CN106569742A - Storage management method and storage equipment - Google Patents
Storage management method and storage equipment Download PDFInfo
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- CN106569742A CN106569742A CN201610913693.2A CN201610913693A CN106569742A CN 106569742 A CN106569742 A CN 106569742A CN 201610913693 A CN201610913693 A CN 201610913693A CN 106569742 A CN106569742 A CN 106569742A
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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
- G06F3/0604—Improving or facilitating administration, e.g. storage management
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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
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0647—Migration mechanisms
- G06F3/0649—Lifecycle management
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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
- G06F3/0658—Controller construction arrangements
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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
- G06F3/0683—Plurality of storage devices
- G06F3/0688—Non-volatile semiconductor memory arrays
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
The invention relates to the computer field, particularly to a storage management technology. A storage management method comprises the steps of receiving a data reading instruction (including a logical address of a target data); searching from index data according to the logical address to obtain a target data region corresponding to the logical address and an initial life cycle number of the target data region; obtaining a life cycle number of the target data region; and when it is determined that the life cycle number is inconsistent with the initial life cycle number, not executing the data reading instruction. According to the storage management method, in the reading process, if the initial life cycle number of the target data region recorded by the index data is inconsistent with the current life cycle number, the data reading instruction is not executed; and namely, in the reading process, whether the index data is invalid or not can be identified through the life cycle number, and if the index data is invalid, the data reading instruction is not executed, so that wrong data reading can be avoided.
Description
Technical field
The application is related to computer realm, more particularly to storage management technique.
Background technology
At present, many computers (such as desktop computer), the storage medium of the controller of disk array may include SSD (Solid
State Disk, solid state hard disc).Relative to traditional mechanical hard disk, SSD has an excellent readwrite performance, but its capacity it is less (because
For expensive).So, SSD is widely used for as only read buffer, will access than more frequently hot spot data in mechanical hard disk
In being placed on SSD.
Above-mentioned hot spot data is identified using LBA (Logical Block Address, logical block addresses), is referred to
Fig. 1, storage system can divide the memory space of SSD into several segment (its size is about tens MB), and according to SSD
Storage address order from low to high numbered, every segment includes several block again.
After the memory space (amount of physical memory) that hot spot data is write SSD, physical storage address need to be set up and patrolled
Collect the relation between storage address.That is, need to set up positive index in Installed System Memory, to find accordingly from LBA
Segment and block.For example, it is assumed that the block x on the corresponding hot spot data write segment r of LBA a, then build
Attention to index a--->(r,x).In addition it is also necessary to set up a reverse indexing (find accordingly from segment and block
LBA).Still by taking the block x on the corresponding hot spot data write segment r of LBA a as an example, the reverse indexing that need to be set up is
(r,x)--->a。
After all segment are finished on SSD, need some segment releases.Corresponding to the segment being released
Positive index be invalid.Therefore, in reading the data, invalid positive index may be searched, and then is read
To the data of mistake.
The content of the invention
In order to solve the above problems, the application provides memory management method and storage device, to solve to read data procedures
In, invalid positive index may be searched, and then read the problem of the data of mistake.
For achieving the above object, the embodiment of the present invention provides following technical scheme：
On the one hand, embodiments herein provides a kind of memory management method, and the method is applied in storage device, described
Storage device includes processor and solid state hard disc (SSD), and the solid state hard disc includes multiple data areas, each data area bag
One or more blocks (block) are included, is object (such as storage dish, data area) in the method by the computing device
Initial Life Cycle issue is given, when the lifetime terminates or a new lifetime starts, gives the object new life cycle
Number.Before using the object, need more initial Life Cycle issue whether consistent with current Life Cycle issue.If differed
Cause, illustrate object invalidation, it is not continuing with, so can avoid reading the data of mistake.
In a possible design, above-mentioned object is specially data area, such as segment.Then above-mentioned processor institute
The step of execution, includes：Reception includes the reading data command of the logical address of target data；According to the logical address in index number
According to middle lookup, to obtain the initial Life Cycle issue of the corresponding target data area of the logical address and its, (index data includes should
Corresponding relation between logical address and the initial Life Cycle issue of target data area)；Obtain the target data area
Life Cycle issue, and when it is determined that the Life Cycle issue is inconsistent with the initial Life Cycle issue, do not perform above-mentioned reading
According to instruction.Additionally, when it is determined that above-mentioned Life Cycle issue is identical with initial Life Cycle issue, then reading above-mentioned target data area
The target data of middle storage.It can be seen that, in reading process, if the initial life cycle of the target data area of index data record
When number Life Cycle issue current from target data area is different, reading data command can not be performed.That is, reading in the present invention
Cheng Zhong, can go to recognize whether index data is invalid, if invalid, does not perform reading data command, so as to can by Life Cycle issue
Avoid reading the data of mistake.
