CN107422992A - Journal store methods and system during a kind of SSD operations - Google Patents
Journal store methods and system during a kind of SSD operations Download PDFInfo
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- CN107422992A CN107422992A CN201710641083.6A CN201710641083A CN107422992A CN 107422992 A CN107422992 A CN 107422992A CN 201710641083 A CN201710641083 A CN 201710641083A CN 107422992 A CN107422992 A CN 107422992A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/062—Securing storage systems
- G06F3/0623—Securing storage systems in relation to content
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
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Abstract
This application discloses Journal store methods during a kind of SSD operations and system, including：Delta data corresponding with metadata increment are written in the increment DDR buffering areas of its corresponding default size；After increment DDR buffer area data volumes are write completely, the base data in the basic DDR buffering areas of the delta data in increment DDR buffering areas and its corresponding preset ratio are written in flash.The embodiment of the present invention is by designing delta data come identification metadata increment, delta data are written in the increment DDR buffering areas of its corresponding default size, and when increment DDR buffering areas write full, just the base data in the basic DDR buffering areas of delta data and its corresponding preset ratio are written in flash, the influence to SSD read-write efficiencies is reduced, JM data storage quantity when also reducing power down.
Description
Technical field
The present invention relates to Journal store methods during a kind of technical field of data storage, more particularly to SSD operations and it is
System.
Background technology
SSD will receive the order progress such as read, write from host ends and foramt related operation when running, and
It can newly be produced during operation or update such as L2P tables, trim bitmap and super block info system member numbers
According to, and Journal modules (JM) are exactly that can correctly be preserved during its operation and management system in the major function of SSD disks
Metadata, and can when upper electric normal recovery system metadata.Can correct management system metadata, just can guarantee that host
Correct operation to SSD data, so the effect of JM modules is most important, and when being related to the management of metadata, JM has again can
With efficiency and the place of performance boost.
By taking a kind of L2P tables this metadata as an example, in the prior art, when the operation of each user brings l2p change, JM
Module all sends to lookup manager modules and writes super page request, such way be real-time metadata more
Newly, the metadata brought by unexpected lower electricity will not be brought to lose, but such real-time update can influence to write process or other processes
Efficiency.
Therefore, how a kind of on the low influence of SSD readwrite performances, and Journal preservation sides during efficient SSD operations are provided
Method is that those skilled in the art needs to solve the problems, such as.
The content of the invention
In view of this, it is an object of the invention to provide Journal store methods during a kind of SSD operations and system, with drop
The low influence to SSD read-write efficiencies, JM data storage quantity when also reducing power down.Its concrete scheme is as follows：
Journal store methods during a kind of SSD operations, including：
Delta data corresponding with metadata increment are written to the increment DDR buffering areas of its corresponding default size
In；
When the increment DDR buffer area data volumes are write it is full after, by the delta data in the increment DDR buffering areas and with
Base data in the basic DDR buffering areas of its corresponding preset ratio are written in flash.
Optionally, the preset ratio be using rebuild times of metadata after system electrification, delta data volumes and
The ratio that base data volumes are calculated.
Optionally, in addition to：
Using the lba being stored in Journal in lower electric process, by its corresponding base numbers of delta data patch
According to.
Optionally, it is described after the increment DDR buffer area data volumes write full, by the increment DDR buffering areas
Base data in the basic DDR buffering areas of delta data and its corresponding preset ratio are written to the process in flash,
Including：
When delta data less than the default size of the increment DDR buffering areas, then utilize in the increment DDR buffering areas
Dummy data fill the remaining space in the increment DDR buffering areas, and the increment DDR buffer area data volumes are write completely, then will
Base data in the basic DDR buffering areas of delta data and its corresponding preset ratio in the increment DDR buffering areas
It is written in flash.
Optionally, the increasing that delta data corresponding with metadata increment are written to its corresponding default size
The process in DDR buffering areas is measured, including：
Delta data are written in the local buffer of its corresponding default size；
After the local buffer data volumes are write completely, the delta data in the local buffer are written to
In the increment DDR buffering areas of default size corresponding with the local buffer.
Optionally, process delta data being written in the local buffer of its corresponding default size,
Including：
Delta data are written in the first local buffer of its corresponding default size；
After the first local buffer data volumes are write completely, using ping-pang forms, delta data are write
Into the 2nd local buffer of its corresponding default size, so that delta data are alternately written into the first local
In buffer and the 2nd local buffer.
