CN109753229A - Data migration method, device, network attached storage equipment and storage medium - Google Patents
Data migration method, device, network attached storage equipment and storage medium Download PDFInfo
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Abstract
The present invention provides a kind of data migration method, device, network attached storage equipment and storage mediums, are related to field of communication technology.The data migration method includes: during source network attached storage device is by Data Migration to target network attached storage device, and target network attached storage device receives the data access request that client is sent；Target network attached storage device determines file root to be visited according to file path to be visited；Determine that file to be visited is stored in source network attached storage device according to file root to be visited, target network attached storage device has root and source network attached storage device corresponding relationship；Data access request is transmitted to source network attached storage device by target network attached storage device, receives the file to be visited that source network attached storage device is sent, and file to be visited is sent to client.Using technical solution of the present invention online data migration can be realized under the conditions of data access business is unbroken.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of data migration method, device, network attached storage equipment
And storage medium.
Background technique
Network attached storage (Network Attached Storage) equipment is a kind of exclusive data storage server, packet
Include memory device and embedded systems software.Since network attached storage equipment can manage data concentratedly, bandwidth can be discharged, is improved
Network performance, network attached storage equipment in a network using more and more extensive.
In network attached storage isomery running environment, data sometimes in different network attached storage equipment into
Row migration.At this stage, need to dispose third party's migration server, in third party's migration server using robocopy or
The Migration tools such as rsync by the Data Migration in a certain network attached storage equipment into third party's migration server, then will count
It migrates according to by third party's migration server into another network attached storage equipment.But in data migration process, client
It can not access to data.Therefore, it needs to interrupt data access business when data are migrated, cannot achieve online data
Migration.
Summary of the invention
This application provides a kind of data migration method, device, network attached storage equipment and storage mediums, can be in number
According to access business it is unbroken under the conditions of, realize online data migration.
In a first aspect, this application provides a kind of data migration methods, comprising: in source network attached storage device by data
During migrating to target network attached storage device, the target network attached storage device receives the number that client is sent
According to access request, the data access request includes the filename of file to be visited and the path of the file to be visited；Institute
State the root that target network attached storage device determines the file to be visited according to the path of the file to be visited；According to
The root of the file to be visited determines that the file to be visited is stored in the source network attached storage device, the mesh
The corresponding relationship between the root and the source network attached storage device is preserved in mark network attached storage equipment；Institute
It states target network attached storage device and the data access request is transmitted to the source network attached storage device；The target
Network attached storage equipment receives the file to be visited that the source network attached storage device is sent, and will be described to be visited
File is sent to the client.
It can be during source network attached storage device be by Data Migration to target network attached storage device, according to visitor
The path for the file to be visited in data access request that family end is sent, determines the root of file to be visited, so that it is determined that
Access the place network attached storage equipment of file.If file to be visited is stored in source network attached storage device, will count
It is sent to source network attached storage device according to access request, the lookup of file to be visited is carried out by source network attached storage device.
The file to be visited that source network attached storage device is found and sent by target network attached storage device returns to client
End.To realize data access in data migration process, the lasting progress of data access business is kept, data is avoided to visit
Ask service disconnection.Under the premise of data access business is unbroken, online data migration is realized.
With reference to first aspect, in the first possibility of first aspect, above-mentioned data migration method further include: by the source
The file directory of network attached storage equipment maps in the target network attached storage device, so that the target network
Attached storage device is stored with the file directory and the source network attached storage device of the target network attached storage device
File directory, the file directory includes the root.
In the way of mapping, so that target network attached storage device is stored with the text of target network attached storage device
The file directory of part catalogue and the source network attached storage device, so as to search the root of file to be visited.To keep away
Exempt from file to be visited in source network attached storage device, it is attached the file where file to be visited need to be copied to target network
The case where file to be visited is accessed and is handled again after storage equipment.If the file where file to be visited is copied to
Carry out the access and processing to file to be visited after target network attached storage device again, and the size of file to be visited compared with
Greatly, that file to be visited is copied to target network attached storage device the time it takes is longer.And initiate data access request
The client of business be not received by response in a longer period of time, then it is assumed that business time-out, thus interrupting service.Using this
Data migration method in inventive embodiments, directly to text to be visited in the network attached storage equipment where file to be visited
Part is accessed and is handled, and saves access time, and can effectively avoid meaningless business timeout case, reduces service disconnection
A possibility that
With reference to first aspect or in a first aspect, second of first aspect may in, deposit the target network is attached
Storage equipment receives the file to be visited that the source network attached storage device is sent, and the file to be visited is sent to
After the client, further includes: the target network attached storage device saves the source network attached storage device and sends
The file to be visited.