In a possible design, when it is determined that above-mentioned Life Cycle issue is inconsistent with initial Life Cycle issue, process
Device can also delete the corresponding index data of above-mentioned logical address.Can so avoid reading invalid index data, improve and read effect
Rate.
In a possible design, before data command is read in above-mentioned reception, storage device can also carry out target data
Write.Its ablation process may include：Processor is received and writes data command (including target data and its logical address), it is determined that should
The corresponding target data area of target data and its initial Life Cycle issue, and above-mentioned logical address is preserved with initial life cycle
Corresponding relation between number is to aforementioned index data.In one example, can be target data area after write target data
One initial Life Cycle issue of distribution.When dispatching from the factory, or it is each data field when initializing SSD first in another example
Primitive life week issue (generally 0) is distributed in domain.During using SSD, understand on the basis of all issues of primitive life,
Carry out monotonic increase or monotone decreasing.After write target data, it is possible to use the Life Cycle issue at that time of target data area
As initial Life Cycle issue.From unlike existing storage management mode, existing storage management mode establishes positive index
And reverse indexing.And in the present embodiment, storage device is established first comprising target data area after write target data
The index data of beginning Life Cycle issue, the index data in the present embodiment is indexed similar to existing forward direction, but by comparison, and
Increased the corresponding relation between logical address and initial Life Cycle issue.Meanwhile, it is anti-before no longer safeguarding in the present embodiment
To index, reduce memory consumption and reduce management complexity.
In a possible design, after ablation process, before reading process, storage device is also possible to carry out data
The release in region.The release process may include：The instruction of release target data area is received, above-mentioned initial Life Cycle issue is repaiied
It is changed to above-mentioned Life Cycle issue.In one example, initial Life Cycle issue can be increased m, obtains new Life Cycle issue.m
Can be positive integer or negative integer.Compared with existing delivery mode, the delivery mode that the embodiment of the present invention is provided only needs to modification
Initial Life Cycle issue, it is to avoid the operation of complexity, improves treatment effeciency.
In a possible design, storage device is also possible to carry out data deletion.Then in one example, process is deleted
May include：Receive and delete data command, the deletion data command includes the logical address of the target data；By the logic
It is invalid that the corresponding index data in address is set to.In existing storage mode, when needing to delete the corresponding target datas of LBA a
When, it is assumed that the corresponding positive indexes of LBA a are a--->(r, x), reverse indexing is (r, x) --->A, then need first from positive rope
Draw a to find (r, x), then deactivate reverse indexing (r, x) --->A, finally deactivates positive index a--->(r,x).Phase therewith
Than in the present embodiment, it is invalid to be directly set to the corresponding index data of logical address, so as to greatly reduce operation
Step.
On the other hand, a kind of storage device is embodiments provided, the storage device has realizes said method reality
The function of storage device behavior in border.The function can be realized by hardware, it is also possible to perform corresponding software by hardware
Realize.The hardware or software include one or more modules corresponding with above-mentioned functions.
In a possible design, the structure of storage device includes：Processor and memory, the processor is by fortune
Software program that row is stored in the memory, the data being stored in the memory are called, perform above-mentioned storage device
Performed method.
Another further aspect, embodiments provides a kind of computer-readable storage medium, for saving as above-mentioned storage device
Computer software instructions used, it includes the program for performing designed by above-mentioned aspect.
In the present invention, in reading process, if the initial Life Cycle issue of the target data area of index data record
When the Life Cycle issue current from target data area is different, reading data command can not be performed.That is, in reading process of the present invention
In, can go to recognize whether index data is invalid, if invalid, reading data command is not performed, so as to keep away by Life Cycle issue
Exempt from the data for reading mistake.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the application
Example, for those of ordinary skill in the art, without having to pay creative labor, can be with according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is positive and negative index schematic diagram；
A kind of applied environment schematic diagram that Fig. 2 a are provided for the embodiment of the present application；
Fig. 2 b are a kind of exemplary block diagram of storage device that the embodiment of the present application is provided；
Fig. 3 is the general computer architecture schematic diagram of the controller of storage device provided in an embodiment of the present invention；
The memory management method exemplary process diagram that Fig. 4,6-9 are provided for the embodiment of the present application；
The index data schematic diagram that Fig. 5 is provided for the embodiment of the present application；
Figure 10 is storage device provided in an embodiment of the present invention another kind example arrangement schematic diagram.
Specific embodiment
The embodiment of the present application memory management method to be protected and storage device.Above-mentioned storage device concretely disk array
Deng.
A kind of composition figure of the storage device that Fig. 2 a are described is referred to, it includes controller 201 and hard disk chassis 202.
Controller 201 can be a kind of computing device, such as server, desktop computer.Install on controller 201
There are operating system and other application programs.Controller 201 can receive input and output (I/O) request from applied host machine,
The data carried in storage I/O requests, and write data in hard disk chassis 202.Under an application scenarios, controller 201 can
To be connected with applied host machine (not shown) by SAN network.The structural representation of controller 201 can be found in Fig. 3.
