CN108415853A - A kind of method, apparatus and storage device of garbage reclamation - Google Patents
A kind of method, apparatus and storage device of garbage reclamation Download PDFInfo
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- CN108415853A CN108415853A CN201810215595.0A CN201810215595A CN108415853A CN 108415853 A CN108415853 A CN 108415853A CN 201810215595 A CN201810215595 A CN 201810215595A CN 108415853 A CN108415853 A CN 108415853A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0253—Garbage collection, i.e. reclamation of unreferenced memory
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
- G06F11/1048—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices using arrangements adapted for a specific error detection or correction feature
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/10—Providing a specific technical effect
- G06F2212/1041—Resource optimization
- G06F2212/1044—Space efficiency improvement
Abstract
The present invention relates to data processing fields, disclose a kind of method, apparatus and storage device of garbage reclamation.Wherein, the method for the garbage reclamation includes：Obtain the valid data for waiting for moving data block；Target data block is written into the valid data；The data of the target data block are verified, if the data of the target data block are not validated, target data block is written into the valid data again, until the data of the target data block pass through verification.In the above manner, the embodiment of the present invention can solve the problems, such as loss of data in garbage reclamation, ensure the accuracy rate of data garbage recycling.
Description
Technical field
The present invention relates to data processing fields, more particularly to the method, apparatus and storage device of a kind of garbage reclamation.
Background technology
Storage device includes USB flash disk (USB flash drive, USB flash disk), SSD (solid state disk, Solid State
Drive), (embedded type multi-core piece seals by eMMC (built-in multimedia storage card, Embedded Multi Media Card), eMCP
Dress, embedded Multi Chip Package), UFS (Common Flash Memory store, Universal Flash Storage), SD
Block equipment such as (safe digital storage card, Secure Digital Memory Card), is widely used in various products, example
Such as computer, mobile phone electronic product.It is more and more abundant with the function of electronic product, and volume is towards lightening, small-sized
Change development, this requires storage devices to remove hash in time, and more data are accommodated with vacating space.
However, when deleting file in an operating system, operating system only makes marks mark in file table inside it should
File has been deleted, and since flash memory device cannot cover available data, so on solid state disk, the data of current invalid are still protected
It stays on hard disk, therefore will produce a large amount of data garbage.In order to promote the utilization rate of solid state disk, need to carry out data garbage
Recovery processing.
The garbage collection procedure of data is mainly：The controller of solid state disk can first replicate all valid data, then
Valid data are written in another data field, and wipe all data cells in active data area, then write new data into wiping
Data field after removing.
Inventor has found during implementing the embodiment of the present invention in the garbage collection procedure of the prior art, due to compiling
Journey mistake or logic error can lead to loss of data.
Invention content
The embodiment of the present invention is mainly solving the technical problems that provide a kind of method, apparatus of garbage reclamation and storage is set
It is standby, it can solve the problems, such as loss of data in garbage reclamation, ensure the accuracy rate of data garbage recycling.
In order to solve the above technical problems, the embodiment of the present invention provides following technical scheme：
In a first aspect, an embodiment of the present invention provides a kind of method of garbage reclamation, it is applied to storage device data and handles,
Including：Obtain the valid data for waiting for moving data block；Target data block is written into the valid data；To the target data block
Data verified, if the data of the target data block are not validated, again by the valid data be written mesh
Data block is marked, until the data of the target data block pass through verification.
Optionally, the acquisition waits for the valid data of moving data block, including：The effective of moving data block is waited for described in acquisition
Data content, alternatively, waiting for the valid data physical address of moving data block described in obtaining.
Optionally, the method further includes：It is determined according to the perhaps described valid data physical address in the valid data
The target data block volume space and address.
Optionally, described that target data block is written into the valid data, including：Read in the valid data perhaps institute
State valid data physical address；The target data block is written into the perhaps described valid data physical address in the valid data
Address.
Optionally, the data to the target data block verify, including：Judge whether the valid data are complete
The target data block is written in portion, if the target data block is all written in the valid data, the target data block
Data are by verification, and otherwise the data of the target data block are not validated；Or judge the mistake inspection of the valid data
Whether the error number looked into and corrected is more than predetermined threshold value, if the error number of the error checking and correction is less than the default threshold
Value, then the data of the target data block are by verification, and otherwise the data of the target data block are not validated.
Optionally, the method further includes：The valid data are added and are marked；By the label and the valid data
The target data block is written together；Judge whether the target data block includes the label, if including, the number of targets
According to the data of block by verification, otherwise the data of the target data block are not validated.