The interviewed data that source network attached storage device is returned are stored in target network attached storage device, avoid possibility
The data updated the not more news in target network attached storage device guarantees the standard of data in data migration process
True property.
With reference to first aspect, in the third possibility of first aspect, the data access request is asked for data write operation
It asks；The target network attached storage device receives the file to be visited that the source network attached storage device is sent, and
The file to be visited is sent to the client, comprising:, will be according to the number if the file to be visited is migrating
The file record to be visited updated according to write operation requests is in log；It waits the file migration to be visited to finish, utilizes
The file to be visited that the log finishes migration plays back.
When file to be visited is migrating, in order to avoid occurring migrating mistake, will request to update according to data write operation
File record to be visited in log, after the file migration to be visited, play back file to be visited using log, thus
Guarantee to carry out the accuracy of file to be visited after business processing in data migration process.
Second aspect, this application provides a kind of data migration devices, comprising: request receiving module, in source network
Attached storage device during Data Migration to target network attached storage device, will receive the data access that client is sent
Request, the data access request includes the filename of file to be visited and the path of the file to be visited；Root is true
Cover half block, for determining the root of the file to be visited according to the path of the file to be visited；Position determination module is used
In determining that the file to be visited is stored in the source network attached storage device according to the root of the file to be visited,
It is preserved in the target network attached storage device corresponding between the root and the source network attached storage device
Relationship；Proxy module is forwarded, the data access request is transmitted to the source for the target network attached storage device
Network attached storage equipment；Module is replied, receives the attached storage of source network for the target network attached storage device
The file to be visited that equipment is sent, and the file to be visited is sent to the client.
In conjunction with second aspect, in the first possibility of second aspect, above-mentioned data migration device further include: mapping mould
Block, for the file directory of the source network attached storage device to be mapped in the target network attached storage device, with
So that the target network attached storage device be stored with the target network attached storage device file directory and the source
The file directory of network attached storage equipment, the file directory include the root.
In conjunction with second aspect, in second of possibility of second aspect, above-mentioned data migration device further include: unloading mould
Block, the file to be visited sent for saving the source network attached storage device.
In conjunction with second aspect, in the third possibility of second aspect, the data access request is asked for data write operation
It asks；The reply module is specifically used for: if the file to be visited is migrating, will be requested more according to the data write operation
The new file record to be visited is in log；The file migration to be visited is waited to finish, using the log to migration
The file to be visited finished is played back.
The third aspect this application provides a kind of network attached storage equipment, including memory, processor and is stored in institute
The program that can be run on memory and on the processor is stated, the processor realizes above-mentioned technical side when executing described program
Data migration method in case.
Fourth aspect is stored with program, described program quilt this application provides a kind of storage medium on the storage medium
The data migration method in above-mentioned technical proposal is realized when processor executes.
This application provides a kind of data migration method, device, network attached storage equipment and storage mediums, are applied to number
According to the target network attached storage device in transition process.It can be in source network attached storage device by Data Migration to target network
During attached storage device, according to client send data access request in file to be visited path, determine to
The root for accessing file, so that it is determined that the place network attached storage equipment of file to be visited.If file to be visited is stored in
In source network attached storage device, then data access request is sent to source network attached storage device, is deposited by source network is attached
Storage equipment carries out the lookup of file to be visited.Target network attached storage device finds source network attached storage device concurrently
The file to be visited sent returns to client.To realize data access in data migration process, data is kept to visit
The lasting progress for asking business, avoids data access service disconnection.Under the premise of data access business is unbroken, realize in line number
According to migration.
Detailed description of the invention
Fig. 1 is the application scenarios schematic diagram of Data Migration in the embodiment of the present invention；
Fig. 2 is a kind of flow chart of data migration method in the embodiment of the present invention；
Fig. 3 illustrates figure for the system of Data Migration a kind of in the embodiment of the present invention
Fig. 4 is a kind of flow chart of data migration method in another embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of data migration device in one embodiment of the invention；
Fig. 6 is a kind of structural schematic diagram of data migration device in another embodiment of the present invention；
Fig. 7 is the hardware structural diagram of one of one embodiment of the invention network attached storage equipment.
