CN103257830A - Storage cell accessing method and storage cell - Google Patents
Storage cell accessing method and storage cell Download PDFInfo
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- CN103257830A CN103257830A CN2012100377437A CN201210037743A CN103257830A CN 103257830 A CN103257830 A CN 103257830A CN 2012100377437 A CN2012100377437 A CN 2012100377437A CN 201210037743 A CN201210037743 A CN 201210037743A CN 103257830 A CN103257830 A CN 103257830A
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Abstract
The invention discloses a storage cell accessing method which is applied to a storage cell. The storage cell comprises a plurality of storage areas, and the method is characterized by including recording written-in times of each storage area in the storage cell and transferring first-class data stored in a first storage area into a second storage area when the written-in times of the first storage area in the storage cell exceeds threshold times, wherein the written-in times of the second storage area are less than the threshold times. Therefore, the written-in times of each storage area in the storage cell can be similar as much as possible, damage to the storage area caused by the fact that one storage area in the storage cell is written in for too many times is avoided, and the whole service life of the storage cell is prolonged.
Description
Technical field
The present invention relates to field of computer technology, more specifically, the present invention relates to a kind of access method and storage unit of storage unit.
Background technology
Along with the continuous development of Computers and Communication technology, the storage unit such as solid state hard disc (SSD) is of common occurrence in our daily life.
Solid state hard disc is a kind of hard disk that adopts solid-state electronic storage chip array and make.The interface specification of solid state hard disc and definition, function and using method and common hard disk identical, and be widely used in various fields such as communication terminal, video monitoring.
Solid state hard disc can be divided into employing flash memory (Flash) or dynamic RAM (DRAM) as the solid state hard disc of storage medium according to the medium difference of its storage unit.Wherein, in the solid state hard disc based on flash memory, its storage unit can be divided into two classes again: single-layer type storage element (SLC) and multiple field storage element (MLC).Solid state hard disc based on flash memory generally uses at present in notebook, panel computer (PAD), digital camera or video camera etc.This SSD biggest advantage can move exactly, and data protection do not control by power supply, can be adapted to various environment.But generally speaking, their tenure of use is not high, and reading-writing life-span is also asymmetric.Be example with the solid state hard disc based on SLC, it can carry out the read operation more than 1,000,000 times, but but can only carry out the write operation about 10,000 times.Thereby how prolonging SSD serviceable life is the key issue that those skilled in the art face at present.
In the prior art, a kind of solution for the reading-writing life-span that prolongs solid state hard disc is, estimates the flash memory life-span and carries out corresponding optimization by (TRIM) technology of pruning.Yet, this mode only is to utilize the special algorithm in the TRIM technology to come the read-write number of times of each storage unit is roughly estimated, because the accuracy of this estimation is very not high, this has just caused for the optimization of flash reading and writing operation not accurate enough, thereby can't prolong SSD serviceable life well.
Another kind of solution is, in solid state hard disc, only carry out read-write operation by a part of storage unit, and the storage unit of reservation another part is as standby, when finding that some storage unit is owing to (for example exceeding the read-write number of times, writes indegree and surpass 10,000 times, or reading times is above 1,000,000 times) and during damage, adopt the storage unit of this standby storage unit replace damaged to come subsequent operation.Yet this solution has obviously been wasted a part of storage unit, has reduced the daily active volume of solid state hard disc.
Therefore, need a kind of reading/writing method of storage unit, its reading-writing life-span weak point and asymmetric characteristics of read-write number of times that can fully take into account storage unit are come storage unit is conducted interviews, to improve the serviceable life of storage unit.
Summary of the invention
In order to solve the problems of the technologies described above, according to an aspect of the present invention, a kind of access method of storage unit is provided, be applied to a storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that described method comprises: the number of times that is written into that records each storage area in the described storage unit; And be written into number of times when surpassing a threshold number when first storage area in the described storage unit, the primary sources of storing in described first storage area are transferred to second storage area, wherein, described second storage area is written into number of times less than described threshold number.
In addition, according to a further aspect in the invention, provide a kind of storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that described storage unit comprises: pen recorder, for the number of times that is written into of each storage area that records described storage unit; And transfer device, be used for when first storage area of described storage unit be written into number of times above a threshold number time, the primary sources of storing in described first storage area are transferred to second storage area, wherein, described second storage area is written into number of times less than described threshold number.
