CN108345515A - Storage method and device and its storage system - Google Patents
Storage method and device and its storage system Download PDFInfo
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- CN108345515A CN108345515A CN201710046893.7A CN201710046893A CN108345515A CN 108345515 A CN108345515 A CN 108345515A CN 201710046893 A CN201710046893 A CN 201710046893A CN 108345515 A CN108345515 A CN 108345515A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1479—Generic software techniques for error detection or fault masking
- G06F11/1482—Generic software techniques for error detection or fault masking by means of middleware or OS functionality
- G06F11/1484—Generic software techniques for error detection or fault masking by means of middleware or OS functionality involving virtual machines
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Abstract
The present invention provides a kind of storage method and device and its storage systems.This method includes：The first virtual memory cell is created, the first virtual memory cell is corresponding with the first storage unit in the first storage device；The second virtual memory cell is created, the second virtual memory cell is corresponding with the second storage unit in the second storage device；And corresponding first storage unit or the second storage unit are accessed by the first virtual memory cell or the second virtual memory cell, wherein the first virtual memory cell and the second virtual memory cell memory cell identification having the same.The storage method can be realized stores data dual-active and the technique effect of zero switching time based entirely on the bottom of storage device.
Description
Technical field
The present invention relates to field of storage, relate more specifically to storage method and device and its storage system.
Background technology
Disaster tolerance system refers to that two sets or the identical IT system of more set functions are established in place at two, can be carried out from each other
State of health monitoring and function switch, when system is stopped because of unexpected (such as fire, earthquake) at one, entire application system
Another place can be switched to so that the system function can continue to work normally.Traditional disaster tolerance system framework uses a main number
According to the pattern at center and a Backup Data center, wherein primary data center is responsible for the data production and consumption under normal conditions,
The data of primary data center are backed up at Backup Data center.When disaster or failure occurs, data production and consumption is cut
Change to Backup Data center.
However, disaster is a small probability event, using a traditional master one for mode, Backup Data center is only in disaster
It can just be played a role when generation, this is the waste of IT resources and fund for enterprise customer.And after disaster occurs, industry
Business needs the regular hour that can just be switched to Backup Data center.
Invention content
The present invention provides novel storage method and device and its storage systems.
Storage method according to the ... of the embodiment of the present invention, including：Create the first virtual memory cell, the first virtual memory cell
It is corresponding with the first storage unit in the first storage device；Create the second virtual memory cell, the second virtual memory cell with
The second storage unit in second storage device is corresponding；And pass through the first virtual memory cell or the second virtual memory cell
Corresponding first storage unit or the second storage unit are accessed, wherein the first virtual memory cell and the second virtual memory cell have
There is identical memory cell identification.
Storage device according to the ... of the embodiment of the present invention, including：First creation module is configured as creating the first virtual memory
Unit, the first virtual memory cell are corresponding with the first storage unit in the first storage device；Second creation module, is configured
To create the second virtual memory cell, the second virtual memory cell is corresponding with the second storage unit in the second storage device；
And access modules, it is configured as accessing corresponding first storage by the first virtual memory cell or the second virtual memory cell
Unit or the second storage unit, wherein the first virtual memory cell and the second virtual memory cell storage unit mark having the same
Know.
Storage system according to the ... of the embodiment of the present invention, including the first storage device and the second storage device, each storage are set
Standby includes storage unit and virtual memory cell corresponding with the storage unit, wherein the storage list in each storage device
Member is accessed by virtual memory cell corresponding with the storage unit；And wherein, in the first storage device
Virtual memory cell and the second storage device in virtual memory cell memory cell identification having the same so that
The host that the virtual memory cell of one storage device and the virtual memory cell of the second storage device are issued access request is considered as
Same virtual memory cell.
Description of the drawings
By reading referring to the drawings to being described in detail made by non-limiting embodiment, other feature of the invention,
Objects and advantages will become more apparent upon, wherein same or analogous reference numeral indicates same or analogous feature.
