CN106294026A - Mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof - Google Patents
Mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof Download PDFInfo
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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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
Abstract
The invention discloses the mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof, in snapshot fragment page is divided into odd number snapshot fragment page and even number snapshot fragment page the odd chanel being stored respectively in flash memory and even-numbered channels according to the page number parity of the logical page (LPAGE) amendment data of storage；When solid-state disk carries out power loss recovery, the map information stored when reading powered-off fault in flash memory and flash memory be the mapping table of last storage before powered-off fault；Positional information that map information includes the mapping table stored for the last time and the mapping table stored the last time start to write with a brush dipped in Chinese ink the start-stop address to the snapshot fragment page being stored in flash memory after the moment of flash memory；N number of CPU reads respectively according to start-stop address and according to odd number snapshot fragment page and even number snapshot fragment page, the mapping table of last storage is updated operation, and N is even number.The present invention can strengthen parallel processing degree during power loss recovery, and then shortens the time of power loss recovery.
Description
Technical field
The present invention relates to snapping technique field, particularly relate to the mapping table restoration methods after a kind of solid-state disk powered-off fault
And system.
Background technology
Along with the progress of nand flash memory technique, solid-state disk (including multiple flash chip in solid-state disk) capacity is increasing,
The metadata of solid-state disk, especially mapping table are the most increasing, for avoiding causing mapping table to lose due to solid-state disk powered-off fault
Removing many significant datas, current commonly used increase electric capacity extends power down time, uses snapping technique will to have change simultaneously
The method that the snapshot fragment of map information is saved on flash memory.
Wherein, snapping technique refers to the map information of logical page (LPAGE) to Physical Page is done snapshot.The normal work of solid-state disk
Flow process is: after internal memory receives the map information of renewal, generates snapshot fragment according to this map information and is stored in snapshot fragment
In page (Physical Page), and update the mapping table content in internal memory；When snapshot fragment page capacity is full, by this snapshot fragment page brush
In write flash memory, after the quantity of the snapshot fragment page in writing with a brush dipped in Chinese ink flash memory reaches predetermined threshold value, by the mapping table brush in internal memory
In write flash memory.
But, at present when mapping table is carried out power loss recovery, often due to data to be restored more and cause recover
The problem appearance that time is longer, reliability is relatively low.
Therefore, how to provide the mapping table restoration methods after short solid-state disk powered-off fault of a kind of power loss recovery time and
System is the problem that those skilled in the art are presently required solution.
Summary of the invention
It is an object of the invention to provide the mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof, it is possible to increase
Parallel processing degree during strong power loss recovery, and then shorten the time of power loss recovery, improve the reliability of solid-state disk.
For solving above-mentioned technical problem, the invention provides the mapping table restoration methods after a kind of solid-state disk powered-off fault,
The odd chanel for storing odd number snapshot fragment page is included and for storing even number snap shot in the flash memory of described solid-state disk
The even-numbered channels of section page, described odd number snapshot fragment page internal memory has odd to revise data, described even number snapshot fragment page
Inside there are even pages amendment data；Described method includes:
When described solid-state disk carries out power loss recovery, in described flash memory read powered-off fault time storage map information with
And the described flash memory mapping table of last storage before powered-off fault；Wherein, described map information include described last
The positional information of the mapping table of secondary storage and start to write with a brush dipped in Chinese ink to during described flash memory at the mapping table of described last storage
The start-stop address of the snapshot fragment page of described flash memory it is stored in after quarter；
N number of CPU reads odd number snapshot fragment page and even number snapshot fragment page respectively according to described start-stop address；And according to
Read the odd number snapshot fragment page obtained and the mapping table of described last storage is updated by even number snapshot fragment page
Operation, N is even number.
Preferably, described according to reading the described odd number snapshot fragment page and described even number snapshot fragment page obtained to institute
State the mapping table of last storage be updated operation process particularly as follows:
The snapshot fragment page in respective channel is read by evening to order early according to the time being stored in described flash memory；
Judge that in the current snapshot fragment page read, corresponding logical page data is carried out in this renewal process the most
Cross amendment, if so, ignore the amendment this time to described logical page data, if it is not, according to the snapshot fragment page of described current reading
Described logical page data is modified.
