CN112559386A - Method and device for improving SSD performance, computer equipment and storage medium - Google Patents
Method and device for improving SSD performance, computer equipment and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000013507 mapping Methods 0.000 claims abstract description 175
- 238000004590 computer program Methods 0.000 claims description 15
- 238000012790 confirmation Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 238000010200 validation analysis Methods 0.000 claims description 2
- 238000013403 standard screening design Methods 0.000 description 24
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000013506 data mapping Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
- G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
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Abstract
The invention relates to a method, a device, computer equipment and a storage medium for improving SSD performance; the method comprises the following steps: converting the logical page number into a mapping table data page number; judging whether mapping table data corresponding to the mapping table data page number is loaded or not; inquiring a first-level mapping table, acquiring a physical page number of a physical address where mapping table data is located, and recording the page number of the mapping table data in a request inquiring table; reading a physical page number of a physical address; according to the record in the request query table, confirming the mapping table data requirement in the physical page number of the read physical address to obtain the requirement mapping table data; loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table; and inquiring a storage area corresponding to the secondary mapping table to obtain a physical page number corresponding to the logical page number. The invention greatly reduces the loading operation of the page number of the mapping table data after the mapping table data is read, reduces the time consumption, accelerates the loading performance of the mapping table and improves the overall random reading and writing performance.
Description
Technical Field
The present invention relates to the technical field of SSD performance enhancement, and more particularly, to a method, an apparatus, a computer device, and a storage medium for enhancing SSD performance.
Background
In an SSD product with limited memory, a mapping table cannot be loaded in full, and the mapping table needs to be dynamically loaded into the memory from the NAND flash according to needs in the using process. The mapping table is stored in the NAND flash, so when the mapping table is loaded, the smallest reading unit is usually basically 4KB, for a random read-write scene, compared with the required mapping table information, the data amount read by a single mapping table is much larger, and the loaded 4KB mapping is processed by conventional operation, which causes that the overhead caused by the loading of the mapping table is larger in the random read-write scene, and the integral performance of the SSD is lower.
Disclosure of Invention
The present invention is directed to overcome the defects of the prior art, and provides a method, an apparatus, a computer device and a storage medium for improving the performance of an SSD.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for improving the performance of the SSD comprises the following steps:
converting the logical page number into a mapping table data page number;
judging whether mapping table data corresponding to the mapping table data page number is loaded or not;
if so, inquiring the first-level mapping table, acquiring the physical page number of the physical address where the mapping table data is located, and recording the page number of the mapping table data in the request inquiring table;
reading a physical page number of a physical address;
according to the record in the request query table, performing requirement confirmation on the mapping table data in the physical page number of the read physical address to obtain requirement mapping table data;
loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table;
and inquiring a storage area corresponding to the secondary mapping table to obtain a physical page number corresponding to the logical page number.
The further technical scheme is as follows: in the step of converting the logical page number into the mapping table data page number, the logical page number is converted into the mapping table data page number according to a fixed proportion.
The further technical scheme is as follows: if so, inquiring the first-level mapping table, acquiring the physical page number of the physical address where the mapping table data is located, and recording the mapping table data page number in the request inquiry table by 1-bit recording in the request inquiry table.
The further technical scheme is as follows: after the step of performing demand validation on the mapping table data in the physical page number of the read physical address according to the record in the request lookup table to obtain the demand mapping table data, the method further includes: and recording the residual required mapping table data as the non-required mapping table data, and discarding the non-required mapping table data without processing.
An apparatus to improve SSD performance, comprising: the device comprises a conversion unit, a judgment unit, a first query acquisition unit, a reading unit, a confirmation unit, a loading unit and a second query acquisition unit;
the conversion unit is used for converting the logical page number into a mapping table data page number;
the judging unit is used for judging whether mapping table data corresponding to the mapping table data page numbers are loaded or not;
the first query obtaining unit is used for querying the first-level mapping table, obtaining the physical page number of the physical address where the mapping table data is located, and recording the page number of the mapping table data in the request query table;
the reading unit is used for reading the physical page number of the physical address;
the confirmation unit is used for performing requirement confirmation on the mapping table data in the physical page number of the read physical address according to the record in the request query table to obtain the requirement mapping table data;
the loading unit is used for loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table;
and the second query acquisition unit is used for querying the storage area corresponding to the secondary mapping table and acquiring the physical page number corresponding to the logical page number.
