal device, and a computer storage medium for updating a multi-level mapping table.
Background
In storing source data provided by a data owner (host) in a solid state storage device, a mapping relationship between a logical address of the source data and a physical address of the source data in the solid state storage device is generally established, for example, one or more mapping relationship tables (i.e., L2P mapping tables) are developed, and a mapping relationship between the logical address and the physical address is constructed by storing the logical address and the physical address in the L2P mapping table. As more and more data is stored in the solid state storage device, the storage space required for the L2P mapping table will also become larger and larger. In this way, the L2P mapping table is generally stored in the solid-state storage device as the mapping table at the bottom layer, and a higher-level L2P mapping table is newly built to store the physical address of the mapping table at the bottom layer, thereby forming a multi-level L2P mapping table storage structure.
However, when the mapping relationship between the logical address and the physical address of the source data is constructed based on the storage structure of the multi-level L2P mapping table, if the L2P mapping table needs to be updated, each other L2P mapping table associated with the whole storage structure needs to be updated synchronously (this case is generally defined as a chained update in the data storage), so that when the levels of the L2P mapping tables contained in the storage structure are more, the overhead of querying and updating each L2P mapping table step by step will be very large, so as to affect the overall performance of the solid-state storage device.
To sum up, in the existing way of updating the L2P mapping table in the storage structure of the multi-level L2P mapping table, the update overhead is excessive to affect the overall performance of the solid-state storage device.
Disclosure of Invention
The invention mainly aims to provide a method, a device, a terminal device and a computer storage medium for updating a multi-level mapping table, and aims to solve the technical problem that in the prior art, the overall performance of solid-state storage equipment is influenced due to excessive updating cost in a mode of updating an L2P mapping table in a storage structure of the multi-level L2P mapping table.
In order to achieve the above object, the present invention provides a method for updating a multi-level mapping table, the method for updating a multi-level mapping table comprising:
Acquiring table update data for a multi-level mapping table to be updated;
generating a record to be updated according to the table updating data, and storing the record to be updated in a preset data cache;
and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data and carrying out chain update on the multi-level mapping table set to be updated.
Further, after the step of storing the record to be updated in the preset data cache, the method further includes:
And if the data reading instruction based on the mapping relation table is detected, reading the mapping relation table corresponding to the data reading instruction from the table updating data stored in the data cache so as to perform data reading operation.
Further, the step of generating a record to be updated according to the table update data includes:
Extracting index information of a to-be-updated multi-level mapping table pointed by the table update data;
and packaging the table update data and the index information as a record to be updated.
Further, after the step of storing the record to be updated in a preset data cache, the method includes:
counting the number of records to be updated stored in the data cache;
the critical condition is that the number of the entries reaches a preset number of storage entries, and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data to perform chain update on the multi-level mapping table set to be updated, including:
When the counted number of the storage stripes reaches the preset number of the storage stripes, reading each record to be updated from the data cache;
Extracting the table update data and the index information in each record to be updated, and carrying out chain updating on a target multi-level mapping table set corresponding to the index information based on the table update data, wherein the number of the target multi-level mapping tables to be updated can be multiple.
Further, the index information includes: the table labels and the table physical memory addresses,
The step of performing chained updating on the target to-be-updated multi-level mapping table set corresponding to the index information based on the table updating data includes:
reading a target to-be-updated multi-level mapping table identified by the table label according to the table physical storage address of the index information;
And executing centralized chained updating operation on the target multi-level mapping table to be updated according to the table updating data.
Further, the method further comprises:
And when receiving an updating instruction aiming at the data cache, writing the data cache into a preset solid-state storage device, wherein the updating instruction is automatically triggered or is triggered based on a preset algorithm operation.
Further, after the step of reading each record to be updated to extract the table update data to update the mapping relationship table to be updated, the method further includes:
and clearing the data cache stored and written in the solid-state storage device.
In addition, to achieve the above object, the present invention further provides a system for updating a multi-level mapping table, where the system for updating a multi-level mapping table includes:
the acquisition module is used for acquiring table update data aiming at the mapping relation table to be updated;
The recording module is used for generating a record to be updated according to the table updating data and storing the record to be updated in a preset data cache;
and the updating module is used for reading each record to be updated to extract the table updating data and updating the mapping relation table to be updated when the data cache reaches a preset critical condition.
The functional modules of the updating system of the multi-level mapping table of the present invention implement the steps of the updating method of the multi-level mapping table as described above at runtime.
In addition, to achieve the above object, the present invention also provides a terminal device including: the system comprises a memory, a processor and a multi-level mapping table updating program stored in the memory and capable of running on the processor, wherein the multi-level mapping table updating program realizes the steps of the multi-level mapping table updating method when being executed by the processor.
In addition, to achieve the above object, the present invention also provides a computer storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the method for updating a multi-level mapping table as described above.