Preferably, described odd number snapshot fragment page is stored in described odd chanel and described even number snapshot fragment page is stored in institute
State the process of even-numbered channels particularly as follows:
After receiving logical page (LPAGE) amendment data, if the page number of described logical page (LPAGE) amendment data is odd number, by described logical page (LPAGE)
Amendment data revise data as odd, and generate corresponding odd number snapshot fragment；If described logical page (LPAGE) amendment data
The page number be even number, described logical page (LPAGE) amendment data are revised data as even pages, and generate corresponding even number snapshot
Fragment；
The described odd number snapshot fragment generated or described even number snapshot fragment are stored respectively to corresponding Physical Page；
After the Physical Page storing described odd number snapshot fragment is filled with, using described Physical Page as odd number snapshot fragment
In the odd chanel that page is write with a brush dipped in Chinese ink to described flash memory；
After the Physical Page storing described even number snapshot fragment is filled with, using described Physical Page as even number snapshot fragment
In the even-numbered channels that page is write with a brush dipped in Chinese ink to described flash memory；
When there is powered-off fault in described solid-state disk, by currently not yet write with a brush dipped in Chinese ink to described flash memory odd number snapshot fragment page with
And even number snapshot fragment page writes with a brush dipped in Chinese ink respectively to corresponding odd chanel and even-numbered channels.
Preferably, described in described flash memory read powered-off fault time storage map information process particularly as follows:
Metadata information is read in described flash memory；
Described map information during the powered-off fault recorded in obtaining described metadata information.
Preferably, described odd chanel and described even-numbered channels are 2.
Preferably, N is 2, and a described CPU reads odd number snapshot fragment page according to described start-stop address, and according to reading
The odd number snapshot fragment page obtained is updated operation to the mapping table of described last storage；Another described CPU according to
Even number snapshot fragment page is read in described start-stop address, and deposits for the last time described according to reading the even number snapshot fragment page obtained
The mapping table of storage is updated operation.
For solving above-mentioned technical problem, present invention also offers the mapping table restorer after a kind of solid-state disk powered-off fault
System, includes the odd chanel for storing odd number snapshot fragment page and for storing even number snapshot in the flash memory of described solid-state disk
The even-numbered channels of fragment page, described odd number snapshot fragment page internal memory has odd to revise data, described even number snapshot fragment
Even pages amendment data are had in Ye；Described system includes:
Read module, for when described solid-state disk carries out power loss recovery, deposits when reading powered-off fault in described flash memory
The map information of storage and described flash memory be the mapping table of last storage before powered-off fault；Wherein, described map information
Including the positional information of mapping table of described last storage and start to write with a brush dipped in Chinese ink at the mapping table of described last storage
The start-stop address of the snapshot fragment page of described flash memory it is stored in after the moment of described flash memory；
N number of CPU, for reading odd number snapshot fragment page and even number snapshot fragment page respectively according to described start-stop address；
And according to reading the odd number snapshot fragment page that obtains and the mapping table of described last storage is entered by even number snapshot fragment page
Row updates operation, and N is even number.
The invention provides the mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof, by snapshot fragment page
It is divided into odd number snapshot fragment page and even number snapshot fragment page, respectively storage odd amendment data and even pages
Amendment data；And the odd chanel that is stored respectively in flash memory of odd number snapshot fragment page and even number snapshot fragment page and even number
In passage；When solid-state disk carries out power loss recovery, multiple CPU can be used to read odd number snapshot fragment page and even number respectively
Mapping table is also updated by snapshot fragment page.Visible, when the present invention enhances power loss recovery by the way of odd even separates
Parallel processing degree, and then shorten the time of power loss recovery, improve the reliability of solid-state disk.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings
Obtain other accompanying drawing.
The flow chart of the process of the mapping table restoration methods after a kind of solid-state disk powered-off fault that Fig. 1 provides for the present invention；
The structural representation of the mapping table recovery system after a kind of solid-state disk powered-off fault that Fig. 2 provides for the present invention.
Detailed description of the invention
The core of the present invention is to provide the mapping table restoration methods after a kind of solid-state disk powered-off fault and system thereof, it is possible to increase
Parallel processing degree during strong power loss recovery, and then shorten the time of power loss recovery, improve the reliability of solid-state disk.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
The invention provides the mapping table restoration methods after a kind of solid-state disk powered-off fault, include in the flash memory of solid-state disk using
In the odd chanel of storage odd number snapshot fragment page and for storing the even-numbered channels of even number snapshot fragment page, odd number snap shot
Section page internal memory has odd to revise data, has even pages amendment data in even number snapshot fragment page；See Fig. 1 institute
Show, the flow chart of the process of the mapping table restoration methods after a kind of solid-state disk powered-off fault that Fig. 1 provides for the present invention；The method
Including:
Step s101: when solid-state disk carries out power loss recovery, the map information of storage when reading powered-off fault in flash memory
And flash memory mapping table of last storage before powered-off fault；Wherein, map information includes that store for the last time reflects
The positional information of firing table and the mapping table stored the last time start to write with a brush dipped in Chinese ink and are stored in the fast of flash memory after the moment of flash memory
The start-stop address of photo section page；
Step s102:N CPU reads odd number snapshot fragment page and even number snapshot fragment page respectively according to start-stop address；
And according to reading the odd number snapshot fragment page obtained and even number snapshot fragment page, the mapping table of last storage is carried out more
New operation, N is even number.