Hard disk chassis 202 then may include one or more hard disks, wherein, Fig. 2 b are referred to, at least one hard disk is solid-state
Hard disk 21 (Solid State Device, SSD).Certainly, SSD also may be installed in the slot of controller 201.
Fig. 3 is a kind of topology example figure of controller noted above 201, as shown in figure 3, controller 201 may include by bus
Connected processor 1, internal memory 2, communication interface 3 (front end interface card and back end interface card can be further included), and input set
For 4 and output equipment 5.
Wherein, front end interface card can be used to be communicated with applied host machine, and the processor 1 of controller 201 can be by front termination
The various operational orders of applied host machine are received in mouth clamping.
The processor 1 of a controller 201 possibly central processor CPU, or specific integrated circuit ASIC
(Application Specific Integrated Circuit), or be arranged to implement the one of the embodiment of the present invention
Individual or multiple integrated circuits.In embodiments of the present invention, the processor 1 of controller 201 can be used for receiving from applied host machine
Write data requests either read data request, process write data request or read data request, ask write data
Or read data request is sent to solid state hard disc 21 and other operations.
Internal memory 2, for depositing program, in addition, the internal memory 2 in the present embodiment can for example be used with the function of integrated cache of memory
The data received from applied host machine in caching or the data read from solid state hard disc 21.Exemplary, controller 201 receives application
During multiple write data requests that main frame sends, temporarily the plurality of write data requests can be stored in internal memory 2, when internal memory 2
Capacity when reaching waterline, sending it to solid state hard disc 21 carries out persistent storage.
Internal memory 2 may include high-speed RAM memory, it is also possible to also including nonvolatile memory (non-volatile
Memory), for example, at least one magnetic disc store.It is understood that internal memory 2 can be random access memory (Random-
Access Memory, RAM), magnetic disc, hard disk, CD, solid state hard disc (Solid State Disk, SSD) or non-volatile
Memory etc. is various can be with non-transitory (non-transitory) machine readable media of store program codes.Need explanation
, internal memory 2 and caching can also be provided separately in embodiment.
Back end interface card can be used to be communicated with solid state hard disc 21, and the processor 1 of controller 201 can pass through back end interface card
Send the data to solid state hard disc 21 to store.
Solid state hard disc 21 further may include SSD controller and storage medium.Wherein, SSD controller is for performing process
The operations such as the write data requests or read data request of the transmission of device 1.
It should be noted that controller 201 belongs to system controller, different from the controller of SSD itself.
More specifically, flash memory translation layer (Flash Translation Layer, FTL) is included in SSD controller, in FTL
Preserve the corresponding relation between the logical address of data and physical address.Therefore, FTL is used for write data requests or reading
The physical address that data are stored in SSD is converted into according to the logical address carried in request, data are stored in the physical address of SSD can
Being actual address that the data are stored in SSD, it is also possible to only right through virtualization on the basis of the actual address
The visible address of SSD controller (system controller is invisible).
Storage medium in solid state hard disc is generally made up of several flash memory flash chips.If each flash chip includes
Dry block (block).Under normal circumstances the normal capacity of block can be 2 Nth power (M), wherein, N is positive integer.
Under normal circumstances, the block in SSD is sightless for system controller.The memory space of SSD is to system
What controller was presented is some sections of continuous logical spaces, in the present embodiment, for convenience, by one section of continuous logic
Space is referred to as a section (segment), and the address of the corresponding logical spaces of each segment is referred to as logical address.In SSD
Portion, corresponding one or more block of each segment.It should be noted that SSD controller does not perceive segment's
Exist.Segment is one section of logical space that system controller is perceived, one section of logical address of correspondence (also referred to as logical address area
Between).For example, the corresponding logical address interval of segment is 0MB-1023MB；Another segment is corresponding logically
Location interval is 1024MB-2047MB；The corresponding logical address intervals of another segment are 2048MB-3071MB, according to this class
Push away.
Below by the general character being related to based on invention described above aspect, to the embodiment of the present invention, how storage management is entered
Row is further described.
Fig. 4 shows a kind of interactive example flow process of memory management method provided in an embodiment of the present invention, to solve
Certainly reading may search invalid positive index during data, and then read the problem of the data of mistake.
Method shown in Fig. 4 is applied in the application scenarios shown in Fig. 2 a, the controller in storage device as shown in Figure 3
201 processor 1 is interacted with miscellaneous part.
The interaction flow includes：
In 401 parts：The processor 1 of controller 201 receives (from application system) reading data command.
Above-mentioned reading data command includes the logical address of target data.
More specifically, processor 1 can receive above-mentioned reading data command by the front end interface clamping of communication interface 3.
