CN105975403A - Address mapping method and system as well as solid-state disk - Google Patents
Address mapping method and system as well as solid-state disk Download PDFInfo
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- CN105975403A CN105975403A CN201610274370.3A CN201610274370A CN105975403A CN 105975403 A CN105975403 A CN 105975403A CN 201610274370 A CN201610274370 A CN 201610274370A CN 105975403 A CN105975403 A CN 105975403A
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- address mapping
- mapping
- solid state
- hard disc
- state hard
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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
- G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
- G06F12/0615—Address space extension
Abstract
The invention discloses an address mapping method and system as well as a solid-state disk. The method comprises the steps of determining the capacity of a mapping table in the solid-state disk; judging whether the capacity is greater than a preset capacity threshold or not; if the capacity is greater than the preset capacity threshold, setting an address mapping mechanism of the solid-state disk as a first address mapping mechanism; and if the capacity is smaller than or equal to the preset capacity threshold, setting the address mapping mechanism of the solid-state disk as a second address mapping mechanism, wherein the mapping table capacity required by the first address mapping mechanism is smaller than that of the second address mapping mechanism, and the mapping performance of the second address mapping mechanism is superior to that of the first address mapping mechanism. According to the method and system as well as the solid-state disk, the advantages of two different address mapping mechanisms can be combined, so that the solid-state disk can have relatively high mapping performance while the mapping table of the solid-state disk occupies relatively small space.
Description
Technical field
The present invention relates to solid state hard disc technical field, particularly to a kind of address mapping method, system and solid
State hard disk.
Background technology
Currently, SSD (i.e. Solid State Drives, solid state hard disc) needs to be reflected by a certain address
Penetrate mechanism, the logical address from file system is converted into corresponding physical address.
And Address Mapping conventional in solid state hard disc includes that page address mapping mechanism, block address map machine
System and combined address mapping mechanism.These three Address Mapping has respective pluses and minuses, such as,
The mapping performance of page address mapping mechanism is outstanding, but its required mapping table capacity is bigger；Block address maps
The mapping performance of mechanism is poor, but its required mapping table capacity is the most much smaller；And combined address reflects
The mechanism of penetrating by then pass through combine page address mapping mechanism and block address mapping mechanism after a kind of ground of obtaining
Location mapping mechanism, its pluses and minuses are between page address mapping mechanism and block address mapping mechanism.
Due to current solid state hard disc otherwise be use page address mapping mechanism, or be use block address map
Mechanism or combined address mapping mechanism, so that existing solid state hard disc or mapping performance are poor, or
Mapping table needs to take bigger space.
In sum it can be seen that how while the mapping table of solid state hard disc takies less space, really
Protect solid state hard disc having higher mapping performance is to have problem to be solved at present.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of address mapping method, system and solid state hard disc,
While the mapping table of solid state hard disc takies less space, it is ensured that solid state hard disc has higher mapping
Performance.Its concrete scheme is as follows:
A kind of address mapping method being applied to solid state hard disc, including:
Determine the amount of capacity of mapping table in solid state hard disc；
Judge that whether described amount of capacity is more than preset capacity threshold value；
If described amount of capacity is more than described preset capacity threshold value, then the address of described solid state hard disc is mapped
Mechanism is set to the first Address Mapping；
If described amount of capacity is less than or equal to described preset capacity threshold value, then by the ground of described solid state hard disc
Location mapping mechanism is set to the second Address Mapping；
Wherein, the mapping table capacity needed for described first Address Mapping maps less than described second address
Mapping table capacity needed for mechanism, and the mapping performance of described second Address Mapping self is better than described
The mapping performance of the first Address Mapping self.
Preferably, described preset capacity threshold value is the storage size previously according to described solid state hard disc,
The threshold value about mapping table capacity determined.
Preferably, described first Address Mapping is combined address mapping mechanism, and described second address is reflected
The mechanism of penetrating is page address mapping mechanism.
Preferably, described first Address Mapping is block address mapping mechanism, and described second address maps
Mechanism is page address mapping mechanism.