Specific embodiment
The embodiment of the invention provides a kind of data migration method, device, network attached storage equipment and storage mediums, can
Applied in the scene for carrying out Data Migration between network attached storage equipment.Multiple network attached storage equipment can isomery each other
Equipment, that is to say, that multiple network attached storage equipment can deposit for the different structure of different vendor, the network attached of various criterion
Store up equipment.Fig. 1 is the application scenarios schematic diagram of Data Migration in the embodiment of the present invention.Data can be in the form of a file multiple
It is migrated in network attached storage equipment.As shown in Figure 1, file can be in network attached storage equipment A, network attached storage equipment B
It is migrated between network attached storage equipment C.In embodiments of the present invention, in data migration process, client is still
Accessible file.That is, client still can continue task in data migration process.Data are moved
Shifting not will lead to service disconnection, to realize that online data migrates.Wherein, client can be the control such as computer, console, mobile phone
Terminal processed.In data migration process, client can carry in target network attached storage device.The attached storage of target network is set
Standby is the destination network attached storage device of Data Migration, and source network attached storage device is that the Origination network of Data Migration is attached
Belong to storage equipment.It can be led to by standard agreement between target network attached storage device and source network attached storage device
Letter, for example utilize Network File System (Network File System, NFS) standard agreement or universal network file system
(Common Internet File System, CIFS) standard agreement etc. is communicated.I.e. data are in a manner of file by source net
Network attached storage device is migrated to target network attached storage device.For example, data are attached by network attached storage equipment B and network
Belonging to storage equipment C to migrate to network attached storage equipment A, then network attached storage equipment A is target network attached storage device,
Network attached storage equipment B and network attached storage equipment C is source network attached storage device.Carry is attached to target network
The client of storage equipment can obtain the text of all data in target network attached storage device and source network attached storage device
File directory (total) in part catalogue, that is, Fig. 1, and can be shown in client.
Fig. 2 is a kind of flow chart of data migration method in the embodiment of the present invention.Data migration method can be by target network
Attached storage device executes.As shown in Fig. 2, data migration method may include step S101 to step S105.
In step s101, in source network attached storage device by Data Migration to the mistake of target network attached storage device
Cheng Zhong, target network attached storage device receive the data access request that client is sent.
Target network attached storage device initiates migration request, request data migration to source network attached storage device.Source
Network attached storage equipment receives migration request, responds the migration request, and data are moved to target network attached storage device
It moves.Target network attached storage device receive by source network auxiliary device migrate Lai data.In one example, it is moved in data
During shifting, data can be locked, avoid the data access request of multi-user it is parallel caused by loss of data or inconsistent
The problem of, to guarantee the consistency of data.In data migration process, client can carry to target network it is attached storage set
Standby, client can send data access request to target attached storage device.Target network attached storage device can receive and locate
Manage the data access request that client is sent.
Data access request includes the filename of file to be visited and the path of file to be visited, so as to using to
The filename of file and the path of file to be visited are accessed, file to be visited is accessed.For example, the file of file to be visited is entitled
" exam results ", the path of file to be visited are " ServerC FolderC_1 exam results ", then can determine to
The position that access file specifically stores.
Data access request may include that data reading operation asks summed data write operation requests.Data reading operation request is requested
Read file to be visited.Data write operation request i.e. request carries out write operation to file to be visited, for example increases, modifies, deletes
Deng.
In step s 102, target network attached storage device determines file to be visited according to the path of file to be visited
Root.
Root learns root it can be learnt that file to be visited is stored in tool to the most upper level catalogue of logical drive
In which network attached storage equipment of body, also it can be seen that file to be visited is stored in target network attached storage device or source net
Network attached storage device.For example, the path of file to be visited is " ServerC FolderC_1 exam results ", then wait visit
The root for asking file is " ServerC ".
In step s 103, determine that file to be visited is stored in the attached storage of source network according to the root of file to be visited
In equipment.
The corresponding pass between root and source network attached storage device is being preserved in target network attached storage device
System.The data for participating in the source network attached storage device of data migration process can be one, can also be multiple.Target network is attached
Storing equipment can be according to the root of file to be visited, in the corresponding relationship between root and source network attached storage device
Lookup obtains source network attached storage device corresponding with the root of file to be visited, so that it is determined that storing file to be visited
Source network attached storage device.It should be noted that the time with data migration process elapses, the path of file to be visited can
Real-time update, the root of file to be visited also with path update and update.Similarly, in target network attached storage device
Root and the corresponding relationship of source network attached storage device can also be with real-time updates.