Fig. 1 (a)-Fig. 1 (c) shows the schematic diagram of general data disaster tolerance processing procedure；
Fig. 2 is the exemplary architecture schematic diagram shown by virtualizing the dual-active data center initiative that gateway is realized；
Fig. 3 is the example flow diagram of storage method according to the ... of the embodiment of the present invention；
Fig. 4 is to show the exemplary diagram of the specific implementation of method shown in Fig. 3；
Fig. 5 is a kind of example flow diagram specifically handled of step S306 shown in Fig. 3；
Fig. 6 (a)-Fig. 6 (c) shows showing for the read-write operation between storage device according to the ... of the embodiment of the present invention and host
Example flow chart；
Fig. 7 is the schematic diagram of processing of the storage method according to the ... of the embodiment of the present invention when a storage device breaks down
Show；
Fig. 8 is the example illustration of storage device according to the ... of the embodiment of the present invention；And
Fig. 9 is to show can to realize depositing in storage method according to the ... of the embodiment of the present invention and its device or storage system
Store up the structure chart of the exemplary hardware architecture of the computing device of equipment.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.In the figure in order to clear
It is clear, it may be exaggerated the thickness of region and layer.Identical reference numeral indicates same or similar structure in figure, thus will save
Slightly their detailed description.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to fully understand the embodiment of the present invention to provide.However,
It will be appreciated by persons skilled in the art that technical scheme of the present invention can be put into practice without one in the specific detail or more
It is more, or other methods, constituent element, material may be used etc..In other cases, be not shown in detail or describe known features,
Material or operation to avoid the fuzzy present invention major technique intention.
Fig. 1 (a)-Fig. 1 (c) shows the schematic diagram of general data disaster tolerance processing procedure.Fig. 1
(a) show that the storage of general data disaster tolerance synchronizes reproduction process, as shown in Fig. 1 (a), host is first to primary storage
Send write request；Primary storage receives after write request is written data and the data backed up in synchronization of write-in to spare in master file
Standby volume in storage；After remote synchronization completion, primary storage writes complete message to host transmission, and terminates whole process.Fig. 1
(b) the storage asynchronous replication process for showing general data disaster tolerance, as shown in Fig. 1 (b), host is write to primary storage transmission ask first
It asks；Primary storage, which receives after write request that data to be written in master file and write complete to host return, to disappear
Breath；Hereafter then the standby volume in the data async backup to slack storage of write-in is confirmed remote backup by primary storage
It completes, to terminate whole process.Fig. 1 (c) shows the data read process of general data disaster tolerance, should as shown in Fig. 1 (c)
Process occurs only between primary storage and host, and host sends read request to primary storage, and primary storage is run through to host transmission
At message.
From the foregoing, it will be observed that in general data disaster tolerance processing procedure, the data write request of host is initiated to primary storage,
And data simultaneously operating is initiated from primary storage to slack storage, and when slack storage data are in synchronous phase, host can not be straight
It connects to it and initiates data read-write operation.When host initiates data read operation, data can only be read from primary storage.Work as main memory
When storage can not provide data IO (input and output) requests for some reason, it is switched to slack storage and needs interrupting service.
Compared with general data disaster tolerance processing scheme, the characteristics of dual-active data center initiative, is Liang Ge data centers (example
Such as, primary data center and disaster-tolerant backup data center) all it is on-line operation.If any one data center therein stops fortune
Row, another data center are still able to normal operation, and business is not interrupted, and the out of service of center carrys out user
Say it is non, business is barely affected.Fig. 2 is to show the dual-active data center side realized by virtualizing gateway
The exemplary architecture schematic diagram of case.As shown in Figure 2, the virtualization gateway in primary data center and disaster-tolerant backup data center connects respectively
Manage the storage of respective data center.Host, which accesses storage, to be divided by virtual gateway
Match, is replicated between primary storage and standby storage and data interaction is carried out by virtual gateway.From figure 2 it can be seen that this
Kind mode needs additional equipment (virtualization gateway) to take over, and virtualization gateway is such dual-active data center initiative
Performance bottleneck and maximum fault point.For example, if when virtualization gateway device failure or other reasons can not access, host is not
But primary data center can not be accessed, and disaster-tolerant backup data center can not be accessed.
In view of various deficiencies above-mentioned, the present invention provides a kind of novel storage method, storage device and storages
System realizes that the bottom based entirely on storage device stores data dual-active and zero switching by storage unit virtualization technology
The technique effect of time.
Fig. 3 shows the example flow diagram of storage method according to the ... of the embodiment of the present invention.As shown in figure 3, this method 300 is wrapped
It includes：S302 creates the first virtual memory cell, the first virtual memory cell and the first storage unit phase in the first storage device
It is corresponding；S304 creates the second virtual memory cell, the second storage unit in the second virtual memory cell and the second storage device
It is corresponding；And S306, corresponding first storage unit is accessed by the first virtual memory cell or the second virtual memory cell
Or second storage unit, the first virtual memory cell and the second virtual memory cell memory cell identification having the same.