Optionally, the increasing that delta data corresponding with metadata increment are written to its corresponding default size
The process in DDR buffering areas is measured, including：
Delta data are written in the first increment DDR buffering areas of its corresponding default size；
After the first increment DDR buffer area data volumes are write completely, using ping-pang forms, delta data are write
Into the second increment DDR buffering areas of its corresponding default size, so that delta data are alternately written into first increment
In DDR buffering areas and the second increment DDR buffering areas.
The invention also discloses Journal during a kind of SSD operations to preserve system, including：
Cache memory module, for delta data corresponding with metadata increment to be written into its corresponding preset greatly
In small increment DDR buffering areas；
Flash memory modules, for after the increment DDR buffer area data volumes write full, by the increment DDR buffering areas
In delta data and its corresponding preset ratio basic DDR buffering areas in base data be written in flash.
Optionally, the cache memory module, including：
Local buffer sub-module storeds, for delta data to be written to the local of its corresponding default size
In buffer；
Buffer memory submodule, for after the local buffer data volumes write full, by the local buffer
In delta data be written in the increment DDR buffering areas of default size corresponding with the local buffer.
Optionally, the cache memory module, including：
First buffer memory unit, for delta data to be written to the first increment DDR of its corresponding default size
In buffering area；
Second buffer memory unit, for after the first increment DDR buffer area data volumes write full, utilizing ping-
Pang forms, delta data are written in the second increment DDR buffering areas of its corresponding default size, so that delta numbers
According to being alternately written into the first increment DDR buffering areas and the second increment DDR buffering areas.
In the present invention, Journal store methods when SSD is run, including：Will delta data corresponding with metadata increment
It is written in the increment DDR buffering areas of its corresponding default size；After increment DDR buffer area data volumes are write completely, by increment
Base data in the basic DDR buffering areas of delta data and its corresponding preset ratio in DDR buffering areas are written to
In flash.Delta data are written to and its phase by the embodiment of the present invention by designing delta data come identification metadata increment
In the increment DDR buffering areas for the default size answered, and when increment DDR buffering areas write full, just by delta data and with its phase
Base data in the basic DDR buffering areas for the preset ratio answered are written in flash, reduce the shadow to SSD read-write efficiencies
Ring, JM data storage quantity when also reducing power down.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Journal store method schematic flow sheets when Fig. 1 is a kind of SSD operations disclosed in the embodiment of the present invention；
Journal store method schematic flow sheets when Fig. 2 is another SSD operations disclosed in the embodiment of the present invention；
Journal preserves system structure diagram when Fig. 3 is a kind of SSD operations disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the invention discloses Journal store methods during a kind of SSD operations, shown in Figure 1, this method bag
Include：
Step S11：Delta data corresponding with metadata increment are written to the increment of its corresponding default size
In DDR buffering areas.
Specifically, pre-establishing the corresponding relation of delta data and metadata increment, delta Data Identification member numbers are utilized
According to increment, wherein, each delta data can be 8 bytes, and the default size of increment DDR buffering areas can be 4K.
Wherein, the increment DDR bufferings of its corresponding default size can be written in real time for guarantee delta data
Area, establishes ping-pang increment DDR buffering areas, and specific ablation process includes step S111 and step S112；Wherein,
Step S111：Delta data are written in the first increment DDR buffering areas of its corresponding default size.
Specifically, first delta data can be written in the first increment DDR buffering areas of its corresponding 4K sizes.
Step S112：After the first increment DDR buffer area data volumes are write completely, using ping-pang forms, by delta numbers
According to being written in the second increment DDR buffering areas of its corresponding default size, so that delta data are alternately written into the first increment
In DDR buffering areas and the second increment DDR buffering areas.
Specifically, after the first increment DDR buffer area data volumes write full, using ping-pang forms, the second increasing is switched to
DDR buffering areas are measured, delta data are written in the second increment DDR buffering areas, now the first increment DDR buffering areas are then carried out
After need to operate, discharge data therein, when the second increment DDR buffer area data volumes are write it is full after, should in the first increment DDR buffering areas
The no data is preserved, and therefore, delta data are continued to write into the first increment DDR buffering areas, and now the second increment DDR is buffered
Qu Ze carry out after need to operate, discharge data therein, with this realize delta data be alternately written into the first increment DDR buffering areas and
In second increment DDR buffering areas.
