CN109800230A - A kind of storage method and device of memory database varchar field - Google Patents
A kind of storage method and device of memory database varchar field Download PDFInfo
- Publication number
- CN109800230A CN109800230A CN201811642903.4A CN201811642903A CN109800230A CN 109800230 A CN109800230 A CN 109800230A CN 201811642903 A CN201811642903 A CN 201811642903A CN 109800230 A CN109800230 A CN 109800230A
- Authority
- CN
- China
- Prior art keywords
- field
- varchar
- data line
- memory
- overflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses the storage methods and device of a kind of memory database varchar field, this method comprises: constructing the fixed data line of multirow length in memory database, each data line is respectively to store a varchar field；Respectively each varchar field configuration memory overflow page；Varchar field is stored in data line according to the byte number of each varchar field, alternatively, being stored in data line and memory overflow page.By implementing the present invention, fix the length of data line in memory database, the total data of varchar field is stored using a line on the fixed-length field in data line+some overflow page, different varchar field on table, there is the overflow page of one group of length of not going together, in the case where keeping influencing lesser situation to data line access performance, memory database concurrency, EMS memory occupation is also smaller, and comprehensive performance is preferable.
Description
Technical field
The present invention relates to technical field of data processing, and in particular to a kind of storage side of memory database varchar field
Method and device.
Background technique
When the prior art supports varchar field in memory database or the data line length of the every a line of tables of data
It is not fixed, is determined according to the length of varchar actual use, data behavior is elongated, and data line each in this way is arranged in memory
It arranges irregular, access speed is influenced, simultaneously because the update and deletion of data line, it is broken to will cause the inconsistent memory of many length
Piece influences the distribution in data line space next time, and fragment degree needs to carry out page breakage arrangement when serious, page breakage arranges
Period, other data lines on entire page require to be locked, and influence concurrent access performance.
Also, in the prior art, (entire data line first place is aligned, or overflows word for head and the tail alignment in memory for more requirements
Section is aligned in other page first place), continuously allocation space and use, as the time increases, RAM fragmentation is serious, memory
Utilization rate is low, if carrying out memory fragmentation arrangement, needs entire memory pages to lock, influences concurrent access performance.
Summary of the invention
In view of this, the embodiment of the invention provides the storage method and device of a kind of memory database varchar field,
Concurrent access performance is influenced to solve the problem of that memory fragmentation existing for existing internal storage data storage method is more.
According in a first aspect, being wrapped the embodiment of the invention provides a kind of storage method of memory database varchar field
It includes: constructing the fixed data line of multirow length in memory database, each data line is respectively to store a varchar word
Section；Respectively each varchar field configuration memory overflow page；According to the byte number of each varchar field by institute
It states varchar field to be stored in the data line, alternatively, being stored in the data line and memory overflow page.
With reference to first aspect, in first aspect first embodiment, the memory overflow page of each varchar field
It does not share.
With reference to first aspect or first aspect first embodiment, in first aspect second embodiment, the memory
Each overflow field in overflow page uses an at most overflow line.
It with reference to first aspect, will according to the byte number of each varchar field in first aspect third embodiment
The varchar field is stored in the data line, comprising: when the byte number of the varchar field is less than the data
When capable byte limit value, the 1st byte in the data line is stored to the length of the varchar field, the data line
Other spaces be used to store the character string of the varchar field.
It with reference to first aspect, will according to the byte number of each varchar field in the 4th embodiment of first aspect
The varchar field is stored in the data line, comprising: when the byte number of the varchar field is greater than or equal to institute
When stating the byte limit value of data line, preceding 2 bytes of the data line are used to store the length of the varchar field, rear 4
A byte is used to store the page number for indicating overflow field and indicate the line number of overflow field, and the varchar field is corresponding
Memory overflow page be divided into the different types of overflow page of multiple groups, be respectively used to store the character string of the varchar field.
4th embodiment with reference to first aspect, in the 5th embodiment of first aspect, every group of different types of spilling
The data line length of page is unequal.