The invention provides a method, a system, a terminal device and a computer storage medium for updating a multi-level mapping table, wherein table updating data aiming at the multi-level mapping table to be updated are obtained; generating a record to be updated according to the table updating data, and storing the record to be updated in a preset data cache; and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data and carrying out chain update on the multi-level mapping table set to be updated.
When the multi-level mapping table is updated each time, table updating data of the multi-level mapping table to be updated is obtained, then a record to be updated is generated based on the table updating data, when the mapping relation of the multi-level mapping table is updated each time, the record to be updated generated according to the table updating data is stored in a preset data cache, finally, when the data cache of the record to be updated reaches a preset critical condition, reading each record to be updated from the data storage to extract the table updating data from each record to be updated, and chain updating operation of the multi-level mapping relation is executed according to the multi-level mapping table to be updated designated by the record to be updated in the table updating data set.
Compared with the prior method that when the multi-layer mapping table-multi-layer L2P mapping table needs to be updated every time, the storage structure of the multi-layer mapping table is independently used for inquiring the target multi-layer L2P mapping table which needs to be updated step by step and then executing the updating operation, the method has the advantages that the table updating data which is updated every time aiming at the multi-layer mapping table of the multi-layer L2P mapping table is stored in the cache as one record, the record is read until the cache meets a certain critical condition, so that the chained updating process of the multi-layer mapping relation of the L2P mapping table is executed according to the table updating data set in each record, the expenditure on time consumption and the operation memory occupation of the solid-state storage device is saved to a great extent, and the integral performance of the solid-state storage device on data reading and writing is ensured.
Drawings
Fig. 1 is a schematic structural diagram of hardware operation of a terminal device according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a method for updating a multi-level mapping table according to the present invention;
FIG. 3 is a detailed flowchart of step S300 in an embodiment of a method for updating a multi-level mapping table according to the present invention;
FIG. 4 is a flowchart illustrating a method for updating a multi-level mapping table according to another embodiment of the present invention;
FIG. 5 is a schematic block diagram of a system for updating a multi-level mapping table according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hardware running environment related to a terminal device according to an embodiment of the present invention.
It should be noted that fig. 1 may be a schematic structural diagram of a hardware operating environment of a terminal device. The terminal equipment of the embodiment of the invention can be data storage control terminals, PCs, portable computers and other terminal equipment.
As shown in fig. 1, the terminal device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the terminal device structure shown in fig. 1 is not limiting of the terminal device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in FIG. 1, an operating system, network communications modules, user interface modules, and processing programs for distributed tasks may be included in memory 1005, which is a type of computer storage medium. The operating system is a program for managing and controlling hardware and software resources of the sample terminal device, and supports the running of processing programs of distributed tasks and other software or programs.
In the terminal device shown in fig. 1, the user interface 1003 is mainly used for data communication with each terminal; the network interface 1004 is mainly used for connecting a background server and carrying out data communication with the background server; and the processor 1001 may be configured to call an update program of the multi-level mapping table stored in the memory 1005, and perform the following operations:
Acquiring table update data for a multi-level mapping table to be updated;
generating a record to be updated according to the table updating data, and storing the record to be updated in a preset data cache;
and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data and carrying out chain update on the multi-level mapping table set to be updated.
Further, the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and after performing storing the record to be updated in a preset data cache, further perform the following operations:
And if the data reading instruction based on the mapping relation table is detected, reading the mapping relation table corresponding to the data reading instruction from the table updating data stored in the data cache so as to perform data reading operation.
Further, the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and further perform the following operations:
Extracting index information of a to-be-updated multi-level mapping table pointed by the table update data;
and packaging the table update data and the index information as a record to be updated.
Further, the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and after performing storing the record to be updated in a preset data cache, further perform the following operations:
counting the number of records to be updated stored in the data cache;
The critical condition is that the number of the entries reaches a preset number of stored entries, and the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and further perform the following operations:
When the counted number of the storage stripes reaches the preset number of the storage stripes, reading each record to be updated from the data cache;
Extracting the table update data and the index information in each record to be updated, and carrying out chain updating on a target multi-level mapping table set corresponding to the index information based on the table update data, wherein the number of the target multi-level mapping tables to be updated can be multiple.
Further, the index information includes: table index and table physical memory address, the processor 1001 may call the update program of the multi-level mapping table stored in the memory 1005, and also perform the following operations:
reading a target to-be-updated multi-level mapping table identified by the table label according to the table physical storage address of the index information;
And executing centralized chained updating operation on the target multi-level mapping table to be updated according to the table updating data.
Further, the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and further perform the following operations:
And when receiving an updating instruction aiming at the data cache, writing the data cache into a preset solid-state storage device, wherein the updating instruction is automatically triggered or is triggered based on a preset algorithm operation.