Step S12：When increment DDR buffer area data volumes are write it is full after, by the delta data in increment DDR buffering areas and with
Base data in the basic DDR buffering areas of its corresponding preset ratio are written in flash.
Specifically, after delta data are write completely in increment DDR buffering areas, then the basic DDR of corresponding preset ratio is delayed
The base data rushed in area, which are also together written in flash, to be preserved, wherein, preset ratio is to utilize first number after system electrification
According to the ratio that is calculated of rebuild times, delta data volumes and base data volumes, metadata after system electrification
The rebuild times need upper plate debugging to draw, for example, preset ratio is 1 to 3, i.e. whenever a delta data write flash
In once, then also three parts of base data are write in flash, form 1 to 3 relation, every part of size of data can be 4K, certainly
Preset ratio can also be adjusted according to practical application request, and then ensure the rebuild times in an OK range.
Wherein, when electric situation under generation, delta data are less than the default of increment DDR buffering areas in increment DDR buffering areas
Size, write-in flash actions can not be triggered, and need the base data by delta data and corresponding preset ratio to be written to
In flash, then the remaining space in dummy data filling increment DDR buffering areas can be utilized, by increment DDR buffer datas
Amount is write completely, then by the basic DDR buffering areas of the delta data in increment DDR buffering areas and its corresponding preset ratio
Base data are written in flash, to ensure that increment DDR buffering areas do not have delta loss of datas.
In practical application, except the normal preservation process of power-up state, lower electric process can also be included；Utilized in lower electric process
The lba being stored in Journal, by its corresponding base data of delta data patch, during preservation, due to that may go out
Existing base data fail to be saved in flash, but delta data corresponding thereto have been saved in flash, now, then may be used
To utilize the lba being stored in Journal, delta data corresponding with the base data lost are found, and will be newest
Delta data patch is to its corresponding base Data Positions, so as to ensure the integrality of base data.
It is understood that because data storage location changes, it is therefore desirable to be in advance the good lba of data distribution
(Logical Block Address, logical block addresses), lba can utilize base data and the data volume of delta data
Proportionate relationship can calculate the lba quantity that every kind of metadata needs in whole ssd, for example, calculating lba scopes such as with 8T disc gages
Under：User's LBA range：[0,512M-1], metadata LBA range：[512M, 512M+512K-1], delta data LBA range：
[512M+512K,512M+4/3*512K-1]。
It should be noted that metadata can include first numbers such as L2P tables, trim bitmap and super block info
According to every kind of metadata has its corresponding delta data, and also all possessing has respective increment DDR buffering areas, Mei Zhongyuan
The preservation process of data is all identical with above-mentioned preservation process.
It can be seen that delta data are written to by the embodiment of the present invention by designing delta data come identification metadata increment
In the increment DDR buffering areas of its corresponding default size, and when increment DDR buffering areas write full, just by delta data and
Base data in the basic DDR buffering areas of its corresponding preset ratio are written in flash, are reduced to read and write SSD and are imitated
The influence of rate, JM data storage quantity when also reducing power down.
The embodiment of the invention discloses Journal store methods during a kind of specific SSD operations, implement relative to upper one
Example, the present embodiment have made further instruction and optimization to technical scheme.It is shown in Figure 2, specifically：
Step S21：Delta data are written in the local buffer of its corresponding default size.
Specifically, in order to further improve delta writing speeds, first delta data are written to corresponding to its
Default size local buffer in, wherein, local buffer can also be ping-pang local buffer, tool
Body elta data write-in local buffer process includes step S211 and step S212：
Step S211：Delta data are written in the first local buffer of its corresponding default size.
Step S212：After the first local buffer data volumes are write completely, using ping-pang forms, by delta data
It is written in the 2nd local buffer of its corresponding default size, so that delta data are alternately written into the first local
In buffer and the 2nd local buffer.
Wherein, local buffer default size can be 256 bytes, naturally it is also possible to be entered according to practical application request
The regulation of row size.