According to second aspect, the embodiment of the invention provides a kind of storage device of memory database varchar field, packets
Include: data line constructs module, for constructing the fixed data line of multirow length, each data line difference in memory database
To store a varchar field；Overflow page configuration module is overflow for respectively each varchar field configuration memory
Page-out；Field data memory module, for being deposited the varchar field according to the byte number of each varchar field
Storage is in the data line, alternatively, being stored in the data line and memory overflow page.
In conjunction with second aspect, in second aspect first embodiment, the memory overflow page of each varchar field
It does not share.
In conjunction with second aspect or second aspect first embodiment, in second aspect second embodiment, the memory
Each overflow field in overflow page uses an at most overflow line.
In conjunction with second aspect, in second aspect third embodiment, the field data memory module includes: the first word
Section sub-module stored, when for being less than the byte limit value of the data line when the byte number of the varchar field, by the number
The length of the varchar field is stored according to the 1st byte in row, other spaces of the data line are described for storing
The character string of varchar field.
In conjunction with second aspect, in the 4th embodiment of second aspect, the field data memory module further include: second
Field sub-module stored, when for being greater than or equal to the byte limit value of the data line when the byte number of the varchar field,
Preceding 2 bytes of the data line are used to store the length of the varchar field, rear 4 bytes to indicate to overflow for storing
It the page number of field and indicates the line number of overflow field out, and the corresponding memory overflow page of the varchar field is divided into more
The different types of overflow page of group, is respectively used to store the character string of the varchar field.
In conjunction with the 4th embodiment of second aspect, in the 5th embodiment of second aspect, every group of different types of spilling
The data line length of page is unequal.
According to the third aspect, the embodiment of the invention provides a kind of electronic equipment/mobile terminal/servers, comprising: storage
Device and processor communicate with each other connection, are stored with computer in the memory and refer between the memory and the processor
It enables, the processor is by executing the computer instruction, thereby executing any one of first aspect or first aspect reality
Apply the storage method of memory database varchar field described in mode.
It is described computer-readable the embodiment of the invention provides a kind of computer readable storage medium according to fourth aspect
Storage medium stores computer instruction, and the computer instruction is for making the computer execute first aspect or first aspect
Any one embodiment described in memory database varchar field storage method.
The beneficial effect that the embodiment of the present invention has is, fixes the length of data line in memory database, uses number
Store the total data of varchar field according to a line on the fixed-length field on row+some overflow page, it is different on table
Varchar field has the overflow page of one group of length of not going together, is keeping to data line access performance, memory database concurrency
It influences in lesser situation, EMS memory occupation is also smaller, and comprehensive performance is preferable.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows the flow chart of the storage method of the memory database varchar field of the embodiment of the present invention；
Fig. 2 shows the structural schematic diagrams of the storage device of the memory database varchar field of the embodiment of the present invention；
Fig. 3 shows the structural block diagram of the computer equipment of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of storage method of memory database varchar field, as shown in Figure 1, the memory
The storage method of database varchar field specifically includes that
Step S1: the fixed data line of multirow length is constructed in memory database, each data line is respectively to store one
Varchar field；
Step S2: being respectively each varchar field configuration memory overflow page；
In memory database, the length of data line is fixed, and each data line is respectively to store a varchar field, then
The varchar field occupies fixed length in data line, also, is each corresponding memory of varchar (n) field configuration
Overflow page, and not with other varchar field common memory overflow pages, each overflow field at most only will use to one
A overflow line, so at most only can once additional addressing, improve the access efficiency of data line.
Varchar field: being stored in data line by step S3 according to the byte number of each varchar field, alternatively, storage
In data line and memory overflow page.
The storage method of memory database varchar field through the embodiment of the present invention, makes data in memory database
Capable length is fixed, and stores varchar field using a line on the fixed-length field in data line+some overflow page
Total data, different varchar fields, there is the overflow page of one group of length of not going together on table, is keeping to data line access property
Energy, memory database concurrency influence in lesser situation, and EMS memory occupation is also smaller, and comprehensive performance is preferable.
