CN103729265B - A kind of guard method storing data and device - Google Patents
A kind of guard method storing data and device Download PDFInfo
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- CN103729265B CN103729265B CN201310744238.0A CN201310744238A CN103729265B CN 103729265 B CN103729265 B CN 103729265B CN 201310744238 A CN201310744238 A CN 201310744238A CN 103729265 B CN103729265 B CN 103729265B
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- G06F16/128—Details of file system snapshots on the file-level, e.g. snapshot creation, administration, deletion
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Abstract
The invention discloses a kind of guard method storing data and device, belong to network and connect field of storage.Described method includes: receiving attribute and arrange instruction, described attribute arranges instruction request and arranges the File Snapshot level attribute of file in file system；Instruction is set according to described attribute the File Snapshot level attribute of described file is set；Receiving snapshot and create instruction, described snapshot creates in instruction and carries the File Snapshot level attribute parameter needing document to be protected；Create the ROW read-only materialized view redirecting ROW technology when instruction creates and uses for described file system and write according to described snapshot, the read-only materialized view level attribute of described ROW read-only materialized view is arranged according to described File Snapshot level attribute parameter.This document snapshot level attribute is configured by the present invention; and specify this read-only materialized view to need the snapshot rank of document to be protected when system file is created read-only materialized view; which document creation snapshot that this is file system is determined according to application scenarios; control the use space of snapshot, reduce the space of the file system that read-only materialized view takies.
Description
Technical field
The present invention relates to network and connect field of storage, particularly to a kind of guard method storing data and device.
Background technology
At NAS(Network Attached Storage, network connects storage) field, to FS(File System,
File system) whole creation uses ROW(Redirect-on-write, redirect when writing) ROW of technology is only
Reading snapshot is the mainstream technology realizing storage data protection.Before the ROW read-only materialized view of FS directly protects the writing of FS
Data block, i.e. ROW read-only materialized view will take the free space distributing to FS.At present FS is created ROW read-only
It is overall that the technology of snapshot is both for FS, when, after amendment frequent to FS, it is a large amount of that ROW read-only materialized view can occupy FS
Space.Such as one total free space is the FS of 100MB, the file 1 of one 17.94MB of write, creates one
Individual ROW read-only materialized view, is then covered by the file 1 write above, and 4 times the most repeatedly, ROW read-only materialized view tires out
Long-pending exclusive space is up to 53.89MB, and the free space of former FS drops to 28.1MB.When writing to this FS again
During the file of one 37MB, arise that FS insufficient space, the mistake that can not write.It is thus desirable to one is deposited
The guard method of storage data, takies the defect in the too much space of source file system solving ROW read-only materialized view.
Prior art proposes the guard method of the storage data that several reduction read-only materialized view takes up room: method
One, configuration FS ROW read-only materialized view reserve, but ROW read-only materialized view space can surpass this reserve；Method two,
The configuration automatic dilatation of FS；Method three, configuration FS are automatically deleted ROW read-only materialized view.
Prior art at least there is problems in that
ROW read-only materialized view takies a large amount of FS free space, causes FS unavailable, directly affects and be positioned at critical path
The important service of the FS in footpath；Measure for the problems referred to above, it is impossible to fundamentally solve ROW read-only materialized view big
The problem that amount takies FS free space.
Summary of the invention
The invention provides a kind of guard method storing data and device, technical scheme is as follows.
First aspect, it is provided that the guard method of storage data, described method includes: receives attribute and arranges finger
Order, described attribute arranges instruction request and arranges the File Snapshot level attribute of file in file system；According to institute
State attribute to arrange instruction and arrange the File Snapshot level attribute of described file；Receive snapshot and create instruction, described
Snapshot creates in instruction and carries the File Snapshot level attribute parameter needing document to be protected；According to described snapshot
Create instruction and create ROW read-only materialized view, the read-only materialized view of described ROW read-only materialized view for described file system
Level attribute is arranged according to described File Snapshot level attribute parameter；When specified file is modified, sentence
The File Snapshot level attribute of disconnected described specified file and the read-only materialized view level of the ROW read-only materialized view created
Whether other attribute mates, and coupling time according to the described ROW read-only materialized view created to described specified file
Carry out writing front protection.
In conjunction with first aspect, in the first possible implementation of first aspect, create according to described snapshot
Build instruction and create read-only materialized view for described file system, including: by sharing the side of root with described file system
Formula creates described ROW read-only materialized view；Described ROW is set according to described File Snapshot level attribute read-only soon
According to read-only materialized view level attribute；The system of described file system is set according to described read-only materialized view level attribute
Snapshot level attribute.