According to another aspect of the invention, a kind of access method of storage unit is provided, has been applied to a storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that described method comprises: the accessed number of times that records each storage area in the described storage unit; And when the accessed number of times of first storage area in the described storage unit surpasses a threshold number, the primary sources of storing in described first storage area are transferred to second storage area, wherein, the accessed number of times of described second storage area is less than described threshold number.
According to another aspect of the invention, provide a kind of storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that, described storage unit comprises: pen recorder, for the accessed number of times of each storage area that records described storage unit; And transfer device, when being used for accessed number of times when first storage area of described storage unit above a threshold number, the primary sources of storing in described first storage area are transferred to second storage area, wherein, the accessed number of times of described second storage area is less than described threshold number.
Compared with prior art, employing is according to access method and the storage unit of storage unit of the present invention, each storage area in can record storage unit be written into number of times, and when a certain storage area be written into number of times when surpassing a threshold number, the data of storing in the described storage area are transferred to are written into number of times less than other storage areas of described threshold number.Therefore, the present invention can so that each storage area in the storage unit to be written into number of times similar as far as possible, and prevented owing to the writing of too much number of times for certain storage area in the storage unit causes this storage area to damage, thereby prolonged the bulk life time of storage unit.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in instructions, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 illustrates the access method according to storage unit of the present invention.
Fig. 2 illustrates according to storage unit of the present invention.
Fig. 3 illustrates the access method according to the storage unit of the embodiment of the invention.
Fig. 4 illustrates the storage unit according to the embodiment of the invention.
Embodiment
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention.Here, it should be noted that in the accompanying drawings, identical Reference numeral is given had ingredient identical or similar structures and function basically, and will omit being repeated in this description about them.
Hereinafter, will access method and storage unit according to storage unit of the present invention be described with reference to Fig. 1 and 2.
Fig. 1 illustrates the access method according to storage unit of the present invention.
Access method according to the present invention is applied to a storage unit, and described storage unit comprises a plurality of storage areas.Particularly, described method comprises:
In step S110, record the number of times that is written into of each storage area in the described storage unit; And
In step S120, be written into number of times when surpassing a threshold number when first storage area in the described storage unit, the primary sources of storing in described first storage area are transferred to second storage area, wherein, described second storage area be written into number of times less than described threshold number.
Fig. 2 illustrates according to storage unit 200 of the present invention.
This shows, employing is according to access method and the storage unit of storage unit of the present invention, each storage area in can record storage unit be written into number of times, and when a certain storage area be written into number of times when surpassing a threshold number, the data of storing in the described storage area are transferred to are written into number of times less than other storage areas of described threshold number.Therefore, the present invention can so that each storage area in the storage unit to be written into number of times similar as far as possible, and prevented owing to the writing of too much number of times for certain storage area in the storage unit causes this storage area to damage, thereby prolonged the bulk life time of storage unit.
Below, will as the example of storage unit embodiments of the invention be described based on the solid state hard disc of SLC, the admissible reading times of this solid state hard disc is many, and it is few to write indegree.Although herein by being applied to based on the solid state hard disc of SLC the present invention is described according to access method and the storage unit of storage unit of the present invention, but, those skilled in the art can be understood that, the invention is not restricted to this, but can be applied to other storage unit, for example, adopt dynamic RAM as the asymmetric storage unit of solid state hard disc, reading-writing life-span of storage medium or common hard disk etc.
Hereinafter, will access method and storage unit according to the storage unit of the embodiment of the invention be described with reference to figure 3 and 4.
Fig. 3 illustrates the access method according to the storage unit of the embodiment of the invention, and Fig. 4 illustrates the storage unit 200 according to the embodiment of the invention.
The access method of the illustrated storage unit according to the embodiment of the invention of Fig. 3 can be applied to the illustrated storage unit 200 of Fig. 4.The same with the illustrated storage unit of Fig. 2 200, illustrated as Fig. 4, also comprise a plurality of storage area 201-20n, pen recorder 210 and transfer device 220 according to the storage unit 200 of the embodiment of the invention.Wherein, described pen recorder 210 further comprises: map building module 2110 and number of times logging modle 2120.
Illustrated as Fig. 3, comprise according to the access method of the storage unit of the embodiment of the invention:
In step S310, each storage area in the record storage unit be written into number of times.