Optionally, in some embodiments of the invention, above-mentioned steps S3, according to the byte of each varchar field
The varchar field is stored in the data line by number, is specifically included:
When the byte number of varchar field is less than the byte limit value of data line, the 1st byte in data line is stored
The length of varchar field, other spaces of data line are used to store the character string of varchar field.For containing varchar
The table of field, each 255 bytes of varchar field fixed allocation, varchar (n) is stored directly in if n < 255
In data line in table, before 1 byte be used to store the actual length of varchar field, at most can store length is
254 character string.Such as varchar (200), then it is stored directly in data line, sacrifices the visit that point space improves data line
It asks performance, does not need to go other place addressing access evidences again.
Optionally, in some embodiments of the invention, above-mentioned steps S3, according to the byte of each varchar field
The varchar field is stored in the data line by number, further includes:
When the byte number of varchar field is greater than or equal to the byte limit value of data line, by preceding 2 bytes of data line
For storing the length of varchar field, rear 4 bytes are used to store the page number for indicating overflow field and indicate overflow field
Line number, and the corresponding memory overflow page of varchar field is divided into the different types of overflow page of multiple groups, it is respectively used to store
The character string of varchar field.
If n >=255, the physical length of preceding 2 bytes storage varchar field in data line, in rear 4 bytes
Hold are as follows: (line number of+2 byte representation overflow fields of page number of 2 byte representation overflow fields), while by the varchar word
The memory overflow page of section is divided into the different types of overflow page of k group, and the data line length inside every group of overflow page differs, such as right
In varchar (1249), the content of 249 bytes is stored up in data line, at most needs memory length on the row of overflow page
For the content of 1000 bytes；If actual string length is 250, the length of 1 byte need to be only stored on the row of overflow page
Degree, wastes larger at this time.It is wasted to reduce, the overflow page of 5 set types can be divided into, and length is different:
1st group of overflow page: row length is 200, the field that storage actual overflow length is 1~200；
2nd group of overflow page: row length is 400, the field that storage actual overflow length is 201~400；
3rd group of overflow page: row length is 600, the field that storage actual overflow length is 401~600；
4th group of overflow page: row length is 800, the field that storage actual overflow length is 601~800；
5th group of overflow page: row length is 1000, the field that storage actual overflow length is 801~1000.
The length of part according to the physical length of varchar field beyond data line, division multiple groups length is different to overflow
Page out, so that reasonable distribution memory space, avoids the occurrence of the feelings for only storing 1-2 byte content in above-mentioned larger space overflow page
Condition reduces the space waste on each overflow line.Also, by above-mentioned division, so that each overflow field is only spilt into admittedly
Fixed a line reduces addressing when obtaining data line content, improves data-handling efficiency.
It should be noted that byte limit value and row length of 255 bytes as data line mentioned in above-described embodiment
The demarcation interval of degree is for example, being not intended to limit the invention.
The embodiment of the present invention also provides a kind of storage device of memory database varchar field, as shown in Fig. 2, this is interior
The storage device of deposit data library varchar field includes: data line building module 1, overflow page configuration module 2 and field data
Memory module 3.
Above-mentioned data line building module 1 in memory database for constructing the fixed data line of multirow length, each data
Row is respectively to store a varchar field；Overflow page configuration module 2 is for being respectively each varchar field configuration memory
Overflow page；Detailed content can be found in the associated description of the step S1 and step S2 of above method embodiment.
Field data memory module 3 is used to that varchar field to be stored in data according to the byte number of each varchar field
In row, alternatively, being stored in data line and memory overflow page；Detailed content can be found in the step S3's of above method embodiment
Associated description.
The storage device of memory database varchar field through the embodiment of the present invention, makes data in memory database
Capable length is fixed, and stores varchar field using a line on the fixed-length field in data line+some overflow page
Total data, different varchar fields, there is the overflow page of one group of length of not going together on table, is keeping to data line access property
Energy, memory database concurrency influence in lesser situation, and EMS memory occupation is also smaller, and comprehensive performance is preferable.