In one embodiment, the first virtual memory cell can be created in the first storage device, and second is virtual
Storage unit can be created in the second storage device.In another embodiment, the first storage device can be main storage device,
And the second storage device can be spare storage device.In another embodiment, memory cell identification may include sequence number (SN)
With logical unit number (Logic Unit Number, referred to as LUN).
In some embodiments, the storage method in Fig. 3 is formed by first storage device and the second storage device
The controller level of storage system realize, to the access to the storage data of the first storage device and the second storage device
It is managed collectively and is configured.In further embodiments, storage method shown in Fig. 3 can be in the first storage device and
It is locally realized in two storage devices.That is, the first storage device and the second storage device are respectively created and storage therein
Corresponding first virtual memory cell of unit (for example, LUN or physical disk) and the second virtual memory cell.The present invention is not
Any restrictions are carried out to the specific implementation of storage method, it may occur to persons skilled in the art that any other mode realizes this
The recorded storage method of invention.
In addition, it should be recognized by those skilled in the art that although method 300, which describes, creates the first and second virtual memories
Unit, but method 300 may also include the other virtual memory cells of similarly establishment, the present invention is not to the dummy unit of establishment
Number or the number of storage device or storage unit carry out any restriction.
Fig. 4 shows the exemplary diagram of the specific implementation of method shown in Fig. 3.As shown in figure 4, SN is the first of 12345
It can be respectively included with LUN 00 in the second storage device that storage device and SN are 23456:01 the first storage unit and tool
There is LUN 00:02 the second storage unit.First storage device and the second storage device can common virtual to go out a SN be 34567
Virtual memory facilities.LUN ID are 00:01 come from physical store 12345 and LUN ID is 00:02 come from physical store
23456 LUN, it is 00 that LUN ID can be virtual as in virtual memory 34567:00 LUN.It is recognized in this way in host side
LUN from this 2 physical stores is considered the LUN from storage 34567.
In some embodiments, the first virtual memory cell corresponding with the first storage unit can be fictionalized and deposited with second
Corresponding second virtual memory cell of storage unit, the two memory cell identification having the same, i.e. SN 34567 and LUN 00:
00。
Fig. 5 is a kind of example flow diagram specifically handled of step S306 shown in Fig. 3.As shown in figure 4, step S306
May include：S3062 receives the access request for the virtual memory cell with the memory cell identification；S3064 will be visited
Ask that request is sent to the first virtual memory cell or the second virtual memory cell；And S3066, it receives and comes from the first virtual memory
The response of unit or the second virtual memory cell.
Specific processing shown in fig. 5 can be in the control for the storage system being made of the first storage device and the second storage device
Device level processed is realized.For example, when being received from host (for example, server host) for the virtual of the memory cell identification
When the access request of storage unit, controller identifies that the first virtual memory cell and the second virtual memory cell have the storage
Unit marks, and access request can be sent to the first virtual memory cell and the according to predetermined condition or random selection
One of two virtual memory cells.Predetermined condition for example can be one or more of the following items：Network condition, storage
Processing load of equipment etc..
In some embodiments, the access request for being sent to the first virtual memory cell or the second virtual memory cell can quilt
And then it is forwarded to the first storage unit corresponding with the first virtual memory cell or the second virtual memory cell or the second storage
Unit.Access request can be data write request or data read request.For example, when access request is data write request
When, upon receipt of the request, the data of request are written in the first storage unit or the second storage unit and via right
The response message that the first virtual memory cell answered or the write-in of the second virtual memory cell transmission data are completed.In another example
In, when access request is data read request, upon receipt of the request, from the first storage unit or the second storage unit
It is middle read requested data and send to have via corresponding first virtual memory cell or the second virtual memory cell read
The response message of the data taken.