Preferably, described first Address Mapping is block address mapping mechanism, and described second address maps
Mechanism is combined address mapping mechanism.
Preferably, described address mapping method, also include: according to the default refuse cleaning cycle, periodically
The mapping table lost efficacy in described solid state hard disc is cleared up.
The invention also discloses a kind of address mapping system being applied to solid state hard disc, including:
Capacity determines module, for determining the amount of capacity of mapping table in solid state hard disc；
Judge module, is used for judging that whether described amount of capacity is more than preset capacity threshold value；
Map control module, for when described amount of capacity is more than described preset capacity threshold value, then by described
The Address Mapping of solid state hard disc is set to the first Address Mapping, when described amount of capacity less than or etc.
In described preset capacity threshold value, then the Address Mapping of described solid state hard disc is set to the second address and maps
Mechanism；
Wherein, the mapping table capacity needed for described first Address Mapping maps less than described second address
Mapping table capacity needed for mechanism, and the mapping performance of described second Address Mapping self is better than described
The mapping performance of the first Address Mapping self.
Preferably, described first Address Mapping is combined address mapping mechanism, and described second address is reflected
The mechanism of penetrating is page address mapping mechanism.
Preferably, described address mapping system, also include:
Cleaning module, for according to the default refuse cleaning cycle, periodically lost efficacy in described solid state hard disc
Mapping table clear up.
The invention also discloses a kind of solid state hard disc, including aforesaid address mapping system.
In the present invention, address mapping method comprises determining that the amount of capacity of mapping table in solid state hard disc；So
Rear judge that amount of capacity is whether more than preset capacity threshold value；If amount of capacity is more than preset capacity threshold value, then
The Address Mapping of solid state hard disc is set to the first Address Mapping；If amount of capacity is less than or equal to
Preset capacity threshold value, then be set to the second Address Mapping by the Address Mapping of solid state hard disc；Wherein,
Mapping table capacity needed for first Address Mapping holds less than the mapping table needed for the second Address Mapping
Measure, and the mapping performance of the second Address Mapping self is better than the mapping of the first Address Mapping self
Performance.Visible, the present invention can select neatly according to the amount of capacity degree of mapping table in solid state hard disc
Select different Address Mapping.It is less than or equal to preset that is, work as the capacity of mapping table in solid state hard disc
Capacity threshold, owing to the capacity of now mapping table is less, so preferable second ground of mapping performance can be used
Location mapping mechanism is as the Address Mapping of solid state hard disc；When in solid state hard disc, the capacity of mapping table is more than
Predetermined threshold value, owing to the capacity of now mapping table is bigger, it is possible to use to mapping table capacity requirement relatively
The first low Address Mapping.As fully visible, the present invention combines two kinds of different address mapping mechanisms
Advantage so that while the mapping table of solid state hard disc takies less space, it is ensured that solid state hard disc has
Higher mapping performance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 is a kind of address mapping method flow chart being applied to solid state hard disc disclosed in the embodiment of the present invention；
Fig. 2 is that disclosed in the embodiment of the present invention, a kind of address mapping system structure being applied to solid state hard disc is shown
It is intended to.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
The embodiment of the invention discloses a kind of address mapping method being applied to solid state hard disc, see Fig. 1 institute
Showing, the method includes:
Step S11: determine the amount of capacity of mapping table in solid state hard disc；
Step S12: judge that whether above-mentioned amount of capacity is more than preset capacity threshold value；
Step S13: if above-mentioned amount of capacity is more than preset capacity threshold value, then the address of solid state hard disc is mapped
Mechanism is set to the first Address Mapping；If above-mentioned amount of capacity is less than or equal to preset capacity threshold value, then
The Address Mapping of solid state hard disc is set to the second Address Mapping；
Wherein, the mapping table capacity needed for the first Address Mapping is less than needed for the second Address Mapping
Mapping table capacity, and the mapping performance of the second Address Mapping self is better than the first Address Mapping
The mapping performance of self.