For example, the corresponding relationship between root and source network attached storage device includes: " ServerA " attached with network
It is corresponding to belong to storage equipment A, " ServerB " is corresponding with network attached storage equipment B, and " ServerC " is set with network attached storage
Standby C is corresponding.If the root of file to be visited is " ServerB ", the corresponding source net of the root of file to be visited can determine
Network attached storage device is network attached storage equipment B.
For another example, if the access path of file to be visited be E: ServerB FolderB_3, can determine text to be visited
Part is located in target network attached storage device, that is, network attached storage equipment B.If the access path of file to be visited be G:
ServerC FolderC_1, then can determine that file to be visited is located at source network attached storage device i.e. network attached storage equipment C
In.
In step S104, data access request is transmitted to the attached storage of source network and set by target network attached storage device
It is standby.
File to be visited is stored in source network attached storage device, then target network attached storage device is by data access
Request is transmitted to source network attached storage device.File to be visited is searched by source network attached storage device, source network is attached to be deposited
Storage equipment can be handled file to be visited, and the file to be visited found is returned to target network attached storage device.
Target network attached storage device receives the file to be visited that source network attached storage device returns, by the attached storage of target network
The file to be visited that equipment returns to source network attached storage device returns to client.
In step s105, target network attached storage device receives the text to be visited that source network attached storage device is sent
Part, and file to be visited is sent to client.
Data access request may include that data reading operation asks summed data write operation requests.If data access request is data
Read operation request, then data reading operation request is transmitted to source network attached storage device by target network attached storage device, by
Source network attached storage device is requested according to data reading operation, searches file to be visited, and file to be visited is returned to target network
Network attached storage device, target network attached storage device return again to file to be visited to client.
If data access request is data write operation request, target network attached storage device requests data write operation
It is transmitted to source network attached storage device.Source network attached storage device searches file to be visited according to data write operation request,
And write operation is carried out to the data in file to be visited, and the file to be visited updated according to data write operation request is returned to
Target network attached storage device, the file to be visited that target network attached storage device will be updated according to data write operation request
Return to client.
In one example, if the root of file to be visited is not belonging to source network attached storage device, can determine to
The root of access file belongs to target network attached storage device.Target network attached storage device is according to file to be visited
Root determines that file to be visited is stored in target network attached storage device, then can be accessed and be stored according to data access request
File to be visited in target network attached storage device, and file to be visited is returned into client.It is moved completing data
It, can be offline by source network attached storage device after shifting.Business is completed in target network attached storage device.
In embodiments of the present invention, in source network attached storage device by Data Migration to target network attached storage device
During, the path of the file to be visited in data access request sent according to client determines the root of file to be visited
Catalogue, so that it is determined that the place network attached storage equipment of file to be visited.If file to be visited is stored in, source network is attached to be deposited
Store up equipment in, then data access request is sent to source network attached storage device, by source network attached storage device carry out to
Access the lookup of file.Source network attached storage device is found and is sent to be visited by target network attached storage device
File returns to client.To realize data access in data migration process, continuing for data access business is kept
It carries out, avoids data access service disconnection.Under the premise of data access business is unbroken, online data migration is realized.
In the above two embodiments, available, the access and processing to file to be visited are in file to be visited
It is carried out in the network attached storage equipment at place.To avoiding file to be visited in source network attached storage device, needing will be to
File where access file, which copies to after target network attached storage device, to access and handles to file to be visited again
The case where.It is carried out again if the file where file to be visited is copied to after target network attached storage device to file to be visited
Access and processing, and the size of file to be visited is larger, and file to be visited is copied to target network attached storage device
The time it takes is longer.And the client for initiating the business of data access request is not received by back in a longer period of time
It answers, then it is assumed that business time-out, thus interrupting service.Using the data migration method in the embodiment of the present invention, directly to be visited
File to be visited is accessed and handled in network attached storage equipment where file, saves access time, and can have
A possibility that effect avoids meaningless business timeout case, reduces service disconnection.