Fig. 6 (a)-Fig. 6 (c) shows showing for the read-write operation between storage device according to the ... of the embodiment of the present invention and host
Example flow chart.Show the first and second storage device according to the ... of the embodiment of the present invention (for example, primary storage and standby in Fig. 6 (a)
Storage) write operation host between example flow diagram, as shown in Fig. 6 (a), the write request from host is sent to and the
The corresponding standby storage of two virtual memory facilities, it is standby be stored in receive the write request after write data into the storage in standby storage
Unit and data are synchronized to the storage unit in primary storage.According to the ... of the embodiment of the present invention first is shown in Fig. 6 (b)
And the example flow diagram of read operation of second storage device (for example, primary storage and standby storage) between host, such as Fig. 6 (b) institutes
Show, standby storage receives the read request from host and return runs through message.It is shown in Fig. 6 (b) according to of the invention real
Apply write operation with exclusive lock of the first and second storage devices (for example, primary storage and standby storage) of example between host
Example flow diagram.As shown in Fig. 6 (c), the write request from host is sent to master corresponding with the first virtual memory facilities
Data and are synchronized to standby deposit at storage unit that primary storage writes data into after receiving the write request in primary storage by storage
Storage unit in storage.In Fig. 6 (c), exclusive lock is to be written to the storage list in primary storage and standby storage the two in data
It is discharged again after member, it ensure that the consistency of the data stored in primary storage and standby storage.
Primary storage and standby storage can receive the read request from host, as between primary storage or standby storage and host
Shown in four-headed arrow.But for single write request or read request, only one can receive in primary storage and standby storage
The single read-write requests.Fig. 6 (a)-Fig. 6 (c) is respectively illustrated to be received single read request or write and asked by primary storage or standby storage
Example process when asking.It will be appreciated by those skilled in the art that when same host is sent out for identical memory cell identification
Go out multiple requests, this multiple request can randomly or according to predetermined condition be sent to the correspondence in primary storage or standby storage
Storage unit.
Fig. 7 is the schematic diagram of processing of the storage method according to the ... of the embodiment of the present invention when a storage device breaks down
Show.As shown in Figure 7, when physical store SN 12345, which breaks down, to be accessed, host is via virtual memory SN 34567
Access physical store SN 23456.In some embodiments, after any physical store, which breaks down, to be accessed, not shadow
Ring the input and output of host end data and business normal operation.Host continues normal storage thereto and initiates input-output operation,
It is the paths storage LUN accessed that host side, which may be perceived only, loss.
According to fig. 3 to the associated description of Fig. 7 it is found that storage method according to the ... of the embodiment of the present invention is virtual by storage unit
Change technology overcomes above-mentioned deficiency, realizes and stores data dual-active and zero switching time based entirely on the bottom of storage device
Technique effect.
Storage device according to the ... of the embodiment of the present invention is described with reference to Fig. 8.As shown in figure 8, according to embodiments of the present invention
Storage device 800 may include the first creation module 802, the second creation module 804 and access modules 806.First creation module
802 can be configured as creating the first virtual memory cell, the first storage in the first virtual memory cell and the first storage device
Unit is corresponding；Second creation module 804 can be configured as creating the second virtual memory cell, the second virtual memory cell and the
The second storage unit in two storage devices is corresponding；And access modules 806 can be configured as through the first virtual memory list
Member or the second virtual memory cell access corresponding first storage unit or the second storage unit.In one example, first is empty
Quasi- storage unit and the second virtual memory cell memory cell identification having the same.
In some embodiments, access modules 806 can further comprise that request receiving submodule 8062, request send submodule
Block 8064 and response receiving submodule 8066.Request receiving submodule 8062 can be configured as receiving for storage unit mark
The access request of the virtual memory cell of knowledge；Request-to-send submodule 8064 can be configured as access request being sent to the first void
Quasi- storage unit or the second virtual memory cell；And responding receiving submodule 8066 can be configured as receiving from first virtually
The response of storage unit or the second virtual memory cell.
In one embodiment, request-to-send submodule 8064 is also configured to：When the first storage device breaks down
When, access request is sent to the second virtual memory cell；Or when the second storage device breaks down, access request is sent out
It send to the first virtual memory cell.
The other details of storage device according to the ... of the embodiment of the present invention and the correlation method described above in association with Fig. 3 to Fig. 7
Identical, which is not described herein again.
Storage device according to the ... of the embodiment of the present invention can be realized by storage unit virtualization technology based entirely on storage
The bottom storage data dual-active and the technique effect of zero switching time of equipment.
According to some embodiments of the present invention, a kind of storage system, including the first storage device and the second storage are disclosed
Equipment, each storage device include storage unit and virtual memory cell corresponding with the storage unit, wherein each storage
Storage unit in equipment is accessed by virtual memory cell corresponding with the storage unit；And wherein,
Virtual memory cell storage unit having the same in virtual memory cell and the second storage device in first storage device
Mark, so that the virtual memory cell of the first storage device and the virtual memory cell of the second storage device are issued access
The host of request is considered as same virtual memory cell.
