CN106293520B - A kind of processing method of I/O request - Google Patents
A kind of processing method of I/O request Download PDFInfo
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- CN106293520B CN106293520B CN201610619194.2A CN201610619194A CN106293520B CN 106293520 B CN106293520 B CN 106293520B CN 201610619194 A CN201610619194 A CN 201610619194A CN 106293520 B CN106293520 B CN 106293520B
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- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 80
- 230000004044 response Effects 0.000 claims abstract description 15
- 238000010367 cloning Methods 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0631—Configuration or reconfiguration of storage systems by allocating resources to storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a kind of processing methods of I/O request, this method comprises: when host side issues IO write request data to local controller, upper layer cache module in local controller receives the IO write request data, and will carry out data backup on the I/O request data image to companion's partner side controller；The partner side controller sends feedback information to the local controller, and IO write request data described in local controller is notified successfully to back up；The local controller returns to the response message for indicating that I O process is completed to host side；The IO write request data are written in memory the local controller.This method, which is realized, reduces IO delay.
Description
Technical field
The present invention relates to storage system caching technology fields, more particularly to a kind of processing method of I/O request.
Background technique
Currently, within the storage system, snapshot, remote copy, from advanced features such as simplification volumes is high-end storage series at clone
Essential advanced feature in product, these advanced features need to accelerate by caching to the process of I O process, but store system
In system, as soon as only existing a cache layer, the performance of storage system will affect to a certain extent.Under normal circumstances, storage system
In only one layer caching, and snapshot, clone, remote copy, from the advanced features such as simplification volume need caching accelerate, otherwise
Performance degradation is caused, the I/O request that host side issues just needs just be issued to after the treatment process of above-mentioned advanced feature
In caching, i.e., the I/O request that host side issues needs to flow into after these advanced features, can just be eventually written caching, host
The response time of IO write request will receive the influence of advanced feature treatment process, certainly will will cause host IO delay long-tail in this way,
Extend overlong time.
Summary of the invention
The object of the present invention is to provide a kind of processing methods of I/O request, reduce IO delay to realize.
In order to solve the above technical problems, the present invention provides a kind of processing method of I/O request, comprising:
When host side issues IO write request data to local controller, the upper layer cache module in local controller is received
The IO write request data, and data backup will be carried out on the I/O request data image to companion's partner side controller；
The partner side controller sends feedback information to the local controller, notifies IO described in local controller
Write request data successfully back up；
The local controller returns to the response message for indicating that I O process is completed to host side；
The IO write request data are written in memory the local controller.
Preferably, the local controller includes upper layer cache module, advanced feature module and lower layer's cache module, described
Advanced feature module is between the upper layer cache module and lower layer's cache module.
Preferably, the advanced feature module includes: snapshot module, cloning module, remote copy module or simplifies certainly
Module.
Preferably, the IO write request data are written in memory the local controller, comprising:
The IO write request data are transmitted to advanced in local controller by the upper layer cache module in local controller
Personality modnies；
Advanced feature module in local controller handles the IO write request data, will be described after the completion of processing
IO write request data are transferred to lower layer's cache module in local controller, are written in lower layer's cache module.
Preferably, it is connected between the local controller and the partner side controller by the channel NTB.
Preferably, upper layer cache module in the local controller receives the IO write request data, and by the IO
Request data is mirrored on companion's partner side controller and carries out data backup, comprising:
Upper layer cache module in the local controller receives the IO write request data, and by the I/O request data
Data backup is carried out on the upper layer cache module being mirrored in companion's partner side controller.
Preferably, the partner side controller sends feedback information to the local controller, comprising:
Upper layer cache module hair of the upper layer cache module into the local controller in the partner side controller
Send feedback information.
Preferably, the method also includes:
When delay machine event occurs in local controller, local controller returns to the response letter for indicating that I O process is completed to host side
Breath, the advanced feature module IO write request data being transferred in local controller.