Step S22：After local buffer data volumes are write completely, the delta data in local buffer are written to
In the increment DDR buffering areas of default size corresponding with local buffer.
It is understood that by the way that first delta data are written in local buffer, then by local buffer
Delta data be written to speed in corresponding increment DDR buffering areas, be faster than and delta data be directly written to increment DDR
The speed of buffering area, the further speed for improving delta data write-in flash, Journal preserves effect when improving SSD operations
Rate.
Step S23：When increment DDR buffer area data volumes are write it is full after, by the delta data in increment DDR buffering areas and with
Base data in the basic DDR buffering areas of its corresponding preset ratio are written in flash.
Accordingly, the embodiment of the invention also discloses Journal during a kind of SSD operations to preserve system, shown in Figure 3,
The system includes：
Cache memory module 11, for delta data corresponding with metadata increment to be written into its corresponding preset
In the increment DDR buffering areas of size；
Flash memory modules 12, for after increment DDR buffer area data volumes write full, by increment DDR buffering areas
Base data in the basic DDR buffering areas of delta data and its corresponding preset ratio are written in flash.
Wherein, preset ratio is to utilize the rebuild times of metadata, delta data volumes and base numbers after system electrification
The ratio being calculated according to amount.
It can be seen that delta data are written to by the embodiment of the present invention by designing delta data come identification metadata increment
In the increment DDR buffering areas of its corresponding default size, and when increment DDR buffering areas write full, just by delta data and
Base data in the basic DDR buffering areas of its corresponding preset ratio are written in flash, are reduced to read and write SSD and are imitated
The influence of rate, JM data storage quantity when also reducing power down.
In the embodiment of the present invention, above-mentioned cache memory module 11, local buffer sub-module storeds, caching can be included
Sub-module stored, the first buffer memory unit and the second buffer memory unit；Wherein,
Local buffer sub-module storeds, for delta data to be written to the local of its corresponding default size
In buffer；
Buffer memory submodule, for after local buffer data volumes write full, by the delta in local buffer
Data are written in the increment DDR buffering areas of default size corresponding with local buffer.
First buffer memory unit, for delta data to be written to the first increment DDR of its corresponding default size
In buffering area；
Second buffer memory unit, for after the first increment DDR buffer area data volumes write full, utilizing ping-pang shapes
Formula, delta data are written in the second increment DDR buffering areas of its corresponding default size, so that delta data replace
Write in the first increment DDR buffering areas and the second increment DDR buffering areas.
Specifically, above-mentioned local buffer sub-module storeds, can include the first local buffer memory cell and
First local buffer memory cell；Wherein,
First local buffer memory cell, for delta data to be written into the of its corresponding default size
In one local buffer；
2nd local buffer memory cell, for after the first local buffer data volumes write full, utilizing ping-
Pang forms, delta data are written in the 2nd local buffer of its corresponding default size, so that delta numbers
According to being alternately written into the first local buffer and the 2nd local buffer.
Above-mentioned flash memory modules 12, it can include supplying memory cell；Wherein
Supply memory cell, for when in increment DDR buffering areas delta data be less than the default big of increment DDR buffering areas
It is small, then the remaining space in increment DDR buffering areas is filled using dummy data, increment DDR buffer area data volumes are write completely, then
Base data in the basic DDR buffering areas of delta data in increment DDR buffering areas and its corresponding preset ratio are write
Enter into flash.
The embodiment of the present invention can also include lower electric module；Wherein,
Lower electric module, in lower electric process using the lba being stored in Journal, by delta data patch and its
Corresponding base data.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Journal store methods and system are described in detail when being run above to a kind of SSD provided by the present invention,
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is simply used
Understand the method and its core concept of the present invention in help；Meanwhile for those of ordinary skill in the art, according to the present invention's
Thought, there will be changes in specific embodiments and applications, in summary, this specification content should not be construed as
Limitation of the present invention.
Claims (10)
- A kind of 1. Journal store methods during SSD operations, it is characterised in that including：Delta data corresponding with metadata increment are written in the increment DDR buffering areas of its corresponding default size；When the increment DDR buffer area data volumes are write it is full after, by the delta data in the increment DDR buffering areas and with its phase Base data in the basic DDR buffering areas for the preset ratio answered are written in flash.