Further, the processor 1001 may call an update program of the multi-level mapping table stored in the memory 1005, and after executing reading each record to be updated to extract the table update data to update the mapping relation table to be updated, further execute the following operations:
and clearing the data cache stored and written in the solid-state storage device.
Based on the above structure, various embodiments of the update method of the multi-level mapping table of the present invention are presented.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for updating a multi-level mapping table according to a first embodiment of the present invention.
The embodiments of the present invention provide embodiments of a method of updating a multi-level mapping table, it being noted that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different than that shown or described herein.
The method for updating the multi-level mapping table in the embodiment of the invention is applied to the terminal equipment for controlling the data storage, and the terminal equipment in the embodiment of the invention can be terminal equipment such as a data storage control terminal, a PC, a portable computer and the like, and is not particularly limited.
The updating method of the multi-level mapping table of the embodiment comprises the following steps:
step S100, obtaining table update data for a multi-level mapping table to be updated;
When the current terminal equipment detects an operation instruction for updating the multi-level mapping relation table-multi-layer L2P mapping table (for convenience of description and understanding, the multi-layer L2P mapping table is uniformly used for replacing the mapping relation table in the following description), the current terminal equipment immediately acquires table updating data for updating the multi-layer L2P mapping table from the operation instruction.
It should be noted that, in this embodiment, the operation instruction may be specifically an instruction triggered by the operator to input the update content based on the user graphical interface visually output by the front end, where the instruction encapsulates the update content for updating the L2P mapping table, which is carried with the input by the operator, and after detecting the operation instruction, the current terminal device analyzes the operation instruction to extract the update content as table update data for the L2P mapping table.
Further, in this embodiment, the update data of the table for the multi-layer L2P mapping table, that is, the update content encapsulated in the operation instruction triggered based on the operator input operation, may specifically be the update of the mapping relationship between the logical address of the data stored in the multi-layer L2P mapping table and the physical address of the data in the solid-state storage device, for example, the update of the physical address of the replacement data in the solid-state storage device, or the update content may also be the update and replacement of the physical address of the L2P mapping table for each layer of the multi-layer L2P mapping table in the solid-state storage device, which should be understood that, based on different design needs of the practical application, in other embodiments, the update content of the multi-layer L2P mapping table input by the operator may of course also be other data content.
Further, in this embodiment, the solid-state storage device may specifically be a Nand-flash (Nand memory, one of memory memories).
Specifically, for example, when a worker inputs and updates a logical address of data stored in an L2P mapping table in a certain level of a multi-layer L2P mapping table and an updated content of a mapping relationship between the data and a physical address in a Nand flash memory of a solid-state storage device based on a user graphical interface visually output by a user interaction module at the front end of the current terminal device on a front end screen, the front end user interaction module of the current terminal device immediately triggers an operation instruction for updating a mapping relationship between the logical address and the physical address in the multi-layer L2P mapping table, encapsulates the updated content and replaces a new physical address in the operation instruction, then transmits the operation instruction backward, and an operation execution module at the rear end of the current terminal device parses and extracts the updated content and replaces a new physical address from the operation instruction after receiving the operation instruction, and takes the updated content as update data of a mapping relationship between the stored data and the physical address in the L2P mapping table in the certain level of the multi-layer L2P mapping table, which is currently received.
Step S200, generating a record to be updated according to the table update data, and storing the record to be updated in a preset data cache;
after the current terminal equipment obtains the table update data of the multi-layer L2P mapping table which is updated at the current time, the current terminal equipment starts to integrate the table update data together with index information of the multi-layer L2P mapping table which is required to be updated at the current time as a record to be updated, and then stores the generated record to be updated in a preset data cache.
It should be noted that, in this embodiment, the preset data buffer may be specifically a buffer space (for example, a temporary data table) specially developed in advance and used for storing each record to be updated generated by the current terminal device in a data buffer preset in the current terminal device (or in an operation memory of the current terminal device), that is, when the current terminal device receives an operation instruction for updating the multi-layer L2P mapping table each time, the buffer space stores the table update data from the operation instruction, and the record to be updated generated according to the table update data.
Further, in a possible embodiment, in the step S200, the step of generating the record to be updated according to the table update data may include:
step S201, extracting index information of a to-be-updated multi-level mapping table pointed by the table update data;
Step S202, packaging the table update data and the index information as a record to be updated.
After receiving an operation instruction for updating a multi-layer L2P mapping table in the solid-state storage device and acquiring table updating data for updating the multi-layer L2P mapping table at the current time from the operation instruction, the current terminal device determines the multi-layer L2P mapping table to be updated pointed by the table updating data, extracts index information of the multi-layer L2P mapping table to be updated, and encapsulates the index information together with the table updating data acquired by analysis into a record to be updated for updating the multi-layer L2P mapping table at the current time.