It should be noted that the amount of capacity of mapping table in solid state hard disc, namely mapping table in solid state hard disc
The size taken up space, is dynamically change, it will usually along with solid state hard disc uses the change of time to occur
Change.In step S11, what is called determines the amount of capacity of mapping table in solid state hard disc, refers to determine that solid-state is hard
The current shared storage size having mapping table in dish.
In addition, it is necessary to further illustrate, the preset capacity threshold value in above-mentioned steps S12 is specially in advance
According to the storage size of solid state hard disc, the threshold value about mapping table capacity determined.As a rule,
The size of above-mentioned preset capacity threshold value and the size correlation of solid state hard disc memory space, that is,
Solid state hard disc memory space is the biggest, and above-mentioned preset capacity threshold value the most just can be set to a bigger numerical value.
Visible, the embodiment of the present invention can be come flexibly according to the amount of capacity degree of mapping table in solid state hard disc
Ground selects different Address Mapping.It is less than or equal to that is, work as the capacity of mapping table in solid state hard disc
Preset capacity threshold value, owing to the capacity of now mapping table is less, so mapping performance preferable can be used
Double-address mapping mechanism is as the Address Mapping of solid state hard disc；When the capacity of mapping table in solid state hard disc
More than predetermined threshold value, owing to the capacity of now mapping table is bigger, it is possible to use and mapping table capacity is needed
Seek the first relatively low Address Mapping.As fully visible, the embodiment of the present invention combines two kinds of different addresses
The advantage of mapping mechanism so that while the mapping table of solid state hard disc takies less space, it is ensured that Gu
State hard disk has higher mapping performance.
The embodiment of the invention discloses a kind of concrete address mapping method being applied to solid state hard disc, relatively
In a upper embodiment, technical scheme has been made further instruction and optimization by the present embodiment.Concrete:
According to the mapping table capacity needed for a upper embodiment, the first Address Mapping less than the second ground
Mapping table capacity needed for the mapping mechanism of location, and the mapping performance of the second Address Mapping self is better than
The mapping performance of one Address Mapping self.Based on this rule, the embodiment of the invention discloses following
Three kinds of feasible assembled schemes.Wherein,
The first assembled scheme specifically, the first Address Mapping is combined address mapping mechanism, second
Address Mapping is page address mapping mechanism.
The second assembled scheme specifically, the first Address Mapping is block address mapping mechanism, the second ground
Location mapping mechanism is page address mapping mechanism.
The third assembled scheme specifically, the first Address Mapping is block address mapping mechanism, the second ground
Location mapping mechanism is combined address mapping mechanism.
Needing illustratively, the basic map unit of above-mentioned page address mapping mechanism is page, this
Under mechanism, each logical page (LPAGE) is mapped to any one Physical Page.Page address mapping mechanism has information
The advantage of the aspects such as management flexibility ratio height, space availability ratio height and garbage reclamation load are little, that is, reflect
Penetrate better performances, but the mapping table capacity that this mechanism needs is bigger.Above-mentioned block address mapping mechanism
The basic unit that maps is block, and under this mechanism, first whole address space is represented as multiple pieces, and
Each piece comprises again multiple page, and each page is determined by affiliated block number and block bias internal amount.Block ground
Location mapping mechanism only needs the least ram space to carry out memory map assignments information, but this mapping mechanism is ineffective
Living, logical page (LPAGE) can only be mapped to same Physical Page, and mapping performance is relatively poor.And combined address reflects
The mechanism of penetrating is then a kind of address by obtaining after combining page address mapping mechanism and block address mapping mechanism
Mapping mechanism, its pluses and minuses are between page address mapping mechanism and block address mapping mechanism.
Understanding based on foregoing, needed for above-mentioned three kinds of mapping mechanisms, the magnitude relationship of mapping table is: page ground
Location mapping mechanism > combined address mapping mechanism > block address mapping mechanism.Above-mentioned three kinds of mapping mechanism mappings
The magnitude relationship of energy is: page address mapping mechanism > combined address mapping mechanism > block address mapping mechanism.