As mentioned above, solid state hard disc 200 comprises a plurality of storage area 201-20n, pen recorder 210 and transfer device 220.For example, when using solid state hard disc 200 for the first time, the map building module 2110 in the pen recorder 210 is created the global map that is used for each storage area of record (for example, sector or piece (block)) in this solid state hard disc 200.Wherein, for example, can create this global map according to forms such as form, file or databases.
Then, number of times logging modle 2120 in this global map, records the number of times that is written into of each storage area according to the physical address of each storage area.
Below, be example with the form, reference table 1 is described the global map according to the embodiment of the invention particularly.
Table 1
| The physical address of storage area | Be written into number of times |
| 0x00000001 | 8000 |
| 0x00000002 | 0 |
| 0x00000003 | 2000 |
| ...... | |
| 0x0000000n | 4000 |
As shown in table 1, this global map comprises the physical address of storage area and the number of times that is written into.The physical address of expressing first storage area 201 in first in table 1 is 0x00000001, the number of times that is written into that it is current is 8000, the physical address of expressing second storage area 202 in second is 0x00000002, the number of times that is written into that it is current is 0, the physical address of expressing the 3rd storage area 203 in the 3rd is 0x00000003, the number of times that is written into that it is current is 2000, by that analogy.
When a certain storage area was write one time by new near-earth, number of times logging modle 2120 added 1 and upgrades this global map by corresponding with this storage area number of times that is written into that will record in global map.
In step S320, whether the number of times that is written into of each storage area in the detection of stored unit surpasses a threshold number.
In solid state hard disc 200, transfer device 220 detects being written into number of times and whether surpassing a threshold value and write indegree of each storage area among n the storage area 201-20n in the solid state hard disc 200 in real time.Certainly, it will be appreciated by persons skilled in the art that transfer device 220 also can be periodically or carry out above-mentioned detection operation randomly.
In an embodiment of the present invention, be example with the solid state hard disc based on SLC, it can carry out the read operation more than 1,000,000 times, but but can only carry out the write operation about 10,000 times.Thereby, preferably, can this threshold value write indegree and be set to all write 80% of indegree, namely 8000 times.Certainly, it will be appreciated by persons skilled in the art that also can this threshold value writing indegree is set to other numerical value.
If detecting the number of times that is written into of some storage areas in the solid state hard disc 200, transfer device 220 surpasses 8000 times, execution in step S330 then, otherwise, continue to carry out this step S320.
In step S330, the primary sources of storing in first storage area are transferred to second storage area, wherein, described second storage area be written into number of times less than described threshold number.
Herein, to use the sight in computing machine to describe as example solid state hard disc 200.In the normal use of computing machine, need read and write heap file.Generally speaking, in solid state hard disc 200, (for example, the write operation of storage area cookie) is comparatively frequent, and the storage area that is used for the storage operating system file is then less to be performed write operation for the temporary file when being used for the storage browsing page.
Suppose that first storage area 201 in the solid state hard disc 200 is for the storage area of storing the Internet (Internet) temporary file, then in the normal use of computing machine, be accompanied by the user and browse various websites, a large amount of temporary files will be produced, and these temporary files can be modified also along with the continual renovation of website.Thereby first storage area 201 will be carried out write operation frequently, thereby its number of times that is written into increases comparatively frequently.
And, suppose that second storage area 202 in the solid state hard disc 200 is not written into any data as yet.
In addition, suppose that the 3rd storage area 203 in the solid state hard disc 200 is the storage areas for the storage operating system file, then when the normal use of computing machine, because the user can often not change operating system file, so can not carry out write operation to the 3rd storage area 203 frequently, thereby its number of times that is written into increases comparatively slowly.
In the case since first storage area 201 to be performed write operation more, so compare with other storage areas, it be written into number of times with the very fast threshold number that surpasses 8000 times.
When first storage area 201 be written into number of times when surpassing 8000 times, transfer device 220 is transferred to the data of storage in first storage area 201 and is written into number of times less than the storage area of threshold number.
For example, transfer device 220 can be transferred to second storage area 202 (as shown in table 1) that is written into least number of times that records with the Internet temporary file of storage in this first storage area 201 in global map.
Alternatively, for example, transfer device 220 also can with in this first storage area 201 storage the Internet temporary file be transferred in solid state hard disc 200 be written into number of times be not minimum, but be written into the minimum storage area of frequency (namely, compare with other storage areas, just can carry out write operation to this storage area for a long time at interval).
In step S340, the part secondary sources of storing in other storage areas are transferred to described first storage area, wherein, to compare with described primary sources, the number of times that described secondary sources were written in the identical time is still less.