It should be noted that even number CPU reads the snapshot fragment page in odd chanel and even-numbered channels respectively.
It is understood that in snapping technique, the quantity of the snapshot fragment page in writing with a brush dipped in Chinese ink flash memory reaches to preset threshold
After value, the mapping table in internal memory can be write with a brush dipped in Chinese ink in flash memory, and if powered-off fault situation now occurs, the biggest may now write with a brush dipped in Chinese ink
Enter the snapshot fragment number of pages in flash memory to be not up to predetermined threshold value and (the most often write with a brush dipped in Chinese ink page 20 and deposit a mapping table, but abnormal power-down
Shi Keneng has only deposited page 10 snapshot fragment pages), in this case, flash memory storage is last mapping table, and with this 10
The mapping table that page snapshot fragment page internal information is corresponding is not yet stored in flash memory but is still located in internal memory, then loses after power down, needs
According to these page 10 snapshot fragment pages, mapping table is updated after the power-up.Therefore for avoiding useless operation, when powered-off fault
Need to record the start-stop address of the snapshot fragment page that this partial amt is not up to predetermined threshold value, according to this start-stop address during for recovering
Find out this part snapshot fragment page.
As preferably, according to reading the odd number snapshot fragment page and even number snapshot fragment page obtained to depositing for the last time
Storage mapping table be updated operation process particularly as follows:
The snapshot fragment page in respective channel is read by evening to order early according to the time being stored in flash memory；
Judge that in the current snapshot fragment page read, corresponding logical page data is carried out in this renewal process the most
Cross amendment, if so, ignore the amendment this time to logical page data, if it is not, according to the current snapshot fragment page read to logical page (LPAGE)
Data are modified.
It is understood that employing aforesaid operations, unnecessary amendment write operation can be reduced as far as possible, shorten after powering on
The recovery time of mapping table, improve the reliability of solid-state disk.
Concrete, odd number snapshot fragment page is stored in odd chanel and even number snapshot fragment page is stored in the process of even-numbered channels
Particularly as follows:
After receiving logical page (LPAGE) amendment data, if the page number of logical page (LPAGE) amendment data is odd number, logical page (LPAGE) is revised data
Revise data as odd, and generate corresponding odd number snapshot fragment；If the page number of logical page (LPAGE) amendment data is even number,
Logical page (LPAGE) is revised data and revises data as even pages, and generate corresponding even number snapshot fragment；
Odd number snapshot fragment or the even number snapshot fragment of generation are stored respectively to corresponding Physical Page；
After the Physical Page of storage odd number snapshot fragment is filled with, Physical Page is write with a brush dipped in Chinese ink to flash memory as odd number snapshot fragment page
In an interior odd chanel；
After the Physical Page of storage even number snapshot fragment is filled with, Physical Page is write with a brush dipped in Chinese ink to flash memory as even number snapshot fragment page
In an interior even-numbered channels；
When powered-off fault occurs in solid-state disk, fast by currently not yet writing with a brush dipped in Chinese ink to odd number snapshot fragment page and the even number of flash memory
Photo section page is write with a brush dipped in Chinese ink respectively to corresponding odd chanel and even-numbered channels.
As preferably, when reading powered-off fault in flash memory the map information of storage process particularly as follows:
Metadata information is read in flash memory；
The map information during powered-off fault recorded in obtaining metadata information.
As preferably, odd chanel and even-numbered channels are 2.
As preferably, N is 2, and a CPU reads odd number snapshot fragment page according to start-stop address, and obtains according to reading
Odd number snapshot fragment page the mapping table of last storage is updated operation；Another CPU reads according to start-stop address
Even number snapshot fragment page, and according to reading the even number snapshot fragment page obtained, the mapping table of last storage is updated behaviour
Make.