In one embodiment, can be reached for the access request of the virtual memory cell with memory cell identification
It is opposite with the virtual memory cell of memory cell identification in any storage device in one storage device and the second storage device
The storage unit answered.In another embodiment, if any storage device in the first storage device and the second storage device goes out
Existing failure, then server host the first storage device and the will can be directly reached according to the access request that memory cell identification is sent out
There is no the storage unit in the storage device to break down in two storage devices.The access request may include data write request and
Data read request.In another embodiment, if the data write request from server host reaches the first storage device
Storage unit, then the automatic data to be written of the first storage device be synchronized to the respective memory unit in the second storage device；
If the data write request from server host reaches the storage unit of the second storage device, the second storage device is automatic
Data to be written is synchronized to the respective memory unit in the first storage device.
In conjunction in Fig. 1 to Fig. 8 storage methods described and its at least part or storage system of device first or
Second storage device can be realized by computing device.Fig. 9 show can to realize storage method according to the ... of the embodiment of the present invention and its
The structure chart of the exemplary hardware architecture of dress or the computing device of the first or second storage device in storage system.Such as Fig. 9
Shown, computing device 900 includes input equipment 901, input interface 902, central processing unit 903, memory 904, output interface
905 and output equipment 906.Wherein, input interface 902, central processing unit 903, memory 904 and output interface 905
It is connected with each other by bus 910, input equipment 901 and output equipment 906 pass through input interface 902 and output interface 905 respectively
It connect with bus 910, and then is connect with the other assemblies of computing device 900.Specifically, input equipment 901 is received from outside
Input information, and input information is transmitted to by central processing unit 903 by input interface 902；Central processing unit 903 is based on depositing
The computer executable instructions stored in reservoir 904 handle to generate output information input information, and output information is faced
When or be permanently stored in memory 904, output information is then transmitted to by output equipment 906 by output interface 905；
Output information is output to the outside of computing device 900 for users to use by output equipment 906.
That is, device shown in Fig. 8 can also be implemented as include：It is stored with the storage of computer executable instructions
Device；And the storage for combining Fig. 3 to Fig. 7 to describe may be implemented when executing computer executable instructions for processor, the processor
Method.Here, processor can be based on input information and execute computer executable instructions, be described in conjunction with Fig. 3 to Fig. 8 to realize
Storage method and its device.
It should be clear that the invention is not limited in specific configuration described above and shown in figure and processing.
For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated
The step of body, is as example.But procedure of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified, modification and addition after the spirit for understanding the present invention, or suitable between changing the step
Sequence.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, application-specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, element of the invention is used to execute program or the generation of required task
Code section.Either code segment can be stored in machine readable media program or the data-signal by being carried in carrier wave is passing
Defeated medium or communication links are sent." machine readable media " may include any medium for capableing of storage or transmission information.
The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft
Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline
The computer network of net etc. is downloaded.
The present invention can realize in other specific forms, without departing from its spirit and essential characteristics.For example, particular implementation
Algorithm described in example can be changed, and system architecture is without departing from the essence spirit of the present invention.Therefore, currently
Embodiment be all counted as being exemplary rather than in all respects it is limited, the scope of the present invention by appended claims rather than
Foregoing description defines, also, falls into the meaning of claim and whole in the range of equivalent change to be included in
Among the scope of the present invention.
Claims (21)
1. a kind of storage method, which is characterized in that the method includes：
Create the first virtual memory cell, first virtual memory cell and the first storage unit phase in the first storage device
It is corresponding；
Create the second virtual memory cell, second virtual memory cell and the second storage unit phase in the second storage device
It is corresponding；And
Corresponding first storage unit is accessed by first virtual memory cell or second virtual memory cell
Or second storage unit,
Wherein described first virtual memory cell and the second virtual memory cell memory cell identification having the same.
2. storage method according to claim 1, which is characterized in that pass through first virtual memory cell or described
Two virtual memory cells access corresponding first storage unit or the processing of second storage unit includes：
Receive the access request for the virtual memory cell with the memory cell identification；
The access request is sent to first virtual memory cell or second virtual memory cell；And
Receive the response from first virtual memory cell or second virtual memory cell.
3. storage method according to claim 2, which is characterized in that it is virtual that the access request is sent to described first
The processing of storage unit or second virtual memory cell includes：
When first storage device breaks down, the access request is sent to second virtual memory cell；Or
Person
When second storage device breaks down, the access request is sent to first virtual memory cell.