Optionally, in some embodiments of the invention, above-mentioned field data memory module 3 specifically includes:
First field sub-module stored will when for being less than the byte limit value of data line when the byte number of varchar field
The length of the 1st byte storage varchar field in data line, other spaces of data line are for storing varchar field
Character string.Specifically, for the table containing varchar field, each 255 bytes of varchar field fixed allocation, for
Varchar (n) is stored directly in the data line in table if n < 255, before 1 byte for storing varchar field
Actual length, at most can store length be 254 character string.Such as varchar (200), then it is stored directly in data
On row, the access performance that point space improves data line is sacrificed, does not need to go other place addressing access evidences again.
Optionally, in some embodiments of the invention, above-mentioned field data memory module 3 further include:
Second field sub-module stored, the byte for being greater than or equal to data line for the byte number when varchar field limit
When value, preceding 2 bytes of data line are used to store the length of varchar field, rear 4 bytes to indicate to overflow word for storing
The page number of section and the line number for indicating overflow field, and the corresponding memory overflow page of varchar field is divided into multiple groups inhomogeneity
The overflow page of type is respectively used to the character string of storage varchar field.
Specifically, if n >=255, the physical length of preceding 2 bytes storage varchar field in data line, latter 4
Byte content are as follows: (line number of+2 byte representation overflow fields of page number of 2 byte representation overflow fields), while should
The memory overflow page of varchar field is divided into the different types of overflow page of k group, the data line length inside every group of overflow page
It differs, such as varchar (1249), the content of 249 bytes is stored up in data line, is at most needed on the row of overflow page
Memory length is the content of 1000 bytes；If actual string length is 250,1 need to be only stored on the row of overflow page
The length of byte wastes larger at this time.It is wasted to reduce, the overflow page of 5 set types can be divided into, and length is different:
1st group of overflow page: row length is 200, the field that storage actual overflow length is 1~200；
2nd group of overflow page: row length is 400, the field that storage actual overflow length is 201~400；
3rd group of overflow page: row length is 600, the field that storage actual overflow length is 401~600；
4th group of overflow page: row length is 800, the field that storage actual overflow length is 601~800；
5th group of overflow page: row length is 1000, the field that storage actual overflow length is 801~1000.
The length of part according to the physical length of varchar field beyond data line, division multiple groups length is different to overflow
Page out, so that reasonable distribution memory space, avoids the occurrence of the feelings for only storing 1-2 byte content in above-mentioned larger space overflow page
Condition reduces the space waste on each overflow line.Also, by above-mentioned division, so that each overflow field is only spilt into admittedly
Fixed a line reduces addressing when obtaining data line content, improves data-handling efficiency.
It should be noted that byte limit value and row length of 255 bytes as data line mentioned in above-described embodiment
The demarcation interval of degree is for example, being not intended to limit the invention.
The embodiment of the invention also provides a kind of computer equipments, as shown in figure 3, the computer equipment may include processing
Device 31 and memory 32, wherein processor 31 can be connected with memory 32 by bus or other modes, to pass through in Fig. 3
For bus connection.
Processor 31 can be central processing unit (Central Processing Unit, CPU).Processor 31 can be with
For other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
The combination of the chips such as discrete hardware components or above-mentioned all kinds of chips.
Memory 32 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module, such as the storage side of the memory database varchar field in the embodiment of the present invention
Corresponding program instruction/the module of method is (for example, data line shown in Fig. 2 building module 1, overflow page configuration module 2 and Field Count
According to memory module 3).Non-transient software program, instruction and module of the processor 31 by operation storage in memory 32, from
And execute the various function application and data processing of processor, that is, realize the memory database in above method embodiment
The storage method of varchar field.
Memory 32 may include storing program area and storage data area, wherein storing program area can storage program area,
Application program required at least one function；It storage data area can the data etc. that are created of storage processor 31.In addition, storage
Device 32 may include high-speed random access memory, can also include non-transient memory, for example, at least a magnetic disk storage
Part, flush memory device or other non-transient solid-state memories.In some embodiments, it includes relative to place that memory 32 is optional
The remotely located memory of device 31 is managed, these remote memories can pass through network connection to processor 31.The reality of above-mentioned network
Example includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
One or more of modules are stored in the memory 32, when being executed by the processor 31, are executed
The storage method of memory database varchar field in embodiment as shown in Figure 1.