Fig. 3 illustrates figure for the system of Data Migration a kind of in the embodiment of the present invention.As shown in figure 3, Data Migration
System may include client, target network attached storage device and source network attached storage device.ISILON/ in Fig. 3
NETAPP/VNX, 9000FS and TFS are the network attached storage equipment of different vendor, while being also used as the attached storage of source network
Equipment.Client carry is connect in target network attached storage device with target network attached storage device.Target network is attached
Storage equipment includes input/output control module (abbreviation I/O control module), network attached storage Virtual File System (abbreviation
NAS_VFS), backstage transferring module, universal network file system/Network File System and customer's representative (Client Agent,
CA)/portable operating system Application of Interface adaptation layer (Portable Operating System Interface of UNIX,
PAL)。
Wherein, input/output control module can locating file catalogue, thus the position of location data.It is network attached to deposit
Storage Virtual File System may include third party's Virtual File System (abbreviation Third_VFS) and private virtual file system (abbreviation
Private_VFS).Third party's Virtual File System and privately owned file system are directed to the business of different range.Universal network file
System/network file system and customer's representative/portable operating system Application of Interface adaptation layer are to be suitable for different business
System and equipment.Backstage transferring module can call the interface of customer's representative and portable operating system Application of Interface adaptation layer read-write text
Data in part also can control universal network file system/carry out between Network File System and source network attached storage device
The migration of data.
Fig. 4 is a kind of flow chart of data migration method in another embodiment of the present invention.Data migration method shown in Fig. 4
For a kind of specific implementation of data migration method shown in Fig. 2.Step S105 in Fig. 2 can be refined as the step in Fig. 4
S1051 and step S1052；Data migration method in Fig. 4 may also include step S106 and step 107.
It is to be visited by being updated according to data write operation request if file to be visited is migrating in step S1051
File record is in log.
In embodiments of the present invention, data access request is data write operation request, that is, needs to carry out file to be visited
Write operation.If file to be visited is migrating, a part of Data Migration to the attached storage of target network of file to be visited is set
Standby, another part data of file to be visited do not migrate also to target network attached storage device.In order to avoid loss of data or
Mistake occurs, can request the file record to be visited updated in log, that is, log data write operation.
In step S1052, file migration to be visited is waited to finish, using log to the file to be visited that finishes of migration into
Row playback.
It is played back using the file to be visited that log finishes migration, that is, file migration to be visited is waited to finish, utilized
The migration in file to be visited replacement target network attached storage device updated in log according to data write operation request finishes
File to be visited.
In another example, if file to be visited does not have started migration or migrated success, and file to be visited is worked as
Preceding position is source network attached storage device, then can store the file to be visited updated according to data write operation request
In target network attached storage device, it can also store in source network attached storage device according to data write operation request update
File to be visited.
In step s 106, the file directory of source network attached storage device is mapped into target network attached storage device
In so that target network attached storage device be stored with target network attached storage device file directory and source network it is attached
Store the file directory of equipment.
Client can carry to target network attached storage device, i.e., client by with target network attached storage device
Between data interaction realize business.In one example, target network attached storage device can construct all network attached
Store the global name space (global namespace, GNS) of equipment.Wherein, all network attached storage equipment includes
Target network attached storage device and source network attached storage device.Target network attached storage device constructs global name space
When, the file directory of target network attached storage device is put into global name space.It include target network in global name space
On the basis of network attached storage device, the file directory of source network attached storage device is mapped in global name space, is made
Obtaining global name space includes the file directory of source network attached storage device and the file mesh of target network attached storage device
Record.It include root in file directory.File directory can regard storage array as, and each record in file directory, which can be regarded as, to be deposited
Store up an element in array.
For example, as shown in Figure 1, target network attached storage device is network attached storage equipment A, the attached storage of source network
Equipment includes network attached storage equipment B and network attached storage equipment C.File directory A packet in network attached storage equipment A
" ServerA FolderA_1 ", " ServerA FolderA_2 " and " ServerA FolderA_3 " is included, root is
"ServerA\"；File directory B in network attached storage equipment B include " ServerB FolderB_1 ", " ServerB
FolderB_2 " and " ServerB FolderB_3 ", root are " ServerB "；File in network attached storage equipment C
Catalogue C includes " ServerC FolderC_1 ", " ServerC FolderC_2 " and " ServerC FolderC_3 ", root
For " ServerC ".By mapping after, the file directory (total) in global name space include file directory A, file directory B and
File directory C, file directory (total) include root " ServerA " " ServerB " and " ServerC ".
It should be noted that the file directory of source network attached storage device is only mapped to global life by mapping here
The name space does not also migrate the data in source network attached storage device into target attached storage device all.