It should be noted that, in this embodiment, the index information of the multi-layer L2P mapping table to be updated extracted by the current terminal device may include the table label and the table physical storage address of the L2P mapping table on the level to be updated in the multi-layer L2P mapping table to be updated, and it should be understood that, based on different design needs of practical applications, in other embodiments, it is also possible to use the L2P mapping table on the level to be updated as the index information of the multi-layer L2P mapping table to be updated, and the updating method of the multi-layer mapping table in the embodiment of the present invention is not limited to specific content of the index information.
Specifically, for example, after the current terminal device inputs update content-replaces a new physical address from a user graphical interface based on visual output by a worker, so as to trigger an operation instruction for updating a mapping relation between a logical address and a physical address in a multi-layer L2P mapping table, parse and extract the update content-replaces the new physical address, and take the update content as table update data for updating a mapping relation between a logical address and the physical address stored in the L2P mapping table on a certain layer in the multi-layer L2P mapping table currently received, the current terminal device immediately determines an L2P mapping table on a certain layer selected in the multi-layer L2P mapping table when the worker inputs the update content-replaces the new physical address, and then takes the L2P mapping table pointed by the extracted table update content as a table index-L2P table index of the L2P mapping table to be updated, and finally takes the current terminal device as a table index of the L2P mapping table to be updated, and the current terminal device performs mapping to the multi-layer table map information to be stored in the multi-layer table.
Further, in a possible embodiment, after the current terminal device generates the record to be updated for updating the multi-layer L2P mapping table at the current time based on the encapsulated table update data and the index information of the multi-layer L2P mapping table to be updated pointed by the table update data, the current terminal device may write the generated record to be updated into a cache space developed in the preset data buffer register of the current terminal device according to a storage rule configured by a staff (for example, in a storage structure of a queue and in a sequential storage manner), so as to perform the chained update operation for the multi-layer L2P mapping table in a centralized manner by reading each record to be updated stored in the cache space.
And step S300, when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data and carrying out chain update on the multi-level mapping table set to be updated.
It should be noted that, in this embodiment, the preset critical conditions may specifically be: the number of records to be updated stored in the data cache reaches the preset number of storage bars, and the preset number of storage bars can be specifically set according to the design requirement of practical application, for example, the preset number of storage bars is set to be 50 bars; in addition, based on different design requirements of practical application, the preset critical condition can be set to be other critical conditions, and the system time of the current terminal device reaches a preset update time node, wherein the preset update time node can be specifically set to be 02:00-04:00 in the early morning.
Further, in a possible embodiment, the preset critical conditions may be set together, for example, when the number of records to be updated stored in the data buffer reaches the preset number of storage stripes, it is determined that the data buffer reaches the critical condition, or when the number of records does not reach the preset number of storage stripes, but the system time of the current terminal device reaches the preset update time node, it may also be determined that the data buffer reaches the critical condition.
The current terminal equipment judges whether the data cache reaches a preset critical condition or not by detecting the number of records to be updated stored in the data cache, so that when judging that the data cache reaches the critical condition, the current terminal equipment starts to intensively read each record to be updated from the data cache and extract table update data in each record to be updated, and accordingly, chain type update operation is executed according to the multi-level mapping relation of the multi-layer L2P mapping table to be updated pointed by each table update data in each table update data set.
Further, in a possible embodiment, in step S200, after generating a record to be updated according to the table update data and storing the record to be updated in a preset data cache, the method for updating a multi-level mapping table according to the embodiment of the present invention may further include:
step A, counting the number of records to be updated stored in the data cache;
The current terminal equipment immediately superposes the number of the records to be updated stored in the buffer space after writing the generated records to be updated into the buffer space developed in the preset data buffer register of the current terminal equipment, so that the current terminal equipment also continuously counts the number of the records to be updated stored in the buffer space in the process of continuously storing the records to be updated generated each time into the buffer space.
Further, in another possible embodiment, the current terminal device may further sequentially number the records to be updated written into the data cache during the process of storing the records to be updated into the data cache in a sequential storage manner, so that the current terminal device may directly determine the number of all the records to be updated stored in the data cache by detecting the code of the last record to be updated stored into the data cache, and further determine whether the data cache has reached a preset critical condition (whether the number of records to be updated reaches the preset number of storage stripes).
Further, referring to fig. 3, in a possible embodiment, the step S30, when the data cache reaches a preset critical condition, reads each record to be updated to extract the table update data to perform chain update on the multi-level mapping table set to be updated, may include:
Step S301, when the counted number of the storage slots reaches the preset number of storage slots, reading each record to be updated from the data cache;
When the current terminal equipment counts the number of the records to be updated stored in the data cache and reaches the preset storage number of the data storage, the current terminal equipment immediately starts to read all the records to be updated of the preset storage number from the data cache.