It is understood that when regardless of odd even, internal memory arranges the quantity at least two of snapshot fragment page, when one
When snapshot fragment page writes flash memory after being filled with, due to the needs regular hour, for there being new snapshot fragment in avoiding during this period of time
Produce, therefore also needed to another one snapshot fragment page as replacement.Therefore when dividing odd even, internal memory at least to arrange 4 soon
Photo section page, two as odd number snapshot fragment page, two as even number snapshot fragment page.Corresponding, odd chanel and even number
The most at least 1, passage.Corresponding, the number at least two of CPU, process in odd chanel and even-numbered channels respectively is fast
Photo section page, improves the ability of parallel processing, reduces the recovery time after powered-off fault.
Further, when odd chanel is multiple with even-numbered channels, what CPU can be corresponding arranges more than two, further
Reduce recovery time.Certainly, the number that arranges of CPU determines according to channel number and practical situation, and this is not limited by the present invention
Fixed.
The invention provides the mapping table restoration methods after a kind of solid-state disk powered-off fault, snapshot fragment page is divided into odd number
Snapshot fragment page and even number snapshot fragment page, respectively storage odd amendment data and even pages amendment number
According to；And the odd chanel that is stored respectively in flash memory of odd number snapshot fragment page and even number snapshot fragment page and even-numbered channels
In；When solid-state disk carries out power loss recovery, multiple CPU can be used to read odd number snapshot fragment page and even number snapshot respectively
Mapping table is also updated by fragment page.Visible, the parallel when present invention enhances power loss recovery by the way of odd even separates
Degree for the treatment of, and then shorten the time of power loss recovery, improve the reliability of solid-state disk.
Present invention also offers the mapping table recovery system after a kind of solid-state disk powered-off fault, include in the flash memory of solid-state disk
For storing the odd chanel of odd number snapshot fragment page and for storing the even-numbered channels of even number snapshot fragment page, odd number snapshot
Fragment page internal memory has odd to revise data, has even pages amendment data in even number snapshot fragment page；See Fig. 2
Shown in, the structural representation of the mapping table recovery system after a kind of solid-state disk powered-off fault that Fig. 2 provides for the present invention.This system
Including:
Read module 11, for when solid-state disk carries out power loss recovery, when reading powered-off fault in flash memory, storage reflects
Penetrate information and the flash memory mapping table of last storage before powered-off fault；Wherein, map information includes depositing for the last time
The positional information of mapping table of storage and the mapping table stored the last time start to write with a brush dipped in Chinese ink and are stored in sudden strain of a muscle after the moment of flash memory
The start-stop address of the snapshot fragment page deposited；
N number of CPU12, for reading odd number snapshot fragment page and even number snapshot fragment page respectively according to start-stop address；And
According to reading the odd number snapshot fragment page obtained and even number snapshot fragment page, the mapping table of last storage is updated
Operation, N is even number.
It should be noted that even number CPU12 reads the snapshot fragment page in odd chanel and even-numbered channels respectively.
The invention provides the mapping table recovery system after a kind of solid-state disk powered-off fault, snapshot fragment page is divided into odd number
Snapshot fragment page and even number snapshot fragment page, respectively storage odd amendment data and even pages amendment number
According to；And the odd chanel that is stored respectively in flash memory of odd number snapshot fragment page and even number snapshot fragment page and even-numbered channels
In；When solid-state disk carries out power loss recovery, multiple CPU can be used to read odd number snapshot fragment page and even number snapshot respectively
Mapping table is also updated by fragment page.Visible, the parallel when present invention enhances power loss recovery by the way of odd even separates
Degree for the treatment of, and then shorten the time of power loss recovery, improve the reliability of solid-state disk.
It should be noted that in this manual, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (7)
1. the mapping table restoration methods after a solid-state disk powered-off fault, it is characterised in that include in the flash memory of described solid-state disk
For storing the odd chanel of odd number snapshot fragment page and for storing the even-numbered channels of even number snapshot fragment page, described odd number
Snapshot fragment page internal memory has odd to revise data, has even pages amendment number in described even number snapshot fragment page
According to；Described method includes:
When described solid-state disk carries out power loss recovery, the map information stored when reading powered-off fault in described flash memory and institute
State flash memory mapping table of last storage before powered-off fault；Wherein, described map information includes described depositing for the last time
The positional information of the mapping table of storage and the mapping table of described last storage start to write with a brush dipped in Chinese ink to described flash memory moment it
After be stored in the start-stop address of snapshot fragment page of described flash memory；
N number of CPU reads odd number snapshot fragment page and even number snapshot fragment page respectively according to described start-stop address；And according to reading
The odd number snapshot fragment page obtained and even number snapshot fragment page are updated operation to the mapping table of described last storage,
N is even number.