Above-mentioned computer equipment detail can correspond to corresponding correlation in embodiment referring to FIG. 1 to 2 and retouch
It states and is understood with effect, details are not described herein again.
It is that can lead to it will be understood by those skilled in the art that realizing all or part of the process in above-described embodiment method
Computer program is crossed to instruct relevant hardware and complete, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can for magnetic disk,
CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access
Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or solid state hard disk
(Solid-State Drive, SSD) etc.；The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (14)
1. a kind of storage method of memory database varchar field characterized by comprising
The fixed data line of multirow length is constructed in memory database, each data line is respectively to store a varchar
Field；
Respectively each varchar field configuration memory overflow page；
The varchar field is stored in the data line according to the byte number of each varchar field, alternatively, depositing
Storage is in the data line and memory overflow page.
2. the storage method of memory database varchar field according to claim 1, which is characterized in that each institute
The memory overflow page for stating varchar field does not share.
3. the storage method of memory database varchar field according to claim 1 or 2, which is characterized in that in described
Each overflow field in overflow page is deposited, an at most overflow line is used.
4. the storage method of memory database varchar field according to claim 1, which is characterized in that according to each institute
The varchar field is stored in the data line by the byte number for stating varchar field, comprising:
When the byte number of the varchar field is less than the byte limit value of the data line, by the 1st in the data line
Byte stores the length of the varchar field, other spaces of the data line are used to store the word of the varchar field
Symbol string.
5. the storage method of memory database varchar field according to claim 1, which is characterized in that according to each institute
The varchar field is stored in the data line and memory overflow page by the byte number for stating varchar field, comprising:
When the byte number of the varchar field is greater than or equal to the byte limit value of the data line, by the data line
Preceding 2 bytes are used to store the length of the varchar field, rear 4 bytes be used to store expression overflow field page number and
Indicate overflow field line number, and by the corresponding memory overflow page of the varchar field be divided into multiple groups it is different types of overflow
Page out is respectively used to store the character string of the varchar field.
6. the storage method of memory database varchar field according to claim 5, which is characterized in that every group different
The data line length of the overflow page of type is unequal.
7. a kind of storage device of memory database varchar field characterized by comprising
Data line constructs module, for constructing the fixed data line of multirow length, each data line point in memory database
Not to store a varchar field；
Overflow page configuration module is used for respectively each varchar field configuration memory overflow page；
Field data memory module, for being stored in the varchar field according to the byte number of each varchar field
In the data line, alternatively, being stored in the data line and memory overflow page.
8. the storage device of memory database varchar field according to claim 7, which is characterized in that each described
The memory overflow page of varchar field does not share.
9. the storage device of memory database varchar field according to claim 7 or 8, which is characterized in that in described
Each overflow field in overflow page is deposited, an at most overflow line is used.
10. the storage device of memory database varchar field according to claim 7, which is characterized in that the field
Data memory module includes:
First field sub-module stored is less than the byte limit value of the data line for the byte number when the varchar field
When, the 1st byte in the data line is stored to the length of the varchar field, other spaces of the data line are used
In the character string for storing the varchar field.
11. the storage device of memory database varchar field according to claim 7, which is characterized in that the field
Data memory module further include:
Second field sub-module stored is greater than or equal to the word of the data line for the byte number when the varchar field
When saving limit value, preceding 2 bytes of the data line are used to store the length of the varchar field, rear 4 bytes to be for depositing
Storage indicates the page number of overflow field and indicates the line number of overflow field, and by the corresponding memory overflow page of the varchar field
It is divided into the different types of overflow page of multiple groups, is respectively used to store the character string of the varchar field.
12. the storage device of memory database varchar field according to claim 11, which is characterized in that every group is not
The data line length of the overflow page of same type is unequal.