The further technical scheme is as follows: and in the conversion unit, converting the logical page number into the mapping table data page number according to a fixed proportion.
The further technical scheme is as follows: in the first query obtaining unit, 1-bit record is carried out on the data page number of the mapping table in the request query table.
The further technical scheme is as follows: further comprising: and the recording and discarding unit is used for recording the residual required mapping table data as the non-required mapping table data and discarding and not processing the non-required mapping table data.
A computer device comprising a memory having a computer program stored thereon and a processor that when executed implements a method of improving SSD performance as described above.
A storage medium storing a computer program comprising program instructions which, when executed by a processor, implement a method of improving SSD performance as described above.
Compared with the prior art, the invention has the beneficial effects that: the method has the advantages that the requirement mapping table section is accurately tracked by adding a mapping requirement request query table, after the mapping table data page is read, only the mapping table section which is actually required is processed, and the mapping table section which is not required is abandoned, so that the loading operation of the mapping table data page number after the mapping table data is read is greatly reduced, a large amount of time is reduced, the mapping table loading performance is accelerated, the improvement of the integral random read-write performance of the SSD is realized, and the requirement can be better met.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a diagram of a conventional mapping table data storage application;
FIG. 2 is a diagram illustrating an application of a conventional mapping table loading;
fig. 3 is a schematic flowchart of a method for improving SSD performance according to an embodiment of the invention;
fig. 4 is a schematic diagram of an application of mapping table loading according to an embodiment of the present invention;
FIG. 5 is a schematic block diagram of an apparatus for improving SSD performance provided by an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a computer device provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to the specific embodiment shown in fig. 1 to 6, in the conventional technology shown in fig. 1 to 2, a secondary mapping table is used to record mapping information records from a user logical address to a physical address, a primary mapping table is derived from a management requirement for the secondary mapping table, the secondary mapping table is large and can be updated periodically, and an updated portion needs to be discretely recorded in a NAND flash.
For some SSDs with limited memory, a secondary mapping table needs to be dynamically loaded, a required LPN is converted into an MPN, a primary mapping table is inquired to find a physical address PPN for storing corresponding MPN data, corresponding data are read from a NAND Flash, a conventional NAND Flash page is at least 4KB, so that a plurality of MPNs exist in one page (page), and all effective MPN information in the page is sequentially loaded into the memory after the data are read. For a random read-write scenario, because the address of the mapping table is randomly accessed, the mapping table loaded in the memory is unlikely to be hit, and thus, along with a large number of mapping table loading operations, the conventional mapping table loading operation has many redundant MPNs, which consumes time, and results in low overall performance of the SSD.
Wherein the noun explanations in fig. 1 and fig. 2 are as follows:
logic Page Number, logical Page Number, user data mapping Unit, usually 4 KB;
MPN: map Page Number, mapping Table data management Unit, commonly 256B/512B/4KB/…
PPN: physical Page Number, NAND Page address;
referring to fig. 3 to 4, the present invention discloses a method for improving SSD performance, comprising the following steps:
s1, converting the logic page number into mapping table data page number;
wherein, the logic page number is converted into the mapping table data page number according to a fixed proportion, and the fixed proportion is 0.5-3 times.
S2, judging whether mapping table data corresponding to the mapping table data page number is loaded; if not, step S7 is executed to query the storage area corresponding to the secondary mapping table, and obtain the physical page number corresponding to the logical page number.
S3, if yes, inquiring the first-level mapping table, obtaining the physical page number of the physical address where the mapping table data is located, and recording the page number of the mapping table data in the request inquiring table;
and the mapping table data page number is recorded in the request query table by 1 bit, so that the memory is saved.