In one example, the logical address is LBA (Logical Block Address, logical block addresses).Such as nothing
Special declaration, subsequently will be described herein by taking LBA as an example.
In 402 parts：The processor 1 of controller 201 is according to above-mentioned logical address in (internal memory 2 is safeguarded) index data
Search, to obtain the initial Life Cycle issue of the corresponding target data area of the logical address and the target data area.
The corresponding index data of each logical address LBA is maintain in the internal memory 2 of controller 201.Fig. 5 is referred to, it is arbitrary
Index data includes the corresponding relation between logical address and the initial Life Cycle issue of data area, and logical address and thing
Corresponding relation between reason address.
Index data is to write set up after data in SSD.It is assumed that the corresponding data of LBA a are written with segment
In the block x of r, also, the initial Life Cycle issue of segment r is h, then the corresponding index datas of LBA a can be a--->
(r, x, h) or a--->(h,r,x).
If that read that data command includes is LBA a, the corresponding segment r of LBA a are target data area, index
Data a--->(r, x, h) or a--->The h of record is then the initial Life Cycle issue of target data area in (h, r, x).
To subsequently introduce how to set up index data herein.
In 403 parts：The processor 1 of controller 201 obtains the current Life Cycle issue in target data area；
In addition to index data, data area is also maintain in the internal memory 2 of controller 201 with current Life Cycle issue
Corresponding relation.
During SSD is initialized first, storage device can divide the memory space of SSD into several data area (its
Size is about tens MB), and the storage address order from low to high according to SSD numbered to data area, and safeguard
Each data area and the corresponding relation of Life Cycle issue.Due to data area larger (relative to block), so safeguarding data
The amount of ram very little that region consumes with the corresponding relation of Life Cycle issue.
In one example, it is assumed that have 100 data areas, data area is corresponding with current Life Cycle issue to close
System can be as shown in table 1 below：
| Data area identifies | Life Cycle issue |
| 1 | 10 |
| 2 | 20 |
| …… | |
| 100 | 3 |
Table 1
In one example, the processor 1 of controller 201 can search above-mentioned table 1, obtain the current life in target data area
The all issues of life.
The Life Cycle issue of data area can change, such as after certain data area is discharged, the life of the data area
The all issues of life can change, and subsequently it will be introduced herein.
In 404 parts：It is determined that the Life Cycle issue of the target data area for obtaining is inconsistent with initial Life Cycle issue
When, the processor 1 of controller 201 does not perform above-mentioned reading data command.
For example, if initial Life Cycle issue is h, and the current life cycle number of the target data area for obtaining is h+
M, then the two is inconsistent, then will not perform reading data command.
Additionally, if the current Life Cycle issue in target data area for obtaining is inconsistent with initial Life Cycle issue, can
Confirm that the index data is invalid, then will be unable to read data from SSD.Now, data can be read from other storage mediums.
How data are read from other storage mediums, can refer to existing mode, therefore not to repeat here.
Certainly, if the Life Cycle issue of the target data area for obtaining is consistent with initial Life Cycle issue, perform above-mentioned
Read data command.
It can be seen that, in the reading process of the present embodiment, if the initial Life Cycle of the target data area of index data record
When the issue Life Cycle issue current from target data area is different, reading data command can not be performed.That is, in present invention reading
During, can go to recognize whether index data is invalid, if invalid, does not perform reading data command by Life Cycle issue, so as to
Can avoid reading the data of mistake.
Additionally, in other embodiments of the present invention, Fig. 4 is still referred to, above-mentioned interaction may also include：
In 405 parts：The processor 1 of controller 201 deletes the corresponding index number of logical address in above-mentioned reading data command
According to.
Can so avoid subsequent processor 1 from reading invalid index data, improve reading efficiency.
Fig. 6 is another kind of interactive example flow process of memory management method provided in an embodiment of the present invention.The present embodiment
Focus on introducing the ablation process of above-mentioned target data.
Method shown in Fig. 6 can be applicable in the application scenarios shown in Fig. 2 a, mainly in storage device as shown in Figure 3
The processor 1 of controller 201 is interacted with miscellaneous part and completed.
The interaction flow includes：
In 601 parts：The processor 1 of controller 201 receives (from application system) and writes data command.
This is write data command and includes above-mentioned target data and logical address.
More specifically, processor 1 can write data command by the way that the front end interface clamping of communication interface 3 receipts are above-mentioned.
In 602 parts：Solid state hard disc 21 is sequentially (usually several for target data distribution block from free data area
The KB of KB to tens), target data is write in the block of distribution.
More specifically, the processor 1 of controller 201 can send the data to solid state hard disc 21 and deposit by back end interface card
Storage.SSD controller in solid state hard disc 21 is then sequentially (usually several for target data distribution block from free data area
The KB of KB to tens), target data is write in the block of distribution.
In 603 parts：The processor 1 of controller 201 determines the corresponding target data area of target data and the number of targets
According to the initial Life Cycle issue in region.