Specifically, for example, the current terminal device counts the number of records to be updated stored in the buffer space after each record to be updated is stored and written in the buffer space developed in the preset data buffer register, so that after the count obtains that the number of preset storage lines to be updated stored in the buffer space is reached after the record to be updated generated at the current time is stored and written in the buffer space, the current terminal device determines that the buffer space currently reaches a critical condition for performing the update operation on the multi-layer L2P mapping table, and accordingly, the current terminal device starts to sequentially read all 50 records to be updated according to the sequence of sequentially storing the 50 records to be updated into the buffer space.
Step S302, extracting the table update data and the index information in each record to be updated, and performing chained update on the target multi-level mapping table set to be updated corresponding to the index information based on the table update data, where the number of the target multi-level mapping tables to be updated may be multiple.
After the current terminal equipment reads all the records to be updated from the data cache, the current terminal equipment synchronously extracts table update data and index information of a target multi-layer L2P mapping table to be updated, which is a target multi-layer mapping table to be updated, from all the records to be updated based on a distributed operation process, synchronously reads all the target multi-layer L2P mapping tables to be updated in a multi-layer mapping table storage structure based on the index information, and finally executes chained execution updating operation according to multi-layer mapping relations, which are respectively concentrated by the table update data, of all the target multi-layer L2P mapping tables to be updated.
Specifically, for example, the current terminal device simultaneously enables 5 threads (each line is supposed to simultaneously perform a task of updating the multi-level mapping relation of 10 multi-level L2P mapping tables) for performing updating on the multi-level L2P mapping table from a preset distributed thread pool, so that based on the running process of the 5 threads, the index information of the table update data respectively encapsulated by the 50 to-be-updated records and the target multi-level L2P mapping table to be updated pointed by the table update data is extracted from the 50 to-be-updated records, then, the target multi-level L2P mapping table to be updated is continuously read according to the index information in the multi-level mapping table storage structure synchronized based on the 5 threads, finally, the chained updating operation is still performed based on the table update data synchronized according to the respectively extracted table update data for the 5 threads, and the multi-level mapping relation of the target multi-level L2P mapping table to be updated pointed by the table update data.
Further, in a possible embodiment, in the step S302, the step of performing chain updating on the target to-be-updated multi-level mapping table set corresponding to the index information based on the table updating data may include:
step S3021, reading a target to-be-updated multi-level mapping table identified by the table label according to the table physical storage address of the index information;
When the current terminal equipment reads the target multi-layer L2P mapping table to be updated pointed by table updating data in all records to be updated from the synchronous multi-layer mapping table storage structure based on the distributed running process, the current terminal equipment directly reads each target multi-layer L2P mapping table to be updated, which is identified based on the table label, from the solid state storage equipment based on each process according to the table physical storage address of index information of the target multi-layer L2P mapping table to be updated.
Specifically, for example, when the current terminal device reads the target multi-layer L2P mapping table to be updated pointed by the table update data in all the records to be updated from the multi-layer mapping table storage structure based on the running processes of the 5 threads, each thread further reads the table index-L2P table index and the table physical storage address of the index information extracted from the record to be updated, which is responsible for processing, respectively, and then each thread directly reads each target multi-layer L2P mapping table to be updated, which is identified based on the L2P table index, from the solid-state storage device storing the L2P mapping table according to the table physical storage address, respectively.
Step S3022, performing centralized chained updating operation on the target multi-level mapping table to be updated according to the table updating data.
When the current terminal equipment executes updating operation on the target multi-layer L2P mapping table to be updated pointed by each table updating data according to the table updating data in each record to be updated based on the distributed running process, the current terminal equipment analyzes the table updating data extracted from the record to be updated which is responsible for processing based on each process so as to acquire and execute the updating content of the multi-layer L2P mapping table, which is updated by the staff corresponding to the table updating data.
Specifically, for example, when the current terminal device performs an update operation on each target multi-layer L2P mapping table to be updated according to table update data in all records to be updated based on an operation process of 5 threads, each thread further analyzes the table update data extracted from the record to be updated, which is responsible for processing, so as to obtain update contents, which are input by each corresponding staff of each table update data and are used for updating the L2P mapping table on a certain level in the multi-layer L2P mapping table, to replace a new physical address, and each thread performs the update contents to locate a target physical address associated with the "replace a new physical address" input by the staff from the target multi-layer L2P mapping table to be updated, which is pointed by the table update data, and then replaces the target physical address with the new physical address.
Further, in another possible embodiment, if the current terminal device detects that, in a plurality of records to be updated of the same type, the target multi-layer L2P mapping tables to be updated to which the table update data points respectively belong to the same storage section of the solid-state storage medium-Nand-Flash memory, the current terminal device may synchronously extract the table update data from the plurality of records to be updated of the same type in a process of centralized chained updating with respect to the multi-layer mapping relation of the target multi-layer L2P mapping table, so as to acquire and execute update contents required to be updated with respect to each of the plurality of target multi-layer L2P mapping tables.