In conjunction with the first possible implementation of first aspect or first aspect, at the second of first aspect
In possible implementation, described system snapshot level attribute includes the set of snapshot rank-logical time point pair,
Wherein said snapshot rank represents the snapshot rank of the file that described ROW read-only materialized view protects, during described logic
Between point represent create described ROW read-only materialized view logical time point；Described read-only materialized view level attribute includes soon
According to the set of rank-logical time point pair, wherein said snapshot rank represents the snapshot level needing document to be protected
Not, described logical time point represents the logical time point creating described ROW read-only materialized view.
In conjunction with first aspect, in the third possible implementation of first aspect, described snapshot creates and refers to
Snapshot title is also carried in order；Described establishment according to described snapshot instructs as described file system establishment read-only materialized view
Afterwards, also include: according to ROW read-only materialized view described in described snapshot name nominating.
In conjunction with the implementation that the second of first aspect is possible, in the 4th kind of possible realization of first aspect
In mode, described is, after described file system creates read-only materialized view, also to wrap according to the establishment instruction of described snapshot
Include: receive the request accessing described ROW read-only materialized view；The value of output file snapshot level attribute is with described
The file that the value of the snapshot rank of the read-only materialized view level attribute of ROW read-only materialized view is equal.
In conjunction with the implementation that the second of first aspect is possible, in the 5th kind of possible realization of first aspect
In mode, described when specified file is modified, it is judged that the File Snapshot rank of described specified file belongs to
Property whether mate with the read-only materialized view level attribute of the ROW read-only materialized view created, and coupling time according to institute
State the ROW read-only materialized view created and described specified file is write front protection, including: receive described appointment
The amendment data of file；According to the data of specified file described in described amendment data modification, and by amended
The new data of described specified file is saved in new Disk Locality；The described file system judging to have created only
Read in snapshot, if there is the value of the snapshot rank of read-only materialized view level attribute and the file of described specified file
The read-only materialized view that the value of snapshot level attribute is equal；If existing, retain the old number before the amendment of described specified file
According to, and the root of described ROW read-only materialized view is pointed to the legacy data of described specified file；Otherwise, described in deleting
Legacy data before specified file amendment.
Second aspect, it is provided that a kind of protection device storing data, described device includes: receive unit,
Arranging instruction for receiving attribute, described attribute arranges instruction request, and to arrange the file of file in file system fast
According to level attribute, and be used for receiving snapshot establishment instruction, described snapshot creates to carry in instruction needs protection
The File Snapshot level attribute parameter of file；Unit is set, for the genus received according to described reception unit
Property instruction is set the File Snapshot level attribute of described file is set；Snapshot creating unit, for according to described
The snapshot establishment instruction receiving unit reception creates read-only materialized view for described file system, fast according to described file
The read-only materialized view level attribute of described ROW read-only materialized view is set according to level attribute parameter；File protected location,
For when specified file is modified, it is judged that the File Snapshot level attribute of described specified file with create
Whether the read-only materialized view level attribute of the ROW read-only materialized view built mates, and creates according to described when coupling
ROW read-only materialized view described specified file is write front protection.
In conjunction with second aspect, in the first possible implementation of second aspect, described snapshot creates single
Unit includes: creation module, read-only for creating described ROW by the way of sharing root with described file system
Snapshot；Module is set, after creating described ROW read-only materialized view in described creation module, according to described
File Snapshot level attribute arranges the read-only materialized view level attribute of described ROW read-only materialized view, and according to described
Read-only materialized view level attribute arranges the system snapshot level attribute of described file system.
In conjunction with the first possible implementation of second aspect, the realization that the second in second aspect is possible
In mode, described logging modle, be additionally operable to be recorded as described system snapshot level attribute to include snapshot rank-
The set of logical time point pair, wherein said snapshot rank represents the file that described ROW read-only materialized view protects
Snapshot rank, described logical time point represents the logical time point creating described ROW read-only materialized view；By described
Read-only materialized view level attribute is recorded as including the set of snapshot rank-logical time point pair, wherein said snapshot level
The snapshot rank of document to be protected, described logical time point Biao Shi not needed to represent, and the described ROW of establishment is read-only soon
According to logical time point.
In conjunction with second aspect, in the third possible implementation of second aspect, described reception unit,
It is additionally operable to receive the snapshot establishment instruction carrying snapshot title；Described creation module, is additionally operable to described in basis connect
Receive ROW read-only materialized view described in the snapshot name nominating carried in the snapshot establishment instruction that unit receives.
In conjunction with the implementation that the second of second aspect is possible, in the 4th kind of possible realization of second aspect
In mode, described reception unit, be additionally operable to described snapshot creating unit create described ROW read-only materialized view it
After, receive described user and access the request of described ROW read-only materialized view；Described device also includes: output unit,
With described ROW only the value of output file snapshot level attribute is asked for receive according to described reception unit
Read the file that the value of snapshot rank in the read-only materialized view level attribute of snapshot is equal.
