CN107291640A - A kind of method and apparatus of the data transfer based on SAS technologies - Google Patents
A kind of method and apparatus of the data transfer based on SAS technologies Download PDFInfo
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- CN107291640A CN107291640A CN201710520465.3A CN201710520465A CN107291640A CN 107291640 A CN107291640 A CN 107291640A CN 201710520465 A CN201710520465 A CN 201710520465A CN 107291640 A CN107291640 A CN 107291640A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 21
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/14—Handling requests for interconnection or transfer
- G06F13/16—Handling requests for interconnection or transfer for access to memory bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0028—Serial attached SCSI [SAS]
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Abstract
The embodiment of the invention discloses a kind of method and apparatus of the data transfer based on SAS technologies, automatic triggering SAS Expander open multiplex function after system boot；After the data acquisition instruction of user's transmission is received, data acquisition instruction is sent to corresponding SATA hard disc.Include multiple communication links in SAS Expander, each SATA hard disc can realize the transmission of data by one of communication link, when each communication link included in the SAS Expander is taken by a corresponding SATA hard disc, then the target data sent two SATA hard discs passes through same communication link.It can be seen that, can be on the premise of storage system hardware not be changed by opening SAS Expander multiplex function, improve the utilization rate of communication link, the IO total bandwidths of one times of SATA hard disc are lifted, while storage device cost is not increased, make storage device performance double.
Description
Technical field
The present invention relates to technical field of memory, the method and dress of more particularly to a kind of data transfer based on SAS technologies
Put.
Background technology
The current serial SCSI in storage rear end (Serial Attached SCSI, SAS) interface rate has evolved to
12Gbps, and the current highest of serial ATA (Serail ATA, SATA) interface rate only has 6Gbps.It result in when storage system connects
When connecing SATA hard disc, it is impossible to which perfection plays 12Gbps bandwidth performance.Because transmission (the Input/ of each data
Output, IO) it is all based on a physical link.Although the link that SAS chips are provided is 12Gbps, SAS chips are arrived
Can only be with 6Gbps speed rates between SATA hard disc, therefore the speed of this section of link has become the short slab of data transfer.
It can be seen that, the speed of data transfer how is improved, is those skilled in the art's urgent problem to be solved.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of method and apparatus of the data transfer based on SAS technologies, Ke Yiti
The speed of high data transfer.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of the data transfer based on SAS technologies, bag
Include：
Trigger SAS Expander and open multiplex function；
The data acquisition instruction that user sends is received, and data acquisition instruction is sent to corresponding SATA hard disc；
When each communication link included in the SAS Expander is taken by a corresponding SATA hard disc,
The target data that then two SATA hard discs are sent passes through same communication link.
Optionally, in addition to：
Count the occupied situation of all communication links included in the SAS Expander；
When each communication link included in the SAS Expander is taken by corresponding two SATA hard discs,
Then stop sending the data acquisition instruction to the SATA hard disc.
Optionally, in addition to：
Judge the target data that the SATA hard disc is sent whether is received in preset time；
Instructed if it is not, then resending the data acquisition to the SATA hard disc.
Optionally, in addition to：
Count the number of times that the data acquisition instruction is sent to the SATA hard disc；
When the number of times exceedes predetermined threshold value, then stop sending the data acquisition instruction to the SATA hard disc.
The embodiment of the present invention additionally provides a kind of device of the data transfer based on SAS technologies, including opening unit, reception
Unit, transmitting element and combining unit,
The opening unit, multiplex function is opened for triggering SAS Expander；
The receiving unit, for receiving the data acquisition instruction of user's transmission, and triggers the transmitting element, the hair
Unit is sent, for data acquisition instruction to be sent to corresponding SATA hard disc；
The combining unit, for when each communication link included in the SAS Expander is by corresponding one
When individual SATA hard disc takes, then the target data sent two SATA hard discs passes through same communication link.
Optionally, in addition to statistic unit and stop element,
The statistic unit, for counting the occupied feelings of all communication links included in the SAS Expander
Condition；
The stop element, for when each communication link included in the SAS Expander is by corresponding two
When individual SATA hard disc takes, then stop sending the data acquisition instruction to the SATA hard disc.
Optionally, in addition to judging unit,
The judging unit, for judging the number of targets that the SATA hard disc is sent whether is received in preset time
According to；
If it is not, then triggering the transmitting element, resending the data acquisition to the SATA hard disc instructs.
Optionally, the statistic unit is additionally operable to time that statistics sends the data acquisition instruction to the SATA hard disc
Number；
When the number of times exceedes predetermined threshold value, then the stop element is triggered, stop sending described to the SATA hard disc
Data acquisition is instructed.