4. storage method according to claim 2 or 3, which is characterized in that the access request includes data write request
And data read request.
5. according to the method described in claim 1, it is characterized in that, first virtual memory cell is created in described first
In storage device, and second virtual memory cell is created in second storage device.
6. storage method according to claim 1, which is characterized in that first storage device is main storage device, institute
It is spare storage device to state the second storage device.
7. storage method according to claim 1, which is characterized in that the memory cell identification includes sequence number SN and patrols
Collect unit number LUN.
8. a kind of storage device, which is characterized in that described device includes：
First creation module is configured as creating the first virtual memory cell, first virtual memory cell and the first storage
The first storage unit in equipment is corresponding；
Second creation module is configured as creating the second virtual memory cell, second virtual memory cell and the second storage
The second storage unit in equipment is corresponding；And
Access modules are configured as accessing by first virtual memory cell or second virtual memory cell corresponding
First storage unit or second storage unit,
Wherein described first virtual memory cell and the second virtual memory cell memory cell identification having the same.
9. storage device according to claim 8, which is characterized in that the access modules further comprise：
Request receiving submodule is configured as receiving and the access of the virtual memory cell with the memory cell identification is asked
It asks；
Request-to-send submodule is configured as the access request being sent to first virtual memory cell or described second
Virtual memory cell；And
Receiving submodule is responded, is configured as receiving from first virtual memory cell or second virtual memory cell
Response.
10. storage device according to claim 9, which is characterized in that the request-to-send submodule is additionally configured to：
When first storage device breaks down, the access request is sent to second virtual memory cell；Or
Person
When second storage device breaks down, the access request is sent to first virtual memory cell.
11. storage device according to claim 9 or 10, which is characterized in that the access request includes that data write-in is asked
Summed data read requests.
12. storage device according to claim 8, which is characterized in that first virtual memory cell is created in institute
It states in the first storage device, and second virtual memory cell is created in second storage device.
13. storage device according to claim 8, which is characterized in that first storage device is main storage device, institute
It is spare storage device to state the second storage device.
14. storage device according to claim 8, which is characterized in that the memory cell identification include sequence number SN and
Logical unit number LUN.
15. a kind of storage system, including the first storage device and the second storage device, each storage device include storage unit and
Virtual memory cell corresponding with the storage unit,
Wherein, the storage unit in each storage device is carried out by virtual memory cell corresponding with the storage unit
It accesses；
And wherein, the virtual memory cell in first storage device and the virtual memory list in second storage device
Member memory cell identification having the same, so that the virtual memory cell of first storage device and second storage
The host that the virtual memory cell of equipment is issued access request is considered as same virtual memory cell.
16. storage system according to claim 15, which is characterized in that for the virtual of the memory cell identification
The access request of storage unit can reach in first storage device and second storage device in any storage device
Storage unit corresponding with the virtual memory cell with the memory cell identification.
17. storage system according to claim 16, which is characterized in that if first storage device and described second
Any storage device in storage device breaks down, then server host is asked according to the access that the memory cell identification is sent out
It asks directly to reach and there is no depositing in the storage device to break down in first storage device and second storage device
Storage unit.
18. storage system according to claim 16, which is characterized in that the access request include data write request and
Data read request.
19. storage system according to claim 18, which is characterized in that if the data from the server host are write
Enter the storage unit that request reaches first storage device, then the automatic data to be written of the first storage device is synchronized to
Respective memory unit in second storage device；Described in if the data write request from the server host reaches
The storage unit of second storage device, then the automatic data to be written of the second storage device be synchronized to it is described first storage set
Respective memory unit in standby.
20. storage system according to claim 15, which is characterized in that first storage device is main storage device,
Second storage device is spare storage device.
21. storage system according to claim 15, which is characterized in that the memory cell identification include sequence number SN and
Logical unit number LUN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111190538A (en) * | 2019-12-20 | 2020-05-22 | 北京淇瑀信息科技有限公司 | File storage method, system, device and computer readable medium |
| CN112416652A (en) * | 2019-08-22 | 2021-02-26 | 华为技术有限公司 | Data backup method and data backup |
| CN112559258A (en) * | 2020-12-02 | 2021-03-26 | 北京字节跳动网络技术有限公司 | Disaster recovery processing method, device, system, equipment and medium |
| CN112860480A (en) * | 2020-09-11 | 2021-05-28 | 华为技术有限公司 | Double-live storage system and data processing method thereof |
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