Second aspect, an embodiment of the present invention provides a kind of devices of garbage reclamation, are applied to storage device, described device
Including：Acquisition module, for obtaining the valid data for waiting for moving data block；Writing module, for the valid data to be written
Target data block；Correction verification module is verified for the data to the target data block, if the number of the target data block
According to not validated, then target data block is written into the valid data again, until the data of the target data block pass through
Verification.
Optionally, the acquisition module includes：First acquisition unit, for obtaining the significant figure for waiting for moving data block
According to content, alternatively, second acquisition unit, for obtaining the valid data physical address for waiting for moving data block.
Optionally, described device further includes：Determining module, for according to the perhaps described valid data in the valid data
Physical address determines target data block volume space and address.
Optionally, said write module includes：Reading unit, for reading the perhaps described significant figure in the valid data
According to physical address；Writing unit, for the target to be written in the perhaps described valid data physical address in the valid data
Data block address.
Optionally, the correction verification module includes：First verification unit, for judging whether the valid data are all written
The target data block, if the target data block is all written in the valid data, the data of the target data block are logical
Verification is crossed, otherwise the data of the target data block are not validated；Or second verification unit, for judging the significant figure
According to error checking and correction error number whether be more than predetermined threshold value, if the error number of the error checking and correction is less than
The predetermined threshold value, then the data of the target data block are by verification, and otherwise the data of the target data block do not pass through school
It tests.
Optionally, described device further includes：Mark module is marked for being added to the valid data；Label write-in mould
Block, for the target data block to be written in the label and the valid data together；Marker for judgment module, for judging
State whether target data block includes the label, if including, the data of the target data block are by verification, the otherwise mesh
The data for marking data block are not validated.
The third aspect, an embodiment of the present invention provides a kind of storage device, the storage device includes：Controller；And
With the memory of controller communication connection；Wherein, the memory is stored with the instruction that can be executed by the controller, institute
It states instruction to be executed by the controller, so that the method that the controller is able to carry out garbage reclamation as described above.
Fourth aspect, an embodiment of the present invention provides a kind of electronic equipment, including above-mentioned storage device.
5th aspect, it is described non-volatile an embodiment of the present invention provides a kind of non-volatile computer readable storage medium storing program for executing
Property computer-readable recording medium storage has computer executable instructions, which is executed by electronic equipment
The method for stating garbage reclamation in any means embodiment.
6th aspect, an embodiment of the present invention provides a kind of computer program products, including are stored in non-volatile calculating
Calculation procedure on machine readable storage medium storing program for executing, the computer program include program instruction, when described program is instructed by computer
When execution, the method that makes the computer execute above-mentioned garbage reclamation.
The method of the garbage reclamation provided in the embodiment of the present invention waits for the valid data of moving data block by obtaining, will
Target data block is written in valid data, and then the data of target data block are verified, when the data of data block are not validated
When, target data block is written into valid data again, until the data of target data block pass through verification.This method is by adding school
Process is tested, can solve the problems, such as loss of data in garbage reclamation, ensures the accuracy rate of data garbage recycling, improves storage and set
The Information Security of garbage reclamation flow in standby firmware.
Description of the drawings
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element with same reference numbers label is expressed as similar element in attached drawing, removes
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of internal structure schematic diagram of storage device provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the garbage collection procedure of the storage device of Fig. 1；
Fig. 3 is a kind of flow diagram of the method for garbage reclamation provided in an embodiment of the present invention；
Fig. 4 is the valid data that a kind of acquisition of the method for garbage reclamation provided in an embodiment of the present invention waits for moving data block
Flow diagram；
Fig. 5 is that target data is written in the valid data by a kind of method of garbage reclamation provided in an embodiment of the present invention
The flow diagram of block；
Fig. 6 is a kind of flow diagram of the method for garbage reclamation that another embodiment of the present invention provides；
Fig. 7 is a kind of flow diagram of the application example of the method for garbage reclamation provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of the device of garbage reclamation provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of the device for garbage reclamation that another embodiment of the present invention provides；
Figure 10 is a kind of structural schematic diagram of storage device provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Currently, storage device is mainly made of storage medium and storage control two parts, as shown in FIG. 1, FIG. 1 is this hairs
A kind of internal structure schematic diagram for storage device that bright embodiment provides.
Storage operation is erasing unit, the medium inside equipment with physical block (block) for read-write cell with page (page)
It accesses and provides the parallel of multiple ranks such as channel, particle encapsulation, particle storage piece.It is deposited with much channel communication tissue inside equipment
Particle encapsulation is stored up, multiple particle encapsulation can be connected on each channel, share transmission channel between more particle encapsulation, but can independently hold
Row instruction.Internal each particle encapsulation includes two or more particles, and each particle can be executed instruction by independently choosing.In particle
Portion can be divided into multiple, and each piece contains the register cache there are one page size, for temporary read-write data.