In this embodiment, when detecting an operation instruction for updating a mapping relation table-multi-layer L2P mapping table in a solid-state storage device, a current terminal device controlling data storage obtains table update data for updating the multi-layer L2P mapping table from the operation instruction immediately; after the current terminal equipment obtains the table update data updated for the multi-layer L2P mapping table at the current time, the current terminal equipment starts to integrate the table update data together with index information of an L2P mapping table on a certain layer in the multi-layer L2P mapping table which needs to be updated at the current time as a record to be updated, and then stores the generated record to be updated in a preset data cache; the current terminal equipment judges whether the data cache reaches a preset critical condition or not by detecting the number of records to be updated stored in the data cache, so that when judging that the data cache reaches the critical condition, the current terminal equipment starts to intensively read each record to be updated from the data cache and extract table update data in each record to be updated, and accordingly, update operation is carried out on the multi-layer L2P mapping table to be updated pointed by each table update data according to each table update data set.
Compared with the prior method that when the multi-layer mapping table-multi-layer L2P mapping table needs to be updated every time, the storage structure of the multi-layer mapping table is independently used for inquiring the target multi-layer L2P mapping table which needs to be updated step by step and then executing the updating operation, the method and the device have the advantages that the table updating data which is updated every time aiming at the multi-layer mapping table is stored in the cache as one record, and the record is read until the cache meets a certain critical condition, so that the chained updating process of the multi-layer mapping relation of the L2P mapping table is executed according to the table updating data set in each record, the overhead on time consumption and the running memory occupation of the solid-state storage device is saved to a great extent, and the overall performance of the solid-state storage device on data reading and writing is ensured.
In addition, based on the first embodiment, a second embodiment of the method for updating a multi-level mapping table of the present invention is provided, and referring to fig. 4, fig. 4 is a flowchart illustrating a second embodiment of the method for updating a multi-level mapping table of the present invention. In this embodiment, in step S200, after generating a record to be updated according to the table update data and storing the record to be updated in a preset data cache, the method for updating a multi-level mapping table according to the embodiment of the present invention may further include:
Step S400, if a data reading instruction based on a mapping relation table is detected, reading the mapping relation table corresponding to the data reading instruction from the table update data stored in the data cache to perform a data reading operation.
In the whole process of executing updating operation by the current terminal equipment aiming at the multi-layer L2P mapping table, if a data reading instruction for reading data from the solid-state storage equipment based on the L2P mapping table is detected, the current terminal equipment firstly detects whether target table updating data pointing to the L2P mapping table required to be read by the data reading instruction exists in table updating data packaged by each record to be updated and stored in the data cache from the data cache for storing the record to be updated, and when the existence of the target table updating data is detected, the L2P mapping table is directly read from the solid-state storage equipment based on index information of the target L2P mapping table packaged in the record to be updated and stored in the target table updating data so as to carry out the data reading operation.
In this embodiment, after receiving an operation instruction for updating the L2P mapping table, the current terminal device parses the table update data from the operation instruction to package and generate a record to be updated, and stores the record to be updated in a preset data buffer register, if an instruction initiated by a staff member to read data from the solid-state storage device based on reading the L2P mapping table is received, the current terminal device preferentially detects whether index information such as a table label or a physical storage address of the L2P mapping table to be read by the instruction is packaged in each record to be updated stored in the data buffer register, and if so, the L2P mapping table can be read directly based on the index information and a read operation is performed on the mapping table to read the data. Therefore, the performance cost consumed by searching the L2P mapping table in the multi-level L2P mapping table storage structure can be further reduced, and the stability of reading the L2P mapping table extracted data can be ensured according to the searched L2P mapping table and table updating data.
Further, in a possible embodiment, the method for updating the multi-level mapping table according to the embodiment of the present invention may further include:
and step S500, when an update instruction aiming at the data cache is received, writing the data cache into a preset solid-state storage device, wherein the update instruction is automatically triggered or is triggered based on a preset algorithm operation.
In the whole process that the current terminal equipment executes the updating operation for the L2P mapping table, the current terminal equipment can automatically trigger an updating instruction for updating the data cache for storing the record to be updated based on a preset table updating period, or the current terminal equipment can trigger the updating instruction based on the fact that a worker inputs a preset algorithm operation through a user graphical interface visually output by the front end, and then when the updating instruction is detected, the terminal equipment immediately stores the record to be updated stored in the data cache at the current moment into a preset solid-state storage device.
It should be noted that, in this embodiment, the preset table update period may be specifically configured by a worker in advance in the top-most table in the multi-level L2P mapping table storage structure, for example, the time period may be specifically configured to be 2 hours, so that the current terminal device performs an update on the data cache every 2 hours, which is to say, it should be understood that, based on different design needs of practical application, the preset table update period may be configured to be other time periods, and the update method of the multi-level mapping table in this embodiment of the present invention is not limited to the specific size of the preset table update period.