Because though this first storage area 201 has surpassed 8000 times threshold number, but in fact can also carry out about about 2000 times write operation to it, so in order to utilize this first storage area 201 fully, to avoid the waste of the storage space in the solid state hard disc 200, preferably, transfer device 220 is transferred to described first storage area with the partial data of storing in other storage areas except first storage area 201 in the solid state hard disc 200.
In one example, when in step S330 with this first storage area 201 in the storage the Internet temporary file be transferred to second storage area 202 after, in step S340, transfer device 220 can be transferred to the operating system file of storage in the 3rd storage area 203 in this first storage area 201, make that will be written into the 3rd less storage area 203 of number of times frees out, to be used for writing other data.As mentioned above, the file of operating system is compared with the Internet temporary file, the number of times much less that is changed in the identical time.
In another example, also can step S330 and S340 in, the Internet temporary file that will store in first storage area 201 exchanges with the operating system file of storage in the 3rd storage area 203.
Particularly, before storing into the data in first storage area 201 in the 3rd storage area 203 in step S330, the operating system file that transfer device 220 will be stored in the 3rd storage area 203 copies in the memory buffer (not shown) that is electrically connected with solid state hard disc 200.Then, the Internet temporary file that transfer device 220 will be stored in first storage area 201 copies in the 3rd storage area 203, and deletes the Internet temporary file of storage in this first storage area 201.At last, transfer device 220 reads this operating system file from the buffering storer, and it is stored in described first storage area 201.
This shows, employing is according to access method and the storage unit of the storage unit of the embodiment of the invention, can in storage unit, add global map, in order to record the number of times that is written into of each storage area, and be written into number of times when reaching certain threshold values when one or more storage areas, the data that the needs in these storage areas often can be write are transferred to and are written in the less storage area of number of times, to prevent too much damaging these storage areas owing to being written into number of times; In addition, the data (for example, system file) in another one or a plurality of storage area that seldom writes can also be transferred to these storage areas, free out for writing thereby it is written into the less storage area of number of times.Therefore, embodiments of the invention have overcome the shortcoming of solution in the prior art, balanced better each storage area in the storage unit be written into number of times, thereby improved the bulk life time of storage unit.
Need to prove, although top be that example has illustrated the present invention so that the write operation of storage area in the storage unit is counted, yet, the invention is not restricted to this.
The inventor fully takes into account, and the asymmetric problem of storage unit reading-writing life-span can comprise that also reading times is few, write situation often except comprising that reading times is many, writing the few situation of indegree.
For make the present invention not only can be applied to reading times of the prior art many, write the few employing flash memory of indegree as the solid state hard disc of storage medium, but also can be applied to the reading times that may occur in the future few, write storage unit often, the inventor further imagines: preferably, can comprise according to access method of the present invention:
Record accessed (comprising: be written into and/or be read) number of times of each storage area in the described storage unit; And
When the accessed number of times of first storage area in the described storage unit surpasses a threshold number, the primary sources of storing in described first storage area are transferred to second storage area, wherein, the accessed number of times of described second storage area is less than described threshold number.
This shows, employing is according to access method and the storage unit of storage unit of the present invention, each storage area in can record storage unit be written into and/or be read number of times, and when being written into and/or being read number of times and surpass threshold number of a certain storage area, the data of storing in the described storage area are transferred to are written into and/or are read number of times less than other storage areas of described threshold number.Therefore, the present invention can so that each storage area in the storage unit to be written into and/or to be read number of times similar as far as possible, and prevented owing to for the writing and/or be read and cause this storage area to damage of the too much number of times of certain storage area in the storage unit, thereby prolonged the bulk life time of storage unit.
Describe each embodiment of the present invention in the above in detail.Yet, it should be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, can carry out various modifications to these embodiment, combination or sub-portfolio, and such modification should fall within the scope of the present invention.
Claims (12)
1. the access method of a storage unit is applied to a storage unit, and described storage unit comprises a plurality of storage areas, it is characterized in that, described method comprises:
Record the number of times that is written into of each storage area in the described storage unit; And
When first storage area in the described storage unit be written into number of times when surpassing a threshold number, the primary sources of storing in described first storage area are transferred to second storage area,
Wherein, described second storage area is written into number of times less than described threshold number.