A kind of processing method of I/O request provided by the present invention is controlled when host side issues IO write request data to local terminal
When device, the upper layer cache module in local controller receives the IO write request data, and the I/O request data image is arrived
Data backup is carried out on companion's partner side controller；The partner side controller is sent to the local controller to be fed back
Information notifies IO write request data described in local controller successfully to back up；The local controller is returned to host side and is indicated
The response message that I O process is completed；The IO write request data are written in memory the local controller.As it can be seen that this method is drawn
The double-deck caching is entered, after system receives the I/O request i.e. IO write request data of host side, IO write request data are initially entered
I.e. upper layer cache module is cached to upper layer, upper layer cache module receives IO write request data image to the end partner
The response message for indicating that I O process is completed will be returned to host side after the feedback information at the end partner, in this way informing host side
The duplication that I O process completes i.e. IO write request data is completed, and is so allowed IO write request data to be directly entered upper layer caching and is just completed IO
Processing is completed, and is completed in time to host feedback I O process, can be masked the I O process process of advanced feature, acceleration system
Can, the delay of the host IO as caused by the I O process process of advanced feature can be masked by upper layer caching in this way, so should
Method, which is realized, reduces IO delay, acceleration system performance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of the processing method of I/O request provided by the present invention；
Fig. 2 is the structural schematic diagram of local controller and partner side controller；
Fig. 3 is IO stream process schematic diagram.
Specific embodiment
Core of the invention is to provide a kind of processing method of I/O request, reduces IO delay to realize.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of flow chart of the processing method of I/O request provided by the present invention, this includes:
S11: the upper layer cache module when host side issues IO write request data to local controller, in local controller
IO write request data are received, and data backup will be carried out on I/O request data image to companion's partner side controller；
S12:partner side controller sends feedback information to local controller, notifies local controller IO write request number
According to successfully backing up；
S13: local controller returns to the response message for indicating that I O process is completed to host side；
S14: IO write request data are written in memory local controller.
As it can be seen that this method introduces the double-deck caching, after system receives the I/O request i.e. IO write request data of host side,
IO write request data are first into upper layer i.e. upper layer cache module, the upper layer cache module of caching and arrive IO write request data image
The end partner will return to the response message for indicating that I O process is completed to host side after receiving the feedback information at the end partner,
Informing that host side I O process is completed in this way is that the duplication of IO write request data is completed, and IO write request data is so allowed to be directly entered
Layer caching is just completed I O process and is completed, and completes in time to host feedback I O process, can mask the I O process mistake of advanced feature
Journey, acceleration system performance can mask the host as caused by the I O process process of advanced feature by upper layer caching in this way
IO delay, realize reduces IO delay, acceleration system performance in this way.
Based on the above method, specifically, local controller includes upper layer cache module, advanced feature module and lower layer's caching
Module, advanced feature module is between upper layer cache module and lower layer's cache module.
Double-deck i.e. upper layer cache module and lower layer's cache module, the caching, that is, upper layer cache module on upper layer of caching is introduced to exist
After receiving IO write request, it can be mirrored to the end partner, that is, copy backup is to partner side controller, subsequent meeting
It is completed to host side feedback I O process, then in the data handling procedure for carrying out above-mentioned advanced feature, these height can be masked
System delay caused by level characteristics.This method breaks the implementation method of conventional monolayers caching, introduces bilayer within the storage system
Caching can mask the delay of the host IO as caused by the data handling procedure of advanced feature by upper layer caching.This method
Applied in storage system, applying in the multichannels storage systems such as 2 tunnels, 4 tunnels, 8 tunnels, it can be effectively reduced system IO delay, mention
System performance is risen, is guaranteed data security simultaneously.
Specifically, advanced feature module includes: snapshot module, cloning module, remote copy module or simplifies module certainly.
Wherein, it is connected between local controller and partner side controller by the channel NTB.
Step S14 preferably uses following steps to realize:
S21: IO write request data are transmitted to advanced in local controller by the upper layer cache module in local controller
Personality modnies；
S22: the advanced feature module in local controller handles IO write request data, writes IO after the completion of processing
Request data is transferred to lower layer's cache module in local controller, is written in lower layer's cache module.
In step S11, upper layer cache module in local controller receives IO write request data, and by I/O request data mirror
As the process to progress data backup on companion's partner side controller specifically: the upper layer cache module in local controller
IO write request data are received, and I/O request data image is enterprising to the upper layer cache module in companion's partner side controller
Row data backup.