In addition, the preset algorithm operation input by the staff on the user graphical interface may specifically be by clicking a preset instruction control on the user graphical interface, or by inputting corresponding instruction content by the staff based on a preset instruction input dialog box, it should be understood that, based on different design needs of practical application, in other embodiments, the staff may of course perform other operations to trigger the update instruction, and the update method of the mapping table in the embodiment of the present invention is not limited to the specific operation content of the preset algorithm operation.
In addition, the preset solid-state storage device may specifically be a storage device that stores the L2P mapping table and source data provided by the host of the data owner, such as a solid-state storage device—nand-flash memory.
Further, in a possible embodiment, in the step S300, after reading each record to be updated to extract the table update data to update the mapping relationship table to be updated when the data cache reaches a preset critical condition, the method for updating the multi-level mapping table according to the embodiment of the present invention may further include:
Step S600, clearing the data cache stored and written in the solid-state storage device.
And after reading each record to be updated from the data cache in the current terminal equipment set and extracting table update data in each record to be updated, and executing update operation on the L2P mapping table to be updated pointed by each table update data in each table update data set, the current terminal equipment immediately clears the data cache currently stored in the solid-state storage equipment, so that part of storage space occupied by solid-state storage for the data cache is released.
In this embodiment, the current terminal device triggers, by automatically or based on manual algorithm input by a worker, an update instruction for updating a data cache storing a record to be updated, and then stores the record to be updated in the data cache into the solid-state storage device according to the update instruction, so that the problem that the current terminal loses the record to be updated due to unexpected power failure, so that the update operation cannot be performed on the L2P mapping table is avoided, the overall stability of data storage is ensured, and in addition, after the current terminal device reads the record to be updated from the data cache and performs the update operation on the L2P mapping table, the current terminal device empties the data cache stored in the solid-state storage device, thereby releasing the corresponding storage space of the solid-state storage device.
In addition, referring to fig. 5, an embodiment of the present invention further provides a system for updating a multi-level mapping table, where the system for updating a multi-level mapping table includes:
The acquisition module is used for acquiring table update data aiming at the multi-level mapping table to be updated;
The recording module is used for generating a record to be updated according to the table updating data and storing the record to be updated in a preset data cache;
And the updating module is used for reading each record to be updated to extract the table updating data and carrying out chain updating on the multi-level mapping table set to be updated when the data cache reaches a preset critical condition.
Preferably, the updating system of the multi-level mapping table of the present invention further comprises:
And the data reading module is used for reading the mapping relation table corresponding to the data reading instruction from the table updating data stored in the data cache to perform data reading operation if the data reading instruction based on the mapping relation table is detected.
Preferably, the recording module includes:
the extraction unit is used for extracting index information of the multi-level mapping table to be updated pointed by the table update data;
and the packaging unit is used for packaging the table update data and the index information as a record to be updated.
Preferably, the updating system of the multi-level mapping table of the present invention further comprises:
The statistics module is used for counting the number of the records to be updated stored in the data cache;
the critical condition is that the number of the bars reaches a preset number of stored bars, and the updating module comprises:
the reading unit is used for reading each record to be updated from the data cache when the counted number of the records reaches the preset storage number;
And the centralized updating unit is used for extracting the table updating data and the index information in each record to be updated and carrying out chain updating on the target multi-level mapping table set to be updated corresponding to the index information based on the table updating data, wherein the number of the target multi-level mapping tables to be updated can be multiple.
Preferably, the index information includes: table labels and table physical storage addresses, the centralized updating unit comprises:
A reading subunit, configured to read, according to the table physical storage address of the index information, a target to be updated multi-level mapping table identified by the table label;
And the updating subunit is used for executing centralized chain updating operation on the target multi-level mapping table to be updated according to the table updating data.
Preferably, the updating system of the multi-level mapping table of the present invention further comprises:
and the cache updating module is used for writing the data cache into preset solid-state storage equipment when receiving an updating instruction aiming at the data cache, wherein the updating instruction is automatically triggered or is triggered based on a preset algorithm operation.
Preferably, the updating system of the multi-level mapping table of the present invention further comprises:
And the clearing module is used for clearing the data cache stored and written in the solid-state storage device.
The steps implemented by each functional module of the update system of the multi-level mapping table of the present invention during operation may refer to each embodiment of the method for updating a multi-level mapping table of the present invention, which is not described herein.
In addition, the embodiment of the invention also provides a terminal device, which comprises: the system comprises a memory, a processor and a multi-level mapping table updating program stored in the memory and capable of running on the processor, wherein the multi-level mapping table updating program realizes the steps of the multi-level mapping table updating method when being executed by the processor.