Storage control is mainly responsible for address of cache, garbage reclamation and abrasion equilibrium.Storage passes through the newer mode in strange land
Alleviate the delay wiped before storage unit is write, since the erasing times of storage unit are limited, storage control passes through abrasion equilibrium
Algorithm comes the erasing times between balancing equipment internal physical block, while the object that garbage collection algorithms selective erasing as possible is efficient
Reason block recycling writes amplification to control.
It is understood that wherein, common garbage reclamation is roughly divided into following two：The first is label removing method,
By once marking all Useless objects, its committed memory space is directly recycled, this method efficiency is low, and will produce and do not connect
Continuous memory headroom；Second is replication strategy, and free memory is divided to equal equal portions, only uses portion therein every time,
When portion has been used up, triggering garbage collection operation copies in another region the valid data in the region, then removes the area
Domain, this method is efficient, avoids generating discontinuous memory headroom.The embodiment of the present invention in a second approach for illustrate
It is bright.
It is understood that the process of garbage reclamation is substantially：Flash controller first replicates all valid data, then
Valid data are written in another data field, and wipe all data cells in active data area, then write new data into wiping
Data field after removing.For example, as illustrated in fig. 2, it is assumed that flash memory device has two physical blocks of X and Y, each physical block to have 12 respectively
1. 4 units (A, B, C, D) are written to physical block X first in read-write cell；2. and then 4 units new to physical block X write-ins again
(E, F, G, H), while the updating the data of writing unit (A, B, C, D) (A ', B ', C ', D '), unit (A, B, C, D) becomes at this time
Fail data；3. in order to continue that new data are written to the position of unit (A, B, C, D), need by (E, F, G, H, A ', B ', C ',
D ') this 8 units first move in physical block Y, then physical block X removed, here it is the processes of garbage reclamation.But due to
In garbage collection procedure, the write operation for carrying out data is needed, these operations may be due to misprogrammed or logic error, meeting
Lead to loss of data.
Based on this, referring to Fig. 3, Fig. 3 is a kind of flow signal of method of garbage reclamation provided in an embodiment of the present invention
Figure.The method of the garbage reclamation applied to storage device data processing, wherein storage device can be specially USB flash disk, SSD,
The equipment such as eMMC, eMCP, UFS and SD card, storage device can be specifically made of storage control and storage medium, storage control
Function can specifically realize that the function of storage medium can be realized specifically by storage chip, storage chip flash by control chip
The chip of chip, flash types can be specially NAND flash chips etc..As described in Figure 3, this method includes：
110, the valid data for waiting for moving data block are obtained.
Above-mentioned " waiting for moving data block " is the physical block for waiting for garbage reclamation, wherein physical block is storage medium
The physical region for storing data, is storage cell of the data on disk, the minimum used when being operation file in upper layer software (applications)
Operating unit.Physical block is made of sector, and a physical block is read from hardware device, really reads one from hardware device
Or multiple sectors.Physical block counterlogic block, logical block are corresponding with file.
Above-mentioned " valid data " are to be stored in the data for waiting for waiting for moving in moving data block, can be update number
According to for example, waiting for moving data block elder generation writing unit A, then writing unit A updates the data A ', then unit A ' is significant figure
According to.Wherein, valid data can be to wait for moving data one or several read-write cells in the block.
In the present embodiment, the valid data for waiting for moving data block are obtained, specific implementation mode is：Acquisition waits for moving data
Block, then from waiting for identifying valid data in moving data block, to obtain the valid data for waiting for moving data block.For example, it is assumed that
There are two physical blocks of X and Y, X has read-write cell (A, B, C, D) and its to update the data unit (A ', B ', C ', D '), need to be carried out to X
Garbage reclamation then first obtains physical block X, and valid data unit (A ', B ', C ', D ') is then identified from X, is waited for obtain
The valid data of moving data block are (A ', B ', C ', D ').
Wherein, as shown in figure 4, obtaining the valid data for waiting for moving data block, including：
111, the valid data content for waiting for moving data block is obtained, alternatively,
112, the valid data physical address for waiting for moving data block is obtained.
In the present embodiment, wait for that the valid data of moving data block correspond to corresponding content and physical address.Wherein, effectively
Data content is the data information of valid data, and valid data physical address is the address information of valid data, for example, it is assumed that waiting for
The address location 0000,0001,0010,0011 of moving data block is respectively written into data 1011,1100,1101,1110, then effectively
Data content is 1011,1100,1101,1110, and valid data physical address is 0000,0001,0010,0011.
Wherein, as shown in figure 4, this method further includes：
113, the target data block capacity is determined according to the perhaps described valid data physical address in the valid data
Space and address.