After write target data, it is possible to use target data area Life Cycle issue at that time is used as initial life cycle
Number.
For example, it is assumed that at the T0 moment, target data is write in the block x of segment r, then target data area
Domain is segment r, can by the above-mentioned table 1 of inquiry, obtain segment r (T0 moment) at that time Life Cycle issue h as first
Beginning Life Cycle issue.
Can be that an initial life cycle is distributed in target data area after write target data in another example
Number, and it is stored in above-mentioned table 1.
It is that each data area distribution one is original when dispatching from the factory, or when initializing SSD first in another example
Life Cycle issue (generally 0).During using SSD, cumulative or regressive can be carried out on the basis of all issues of primitive life
(follow-up herein to introduce), by the result of cumulative or regressive above-mentioned table 1 is stored in.
In 604 parts：The processor 1 of controller 201 preserves the initial life of above-mentioned logical address and target data area
Corresponding relation between all issues is to above-mentioned index data.
In 604 parts, it is assumed that the corresponding target datas of LBA a are write in the block x of segment r, and
Segment r current Life Cycle issue is h, then the index data being created that is a--->(r, x, h) or a--->(h,r,x).
From unlike existing storage management mode, existing storage management mode establishes positive index and reverse indexing.
And in the present embodiment, storage device establishes the initial life cycle comprising target data area after write target data
Number index data, the index data in the present embodiment by comparison, increased logic again similar to existing positive index
Corresponding relation between address and initial Life Cycle issue.Meanwhile, in the present embodiment, reverse indexing is no longer safeguarded, also reduce
Memory consumption simultaneously reduces management complexity.
It should be noted that in some existing storage management modes, needing when needing to discharge the segment on SSD
To use reverse indexing：It is assumed that needing to discharge segment r, now need to be found on segment r respectively according to reverse indexing
The corresponding LBA of block, further according to the LBA for searching, the positive index by segment corresponding to r all deactivates (deletion),
Finally again segment r are labeled as into the free time.
But, the reverse indexing of each block to LBA from segment is safeguarded, need to consume a large amount of internal memories, additionally, space
Management complexity is also higher.
The embodiment of the present invention shown in Fig. 7, there is provided be related to discharge the interactive example flow process of data area.
Method shown in Fig. 7 is applied in the application scenarios shown in Fig. 2 a, the controller in storage device as shown in Figure 3
201 processor 1 is interacted with miscellaneous part.
The interaction flow includes：
In 700 parts：The processor 1 of controller 201 receives the instruction of release target data area；
The instruction of release target data area is storage device internal trigger.In practice, storage device can be detected
Data area has been used up, and will select, by some segment releases, subsequently to write to receive new data.
In 701 parts：The processor 1 of controller 201 changes initial Life Cycle issue.
In one example, initial Life Cycle issue can be increased m, obtains new Life Cycle issue.M can for positive integer or
Negative integer.More specifically, m desirable+1.
Continue to use the example of above-mentioned table 1, it is assumed that release is data area 1, then by the initial Life Cycle issue of data area 1
10 plus m, then (10+m) is preserved to table 1.
It is aforementioned to be referred to, it is that a primitive life week is distributed in each data area when initializing SSD when dispatching from the factory or first
Issue (generally 0).During using SSD, can carry out monotonic increase or dullness passed on the basis of all issues of primitive life
Subtract.Then in another example, a data area can be often discharged, then monotonic increase m on the basis of all issues of primitive life.
700 parts are implemented in and are preserving right between the logical address and the initial Life Cycle issue of target data area
Should be related to the index data (namely after 604 parts), receive read data command before (namely 601 parts it
Before).
Compared with existing delivery mode, the delivery mode that the embodiment of the present invention is provided only needs to change initial life cycle
Number, it is to avoid complicated operation, improve treatment effeciency.
In addition to read/write data, release data area, storage device is also possible to carry out delete target data, re-writes target
Data etc. are operated.
Based on index data provided in an embodiment of the present invention, Fig. 8 shows the interactive example for being related to delete target data
Property flow process.
Method shown in Fig. 8 is applied in the application scenarios shown in Fig. 2 a, the controller in storage device as shown in Figure 3
201 processor 1 is interacted with miscellaneous part.
The interaction flow includes：
In 801 parts：The processor 1 of controller 201 receives (from application system) deletion data command.
The deletion data command includes the logical address of above-mentioned target data.
More specifically, processor 1 can receive above-mentioned deletion data command by the front end interface clamping of communication interface 3.
In 802 parts：It is invalid that the processor 1 of controller 201 is set to the corresponding index data of above-mentioned logical address.
In one example, the corresponding index data of above-mentioned logical address can be deleted.