In step S12, partner side controller sends the process of feedback information to local controller specifically: partner
Upper layer cache module of the upper layer cache module into local controller in side controller sends feedback information.
Wherein, partner side controller also includes upper layer cache module, advanced feature module and lower layer's cache module, height
Level characteristics module is between upper layer cache module and cache module.
Further, when delay machine event occurs in local controller, local controller is returned to host side indicates that I O process is complete
At response message, advanced feature module IO write request data being transferred in local controller.
Method introduces bilayers to cache, and after system receives the I/O request of host side, is first into upper layer caching,
After I/O data is mirrored to the end partner by upper layer caching, I O process will be returned to host side and completed, it will be able to masked advanced
The I O process process of characteristic, acceleration system performance.Upper layer is buffered in receive host IO write request after, transmitted by IO write request
Before being handled to above-mentioned advanced feature module, by IO write request data image to the end partner, successively guarantee data peace
Entirely, it is then informed about the completion of host side I O process, to shield the I O process delay of above-mentioned advanced feature, acceleration system
Energy.Shielding snapshot, clone, remote copy and these advanced specific I O process delays from simplification volume are cached by upper layer, are realized
System performance is promoted.
As shown in Fig. 2, in storage system each controller include two layers of cache module, snapshot, clone, remote copy and from
It the advanced features such as simplifies to be located between two layers of caching.Local controller includes upper layer cache module, advanced feature module and lower layer
Cache module, advanced feature module is between upper layer cache module and cache module.Partner side controller also includes upper layer
Cache module, advanced feature module and lower layer's cache module, advanced feature module be located at upper layer cache module and cache module it
Between.
As shown in figure 3, the step of S1-S6 numeral mark expression IO stream in figure flows to, that is, IO write request data
Flow to process, what IO write request data were marked since S1 flows to step, successively by S2, S3, S4, S5, S6 these label
Flow direction, snapshot/clone/remote copy in figure/from simplification volume module indicate snapshot module, cloning module, remote copy mould
Block simplifies module certainly, these modules are all advanced feature modules, has snapshot module, cloning module, remote copy module
Or these advanced features are simplified certainly.Specifically, S1 process is that host side issues IO write request data into local controller
Upper layer cache module, S2 process are upper layer cache module I/O request data images in local controller to the end companion partner
Data backup is carried out on upper layer cache module in controller, S3 process is the upper layer cache module in partner side controller
Upper layer cache module into local controller sends feedback information to notify that it is standby that local controller IO write request data have succeeded
Part, S4 process is that the upper layer cache module in local controller returns to the response message for indicating that I O process is completed, S5 to host side
Process be upper layer cache module in local controller IO write request data are transferred in local controller snapshot/clone/
Remote copy/from simplification volume module, S6 process are snapshot/clone/remote copies in local controller/will from simplification volume module
IO write request data are transferred to lower layer's cache module in local controller.
In Fig. 3, by the process of S1 to S6, when host side issues IO write request to local terminal, upper layer cache module is received
IO write request, and by the channel NTB between controller, it is standby by data are carried out on the controller of data image to the end partner
Part, subsequent partner side controller can notify Local Data successfully to back up to local terminal feedback information, and then local terminal controls
IO write request data can be written in memory by device.If after this, there is delay machine event in local controller, these IO numbers
According to will not lose, so safety when thinking the IO write request data that host side issues at this time, so can be returned to host side
I O process is completed.The subsequent IO can just be submitted to snapshot, clone, remote copy or simplify these advanced feature moulds of module certainly
Block carries out subsequent processing.Do so the delay that can also mask in these advanced feature data handling procedures.
The drawbacks of conventional monolayers cache module is: the response time of host IO write request will receive advanced feature treatment process
Influence, and this method masks, and snapshot, clone, remote copy and simplifies these advanced features certainly to host IO write request
Delay, after IO write request data are written to memory by upper layer cache module, advanced feature module can be with base to the treatment process of IO
It is carried out in pointer, can also accelerate the efficiency of processing.