In one example, in building global name space, and the file directory of former network attached storage equipment is also reflected
After being incident upon global name space, client can also show total file directory, but total file directory and mesh that client is shown
The file directory marked in the global name space in network attached storage equipment after mapping is different, what client was shown
Total file directory can not record data and be currently present in target network attached storage device or source network attached storage device, but
The file directory obtained after mapping in global name space has recorded between root and each network attached storage equipment
Corresponding relationship, the corresponding relationship between root and each network attached storage equipment include that root is set with the attached storage of source network
Corresponding relationship between standby.File directory has recorded the storage location i.e. access path of file, and file includes data.Global naming
File directory in space real-time update or can periodically update, similarly, between root and each network attached storage equipment
Corresponding relationship is also with real-time update or periodically updates.Therefore in data migration process, the attached storage of target network is set
The standby transition state that file can be perceived by passing through the file directory that mapping obtains in global name space, the migration shape of file
State is the current position of file.
In data migration process, client carry to target network attached storage device, client can be attached to target
It stores equipment and sends data access request.Data access request includes the access path of file to be visited.Target network is attached to be deposited
Storage equipment receives data access request, can be according to the access path of file to be visited in data access request, in global naming
It is searched in file directory in space, so that it is determined that the position of the file to be visited of data access request instruction.It is to be visited
The position of file includes target network attached storage device or source network attached storage device.If the place of file to be visited
Position is source network attached storage device, and the number of source network attached storage device is two or more, then file to be visited
It position can be specifically to one of source network attached storage device.
In step s 107, target network attached storage device saves the text to be visited that source network attached storage device is sent
Part.
If file to be visited is stored in source network attached storage device, source network attached storage device needs will be wait visit
Ask that file first returns to target network attached storage device, file to be visited is returned to visitor again by target network attached storage device
Family end.When source network attached storage device needs file to be visited first returning to target network attached storage device, target
File to be visited can be stored in target network attached storage device by network attached storage equipment.
Fig. 5 is a kind of structural schematic diagram of data migration device 200 in one embodiment of the invention.As shown in figure 5, data are moved
Moving device 200 may include request receiving module 201, root determining module 202, position determination module 203, forwarding proxy module
204 and reply module 205.
Request receiving module 201, in source network attached storage device by Data Migration to the attached storage of target network
During equipment, the data access request that client is sent is received, the data access request includes the text of file to be visited
The path of part name and the file to be visited.
The related description of request receiving module 201 can be found in the related description part of step S101 in above-described embodiment.Tool
Body, request receiving module 201 can be integrated in the processor of network attached storage equipment.
Root determining module 202, for determining the root of the file to be visited according to the path of the file to be visited
Catalogue.
The related description of root determining module 202 can be found in the related description part of step S102 in above-described embodiment.
Specifically, root determining module 202 can be integrated in the processor of network attached storage equipment.
Position determination module 203, for determining that the file to be visited stores according to the root of the file to be visited
In the source network attached storage device, the root and the source are preserved in the target network attached storage device
Corresponding relationship between network attached storage equipment.
The related description of position determination module 203 can be found in the related description part of step S103 in above-described embodiment.Tool
Body, position determination module 203 can be integrated in the processor of network attached storage equipment.
Proxy module 204 is forwarded, is transmitted to the data access request for the target network attached storage device
The source network attached storage device.
The related description of forwarding proxy module 204 can be found in the related description part of step S104 in above-described embodiment.Tool
Body, forwarding proxy module 204 can be integrated in the processor of network attached storage equipment.
Module 205 is replied, receives the source network attached storage device hair for the target network attached storage device
The file to be visited sent, and the file to be visited is sent to the client.
The related description for replying module 205 can be found in the related description part of step S105 in above-described embodiment.Specifically,
Replying module 205 can be integrated in the processor of network attached storage equipment.
In embodiments of the present invention, Data Migration to the attached storage of target network can be set in source network attached storage device
In standby process, the path of the file to be visited in data access request sent according to client determines file to be visited
Root, so that it is determined that the place network attached storage equipment of file to be visited.If it is attached that file to be visited is stored in source network
It stores in equipment, then data access request is sent to source network attached storage device, is carried out by source network attached storage device
The lookup of file to be visited.Target network attached storage device source network attached storage device is found and is sent wait visit
Ask that file returns to client.To realize data access in data migration process, holding for data access business is kept
It is continuous to carry out, avoid data access service disconnection.Under the premise of data access business is unbroken, online data migration is realized.