- 2. Journal store methods during SSD operations according to claim 1, it is characterised in that the preset ratio is profit With the ratio that the rebuild times of metadata, delta data volumes and base data volumes are calculated after system electrification.
- 3. Journal store methods during SSD operations according to claim 1, it is characterised in that also include：Using the lba being stored in Journal in lower electric process, by its corresponding base data of delta data patch.
- 4. Journal store methods during SSD operations according to claim 1, it is characterised in that described to work as the increment DDR buffer area data volumes write it is full after, by the delta data in the increment DDR buffering areas and its corresponding preset ratio Base data in basic DDR buffering areas are written to the process in flash, including：When delta data less than the default size of the increment DDR buffering areas, then utilize dummy in the increment DDR buffering areas Data fill the remaining space in the increment DDR buffering areas, and the increment DDR buffer area data volumes are write completely, then by described in Base data write-in in the basic DDR buffering areas of delta data and its corresponding preset ratio in increment DDR buffering areas Into flash.
- 5. Journal store methods during SSD operations according to claim 1, it is characterised in that described to increase with metadata The process that corresponding delta data are written in the increment DDR buffering areas of its corresponding default size is measured, including：Delta data are written in the local buffer of its corresponding default size；When the local buffer data volumes are write it is full after, the delta data in the local buffer are written to and institute Local buffer are stated to preset in the increment DDR buffering areas of size accordingly.
- 6. Journal store methods during SSD operations according to claim 5, it is characterised in that described by delta data The process being written in the local buffer of its corresponding default size, including：Delta data are written in the first local buffer of its corresponding default size；When the first local buffer data volumes are write it is full after, using ping-pang forms, by delta data be written to In 2nd local buffer of its corresponding default size, so that delta data are alternately written into the first local In buffer and the 2nd local buffer.
- Journal store methods when 7. the SSD according to any one of claim 1 to 6 is run, it is characterised in that described to incite somebody to action Delta data corresponding with metadata increment are written to the process in the increment DDR buffering areas of its corresponding default size, bag Include：Delta data are written in the first increment DDR buffering areas of its corresponding default size；When the first increment DDR buffer area data volumes are write it is full after, using ping-pang forms, by delta data be written to In second increment DDR buffering areas of its corresponding default size, so that delta data are alternately written into the first increment DDR and delayed Rush in area and the second increment DDR buffering areas.
- 8. Journal preserves system during a kind of SSD operations, it is characterised in that including：Cache memory module, for delta data corresponding with metadata increment to be written into its corresponding default size In increment DDR buffering areas；Flash memory modules, for after the increment DDR buffer area data volumes write full, by the increment DDR buffering areas Base data in the basic DDR buffering areas of delta data and its corresponding preset ratio are written in flash.
- Journal preserves system when 9. SSD is run according to claim 8, it is characterised in that the cache memory module, Including：Local buffer sub-module storeds, for delta data to be written to the local of its corresponding default size In buffer；Buffer memory submodule, for after the local buffer data volumes write full, by the local buffer Delta data are written in the increment DDR buffering areas of default size corresponding with the local buffer.
- Journal preserves system when 10. SSD is run according to claim 8 or claim 9, it is characterised in that the buffer memory mould Block, including：First buffer memory unit, the first increment DDR for delta data to be written to its corresponding default size are buffered Qu Zhong；Second buffer memory unit, for after the first increment DDR buffer area data volumes write full, utilizing ping-pang shapes Formula, delta data are written in the second increment DDR buffering areas of its corresponding default size, so that delta data replace Write in the first increment DDR buffering areas and the second increment DDR buffering areas.
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| CN108762989A (en) * | 2018-06-05 | 2018-11-06 | 郑州云海信息技术有限公司 | Date storage method, device, equipment and the readable storage medium storing program for executing of solid state disk |
| TWI647702B (en) * | 2017-12-08 | 2019-01-11 | 旺宏電子股份有限公司 | Memory controller, memory system, and method for managing data configuration in a memory |
| CN109669632A (en) * | 2018-12-10 | 2019-04-23 | 浪潮电子信息产业股份有限公司 | Metadata wiring method, device and medium based on distributed objects storage system |
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| CN111581126A (en) * | 2020-05-08 | 2020-08-25 | 苏州浪潮智能科技有限公司 | Method, device, equipment and medium for saving log data based on SSD |
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