It should be noted that in existing storage mode, when needing to delete the corresponding target datas of LBAa, it is assumed that
The corresponding positive indexes of LBAa are a--->(r, x), reverse indexing is (r, x) --->A, then need first to find from positive index (r,
X), then reverse indexing (r, x) is deactivated --->A, finally deactivates positive index a--->(r,x).
By comparison, in the present embodiment, it is invalid to be directly set to the corresponding index data of logical address, so as to
Operating procedure can be greatly reduced.
It is assumed that the data of LBA a need to write SSD again because being updated, based on index number provided in an embodiment of the present invention
According to Fig. 9 shows and is related to the interactive example flow process for being repeatedly written target data.
Method shown in Fig. 9 is applied in the application scenarios shown in Fig. 2 a, the controller in storage device as shown in Figure 3
201 processor 1 is interacted with miscellaneous part.
The interaction flow includes：
In 901 parts：The processor 1 of controller 201 receives (from application system) and writes data command.
This is write data command and includes above-mentioned target data and logical address.
901 parts are identical with 601 parts, and therefore not to repeat here.
In 902 parts：SSD controller is sequentially target data distribution from free data area in solid state hard disc 21
Block (usually a few KB of KB to tens), target data is write in the block of distribution.
It is assumed that before the corresponding target datas of LBA a are written to the block x on segment r, process is being repeatedly written
In, be target data distribution be block y on segment s, then the corresponding target datas of LBA a can be written to
Blocky on segment s.
It should be noted that to lift SSD performances and life-span, write all orders are carried out.Therefore, if desired repeat to write
Enter target data, then need to redistribute memory space.
In 903 parts：The processor 1 of memory controller 201 determines the corresponding fresh target data area of target data and this is new
The initial Life Cycle issue of target data area.
Continue to use precedent, it is assumed that the block y being written to LBA a corresponding target datas on segment s, then
Segment s are fresh target data area, and look-up table 1 can obtain the corresponding Life Cycle issues of segment s as initial life
All issues, it may be assumed that the initial Life Cycle issue of segment s is i.
In 904 parts：The processor 1 of controller 201 preserves the initial life of above-mentioned logical address and fresh target data area
Corresponding relation between all issues of life is to above-mentioned index data.
Precedent is still continued to use, then by the corresponding index datas of LBA a by a--->(r, x, h) or a--->(h, r, x), is updated to
a--->(i, s, y) or a--->(s,y,i).
It should be noted that in existing storage mode, when needing to be repeatedly written, target data write is being distributed
Block in after, need first to find (r, x) from old positive index a, then deactivate reverse indexing (r, x) --->a.Finally, more
New positive index is a--->(s, y), and set up new reverse indexing (s, y) --->a.
By comparison, what the present embodiment was provided is repeatedly written the corresponding index data of the direct more new logical addresses of mode i.e.
Can, so as to operating procedure can be greatly reduced.
To sum up, core concept of the present invention is：Indicate for object (such as storage dish, data area) life-giving all issues
Its lifetime, in some cases, the lifetime terminates or when a new lifetime starts, and gives its new Life Cycle issue.
All objects using the object need to record the initial Life Cycle issue of the object, before using the object, need more initial
Life Cycle issue it is whether consistent with current Life Cycle issue.If inconsistent, object invalidation is illustrated, it is impossible to be continuing with.
In addition to the technical scheme that above-mentioned all embodiments are provided, the thought of the present invention applies also for such as storage dish
In storage management.If storage dish is released or damages, can add up m on the initial Life Cycle issue of storage dish, obtain new life
The all issues of life.When accessing the storage dish, whether comparable its initial Life Cycle issue is consistent with current life cycle number, such as differs
Cause, illustrate that storage dish is invalid, inaccessible.
The above-mentioned main angle from interaction between each device is described to scheme provided in an embodiment of the present invention.Can
To be understood by, each device, such as storage device, storage device etc. it comprises and perform each to realize above-mentioned functions
The corresponding hardware configuration of function and/or software module.Those skilled in the art should be readily appreciated that, public with reference to institute herein
The unit and algorithm steps of each example of the embodiment description opened, the present invention can be with hardware or the knot of hardware and computer software
Conjunction form is realizing.Certain function actually in the way of hardware or computer software drive hardware performing, depending on technology
The application-specific and design constraint of scheme.Professional and technical personnel can use different methods to each specific application
Realize described function, but this realization it is not considered that beyond the scope of this invention.
Figure 10 shows a kind of possible structural representation of storage device involved in above-described embodiment, including：
Receiver module 101, for receiving data command is read (including the logical address of target data)；
Searching modul 102, for being searched in index data according to above-mentioned logical address, to obtain above-mentioned logical address pair
The target data area answered and the initial Life Cycle issue of above-mentioned target data area.
Wherein, above-mentioned index data include above-mentioned logical address and above-mentioned target data area initial Life Cycle issue it
Between corresponding relation；
Acquisition module 103, for obtaining the Life Cycle issue of above-mentioned target data area；
Read module 104, for when it is determined that above-mentioned Life Cycle issue is inconsistent with above-mentioned initial Life Cycle issue, not holding
The above-mentioned reading data command of row.