And access to file to be visited and processing are in the network attached storage equipment where file to be visited
It carries out, to avoid file to be visited in source network attached storage device, it is attached file to be visited need to be copied to target network
Belong to the case where file to be visited is accessed and handled again after storing equipment.It is directly attached in the network where file to be visited
Belong to and file to be visited is accessed and handled in storage equipment, saves access time, and can effectively avoid meaningless industry
A possibility that business timeout case, reduction service disconnection.
In another embodiment of the invention, data access request is data write operation request, returning in above-described embodiment
Multiple module 205 is specifically used for:, will be according to the institute of data write operation request update if the file to be visited is migrating
File record to be visited is stated in log；It waits the file migration to be visited to finish, migration is finished using the log
The file to be visited is played back.It is related to step S1052's to illustrate the step S1051 that can be found in above-described embodiment
Declaratives.
When interviewed data are migrating, in order to avoid occurring migrating mistake, by what is updated according to data write operation request
Interviewed data are recorded in log, after this is interviewed Data Migration, using log playback of data, to guarantee Data Migration
In the process carry out business processing after data accuracy.
If the position of interviewed data is target network attached storage device, access agent module 204 can be in target
File to be visited is searched in network attached storage equipment, and the file to be visited found is returned into client.In interviewed number
According to carrying out searching in the network attached storage equipment at place and the operation such as relevant treatment so that in transition process, to data into
Row processing is more intuitive quick.
Fig. 6 is a kind of structural schematic diagram of data migration device 200 in another embodiment of the present invention.The difference of Fig. 6 and Fig. 5
Place is that data migration device 200 shown in fig. 6 may also include mapping block 206 and unloading module 207.
Mapping block 206, for the file directory of the source network attached storage device to be mapped to the target network
In attached storage device, so that the target network attached storage device is stored with the target network attached storage device
The file directory of file directory and the source network attached storage device, the file directory include the root.
The related description of mapping block 206 can be found in the related description part of step S106 in above-described embodiment.Map mould
Block 206 can be integrated in the processor of network attached storage equipment.
Unloading module 207, the file to be visited sent for saving the source network attached storage device.
The related description of unloading module 207 can be found in the related description part of step S107 in above-described embodiment.Unloading mould
Block 205 can be integrated in the processor of network attached storage equipment.
The interviewed data that source network attached storage device is returned are stored in target network attached storage device, avoid possibility
The data updated the not more news in target network attached storage device guarantees the standard of data in data migration process
True property.
It can be by network attached storage in conjunction with the data migration method and device of Fig. 1 to Fig. 6 embodiment of the present invention described
Equipment 300 is realized.Fig. 7 is the hardware structural diagram of one of one embodiment of the invention network attached storage equipment 300.
Network attached storage equipment 300 includes memory 301, processor 302 and is stored on memory 301 and can locate
The computer program run on reason device 302.
In one example, above-mentioned processor 302 may include central processing unit (CPU) or specific integrated circuit
(ASIC), or may be configured to implement the embodiment of the present invention one or more integrated circuits.
Memory 301 may include the mass storage for data or instruction.For example it rather than limits, memory
301 may include hard disk drive (i.e. HDD), floppy disk drive, flash memory, CD, magneto-optic disk, tape or universal serial bus (i.e.
USB) the combination of driver or two or more the above.In a suitable case, memory 301 may include that can be removed
Non-removable or fixed medium.In a suitable case, memory 301 can be in the inside of network attached storage equipment 300
Or it is external.In a particular embodiment, memory 301 is non-volatile solid state memory.In a particular embodiment, memory 301
Including read-only memory (i.e. ROM).In a suitable case, which can be the ROM of masked edit program, programming ROM (i.e.
PROM), erasable PROM (i.e. EPROM), electric erasable PROM (i.e. EEPROM), electrically-alterable ROM (i.e. EAROM) or flash memory or
The combination of two or more the above of person.
Processor 302 is run and executable program generation by reading the executable program code stored in memory 301
The corresponding program of code, for executing the data migration method in above-described embodiment.
In one example, network attached storage equipment 300 may also include communication interface 303 and bus 304.Wherein, such as
Shown in Fig. 7, memory 301, processor 302, communication interface 303 connect by bus 304 and complete mutual communication.
Communication interface 303 is mainly used for realizing in the embodiment of the present invention between each module, device, unit and/or equipment
Communication.It can also the access input equipment of communication interface 303 and/or output equipment.
Bus 304 includes hardware, software or both, and the component of sample frequency recommendation apparatus 300 is coupled to each other together.