The steps implemented when the update program of the multi-level mapping table running on the processor is executed may refer to various embodiments of the update method of the multi-level mapping table of the present invention, which are not described herein.
In addition, the embodiment of the invention also provides a computer storage medium, which is applied to a computer, and can be a nonvolatile computer readable computer storage medium, wherein the computer storage medium stores an update program of a multi-level mapping table, and the update program of the multi-level mapping table realizes the steps of the update method of the multi-level mapping table when being executed by a processor.
The steps implemented when the update program of the multi-level mapping table running on the processor is executed may refer to various embodiments of the update method of the multi-level mapping table of the present invention, which are not described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a computer storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (7)
1. The method for updating the multi-level mapping table is characterized by comprising the following steps of:
Acquiring table update data for a multi-level mapping table to be updated;
generating a record to be updated according to the table updating data, and storing the record to be updated in a preset data cache, wherein the record to be updated comprises index information of a multi-layer L2P mapping table;
When the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data to intensively update the multi-level mapping table to be updated, wherein the preset critical condition is that the cache space reaches the critical condition of the centralized multi-level L2P mapping table for updating operation;
the step of generating the record to be updated according to the table update data comprises the following steps:
Extracting index information of a to-be-updated multi-level mapping table pointed by the table update data;
Packaging the table update data and the index information as a record to be updated;
After the step of storing the record to be updated in a preset data cache, the method comprises the following steps of;
counting the number of records to be updated stored in the data cache;
the critical condition is that the number of the entries reaches a preset number of storage entries, and when the data cache reaches a preset critical condition, reading each record to be updated to extract the table update data to perform chain update on the multi-level mapping table set to be updated, including:
When the counted number of the storage stripes reaches the preset number of the storage stripes, reading each record to be updated from the data cache;
Extracting the table update data and the index information in each record to be updated, and carrying out chain updating on a target multi-level mapping table set corresponding to the index information based on the table update data, wherein the number of the target multi-level mapping tables to be updated can be multiple;
The index information includes: the step of updating the target to-be-updated multi-level mapping table set corresponding to the index information in a chained mode based on the table updating data comprises the following steps:
reading a target to-be-updated multi-level mapping table identified by the table label according to the table physical storage address of the index information;
And executing centralized chained updating operation on the target multi-level mapping table to be updated according to the table updating data.
2. The method for updating a multi-level mapping table according to claim 1, further comprising, after the step of storing the record to be updated in a preset data cache:
And if the data reading instruction based on the mapping relation table is detected, reading the mapping relation table corresponding to the data reading instruction from the table updating data stored in the data cache so as to perform data reading operation.
3. The method of updating a multi-level mapping table of claim 1, further comprising:
And when receiving an updating instruction aiming at the data cache, writing the data cache into a preset solid-state storage device, wherein the updating instruction is automatically triggered or is triggered based on a preset algorithm operation.
4. The method of updating a multi-level mapping table as set forth in claim 3, further comprising, after said step of reading each of said records to be updated to extract said table update data to update said table of mapping relationships to be updated:
and clearing the data cache stored and written in the solid-state storage device.
5. An update system for a multi-level mapping table, the update system comprising:
The acquisition module is used for acquiring table update data aiming at the multi-level mapping table to be updated;
the recording module is used for generating a record to be updated according to the table updating data, storing the record to be updated in a preset data cache, and the record to be updated comprises index information of a multi-layer L2P mapping table;
The updating module is used for reading each record to be updated to extract the table updating data to intensively update the multi-level mapping table to be updated when the data cache reaches a preset critical condition, wherein the preset critical condition is that the cache space reaches a critical condition for updating the multi-level L2P mapping table in the centralized manner;
the recording module is also used for extracting index information of the multi-level mapping table to be updated pointed by the table update data; packaging the table update data and the index information as a record to be updated;
the recording module is also used for counting the number of the records to be updated stored in the data cache;
The critical condition is that the number of the bars reaches a preset storage bar number, and the updating module is further used for reading each record to be updated from the data cache when the counted number of the bars reaches the preset storage bar number; extracting the table update data and the index information in each record to be updated, and carrying out chain updating on a target multi-level mapping table set corresponding to the index information based on the table update data, wherein the number of the target multi-level mapping tables to be updated can be multiple;
The index information includes: the updating module is further used for reading a target to-be-updated multi-level mapping table identified by the table label according to the table physical storage address of the index information; and executing centralized chained updating operation on the target multi-level mapping table to be updated according to the table updating data.
6. A terminal device, characterized in that the terminal device comprises: memory, a processor and an update program for a multi-level mapping table stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method for updating a multi-level mapping table according to any one of claims 1 to 4.
7. A computer storage medium, characterized in that the computer storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of updating a multi-level mapping table as claimed in any one of claims 1 to 4.
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