Correlative detail refers to record described previously herein, and therefore not to repeat here.
In other embodiments of the present invention, Figure 10 is still referred to, above-mentioned storage device may also include writing module 105, is used
In：
Data command (can receive by receiver module 101) is write in reception, and above-mentioned data command of writing is including above-mentioned target data
And the logical address of above-mentioned target data；Wherein, above-mentioned data command of writing is to receive reading data in above-mentioned receiver module 101 to refer to
Receive before order；
Determine the initial Life Cycle issue of the corresponding target data area of above-mentioned target data and above-mentioned target data area
(target data area and initial Life Cycle issue can be determined by acquisition module 103)；
And, preserve the corresponding relation between above-mentioned logical address and the initial Life Cycle issue of above-mentioned target data area
To above-mentioned index data.
Additionally, writing module 105 can also carry out the aforesaid operation for being repeatedly written target data.
In other embodiments of the present invention, Figure 10 is still referred to, above-mentioned storage device may also include release module 106, is used
In after the instruction for receiving release target data area, above-mentioned initial Life Cycle issue is revised as into above-mentioned Life Cycle issue.
Wherein, the instruction for discharging target data area is to preserve logical address and target data area in writing module 105
Initial Life Cycle issue between corresponding relation to index data, receiver module 101 receive read data command before connect
Receive.
In other embodiments of the present invention, Figure 10 is still referred to, above-mentioned storage device may also include removing module 107, is used
In deletion data command (including the logical address of target data) is received (from application system), by above-mentioned logical address correspondence
Index data be set to it is invalid.
Wherein, receiver module 101 can be used for support storage device communicated with other devices, for example, for support deposit
Storage equipment is communicated with illustrating in Fig. 4, Fig. 6, Fig. 7, Fig. 8, Fig. 9 with other devices, for example, receive instruction.
Searching modul 102 can perform 402 parts shown in Fig. 4, and initial life cycle (is searched in 603 parts shown in Fig. 6
Number), 402 parts, 603 parts shown in Fig. 7, or, can perform 903 parts (searching initial Life Cycle issue) shown in Fig. 9.
Acquisition module 103 can perform 403 parts shown in Fig. 4 or 7.
Read module 104 can perform 404 parts and 405 parts shown in Fig. 4 or 7.
Writing module 105 can directly perform the 601-604 parts shown in Fig. 6 or 7, or can be held by interacting with other modules
601-604 parts shown in row Fig. 6 or 7.Additionally, writing module can be performed shown in Fig. 9 directly or by interacting with other modules
901-904 parts.
Release module 106 can be directly or by the 700-701 parts interacted with other modules shown in execution Fig. 7.
Removing module 107 can be directly or by the 801-802 parts interacted with other modules shown in execution Fig. 7.
The step of method or algorithm with reference to described by the disclosure of invention, can be realized in the way of hardware, also may be used
By be by computing device software instruction in the way of realizing.Software instruction can be made up of corresponding software module, software mould
Block can be stored on RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk,
In the storage medium of portable hard drive, CD-ROM or any other form well known in the art.A kind of exemplary storage medium
Coupled to processor, so as to enable a processor to from the read information, and can be to the storage medium write information.When
So, storage medium can also be the part of processor.Processor and storage medium may be located in ASIC.In addition, should
ASIC may be located in user equipment.Certainly, processor and storage medium can also be present in user equipment as discrete assembly
In.
Those skilled in the art it will be appreciated that in said one or multiple examples, work(described in the invention
Be able to can be realized with hardware, software, firmware or their any combination.When implemented in software, can be by these functions
It is stored in computer-readable medium or is transmitted as one or more instructions on computer-readable medium or code.
Computer-readable medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to from a place to another
Any medium of one place transmission computer program.Storage medium can be universal or special computer can access it is any
Usable medium.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements on the basis of technical scheme, done etc. all should
It is included within protection scope of the present invention.
Claims (12)
1. a kind of memory management method, it is characterised in that methods described is applied in storage device, the storage device includes place
Reason device and solid state hard disc, the solid state hard disc includes multiple data areas, and each data area includes one or more blocks
(block), methods described is comprised the following steps by the computing device：
Receive and read data command, the reading data command includes the logical address of target data；
Searched in index data according to the logical address, to obtain the corresponding target data area of the logical address and institute
The initial Life Cycle issue of target data area is stated, the index data includes the logical address and the target data area
Initial Life Cycle issue between corresponding relation；
Obtain the Life Cycle issue of the target data area；
When it is determined that the Life Cycle issue is inconsistent with the initial Life Cycle issue, the reading data command is not performed.