Above-mentioned " target data block volume space " is the residual capacity size of target data block, according to target data block capacity
Spatial choice residual capacity is more than the target data block of the length of valid data content.Above-mentioned " target data block address " is target
The place physical address of data block needs to wait for moving data block X for example, the physical address of physical block X, Y are respectively 00,01
Data move target data block Y to, then to X carry out garbage reclamation, then target data block address be Y physical address 01.
In the present embodiment, after obtaining target data block volume space according to valid data, target data block is determined according to volume space, so
The address of the target data block is obtained afterwards.
In the present embodiment, the valid data content for waiting for moving data block is obtained, it can be by identifying valid data content
Length determine the volume space of target data block, and the enough number of targets of capacity are obtained according to the volume space of target data block
According to the address of block, to which target data block is written in valid data.The valid data physical address for waiting for moving data block is obtained, it can
To determine the length of valid data content according to valid data physical address, so that it is determined that the volume space of target data block, so
The address for obtaining the enough target data blocks of capacity according to the volume space of target data block afterwards, to which mesh is written in valid data
Mark data block.
120, target data block is written into the valid data.
Above-mentioned " target data block " physical block of data to be subjected write-in such as is, wherein target data block can be arbitrary
The remaining space of free physical block, target data block can be more than or equal to the occupied space of valid data.For example, have X,
Y, tri- physical blocks of Z, it is assumed that X is to wait for moving data block, and for valid data there are three unit A, B, C, the residue that identification obtains Y is empty
Between be 2 units, the remaining space of Z is 4 units, then selects Z for target data block.
In the present embodiment, it obtains after the valid data of moving data block, target data then is written into valid data
Block is purged to treat moving data block, to realize garbage reclamation.
Wherein, as shown in figure 5, target data block is written in the valid data, including：
121, the perhaps described valid data physical address in the valid data is read；
122, the target data block address is written into the perhaps described valid data physical address in the valid data.
In the present embodiment, perhaps valid data physical address determines that target data block capacity is empty according to valid data
Between and address after, from waiting for reading valid data content or valid data physical address in moving data block, then according to determination
Target data block address, target data block address is written into valid data content or valid data physical address.
Wherein, from reading valid data content in moving data block is waited for, target data block is written by valid data content
Location, such as：The address of physical block X, Y are respectively 00,01, it is assumed that wait for moving data block as X, target data block Y, reading obtains
The valid data content of X is 1011,1100,1101,1110, then by 1011,1100,1101,1110 write-in target data blocks
Location 01.
Wherein, from reading valid data physical address in moving data block is waited for, target is written into valid data physical address
Data block address, such as：The address of physical block X, Y are respectively 00,01, it is assumed that wait for moving data block be X, target data block Y,
Read obtain X valid data physical address be 0000,0001,0010,0011, respectively corresponding data 1011,1100,1101,
1110, the content for being 0000,0001,0010,0011 by valid data physical address, i.e. data 1011,1100,1101,1110
Target data block address 01 is written.
It should be noted that the target data is written in the perhaps described valid data physical address in the valid data
It when block address, can be written, can also be written since the last address of valid data since the first address of valid data, it can be with
It is sequentially written in, it can also inverted order write-in.
130, the data of the target data block are verified, if the data of the target data block do not pass through school
It tests, then target data block is written into the valid data again, until the data of the target data block pass through verification.
In the storage and transmission of data, it some times happens that random write error.Due to the physical characteristic of storage medium,
In data storing procedure, due to the influence of external environment, low volume data may be caused to change in storing process.Cause
This, needs the data to target data block is written to verify, ensures data correctness when garbage reclamation.
After target data block is written in valid data, the data of target data block are verified, to examine write-in mesh
Whether the data of mark data block are correctly written in.If the data of target data block show that target is written in valid data by examining
Data block has been correctly written in, then garbage collection procedure is completed.If the data of target data block are not verified, show valid data
Write-in there is mistake, then target data block is written into valid data again, then verify to the data of target data block, directly
Data to target data block pass through verification.
Wherein, the data of target data block are not verified, show that mistake occurs in the write-in of valid data, then will have again
It imitates data and target data block is written, then the data of target data block are verified, if the data of target data block are verified
It is still not validated, then it recycles and target data block is written into valid data again, the data of target data block are verified, directly
Data to target data block pass through verification.
Wherein, it when target data block is written in valid data again, if former target data block volume space is insufficient, weighs
It is new to read valid data, and target data block is redefined, valid data are written in new target data block.For example, it is assumed that
Wait for that moving data block is X, former target data block is Y, and target is written in the valid data content 1011,1100,1101,1110 of X
In data block Y, the data of Y are verified, verification do not pass through, and the remaining space of Y be less than valid data content 1011,
1100,1101,1110 the space occupied, then redefine target data block Z, and again from X read valid data content 1011,
1100,1101,1110, target data block Z is written into valid data content 1011,1100,1101,1110.