S4, reading the physical page number of the physical address;
s5, according to the record in the request lookup table, performing requirement confirmation on the mapping table data in the physical page number of the read physical address to obtain requirement mapping table data;
after step S5, the method further includes: and recording the residual required mapping table data as the non-required mapping table data, and discarding the non-required mapping table data without processing.
S6, loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table;
s7, inquiring the storage area corresponding to the secondary mapping table, and obtaining the physical page number corresponding to the logical page number.
As shown in fig. 4, a request lookup table for querying a mapping table data page number is newly added, 1-bit recording is performed on each mapping table data page number in the table, whether the mapping table data page number is a mapping table data page number that a system needs to access is described, after mapping table information is read from a NAND flash, all mapping table data page numbers in a mapping table storage page are sequentially queried for the table, a mapping table loading operation is performed only when the corresponding mapping table data page number is recorded as a requirement, and other useless mapping table data page numbers are directly discarded. For a random read-write scene, only 1 mapping table data page number in a loaded mapping table storage page is actually required, and by means of the method, the mapping table data page number information loading operation after the mapping table is read can be greatly reduced, a large amount of time is reduced, and accordingly the SSD random read-write performance is effectively improved.
According to the invention, a mapping requirement request query table is additionally arranged, a requirement mapping table segment is accurately tracked, after a mapping table data page is read, only the actually required mapping table segment is processed, and the mapping table segment is discarded if not required, so that the loading operation of the mapping table data page number after the mapping table data is read is greatly reduced, and a large amount of time is reduced, thereby accelerating the loading performance of the mapping table, realizing the improvement of the integral random read-write performance of the SSD, and being capable of better meeting the requirement.
Referring to fig. 5, the present invention also discloses a device for improving SSD performance, including: the system comprises a conversion unit 10, a judgment unit 20, a first query acquisition unit 30, a reading unit 40, a confirmation unit 50, a loading unit 60 and a second query acquisition unit 70;
the conversion unit 10 is configured to convert the logical page number into a mapping table data page number;
the judging unit 20 is configured to judge whether mapping table data corresponding to a mapping table data page number is loaded;
the first query obtaining unit 30 is configured to query the first-level mapping table, obtain a physical page number of a physical address where mapping table data is located, and record the page number of the mapping table data in the request query table;
the reading unit 40 is configured to read a physical page number of a physical address;
the confirming unit 50 is configured to perform demand confirmation on the mapping table data in the physical page number of the read physical address according to the record in the request lookup table, so as to obtain demand mapping table data;
the loading unit 60 is configured to load the data of the requirement mapping table into the storage area corresponding to the secondary mapping table;
the second query obtaining unit 70 is configured to query a storage area corresponding to the secondary mapping table, and obtain a physical page number corresponding to the logical page number.
In the conversion unit 10, the logical page number is converted into a mapping table data page number according to a fixed ratio.
In the first query obtaining unit 30, the mapping table data page number is recorded in the request query table by 1 bit.
Wherein, the device still includes: and a discarding unit 80, configured to discard the unnecessary mapping table data by marking the remaining required mapping table data as the unnecessary mapping table data.
It should be noted that, as can be clearly understood by those skilled in the art, the specific implementation processes of the above-mentioned apparatus for improving SSD performance and each unit may refer to the corresponding descriptions in the foregoing method embodiments, and for convenience and brevity of description, no further description is provided herein.
The above-mentioned means for improving the performance of the SSD may be implemented in the form of a computer program, which may be run on a computer device as shown in fig. 6.
Referring to fig. 6, fig. 6 is a schematic block diagram of a computer device according to an embodiment of the present application; the computer device 500 may be a terminal or a server, where the terminal may be an electronic device with a communication function, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, and a wearable device. The server may be an independent server or a server cluster composed of a plurality of servers.
Referring to fig. 6, the computer device 500 includes a processor 502, memory, and a network interface 505 connected by a system bus 501, where the memory may include a non-volatile storage medium 503 and an internal memory 504.
The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer programs 5032 include program instructions that, when executed, cause the processor 502 to perform a method of improving SSD performance.