2. method according to claim 1, it is characterised in that also include：
When it is determined that the Life Cycle issue is inconsistent with the initial Life Cycle issue, the corresponding rope of the logical address is deleted
Argument evidence.
3. method according to claim 1 and 2, it is characterised in that it is described receive read data command before also include：
Data command is write in reception, and write data instruction includes the logical address of the target data and the target data；
Determine the initial Life Cycle issue of the corresponding target data area of the target data and the target data area；
The corresponding relation between the logical address and the initial Life Cycle issue of the target data area is preserved to the rope
Argument evidence.
4. method according to claim 3, it is characterised in that preserve the logical address and the target data described
Corresponding relation between the initial Life Cycle issue in region to the index data, read before data command also by described reception
Including：
Receive the instruction of the release target data area；
The initial Life Cycle issue is revised as into the Life Cycle issue.
5. method as claimed in claim 4, it is characterised in that described that the initial Life Cycle issue is revised as into the life
All issues include：
The initial Life Cycle issue is increased into m, the Life Cycle issue is obtained；The m is positive integer or negative integer.
6. the method for claim 1, it is characterised in that also include：
Receive and delete data command, the deletion data command includes the logical address of the target data；
It is invalid that the corresponding index data of the logical address is set to.
7. the method for claim 1, it is characterised in that also include：
When it is determined that the Life Cycle issue is identical with the initial Life Cycle issue, reads in the target data area and store
Target data.
8. a kind of storage device, it is characterised in that including solid state hard disc, the solid state hard disc includes multiple data areas, each
Data area includes one or more blocks (block)；
The storage device also includes：
Receiver module, for receiving data command is read, and the reading data command includes the logical address of target data；
Searching modul, for being searched in index data according to the logical address, to obtain the corresponding mesh of the logical address
Mark data area and the initial Life Cycle issue of the target data area, the index data includes the logical address and institute
State the corresponding relation between the initial Life Cycle issue of target data area；
Acquisition module, for obtaining the Life Cycle issue of the target data area；
Read module, for when it is determined that the Life Cycle issue is inconsistent with the initial Life Cycle issue, not performing described
Read data command.
9. equipment as claimed in claim 8, it is characterised in that the read module is additionally operable to：It is determined that the life cycle
When number inconsistent with the initial Life Cycle issue, the corresponding index data of the logical address is deleted.
10. equipment as claimed in claim 8 or 9, it is characterised in that also including writing module, be used for：
Data command is write in reception, and write data instruction includes the logical address of the target data and the target data；
Determine the initial Life Cycle issue of the corresponding target data area of the target data and the target data area；And, protect
The corresponding relation between the logical address and the initial Life Cycle issue of the target data area is deposited to the index data；
Wherein, write data instruction was received before the receiver module receives reading data command.
11. equipment as claimed in claim 10, it is characterised in that also include：
Release module, for after the instruction for receiving the release target data area, the initial Life Cycle issue being changed
For the Life Cycle issue；Wherein, the instruction of the release target data area is to preserve described in said write module
Corresponding relation between logical address and the initial Life Cycle issue of the target data area to the index data, institute
State receiver module and receive and read what is received before data command.
12. equipment as claimed in claim 10, it is characterised in that the initial Life Cycle issue is being revised as into the life
The aspect of all issues, the release module is used for：
The initial Life Cycle issue is increased into m, the Life Cycle issue is obtained；The m is positive integer or negative integer.
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| CN201610913693.2A CN106569742B (en) | 2016-10-20 | 2016-10-20 | Memory management method and storage equipment |
| PCT/CN2017/081335 WO2018072420A1 (en) | 2016-10-20 | 2017-04-21 | Storage management method and storage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610913693.2A CN106569742B (en) | 2016-10-20 | 2016-10-20 | Memory management method and storage equipment |
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| WO2018072420A1 (en) * | 2016-10-20 | 2018-04-26 | 华为技术有限公司 | Storage management method and storage device |
| CN108196980A (en) * | 2017-12-28 | 2018-06-22 | 深圳市得微电子有限责任公司 | Mistakenly deleted data recovery method, flash memory device and computer readable storage medium |
| CN110703992A (en) * | 2019-09-20 | 2020-01-17 | 上海新储集成电路有限公司 | Method and system for accelerating reading and writing speed of mechanical hard disk |
| CN110928495A (en) * | 2019-11-12 | 2020-03-27 | 杭州宏杉科技股份有限公司 | Data processing method and device on multi-control storage system |
| CN113312443A (en) * | 2021-05-06 | 2021-08-27 | 天津大学深圳研究院 | Novel memory-based in-memory retrieval and table lookup construction method |
| WO2021196623A1 (en) * | 2020-04-01 | 2021-10-07 | 长鑫存储技术有限公司 | Read-write method and memory device |
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Also Published As
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| WO2018072420A1 (en) | 2018-04-26 |
| CN106569742B (en) | 2019-07-23 |
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