Method the most according to claim 1, it is characterised in that the described described odd number snapshot fragment page obtained according to reading
And described even number snapshot fragment page the mapping table of described last storage is updated operation process particularly as follows:
The snapshot fragment page in respective channel is read by evening to order early according to the time being stored in described flash memory；
Judge that in the current snapshot fragment page read, corresponding logical page data was repaiied in this renewal process the most
Change, if so, ignore the amendment this time to described logical page data, if it is not, according to the snapshot fragment page of described current reading to institute
State logical page data to modify.
Method the most according to claim 1, it is characterised in that described odd number snapshot fragment page be stored in described odd chanel with
And described even number snapshot fragment page be stored in described even-numbered channels process particularly as follows:
After receiving logical page (LPAGE) amendment data, if the page number of described logical page (LPAGE) amendment data is odd number, described logical page (LPAGE) is revised
Data revise data as odd, and generate corresponding odd number snapshot fragment；If the page of described logical page (LPAGE) amendment data
Code is even number, as even pages, described logical page (LPAGE) amendment data is revised data, and generates corresponding even number snapshot fragment；
The described odd number snapshot fragment generated or described even number snapshot fragment are stored respectively to corresponding Physical Page；
After the Physical Page storing described odd number snapshot fragment is filled with, using described Physical Page as odd number snapshot fragment page brush
In the odd chanel being written in described flash memory；
After the Physical Page storing described even number snapshot fragment is filled with, using described Physical Page as even number snapshot fragment page brush
In the even-numbered channels being written in described flash memory；
When powered-off fault occurs in described solid-state disk, currently will not yet write with a brush dipped in Chinese ink the odd number snapshot fragment page to described flash memory and idol
Number snapshot fragment page is write with a brush dipped in Chinese ink respectively to corresponding odd chanel and even-numbered channels.
Method the most according to claim 1, it is characterised in that described storage during reading powered-off fault in described flash memory
The process of map information particularly as follows:
Metadata information is read in described flash memory；
Described map information during the powered-off fault recorded in obtaining described metadata information.
Method the most according to claim 1, it is characterised in that described odd chanel and described even-numbered channels are 2.
Method the most according to claim 1, it is characterised in that N is 2, a described CPU reads according to described start-stop address
Odd number snapshot fragment page, and according to reading the odd number snapshot fragment page obtained, the mapping table of described last storage is carried out more
New operation；Another described CPU reads even number snapshot fragment page according to described start-stop address, and fast according to reading the even number obtained
Photo section page is updated operation to the mapping table of described last storage.
7. the mapping table recovery system after a solid-state disk powered-off fault, it is characterised in that include in the flash memory of described solid-state disk
For storing the odd chanel of odd number snapshot fragment page and for storing the even-numbered channels of even number snapshot fragment page, described odd number
Snapshot fragment page internal memory has odd to revise data, has even pages amendment number in described even number snapshot fragment page
According to；Described system includes:
Read module, for when described solid-state disk carries out power loss recovery, stores when reading powered-off fault in described flash memory
Map information and described flash memory be the mapping table of last storage before powered-off fault；Wherein, described map information includes
The positional information of the mapping table of described last storage and start to write with a brush dipped in Chinese ink to institute at the mapping table of described last storage
The start-stop address of the snapshot fragment page of described flash memory it is stored in after the moment stating flash memory；
N number of CPU, for reading odd number snapshot fragment page and even number snapshot fragment page respectively according to described start-stop address；And root
The mapping table of described last storage is carried out more by the odd number snapshot fragment page and the even number snapshot fragment page that obtain according to reading
New operation, N is even number.
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| CN108804033A (en) * | 2018-05-18 | 2018-11-13 | 记忆科技(深圳)有限公司 | Scan full hard disk method, apparatus, computer equipment and the medium continued again based on power-off |
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| CN111125008A (en) * | 2019-12-20 | 2020-05-08 | 浪潮电子信息产业股份有限公司 | Dynamic repairing method and system of abnormal inode and related components |
| CN111462870A (en) * | 2020-05-14 | 2020-07-28 | 沈阳先进医疗设备技术孵化中心有限公司 | Data processing system and method |
| CN111949220A (en) * | 2020-09-03 | 2020-11-17 | 合肥沛睿微电子股份有限公司 | Abnormal power failure recovery method for storage device and storage device |
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