Visible, the embodiment of the present invention, can be neatly according to the amount of capacity degree of mapping table in solid state hard disc
Select different Address Mapping.It is less than or equal to pre-that is, work as the capacity of mapping table in solid state hard disc
If capacity threshold, employing preferable second Address Mapping of mapping performance is reflected as the address of solid state hard disc
Penetrate mechanism；When in solid state hard disc, the capacity of mapping table more than predetermined threshold value, then uses and needs mapping table capacity
Seek the first relatively low Address Mapping.Address is selected flexibly according to mapping table amount of capacity by this
The mode of mapping mechanism can the advantage of comprehensive two kinds of different address mapping mechanisms so that at solid state hard disc
While mapping table takies less space, it is ensured that solid state hard disc has higher mapping performance.
In order to reduce the impact that solid state hard disc mapping performance is caused by inefficacy mapping table, the ground in the present embodiment
Location mapping method, it is also possible to farther include: according to the default refuse cleaning cycle, periodically hard to solid-state
The mapping table lost efficacy in dish is cleared up.
Accordingly, the embodiment of the invention also discloses a kind of address mapping system being applied to solid state hard disc,
Shown in Figure 2, this system includes:
Capacity determines module 21, for determining the amount of capacity of mapping table in solid state hard disc；
Judge module 22, is used for judging that whether amount of capacity is more than preset capacity threshold value；
Map control module 23, for when amount of capacity is more than preset capacity threshold value, then by solid state hard disc
Address Mapping is set to the first Address Mapping, when amount of capacity is less than or equal to preset capacity threshold value,
Then the Address Mapping of solid state hard disc is set to the second Address Mapping；
Wherein, the mapping table capacity needed for the first Address Mapping is less than needed for the second Address Mapping
Mapping table capacity, and the mapping performance of the second Address Mapping self is better than the first Address Mapping
The mapping performance of self.
Need it is further noted that above-mentioned preset capacity threshold value is specially depositing previously according to solid state hard disc
Storage space size, the threshold value about mapping table capacity determined.As a rule, above-mentioned preset capacity threshold value
The size correlation of size and solid state hard disc memory space, that is, solid state hard disc memory space
The biggest, above-mentioned preset capacity threshold value the most just can be set to a bigger numerical value.
According to the mapping table capacity needed for foregoing, the first Address Mapping less than the second address
Mapping table capacity needed for mapping mechanism, and the mapping performance of the second Address Mapping self is better than first
The mapping performance of Address Mapping self.Based on this rule, the embodiment of the invention discloses following three
Plant feasible assembled scheme.Wherein,
The first assembled scheme specifically, the first Address Mapping is combined address mapping mechanism, second
Address Mapping is page address mapping mechanism.
The second assembled scheme specifically, the first Address Mapping is block address mapping mechanism, the second ground
Location mapping mechanism is page address mapping mechanism.
The third assembled scheme specifically, the first Address Mapping is block address mapping mechanism, the second ground
Location mapping mechanism is combined address mapping mechanism.
In order to reduce the impact that solid state hard disc mapping performance is caused by inefficacy mapping table, the ground in the present embodiment
Location mapped system, it is also possible to farther include:
Cleaning module, for according to the default refuse cleaning cycle, periodically reflects inefficacy in solid state hard disc
Firing table is cleared up.
Visible, the embodiment of the present invention can be come flexibly according to the amount of capacity degree of mapping table in solid state hard disc
Ground selects different Address Mapping.It is less than or equal to that is, work as the capacity of mapping table in solid state hard disc
Preset capacity threshold value, owing to the capacity of now mapping table is less, so mapping performance preferable can be used
Double-address mapping mechanism is as the Address Mapping of solid state hard disc；When the capacity of mapping table in solid state hard disc
More than predetermined threshold value, owing to the capacity of now mapping table is bigger, it is possible to use and mapping table capacity is needed
Seek the first relatively low Address Mapping.As fully visible, the embodiment of the present invention combines two kinds of different addresses
The advantage of mapping mechanism so that while the mapping table of solid state hard disc takies less space, it is ensured that Gu
State hard disk has higher mapping performance.