For example it rather than limits, bus 304 may include accelerated graphics port (i.e. AGP) or other graphics bus, enhancing industrial standard
Framework (i.e. EISA) bus, front side bus (i.e. FSB), super transmission (i.e. HT) interconnection, Industry Standard Architecture (i.e. ISA) bus, nothing
Limit bandwidth interconnection, low pin count (i.e. LPC) bus, memory bus, micro- channel architecture (i.e. MCA) bus, peripheral component interconnection
(i.e. PCI) bus, PCI-Express (i.e. PCI-X) bus, Serial Advanced Technology Attachment (i.e. SATA) bus, video electronic mark
The combination of VESA Video Electronics Standard Association's part (i.e. VLB) bus or other suitable buses or two or more the above.Suitable
In the case of, bus 304 may include one or more buses.Although specific bus has been described and illustrated in the embodiment of the present invention,
The present invention considers any suitable bus or interconnection.
One embodiment of the invention also provides a kind of storage medium, is stored with program on the storage medium, and the program is processed
Device realizes the data migration method in above-described embodiment when executing.
Claims (10)
1. a kind of data migration method characterized by comprising
During source network attached storage device is by Data Migration to target network attached storage device, the target network
Attached storage device receives the data access request that client is sent, and the data access request includes the file of file to be visited
The path of name and the file to be visited；
The target network attached storage device determines the root mesh of the file to be visited according to the path of the file to be visited
Record；
Determine that the file to be visited is stored in the source network attached storage device according to the root of the file to be visited
In, pair between the root and the source network attached storage device is preserved in the target network attached storage device
It should be related to；
The data access request is transmitted to the source network attached storage device by the target network attached storage device；
The target network attached storage device receives the file to be visited that the source network attached storage device is sent, and
The file to be visited is sent to the client.
2. the method according to claim 1, wherein further include:
The file directory of the source network attached storage device is mapped in the target network attached storage device, so that
The target network attached storage device be stored with the target network attached storage device file directory and the source network
The file directory of attached storage device, the file directory include the root.
3. the method according to claim 1, wherein receiving the source in the target network attached storage device
The file to be visited that network attached storage equipment is sent, and after the file to be visited is sent to the client,
Further include:
The target network attached storage device saves the file to be visited that the source network attached storage device is sent.
4. the method according to claim 1, wherein the data access request is data write operation request；
The target network attached storage device receives the file to be visited that the source network attached storage device is sent, and
The file to be visited is sent to the client, comprising:
If the file to be visited is migrating, the file to be visited updated according to data write operation request is remembered
Record is in log；
It waits the file migration to be visited to finish, is returned using the file to be visited that the log finishes migration
It puts.
5. a kind of data migration device characterized by comprising
Request receiving module, in source network attached storage device by Data Migration to the mistake of target network attached storage device
Cheng Zhong, receive client send data access request, the data access request include file to be visited filename and
The path of the file to be visited；
Root determining module, for determining the root of the file to be visited according to the path of the file to be visited；
Position determination module, for determining that the file to be visited is stored in the source according to the root of the file to be visited
In network attached storage equipment, the root is preserved in the target network attached storage device and the source network is attached
Store the corresponding relationship between equipment；
Proxy module is forwarded, the data access request is transmitted to the source net for the target network attached storage device
Network attached storage device；
Module is replied, is received described in the source network attached storage device transmission for the target network attached storage device
File to be visited, and the file to be visited is sent to the client.
6. device according to claim 5, which is characterized in that further include:
Mapping block, for the file directory of the source network attached storage device to be mapped to the attached storage of the target network
In equipment, so that the target network attached storage device is stored with the file directory of the target network attached storage device
With the file directory of the source network attached storage device, the file directory includes the root.
7. device according to claim 5, which is characterized in that further include:
Unloading module, the file to be visited sent for saving the source network attached storage device.
8. device according to claim 5, which is characterized in that the data access request is data write operation request；
The reply module is specifically used for:
If the file to be visited is migrating, the file to be visited updated according to data write operation request is remembered
Record is in log；
It waits the file migration to be visited to finish, is returned using the file to be visited that the log finishes migration
It puts.
9. a kind of network attached storage equipment, which is characterized in that including memory, processor and be stored on the memory simultaneously
The program that can be run on the processor, the processor are realized when executing described program as any one in Claims 1-4
Data migration method described in.
10. a kind of storage medium, which is characterized in that be stored with program on the storage medium, described program is executed by processor
Data migration method of the Shi Shixian as described in any one of Claims 1-4.
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| CN109753229B (en) | 2020-09-18 |
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