The processor 502 is used to provide computing and control capabilities to support the operation of the overall computer device 500.
The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503, and when the computer program 5032 is executed by the processor 502, the processor 502 can be enabled to perform a method for improving the performance of the SSD.
The network interface 505 is used for network communication with other devices. Those skilled in the art will appreciate that the configuration shown in fig. 6 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation of the computer device 500 to which the present application may be applied, and that a particular computer device 500 may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
It should be understood that in the embodiment of the present Application, the Processor 502 may be a Central Processing Unit (CPU), and the Processor 502 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. Wherein a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will be understood by those skilled in the art that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program instructing associated hardware. The computer program includes program instructions, and the computer program may be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program comprises program instructions that, when executed by a processor, implement the method of improving SSD performance described above.
The storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, which can store various computer readable storage media.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a terminal, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention.
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A method for improving SSD performance, comprising the steps of:
converting the logical page number into a mapping table data page number;
judging whether mapping table data corresponding to the mapping table data page number is loaded or not;
if so, inquiring the first-level mapping table, acquiring the physical page number of the physical address where the mapping table data is located, and recording the page number of the mapping table data in the request inquiring table;
reading a physical page number of a physical address;
according to the record in the request query table, performing requirement confirmation on the mapping table data in the physical page number of the read physical address to obtain requirement mapping table data;
loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table;
and inquiring a storage area corresponding to the secondary mapping table to obtain a physical page number corresponding to the logical page number.
2. The method according to claim 1, wherein in the step of converting the logical page number into the mapping table data page number, the logical page number is converted into the mapping table data page number according to a fixed ratio.
3. The method according to claim 1, wherein if yes, the first-level mapping table is queried, a physical page number of a physical address where mapping table data is located is obtained, and in the step of recording the mapping table data page number in the request lookup table, 1-bit recording is performed on the mapping table data page number in the request lookup table.
4. The method according to claim 1, wherein after the step of performing a requirement validation on the mapping table data in the physical page number of the read physical address according to the record in the request lookup table to obtain the requirement mapping table data, the method further comprises: and recording the residual required mapping table data as the non-required mapping table data, and discarding the non-required mapping table data without processing.
5. An apparatus for improving SSD performance, comprising: the device comprises a conversion unit, a judgment unit, a first query acquisition unit, a reading unit, a confirmation unit, a loading unit and a second query acquisition unit;
the conversion unit is used for converting the logical page number into a mapping table data page number;
the judging unit is used for judging whether mapping table data corresponding to the mapping table data page numbers are loaded or not;
the first query obtaining unit is used for querying the first-level mapping table, obtaining the physical page number of the physical address where the mapping table data is located, and recording the page number of the mapping table data in the request query table;
the reading unit is used for reading the physical page number of the physical address;
the confirmation unit is used for performing requirement confirmation on the mapping table data in the physical page number of the read physical address according to the record in the request query table to obtain the requirement mapping table data;
the loading unit is used for loading the data of the requirement mapping table to a storage area corresponding to the secondary mapping table;
and the second query acquisition unit is used for querying the storage area corresponding to the secondary mapping table and acquiring the physical page number corresponding to the logical page number.
6. The apparatus of claim 5, wherein the conversion unit converts the logical page number into the mapping table data page number according to a fixed ratio.
7. The apparatus of claim 5, wherein in the first lookup table unit, a 1-bit record is made in the request lookup table for the page number of the mapping table data.
8. The apparatus of claim 5, further comprising: and the recording and discarding unit is used for recording the residual required mapping table data as the non-required mapping table data and discarding and not processing the non-required mapping table data.
9. A computer device comprising a memory having stored thereon a computer program and a processor that, when executing the computer program, implements the method of improving SSD performance of any of claims 1-4.
10. A storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the method of improving SSD performance of any of claims 1-4.
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| CN112882663A (en) * | 2021-03-25 | 2021-06-01 | 湖南国科微电子股份有限公司 | Random writing method, electronic equipment and storage medium |
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