It addition, the embodiment of the present invention further discloses a kind of solid state hard disc, including aforementioned disclosed ground
Location mapped system.Detailed content about this address mapping system refers to the phase disclosed in previous embodiment
Closing content, at this, it is no longer repeated.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like
It is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires
Or imply relation or the order that there is any this reality between these entities or operation.And, art
Language " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, thus
Make to include that the process of a series of key element, method, article or equipment not only include those key elements, and
Also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that person's equipment is intrinsic.In the case of there is no more restriction, by statement " including ... "
The key element limited, it is not excluded that also deposit in including the process of described key element, method, article or equipment
In other identical element.
Above a kind of address mapping method provided by the present invention, system and solid state hard disc are carried out in detail
Introducing, principle and the embodiment of the present invention are set forth by specific case used herein, above
The explanation of embodiment is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for this
The those skilled in the art in field, according to the thought of the present invention, the most all
Will change, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. the address mapping method being applied to solid state hard disc, it is characterised in that including:
Determine the amount of capacity of mapping table in solid state hard disc；
Judge that whether described amount of capacity is more than preset capacity threshold value；
If described amount of capacity is more than described preset capacity threshold value, then the address of described solid state hard disc is mapped
Mechanism is set to the first Address Mapping；
If described amount of capacity is less than or equal to described preset capacity threshold value, then by the ground of described solid state hard disc
Location mapping mechanism is set to the second Address Mapping；
Wherein, the mapping table capacity needed for described first Address Mapping maps less than described second address
Mapping table capacity needed for mechanism, and the mapping performance of described second Address Mapping self is better than described
The mapping performance of the first Address Mapping self.
The address mapping method being applied to solid state hard disc the most according to claim 1, it is characterised in that
Described preset capacity threshold value is the storage size previously according to described solid state hard disc, determine about reflecting
The threshold value of firing table capacity.
The address mapping method being applied to solid state hard disc the most according to claim 1, it is characterised in that
Described first Address Mapping is combined address mapping mechanism, and described second Address Mapping is page ground
Location mapping mechanism.
The address mapping method being applied to solid state hard disc the most according to claim 1, it is characterised in that
Described first Address Mapping is block address mapping mechanism, and described second Address Mapping is page address
Mapping mechanism.
The address mapping method being applied to solid state hard disc the most according to claim 1, it is characterised in that
Described first Address Mapping is block address mapping mechanism, and described second Address Mapping is mixedly
Location mapping mechanism.
6. according to the address mapping method being applied to solid state hard disc described in any one of claim 1 to 5,
It is characterized in that, also include:
According to the default refuse cleaning cycle, periodically the mapping table lost efficacy in described solid state hard disc is carried out clearly
Reason.
7. the address mapping system being applied to solid state hard disc, it is characterised in that including:
Capacity determines module, for determining the amount of capacity of mapping table in solid state hard disc；
Judge module, is used for judging that whether described amount of capacity is more than preset capacity threshold value；
Map control module, for when described amount of capacity is more than described preset capacity threshold value, then by described
The Address Mapping of solid state hard disc is set to the first Address Mapping, when described amount of capacity less than or etc.
In described preset capacity threshold value, then the Address Mapping of described solid state hard disc is set to the second address and maps
Mechanism；
Wherein, the mapping table capacity needed for described first Address Mapping maps less than described second address
Mapping table capacity needed for mechanism, and the mapping performance of described second Address Mapping self is better than described
The mapping performance of the first Address Mapping self.
The address mapping system being applied to solid state hard disc the most according to claim 7, it is characterised in that
Described first Address Mapping is combined address mapping mechanism, and described second Address Mapping is page ground
Location mapping mechanism.
9. according to the address mapping system being applied to solid state hard disc described in claim 7 or 8, its feature
It is, also includes:
Cleaning module, for according to the default refuse cleaning cycle, periodically lost efficacy in described solid state hard disc
Mapping table clear up.
10. a solid state hard disc, it is characterised in that include as described in any one of claim 7 to 9
Address mapping system.
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