2. according to the method for claim 1, it is characterized in that described method also comprises:
The part secondary sources of storing in other storage areas except described first storage area in the described storage unit are transferred to described first storage area,
Wherein, compare with described primary sources, the number of times that described secondary sources were written in the identical time still less.
3. according to the method for claim 1, it is characterized in that the step that is written into number of times of each storage area in the described storage unit of described record comprises:
In described storage unit, create a global map;
According to the physical address of each storage area, in described global map, record the number of times that is written into of each storage area.
4. according to the method for claim 1, it is characterized in that described second storage area is the storage area that is written into least number of times in the described storage unit.
5. according to the method for claim 1, it is characterized in that described second storage area is to be written into the minimum storage area of frequency in the described storage unit.
6. storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that, described storage unit comprises:
Pen recorder is for the number of times that is written into of each storage area that records described storage unit; And
Transfer device, be used for when first storage area of described storage unit be written into number of times above a threshold number time, the primary sources of storing in described first storage area are transferred to second storage area,
Wherein, described second storage area is written into number of times less than described threshold number.
7. according to the storage unit of claim 6, it is characterized in that described transfer device also is used for the part secondary sources of storing in described storage unit other storage areas except described first storage area are transferred to described first storage area,
Wherein, compare with described primary sources, the number of times that described secondary sources were written in the identical time still less.
8. according to the storage unit of claim 6, it is characterized in that pen recorder comprises:
The map building module is used for creating a global map in described storage unit;
The number of times logging modle is used for the physical address according to each storage area, in described global map, records the number of times that is written into of each storage area.
9. according to the storage unit of claim 6, it is characterized in that described second storage area is the storage area that is written into least number of times in the described storage unit.
10. according to the storage unit of claim 6, it is characterized in that described second storage area is to be written into the minimum storage area of frequency in the described storage unit.
11. the access method of a storage unit is applied to a storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that, described method comprises:
Record the accessed number of times of each storage area in the described storage unit; And
When the accessed number of times of first storage area in the described storage unit surpasses a threshold number, the primary sources of storing in described first storage area are transferred to second storage area,
Wherein, the accessed number of times of described second storage area is less than described threshold number.
12. a storage unit, described storage unit comprises a plurality of storage areas, it is characterized in that, described storage unit comprises:
Pen recorder is for the accessed number of times of each storage area that records described storage unit; And
Transfer device when being used for accessed number of times when first storage area of described storage unit above a threshold number, is transferred to second storage area with the primary sources of storing in described first storage area,
Wherein, the accessed number of times of described second storage area is less than described threshold number.
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| CN108984111A (en) * | 2017-05-30 | 2018-12-11 | 希捷科技有限公司 | Data storage device with rewritable original place memory |
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| CN103699030A (en) * | 2013-12-06 | 2014-04-02 | 中联重科股份有限公司 | Working parameter saving device, system and method of operating mechanisms of engineering machinery |
| CN106201346B (en) * | 2016-06-30 | 2019-06-25 | 联想(北京)有限公司 | A kind of data processing method and storage equipment |
| CN106201346A (en) * | 2016-06-30 | 2016-12-07 | 联想(北京)有限公司 | A kind of data processing method and storage device |
| CN106371762A (en) * | 2016-08-19 | 2017-02-01 | 浪潮(北京)电子信息产业有限公司 | Optimization method and system of storage data |
| CN108984111B (en) * | 2017-05-30 | 2021-09-14 | 希捷科技有限公司 | Data storage device with rewritable in-place memory |
| CN108984111A (en) * | 2017-05-30 | 2018-12-11 | 希捷科技有限公司 | Data storage device with rewritable original place memory |
| CN110895444A (en) * | 2018-09-12 | 2020-03-20 | 厦门歌乐电子企业有限公司 | Electronic equipment and data reading and writing method |
| CN110018797A (en) * | 2019-04-11 | 2019-07-16 | 苏州浪潮智能科技有限公司 | A kind of data migration method, device, equipment and readable storage medium storing program for executing |
| CN113452726A (en) * | 2020-03-24 | 2021-09-28 | 中兴通讯股份有限公司 | Data transmission method, terminal and computer readable storage medium |
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| CN114296634A (en) * | 2021-12-03 | 2022-04-08 | 珠海格力电器股份有限公司 | Method and device for detecting utilization rate of memory resources and allocating memory |
| CN114296634B (en) * | 2021-12-03 | 2024-01-30 | 珠海格力电器股份有限公司 | Method and device for detecting and storing and distributing memory resource utilization rate |
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