In conjunction with second aspect, second aspect the first, the second, the third or the 4th kind of possible realization
Mode, in the 5th kind of possible implementation of second aspect, described reception unit, it is additionally operable to reception described
The amendment data of specified file in file system；Described device also includes: modified module, for according to described
Receive the data of specified file described in the amendment data modification that unit receives, and by amended described appointment literary composition
The new data of part is saved in new Disk Locality；Judge module, is used for amended at described modified module
After the new data of described specified file is saved in new Disk Locality, it is judged that the described file system created
Read-only materialized view in, if there is value and the described specified file of the snapshot rank of read-only materialized view level attribute
The read-only materialized view that the value of File Snapshot level attribute is equal；Root module, for judging to deposit at described judge module
The ROW that read-only materialized view level attribute matches with the File Snapshot level attribute of described specified file is read-only soon
According to time, the root of described ROW read-only materialized view is pointed to the legacy data of described specified file；Removing module, is used for
The File Snapshot rank genus not depositing read-only materialized view level attribute with described specified file is judged at described judge module
Property match read-only materialized view time, delete described specified file amendment before legacy data.
The technical scheme that the embodiment of the present invention provides can be right by increasing the File Snapshot level attribute of file
This document snapshot level attribute is configured, and different files can be arranged to different snapshot ranks, with
Time to system file create ROW read-only materialized view time specify this ROW read-only materialized view to need document to be protected
Snapshot rank, allows ROW read-only materialized view only protect those to need vital document to be protected, it is possible to effectively to reduce
FS space is taken by ROW read-only materialized view.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the guard method flow chart of the storage data that the embodiment of the present invention one provides；
Fig. 2 is the guard method flow chart of the storage data that the embodiment of the present invention two provides；
Fig. 3 is the snapshot level attribute schematic diagram of the file of the fs1 of the embodiment of the present invention two；
Fig. 4 is that the embodiment of the present invention two creates the ROW read-only materialized view schematic diagram specifying snapshot rank for fs1；
Fig. 5 is the schematic diagram revising the file1 not being snapshotted protection in the embodiment of the present invention two；
Fig. 6 is the schematic diagram of the file2 that amendment is snapshotted protection in the embodiment of the present invention two；
Fig. 7 is the guard method flow chart of the storage data that the embodiment of the present invention three provides；
Fig. 8 is the schematic diagram creating multiple read-only materialized view in the embodiment of the present invention three；
Fig. 9 is the structural representation of a kind of protection device storing data that the embodiment of the present invention four provides；
Figure 10 is the structural representation of a kind of protection device storing data that the embodiment of the present invention five provides.
Detailed description of the invention
The present inventor finds in reduction read-only materialized view takies the research process in the too much space of FS,
In FS, not all file is all worth protecting with its read-only materialized view, if therefore controlling the read-only of FS
Snapshot optionally protects the vital document in FS, just can solve read-only materialized view take in a large number FS can with sky
Between problem, and then the FS business making way for critical path is as far as possible available.
In order to realize being controlled the protection object of read-only materialized view, the All Files of FS (is included by the present invention
Catalogue) increase an attribute: File Snapshot level attribute, this attribute can also be by user setup；For creating
The instruction of FS read-only materialized view increases an option: File Snapshot level attribute parameter, this FS of establishment is only
Read snapshot, by only protecting, FS is provided with the File Snapshot rank genus mated with this document snapshot level attribute parameter
The file of property, i.e. the value of this document snapshot level attribute is identical with the value of this document snapshot level attribute parameter；
System snapshot level attribute is increased newly for FS；Read-only materialized view level attribute is increased newly for read-only materialized view.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Embodiment one
The present embodiment provides a kind of guard method storing data, refers to Fig. 1, and method flow includes:
101, receiving attribute and arrange instruction, described attribute arranges instruction request and arranges the literary composition of file in file system
Part snapshot level attribute；
102, instruction is set according to described attribute and the File Snapshot level attribute of described file is set；
103, receiving snapshot and create instruction, described snapshot creates in instruction and carries the file needing document to be protected
Snapshot level attribute parameter;
104, creating instruction according to described snapshot and create read-only materialized view for described file system, described ROW is only
The read-only materialized view level attribute reading snapshot is arranged according to described File Snapshot level attribute parameter；
105, when specified file is modified, it is judged that the File Snapshot level attribute of described specified file with
Whether the read-only materialized view level attribute of the ROW read-only materialized view created mates, and coupling time according to described
Described specified file is write front protection by the ROW read-only materialized view created.