Wherein, the data of the target data block are verified, including：
131, judge whether the valid data are all written the target data block, if the valid data are all written
The target data block, then the data of the target data block are by verification, and otherwise the data of the target data block do not pass through
Verification；Alternatively,
132, judge whether the error number of error checking and the correction of the valid data is more than predetermined threshold value, if the mistake
The error number that flase drop is looked into and corrected is less than predetermined threshold value, then the data of the target data block pass through verification, the otherwise mesh
The data for marking data block are not validated.
Wherein, judge whether valid data are all written target data block, the unit number of acquisition valid data can be passed through
Have if the unit number of valid data is equal with the write-in unit number of target data block with the unit number of write-in target data block
Data all write-in target data blocks are imitated, otherwise target data block is not written all in valid data, such as：There are four valid data
Unit (A, B, C, D), if the unit number of write-in target data block is 4, target data block is all written in valid data, if writing
The unit number for entering target data block is 3, then target data block is not written all in valid data.It can also be by obtaining significant figure
According to the length of content and the luv space of target data block and remaining space, the occupancy for calculating the data of write-in target data block is empty
Between, if the length of valid data content is equal to the occupied space of the data of write-in target data block, valid data are all written
Target data block, otherwise valid data target data block is not written all.
Wherein, error checking and correction (Error Correcting Cod, ECC), " error checking can be realized by being one kind
And correct " technology, be widely used in the computer instruction in various fields, by the error correction of memory, the operation of computer
Instruction can just continue to execute, and system is just to more they tend to safety and stability in work.Error checking and entangling is exactly based on coding and realizes
, according to Shannon's theorems, increase redundancy for the data of storage, by redundancy check to realize error checking and correction.Mistake
The error number for checking and correcting is by error checking and to correct the error number obtained, and predetermined threshold value is pre-set error number
Value, for judging whether the data of target data block pass through verification, wherein predetermined threshold value can be 100bit, if error checking
Error number with correction is more than 100bit, then the data of target data block are not validated.
A kind of method of garbage reclamation provided in an embodiment of the present invention, this method wait for the effective of moving data block by obtaining
Target data block is written in valid data by data, and then the data of target data block are verified, when the data of data block are not led to
When crossing verification, target data block is written into valid data again, until the data of target data block pass through verification.This method passes through
Checking procedure is added, can solve the problems, such as loss of data in garbage reclamation, ensures the accuracy rate of data garbage recycling, improves
The Information Security of garbage reclamation flow in storage device firmware.
Referring to Fig. 6, Fig. 6 is a kind of flow diagram of the method for garbage reclamation that another embodiment of the present invention provides.
As shown in fig. 6, this method includes：
210, the valid data for waiting for moving data block are obtained, and the valid data are added and are marked；
220, target data block is written into the valid data, and institute is written into the label and the valid data together
State target data block；
230, the data of the target data block are verified, judges whether the target data block includes the mark
Note, if including, the data of the target data block are by verification, and otherwise the data of the target data block are not validated,
If the data of the target data block are not validated, target data block is written into the valid data again, until institute
The data for stating target data block pass through verification.
The main distinction of the present embodiment and above-described embodiment is that this method further includes：The valid data are added and are marked
Note；The target data block is written into the label and the valid data together；Judge the target data block whether include
The label, if including, the data of the target data block are by verification, and otherwise the data of the target data block do not pass through
Verification.Wherein, valid data are added and is marked, can entire valid data be added with label or part valid data are added
Label；Judge whether target data block whether comprising label, there can be label by detection target data block, if there is label,
Target data block includes label；Can also by judge target data block mark whether it is identical as the label of valid data, if
Identical, then target data block includes label.It is marked by being added to valid data, the accuracy that can be moved with verification data.
A kind of method of garbage reclamation provided in an embodiment of the present invention, this method wait for the effective of moving data block by obtaining
Data, and valid data are added and are marked, target data block is written into valid data and label together, judges that target data block is
No includes the label, if including, the data of target data block are by verification, and otherwise the data of target data block do not pass through school
It tests, if not validated, target data block is written into valid data again, until the data of target data block pass through school
It tests.This method is added valid data and is marked by checking procedure, and asking for loss of data in garbage reclamation can be solved
Topic ensures the accuracy rate of data garbage recycling, improves the Information Security of garbage reclamation flow in storage device firmware.