Automatic triggering SAS Expander open multiplexing work(after system boot it can be seen from above-mentioned technical proposal
Energy；After the data acquisition instruction of user's transmission is received, data acquisition instruction is sent to corresponding SATA hard disc.
Include multiple communication links in SAS Expander, each SATA hard disc can realize number by one of communication link
According to transmission, when each communication link included in the SAS Expander by a corresponding SATA hard disc take
When, then the target data sent two SATA hard discs passes through same communication link.It can be seen that, by opening SAS
Expander multiplex function, on the premise of storage system hardware is not changed, can improve the utilization rate of communication link,
The IO total bandwidths of one times of SATA hard disc are lifted, while storage device cost is not increased, make storage device performance double.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of system schematic of the data transfer based on SAS technologies provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the method for the data transfer based on SAS technologies provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of the device of the data transfer based on SAS technologies provided in an embodiment of the present invention.
Embodiment
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 clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are not under the premise of creative work is made, and what is obtained is every other
Embodiment, belongs to the scope of the present invention.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
In traditional approach, the data that a SATA hard disc is sent are passed by the data link in SAS Expander
It is defeated.But, a data link can reach 12Gbps, and the current highest of SATA interface speed only has 6Gbps, causes Data-Link
Road can not play 12Gbps broadband performance.
Therefore, the embodiments of the invention provide a kind of method and apparatus of the data transfer based on SAS technologies, by opening
SAS Expander multiplexing (Multiplexing) function, can be by the Data Integration of two SATA hard discs a to number
Transmitted according on link, so that the expense of SAS Expander links is saved, the performance for improving storage rear end IO at double.
Based on above-mentioned thought, the embodiment of the present invention mainly by channel card in SAS (Host Bridge Adapter,
HBA) and expansion card (SAS Expander) and SATA hard disc interact realization, its system schematic is as shown in figure 1, system is main
Transfer realization and the information exchange of SATA hard disc by HBA and SAS Expander.Wherein, HBA and SAS Expander
Between message transmission rate can reach 12Gbps, can include in a plurality of data link, Fig. 1 in SAS Expander
By taking a data link as an example, the speed highest of a SATA hard disc transmission data only has 6Gbps, therefore, it can two
SATA hard disc and a data link connection, realize the transmission of data.
Next, a kind of method for data transfer based on SAS technologies that the embodiment of the present invention is provided is discussed in detail.Figure
2 be a kind of flow chart of the method for the data transfer based on SAS technologies provided in an embodiment of the present invention, and this method includes：
S201：Trigger SAS Expander and open multiplex function.
SAS protocol supports multiplex function, can configure multiplex function in SAS Expander, specific real
, can be using system boot as the trigger condition for opening multiplex function, namely after system boot in existing, SAS Expander
The multiplex function of configuration can be automatically turned on.
In addition or user input specific instruction mode open SAS Expander multiplex functions,
When system does not receive the specific instruction of user's input, the multiplex function in SAS Expander is closed；
When needing to utilize the multiplex function in SAS Expander, user just can input specific finger in system related interfaces
Order, after system receives the specific instruction of user's input, just can trigger the SAS Expander and open multiplex function.
S202：The data acquisition instruction that user sends is received, and data acquisition instruction is sent to corresponding SATA
Hard disk.
System is received after the data acquisition instruction of user's transmission, just can be by HBA and SAS Expander transfer
Data acquisition instruction is sent to specified SATA hard disc, SATA hard disc is according to the instruction, by SAS Expander
Data link sends target data to system.
System can be connected with multiple SATA hard discs, for the ease of distinguishing different SATA hard discs, in the embodiment of the present invention
In, corresponding number value can be set to each SATA hard disc, can be carried in the data acquisition instruction that user sends corresponding
Number value, in order to which system can recognize the data for needing to obtain which or which SATA hard disc.
S203：When each communication link included in the SAS Expander is accounted for by a corresponding SATA hard disc
Used time, the then target data sent two SATA hard discs passes through same communication link.
SAS Expander are opened after multiplex function, can be with a data chain in the case where data link is sufficient
Road is used for the target data for transmitting a SATA hard disc；After every data link has its corresponding SATA hard disc, such as
The data that fruit has new SATA hard disc need transmission, then can be from only to choosing it in should having the data link of a SATA hard disc
In a data link, to transmit the data of new SATA hard disc, now the data link can be used for simultaneous transmission two
The data of SATA hard disc.