13. a kind of computer equipment characterized by comprising
Memory and processor communicate with each other connection, are stored in the memory between the memory and the processor
Computer instruction, the processor is by executing the computer instruction, thereby executing as described in any one of claim 1-6
Memory database varchar field storage method.
14. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the computer instruction is for making the computer execute such as memory database of any of claims 1-6
The storage method of varchar field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642903.4A CN109800230A (en) | 2018-12-29 | 2018-12-29 | A kind of storage method and device of memory database varchar field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811642903.4A CN109800230A (en) | 2018-12-29 | 2018-12-29 | A kind of storage method and device of memory database varchar field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109800230A true CN109800230A (en) | 2019-05-24 |
Family
ID=66558334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811642903.4A Pending CN109800230A (en) | 2018-12-29 | 2018-12-29 | A kind of storage method and device of memory database varchar field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109800230A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040128454A1 (en) * | 2002-12-26 | 2004-07-01 | Moti Altahan | Method and apparatus of memory management |
| CN1936864A (en) * | 2005-09-22 | 2007-03-28 | 康佳集团股份有限公司 | Non-fixed-length record data recognition method |
| CN101630992A (en) * | 2008-07-14 | 2010-01-20 | 中兴通讯股份有限公司 | Method for managing shared memory |
| CN104239234A (en) * | 2014-10-13 | 2014-12-24 | 合一网络技术(北京)有限公司 | High-efficiency local cache management and reading method |
-
2018
- 2018-12-29 CN CN201811642903.4A patent/CN109800230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040128454A1 (en) * | 2002-12-26 | 2004-07-01 | Moti Altahan | Method and apparatus of memory management |
| CN1936864A (en) * | 2005-09-22 | 2007-03-28 | 康佳集团股份有限公司 | Non-fixed-length record data recognition method |
| CN101630992A (en) * | 2008-07-14 | 2010-01-20 | 中兴通讯股份有限公司 | Method for managing shared memory |
| CN104239234A (en) * | 2014-10-13 | 2014-12-24 | 合一网络技术(北京)有限公司 | High-efficiency local cache management and reading method |
Non-Patent Citations (1)
| Title |
|---|
| 姜承尧: "《MySQL技术内幕 InnoDB存储引擎》", 31 May 2016, 《机械工业出版社》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150347019A1 (en) | Systems and methods for segmenting data structures in a memory system | |
| US20180101542A1 (en) | Method and apparatus for compressing metadata in a file system | |
| CN105677580A (en) | Method and device for accessing cache | |
| US11314689B2 (en) | Method, apparatus, and computer program product for indexing a file | |
| US8447897B2 (en) | Bandwidth control for a direct memory access unit within a data processing system | |
| CN104102586A (en) | Address mapping processing method and address mapping processing device | |
| CN105760395A (en) | Data processing method, device and system | |
| US10049035B1 (en) | Stream memory management unit (SMMU) | |
| CN105359142B (en) | Hash connecting method and device | |
| US20130061009A1 (en) | High Performance Free Buffer Allocation and Deallocation | |
| US11226778B2 (en) | Method, apparatus and computer program product for managing metadata migration | |
| EP3316543B1 (en) | Device and method of enhancing item access bandwidth and atomic operation | |
| CN109298888B (en) | Queue data access method and device | |
| CN111427885A (en) | Database management method and device based on lookup table | |
| CN107239542A (en) | A kind of data statistical approach, device, server and storage medium | |
| CN111221823B (en) | Data processing method and device based on link management table | |
| CN106919516B (en) | DDR address mapping system and method | |
| CN109800230A (en) | A kind of storage method and device of memory database varchar field | |
| CN115658561A (en) | Power distribution terminal memory management method and device, electronic equipment and storage medium | |
| CN112000482B (en) | Memory management method and device, electronic equipment and storage medium | |
| CN109885568B (en) | Hash index construction method and device of memory database | |
| US7133997B2 (en) | Configurable cache | |
| CN111177066A (en) | Method, device and medium for improving efficiency of accessing off-chip memory | |
| US11947512B2 (en) | Feedback-based inverted index compression | |
| CN113076178B (en) | Message storage method, device and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190524 |