Show referring to Fig. 7, Fig. 7 is a kind of flow of the application example of the method for garbage reclamation provided in an embodiment of the present invention
It is intended to.Since garbage reclamation is a very important process in storage device, the valid data having been written into predominantly are moved,
Free physical space is vacateed to write new data, wherein during moving, need to do write operation etc., these operations have
Wrong risk.Based on this, the embodiment of the present invention is added to checking process during garbage reclamation, to ensure garbage reclamation number
According to accuracy rate.As shown in fig. 7, this method includes：
S1, garbage reclamation information is determined：Acquisition waits for moving data block, and waits for the valid data of moving data block, and root
Target data block volume space and address are determined according to valid data；
Wherein, it includes valid data content and valid data physical address to obtain valid data；
S2, data-moving：Target data block is written into valid data；
Wherein, include by valid data write-in target data block：Perhaps valid data physical address in valid data is read,
Then by perhaps target data block address is written in valid data physical address in valid data；
S3, data check：The data for reading target data block, verify the data of target data block, and judge mesh
The data of data block are marked whether by verification, verification standard is：Judge whether valid data are all written target data block, or
Judge whether the error number of error checking and the correction of valid data is more than predetermined threshold value；
Wherein, judge whether valid data are all written target data block：If target data block is all written in valid data,
Then the data of target data block are by verification, and otherwise the data of target data block are not validated；Wherein, judge valid data
Whether the error number of error checking and correction is more than predetermined threshold value：If the error number of error checking and correction is less than default threshold
Value, then the data of target data block are by verification, and otherwise the data of target data block are not validated；
Wherein, if the data of target data block are not validated, target data block is written into valid data again, directly
Data to target data block pass through verification.
In embodiments of the present invention, in order to further ensure the verification accuracy of data, moving data block can will be being waited for
When middle valid data write-in target data block, specific markers are added to the valid data, and by specific markers and valid data one
Write-in target data block is played, when carrying out data check, reads target data data in the block, and whether judge the specific markers
Accurately；By adding specific markers to the valid data, the accuracy of verification data migration may further ensure that.
A kind of method of garbage reclamation of the embodiment of the present invention, this method is by determining garbage reclamation information, data-moving
And data check, it can solve the problems, such as loss of data in garbage reclamation, ensure the accuracy rate of data garbage recycling, improve and deposit
Store up the Information Security of garbage reclamation flow in equipment firmware.
Referring to Fig. 8, Fig. 8 is a kind of structural schematic diagram of the device of garbage reclamation provided in an embodiment of the present invention.Such as Fig. 8
Shown, which includes acquisition module 31, writing module 32 and correction verification module 33.
Wherein, acquisition module 31 is for obtaining the valid data for waiting for moving data block；Writing module 32 by described for having
It imitates data and target data block is written；Correction verification module 33 is for verifying the data of the target data block, if the mesh
The data for marking data block are not validated, then target data block are written in the valid data again, until the target data
The data of block pass through verification.
In the present embodiment, acquisition module 31 is connect with writing module 32, and writing module 32 is connect with inspection module 33, is obtained
Modulus block 31 waits for that the valid data of moving data block are sent to writing module 32 by acquisition, and writing module 32 writes valid data
Enter target data block, the data that target data block is written in inspection module 33 verify, if the data of target data block are not led to
Verification is crossed, then returns to writing module 32 and target data block is written into valid data again, until the data of target data block pass through
Verification, to ensure the accuracy rate of data garbage recycling.
Wherein, acquisition module 31 includes first acquisition unit 311 or second acquisition unit 312.Wherein first obtains list
Member 311 waits for moving data block for obtaining the valid data content for waiting for moving data block, second acquisition unit 312 for obtaining
Valid data physical address.
Wherein, which further includes determining module 313.Determining module 313 be used for according in the valid data perhaps
Valid data physical address determines target data block volume space and address.
Wherein, writing module 32 includes reading unit 321 and writing unit 322.Wherein, reading unit 321 is for reading
The perhaps described valid data physical address in the valid data；Writing unit 322 is used for perhaps institute in the valid data
It states valid data physical address and the target data block address is written.
Wherein, correction verification module 33 includes the first verification unit 331 or the second verification unit 332.First verification unit 331
For judging whether the valid data are all written the target data block, if the target is all written in the valid data
Data block, then the data of the target data block are by verification, and otherwise the data of the target data block are not validated；Second
Verification unit 332 is used to judge whether the error number of error checking and the correction of the valid data to be more than predetermined threshold value, if institute
The error number for stating error checking and correction is less than predetermined threshold value, then the data of the target data block pass through verification, otherwise institute
The data for stating target data block are not validated.
In some embodiments, referring to Fig. 9, the main distinction of Fig. 9 and Fig. 8 is, which further includes label mould
Block 341, label writing module 342 and marker for judgment module 343.Mark module 341 is marked for being added to the valid data
Note；Writing module 342 is marked, for the target data block to be written in the label and the valid data together；Label is sentenced
Disconnected module 343, for judging whether the target data block includes the label, if including, the number of the target data block
According to by verification, otherwise the data of the target data block are not validated.