For example, include 4 data links in SAS Expander, respectively 1-4, have 4 SATA hard discs need to
System transmits data, then each SATA hard disc can correspond to 1 data link, to realize the transmission of data, when there is the 5th SATA
When hard disk is needed to system transmission data, then a data link can be chosen from this 4 data link as chosen the 1st article of number
The data of the 5th SATA hard disc are transmitted according to link；When there is the 6th SATA hard disc to need to transmit data to system again, then may be used
With from remaining 3 data link be 2-4 in choose a data link and transmit the 6th as chosen the 2nd data link
The data of SATA hard disc, the like, so as to realize the multiplex function of data link in SAS Expander.
Automatic triggering SAS Expander open multiplexing work(after system boot it can be seen from above-mentioned technical proposal
Energy；After the data acquisition instruction of user's transmission is received, data acquisition instruction is sent to corresponding SATA hard disc.
Include multiple communication links in SAS Expander, each SATA hard disc can realize number by one of communication link
According to transmission, when each communication link included in the SAS Expander by a corresponding SATA hard disc take
When, then the target data sent two SATA hard discs passes through same communication link.It can be seen that, by opening SAS
Expander multiplex function, on the premise of storage system hardware is not changed, can improve the utilization rate of communication link,
The IO total bandwidths of one times of SATA hard disc are lifted, while storage device cost is not increased, make storage device performance double.
The communication link that SAS Expander are included is limited, when all communication links are taken by two SATA hard discs
When, now, if when there is new SATA hard disc to transmit data, needing after waiting communication link idle, just still transmitting new number
According in order to reduce the stand-by period of data transfer, all communication link quilts included in the SAS Expander can be counted
The situation of occupancy；When each communication link included in the SAS Expander is taken by corresponding two SATA hard discs
When, then stop sending the data acquisition instruction to the SATA hard disc.
By counting the occupancy situation of all communication links in SAS Expander, more reasonably SATA can be arranged hard
Disk transmits the stand-by period of data, effectively reduction data transfer.
In view of being influenceed by external factor such as networks, it can occur that system can not receive SATA hard disc transmission
Data, for this kind of situation, specifically, may determine that the target that the SATA hard disc is sent whether is received in preset time
Data；Instructed if it is not, then resending the data acquisition to the SATA hard disc.
The time that preset time is spent when can be according to data transfer determines.
In the specific implementation, timing being sent since system to SATA hard disc when data acquisition is instructed, is somebody's turn to do when reaching
It is still the target data for receiving SATA hard disc transmission after preset time, then can send data acquisition to SATA hard disc again refers to
Order.
By way of resending data acquisition instruction, it is possible to prevente effectively from because extraneous factor influence, causes data
The situation of bust this occurs, it is ensured that effective progress of data transfer.
For the situation of the bust this, it is also possible to be due to that the damage of hardware leads to not normal transmission data, this
When, no matter system resends the instruction of how many times data acquisition to SATA hard disc, it is also possible to can not receive target data, in order to
Avoid system from performing idle work, the data acquisition instruction is being sent in the specific implementation, can count to the SATA hard disc
Number of times；When the number of times exceedes predetermined threshold value, then stop sending the data acquisition instruction to the SATA hard disc.
Predetermined threshold value can be that system sends the higher limit that data acquisition instructs number of times.Its specific value can be according to reality
Situation is set, and is not limited herein.
When the number of times that system sends same data acquisition instruction exceedes predetermined threshold value, then explanation can be able to be because hard
The damage of part causes the failure of data transfer, and now system resends data acquisition instruction and had little significance again, so, can
Stop sending data acquisition instruction to SATA hard disc with control system.
It should be noted that being directed to different SATA hard discs, the data acquisition instruction that system is sent can also have differences.
Statistics sends the number of times of data acquisition instruction, is to be directed to the data acquisition instruction sent to same SATA hard disc.
Fig. 3 is a kind of structural representation of the device of the data transfer based on SAS technologies provided in an embodiment of the present invention, bag
Opening unit 31, receiving unit 32, transmitting element 33 and combining unit 34 are included,
The opening unit 31, multiplex function is opened for triggering SAS Expander；
The receiving unit 32, for receiving the data acquisition instruction of user's transmission, and triggers the transmitting element 33, institute
Transmitting element 33 is stated, for data acquisition instruction to be sent to corresponding SATA hard disc；
The combining unit 34, for when each communication link included in the SAS Expander it is corresponding
When one SATA hard disc takes, then the target data sent two SATA hard discs passes through same communication link.
Optionally, in addition to statistic unit and stop element,
The statistic unit, for counting the occupied feelings of all communication links included in the SAS Expander
Condition；
The stop element, for when each communication link included in the SAS Expander is by corresponding two
When individual SATA hard disc takes, then stop sending the data acquisition instruction to the SATA hard disc.