To sum up, the processing method of a kind of I/O request provided by the present invention, when host side issues IO write request data to originally
When side controller, the upper layer cache module in local controller receives IO write request data, and by I/O request data image to together
Data backup is carried out on companion's partner side controller；Partner side controller sends feedback information, notice to local controller
Local controller IO write request data successfully back up；Local controller returns to the response letter for indicating that I O process is completed to host side
Breath；IO write request data are written in memory local controller.As it can be seen that this method introduces the double-deck caching, when system receives
After the I/O request of host side, that is, IO write request data, IO write request data are first into upper layer caching i.e. upper layer cache module,
For upper layer cache module by IO write request data image to the end partner, receiving will be to host after the feedback information at the end partner
The duplication that the response message that end return expression I O process is completed, in this way informing host side I O process complete i.e. IO write request data is complete
At, it so allows IO write request data to be directly entered upper layer caching and just completes I O process completion, it is complete to host feedback I O process in time
At, can mask the I O process process of advanced feature, acceleration system performance, in this way by upper layer caching can mask due to
The delay of host IO caused by the I O process process of advanced feature, realize reduces IO delay, acceleration system performance in this way.
A kind of processing method of I/O request provided by the present invention is described in detail above.Tool used herein
Principle and implementation of the present invention are described for body example, the above embodiments are only used to help understand this hair
Bright method and its core concept.It should be pointed out that for those skilled in the art, not departing from the present invention
, can be with several improvements and modifications are made to the present invention under the premise of principle, these improvement and modification also fall into right of the present invention
It is required that protection scope in.
Claims (6)
1. a kind of processing method of I/O request characterized by comprising
When host side issues IO write request data to local controller, described in the upper layer cache module in local controller receives
IO write request data, and data backup will be carried out on the I/O request data image to companion's partner side controller；
The partner side controller sends feedback information to the local controller, notifies IO described in local controller writes to ask
Data are asked successfully to back up；
The local controller returns to the response message for indicating that I O process is completed to host side；
The IO write request data are written in memory the local controller；
The local controller includes upper layer cache module, advanced feature module and lower layer's cache module, the advanced feature mould
Block is between the upper layer cache module and lower layer's cache module；
The advanced feature module includes: snapshot module, cloning module, remote copy module or simplifies module certainly.
2. the method as described in claim 1, which is characterized in that the local controller will be in IO write request data write-in
In depositing, comprising:
The IO write request data are transmitted to the advanced feature in local controller by the upper layer cache module in local controller
Module；
Advanced feature module in local controller handles the IO write request data, writes the IO after the completion of processing
Request data is transferred to lower layer's cache module in local controller, is written in lower layer's cache module.
3. the method as described in claim 1, which is characterized in that the local controller and the partner side controller it
Between connected by the channel NTB.
4. the method as described in claim 1, which is characterized in that described in the upper layer cache module in the local controller receives
IO write request data, and data backup will be carried out on the I/O request data image to companion's partner side controller, comprising:
Upper layer cache module in the local controller receives the IO write request data, and by the I/O request data image
Data backup is carried out on to the upper layer cache module in companion's partner side controller.
5. method as claimed in claim 4, which is characterized in that the partner side controller is sent out to the local controller
Send feedback information, comprising:
Upper layer cache module of the upper layer cache module into the local controller in the partner side controller sends anti-
Feedforward information.
6. the method as described in any one of claim 1 to 5, which is characterized in that further include:
When delay machine event occurs in local controller, local controller returns to the response message for indicating that I O process is completed to host side,
The advanced feature module IO write request data being transferred in local controller.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107797945A (en) * | 2017-10-31 | 2018-03-13 | 郑州云海信息技术有限公司 | A kind of storage system and its date storage method, device, system and equipment |
| CN109213631A (en) * | 2018-08-22 | 2019-01-15 | 郑州云海信息技术有限公司 | A kind of transaction methods, device, equipment and readable storage medium storing program for executing |
| CN110780816B (en) * | 2019-10-17 | 2023-01-10 | 苏州浪潮智能科技有限公司 | Data synchronization method, device and medium |
| CN115422207B (en) * | 2022-11-02 | 2023-03-24 | 苏州浪潮智能科技有限公司 | Method, device, equipment and medium for reducing transmission quantity of mirror image data by double-layer cache |
| CN116107516B (en) * | 2023-04-10 | 2023-07-11 | 苏州浪潮智能科技有限公司 | Data writing method and device, solid state disk, electronic equipment and storage medium |
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