It should be noted that the information between modules in the device of garbage reclamation in the embodiment of the present invention is handed over
Mutually, the contents such as implementation procedure, due to being based on same design with the method for the present invention embodiment, particular content is equally applicable to rubbish and returns
The device of receipts.Modules in the embodiment of the present invention can realize as individual hardware or software, and can be according to need
The combination of the function of each unit is realized using individual hardware or software.
A kind of device of garbage reclamation provided in an embodiment of the present invention, the device obtain number to be moved by acquisition module 31
According to the valid data of block, target data block is written in valid data by writing module 32, and target data block is written in inspection module 33
Data verified, if the data of target data block are not validated, return to writing module 32 and again write valid data
Enter target data block, until the data of target data block pass through verification.The device can solve rubbish by adding correction verification module
In recycling the problem of loss of data, ensures the accuracy rate of data garbage recycling, improve garbage reclamation stream in storage device firmware
The Information Security of journey.
Referring to Fig. 10, Figure 10 is a kind of structural schematic diagram of storage device provided in an embodiment of the present invention.Such as Figure 10 institutes
Show, which includes：Controller 41 and memory 42, are electrically connected between controller 41 and memory 42.
Memory 42 is used as a kind of non-volatile computer readable storage medium storing program for executing, can be used for storing non-volatile software journey
Sequence, non-volatile computer executable program and module, such as the corresponding journey of the method for the garbage reclamation in the embodiment of the present invention
Sequence instruction/module (for example, attached acquisition module shown in Fig. 8 31, writing module 32 and correction verification module 33).Controller 41 passes through fortune
Row is stored in non-volatile software program, instruction and module in memory 42, is answered to the various functions of execute server
With and data processing, that is, realize above method embodiment garbage reclamation method.
Memory 42 may include storing program area and storage data field, wherein storing program area can storage program area,
At least one required application program of function；Storage data field can be stored to be created according to using for the device of garbage reclamation
Data etc..
One or more of modules are stored in the memory 42, when by one or more of controllers 41
When execution, the method for executing garbage reclamation in above-mentioned any means embodiment, for example, executing the method in Fig. 3 described above
Step 110 is to step 130, method and step 111 in Fig. 4 to step 113, the method and step 121 in Fig. 5 to step 122, Fig. 6
In module 33-35, Fig. 6 in method and step 210 to step 230, the function etc. of the module 31-33 in Fig. 8.
The said goods can perform the method that the embodiment of the present invention is provided, and has the corresponding function module of execution method and has
Beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to the method that the embodiment of the present invention is provided.
An embodiment of the present invention provides the storage devices in a kind of electronic equipment, including above-described embodiment.Wherein, the electronics
Equipment, which can be smart mobile phone, computer, smartwatch, Intelligent bracelet, tablet computer, palm PC etc., has store function
Electronic equipment.
An embodiment of the present invention provides a kind of non-volatile computer readable storage medium storing program for executing, and the non-volatile computer can
It reads storage medium and is stored with computer executable instructions, which executes above-mentioned any means by electronic equipment
The method of garbage reclamation in embodiment, for example, executing method and step 110 in Fig. 3 described above to step 130, in Fig. 4
Method and step 111 is to step 113, method and step 121 in Fig. 5 to step 122, the method in module 33-35, Fig. 6 in Fig. 6
Step 210 is to step 230, the function etc. of the module 31-33 in Fig. 8.
An embodiment of the present invention provides a kind of computer program products, including are stored in non-volatile computer readable storage
Calculation procedure on medium, the computer program include program instruction, when described program instruction is computer-executed, make institute
The method that computer executes garbage reclamation in above-mentioned any means embodiment is stated, for example, executing the method in Fig. 3 described above
Step 110 is to step 130, method and step 111 in Fig. 4 to step 113, the method and step 121 in Fig. 5 to step 122, Fig. 6
In module 33-35, Fig. 6 in method and step 210 to step 230, the function etc. of the module 31-33 in Fig. 8.
The apparatus embodiments described above are merely exemplary, wherein the unit illustrated as separating component can
It is physically separated with being or may not be, the component shown as unit may or may not be physics list
Member, you can be located at a place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of module achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those of ordinary skill in the art can be understood that each embodiment
The mode of general hardware platform can be added to realize by software, naturally it is also possible to pass through hardware.Those of ordinary skill in the art can
With understand all or part of flow realized in above-described embodiment method be can be instructed by computer program it is relevant hard
Part is completed, and the program can be stored in a computer read/write memory medium, the program is when being executed, it may include as above
State the flow of the embodiment of each method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-
Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this
It under the thinking of invention, can also be combined between the technical characteristic in above example or different embodiment, step can be with
It is realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity, they do not have
Have and is provided in details；Although the present invention is described in detail referring to the foregoing embodiments, the ordinary skill people of this field
Member should understand that：It still can be with technical scheme described in the above embodiments is modified, or to which part skill
Art feature carries out equivalent replacement；And these modifications or replacements, each reality of the present invention that it does not separate the essence of the corresponding technical solution
Apply the range of a technical solution.