Optionally, in addition to judging unit,
The judging unit, for judging the number of targets that the SATA hard disc is sent whether is received in preset time
According to；
If it is not, then triggering the transmitting element, resending the data acquisition to the SATA hard disc instructs.
Optionally, the statistic unit is additionally operable to time that statistics sends the data acquisition instruction to the SATA hard disc
Number；
When the number of times exceedes predetermined threshold value, then the stop element is triggered, stop sending described to the SATA hard disc
Data acquisition is instructed.
The explanation of feature may refer to the related description of embodiment corresponding to Fig. 2 in embodiment corresponding to Fig. 3, here no longer
Repeat one by one.
Automatic triggering SAS Expander open multiplexing work(after system boot it can be seen from above-mentioned technical proposal
Energy；After the data acquisition instruction of user's transmission is received, data acquisition instruction is sent to corresponding SATA hard disc.
Include multiple communication links in SAS Expander, each SATA hard disc can realize number by one of communication link
According to transmission, when each communication link included in the SAS Expander by a corresponding SATA hard disc take
When, then the target data sent two SATA hard discs passes through same communication link.It can be seen that, by opening SAS
Expander multiplex function, on the premise of storage system hardware is not changed, can improve the utilization rate of communication link,
The IO total bandwidths of one times of SATA hard disc are lifted, while storage device cost is not increased, make storage device performance double.
A kind of method and apparatus of the data transfer based on SAS technologies provided above the embodiment of the present invention is carried out
It is discussed in detail.The embodiment of each in specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention,
Some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the protection domain of the claims in the present invention
It is interior.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, generally describes the composition and step of each example according to function in the above description.These
Function is performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Specialty
Technical staff can realize described function to each specific application using distinct methods, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of the method or algorithm that the embodiments described herein is described with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Claims (8)
1. a kind of method of the data transfer based on SAS technologies, it is characterised in that including：
Trigger SAS Expander and open multiplex function；
The data acquisition instruction that user sends is received, and data acquisition instruction is sent to corresponding SATA hard disc；
When each communication link included in the SAS Expander is taken by a corresponding SATA hard disc, then will
The target data that two SATA hard discs are sent passes through same communication link.
2. according to the method described in claim 1, it is characterised in that also include：
Count the occupied situation of all communication links included in the SAS Expander；
When each communication link included in the SAS Expander is taken by corresponding two SATA hard discs, then stop
Only the data acquisition is sent to the SATA hard disc to instruct.
3. method according to claim 2, it is characterised in that also include：
Judge the target data that the SATA hard disc is sent whether is received in preset time；
Instructed if it is not, then resending the data acquisition to the SATA hard disc.
4. method according to claim 3, it is characterised in that also include：
Count the number of times that the data acquisition instruction is sent to the SATA hard disc；
When the number of times exceedes predetermined threshold value, then stop sending the data acquisition instruction to the SATA hard disc.
5. a kind of device of the data transfer based on SAS technologies, it is characterised in that including opening unit, receiving unit, send single
Member and combining unit,
The opening unit, multiplex function is opened for triggering SAS Expander；
The receiving unit, for receiving the data acquisition instruction of user's transmission, and triggers the transmitting element, the transmission list
Member, for data acquisition instruction to be sent to corresponding SATA hard disc；
The combining unit, for when each communication link included in the SAS Expander is by corresponding one
When SATA hard disc takes, then the target data sent two SATA hard discs passes through same communication link.
6. device according to claim 5, it is characterised in that also including statistic unit and stop element,
The statistic unit, for counting the occupied situation of all communication links included in the SAS Expander；
The stop element, for when each communication link included in the SAS Expander is by corresponding two
When SATA hard disc takes, then stop sending the data acquisition instruction to the SATA hard disc.
7. device according to claim 6, it is characterised in that also including judging unit,
The judging unit, for judging the target data that the SATA hard disc is sent whether is received in preset time；
If it is not, then triggering the transmitting element, resending the data acquisition to the SATA hard disc instructs.
8. device according to claim 7, it is characterised in that the statistic unit is additionally operable to statistics to the SATA hard disc
Send the number of times of the data acquisition instruction；
When the number of times exceedes predetermined threshold value, then the stop element is triggered, stop sending the data to the SATA hard disc
Obtain instruction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710520465.3A CN107291640B (en) | 2017-06-30 | 2017-06-30 | Data transmission method and device based on SAS technology |
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| CN201710520465.3A CN107291640B (en) | 2017-06-30 | 2017-06-30 | Data transmission method and device based on SAS technology |
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| CN1971497A (en) * | 2005-11-23 | 2007-05-30 | 普安科技股份有限公司 | Storage virtualization subsystem and system with host-side redundancy via sas connectivity |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107291640B (en) | 2021-01-12 |
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