Claims (13)
1. a kind of method of garbage reclamation is applied to storage device data and handles, which is characterized in that including：
Obtain the valid data for waiting for moving data block；
Target data block is written into the valid data；
The data of the target data block are verified, if the data of the target data block are not validated, again
Target data block is written into the valid data, until the data of the target data block pass through verification.
2. according to the method described in claim 1, it is characterized in that, described obtain waits for the valid data of moving data block, including：
The valid data content of moving data block is waited for described in acquisition, alternatively,
The valid data physical address of moving data block is waited for described in acquisition.
3. according to the method described in claim 2, it is characterized in that, the method further includes：
The target data block volume space and ground are determined according to the perhaps described valid data physical address in the valid data
Location.
4. according to the method described in claim 3, it is characterized in that, described be written target data block, packet by the valid data
It includes：
Read the perhaps described valid data physical address in the valid data；
The target data block address is written into the perhaps described valid data physical address in the valid data.
5. according to claim 1-4 any one of them methods, which is characterized in that the data to the target data block into
Row verification, including：
Judge whether the valid data are all written the target data block, if the target is all written in the valid data
Data block, then the data of the target data block are by verification, and otherwise the data of the target data block are not validated；Or
Judge error checking and the correction of the valid data error number whether be more than predetermined threshold value, if the error checking and
The error number of correction is less than the predetermined threshold value, then the data of the target data block pass through verification, the otherwise number of targets
It is not validated according to the data of block.
6. according to the method described in claim 5, it is characterized in that, the method further includes：
The valid data are added and are marked；
The target data block is written into the label and the valid data together；
Judge whether the target data block includes the label, if including, the data of the target data block by verification,
Otherwise the data of the target data block are not validated.
7. a kind of device of garbage reclamation is applied to storage device, which is characterized in that including：
Acquisition module, for obtaining the valid data for waiting for moving data block；
Writing module, for target data block to be written in the valid data；
Correction verification module is verified for the data to the target data block, if the data of the target data block are not led to
Verification is crossed, then target data block is written into the valid data again, until the data of the target data block pass through verification.
8. device according to claim 7, which is characterized in that the acquisition module includes：
First acquisition unit waits for the valid data content of moving data block for the acquisition, alternatively,
Second acquisition unit waits for the valid data physical address of moving data block for the acquisition.
9. device according to claim 8, which is characterized in that described device further includes：
Determining module, for determining target data block capacity according to the perhaps described valid data physical address in the valid data
Space and address.
10. device according to claim 9, which is characterized in that said write module includes：
Reading unit, for reading the perhaps described valid data physical address in the valid data；
Writing unit is used for the perhaps described valid data physical address in the valid data target data block is written
Location.
11. according to claim 7-10 any one of them devices, which is characterized in that the correction verification module includes：
First verification unit, for judging whether the valid data are all written the target data block, if the significant figure
According to the target data blocks are all written, then the data of the target data block are by verification, otherwise the target data block
Data are not validated；Or
Whether the error number of the second verification unit, error checking and correction for judging the valid data is more than default threshold
Value, if the error number of the error checking and correction is less than the predetermined threshold value, the data of the target data block pass through
Verification, otherwise the data of the target data block are not validated.
12. according to the devices described in claim 11, which is characterized in that described device further includes：
Mark module is marked for being added to the valid data；
Writing module is marked, for the target data block to be written in the label and the valid data together；
Marker for judgment module, for judging whether the target data block includes the label, if including, the target data
The data of block are by verification, and otherwise the data of the target data block are not validated.
13. a kind of storage device, which is characterized in that including：Controller；And the memory with controller communication connection；
Wherein, the memory is stored with the instruction that can be executed by the controller, and described instruction is executed by the controller, so that institute
It states controller and is able to carry out claim 1 to 6 any one of them method.
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| CN201810215595.0A CN108415853A (en) | 2018-03-15 | 2018-03-15 | A kind of method, apparatus and storage device of garbage reclamation |
| PCT/CN2018/105305 WO2019174205A1 (en) | 2018-03-15 | 2018-09-12 | Trash recovery method and device and storage equipment |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201810215595.0A CN108415853A (en) | 2018-03-15 | 2018-03-15 | A kind of method, apparatus and storage device of garbage reclamation |
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