Concrete, described front protection of writing refers to that the data before revising described specified file are videoed or protect
Stay.
Further, described establishment according to described snapshot instructs as described file system establishment read-only materialized view, bag
Include:
Described ROW read-only materialized view is created by the way of sharing root with described file system；
The read-only materialized view level attribute of described ROW read-only materialized view is set according to described File Snapshot level attribute；
The system snapshot level attribute of described file system is set according to described read-only materialized view level attribute.
Concrete, the root of file system or read-only materialized view is a disk address, by this address, permissible
Have access to file system or all catalogues of ROW read-only materialized view, file data；Due to file system or read-only
The catalogue of snapshot, file are all abstracted into Objects(object one by one), all these Objects form
The Objset(object set of file system or read-only materialized view), Objset organizes in the form of a tree, and tree has an Objset
Root(tree root) address, all of file system/read-only materialized view can be had access to by this Objset Root
Objects, so file system or read-only materialized view root are again Objset Root.
By the way of sharing root with described file system, create described ROW read-only materialized view, refer to create
During ROW read-only materialized view, the root of ROW read-only materialized view is pointed to the root of file system.Read-only soon at ROW
According to when creating, owing to not yet modifying the file in file system, and ROW read-only materialized view is directly protected
FS writes front data (i.e. data before amendment), and therefore, now the root of ROW read-only materialized view points to file system
The root of system.
Further, described system snapshot level attribute and described read-only materialized view level attribute include [snapshot rank-
Logical time point] to set, wherein said snapshot rank represents the file that described ROW read-only materialized view is protected
Snapshot rank, logical time point represents the logical time point creating described ROW read-only materialized view；
Described read-only materialized view level attribute include [snapshot rank-logical time point] to set, wherein said soon
Represent that according to rank the snapshot rank needing document to be protected, described logical time point only represent the described ROW of establishment
Read the logical time point of snapshot.
Further, described snapshot creates instruction and also carries snapshot title；
Described is, after described file system creates read-only materialized view, also to include according to the establishment instruction of described snapshot:
According to ROW read-only materialized view described in described snapshot name nominating.
Further, described is after described file system creates read-only materialized view according to the establishment instruction of described snapshot,
Also include:
Receive the request accessing described ROW read-only materialized view；
The read-only materialized view level attribute of the value of output file snapshot level attribute and described ROW read-only materialized view
The file that the value of snapshot rank is equal.
Further, described when specified file is modified, it is judged that the File Snapshot of described specified file
Whether level attribute mates with the read-only materialized view level attribute of the ROW read-only materialized view created, and when coupling
According to the described ROW read-only materialized view created, described specified file is write front protection, including:
Receive the amendment data of specified file in described file system；
In the read-only materialized view of the described file system that judgement has created, if there is read-only materialized view level attribute
The read-only materialized view that the value of snapshot rank is equal with the value of the File Snapshot level attribute of described specified file；
If existing, retain the legacy data before the amendment of described specified file, and by the root of described ROW read-only materialized view
Point to the legacy data of described specified file；Otherwise, the legacy data before the amendment of described specified file is deleted.
The guard method of the storage data that the present embodiment provides, by increasing the File Snapshot level attribute of file,
This document snapshot level attribute is configured, different files can be arranged to different snapshot ranks,
Specify this ROW read-only materialized view to need document to be protected when system file is created ROW read-only materialized view simultaneously
Snapshot rank, thus allow ROW read-only materialized view only protect those to need vital documents to be protected, it is possible to allow use
Family participates in the control of ROW read-only materialized view, user go to determine which literary composition that this is FS according to application scenarios
Part creates snapshot, controls the use space of snapshot as far as possible, reduces the sky of the FS that ROW read-only materialized view takies
Between, make the FS being positioned at critical path can use as far as possible, the competitiveness of improving product.
Embodiment two
The present embodiment provides a kind of guard method storing data, and the method is carried out as a example by ROW read-only materialized view
Explanation.Referring to Fig. 2, method flow includes:
201, receive the request of user's input by the file 2(file2 in fs1) File Snapshot level attribute
Value is set to the attribute of 1 and arranges instruction.
Concrete, in fs1 file 1(file1), file2 be equipped with File Snapshot level attribute: sanpLevel.
The snapshot rank of sanpLevel: file, is defaulted as being not provided with (none).
202, instruction is set according to this attribute and the value of the File Snapshot level attribute of file2 is set to 1.
Concrete, arrange after having instructed the setting of the File Snapshot level attribute of file2 according to this attribute,
The snapshot level attribute schematic diagram of the file of fs1, refers to Fig. 3.
File system fs1 is provided with four attributes relevant to ROW read-only materialized view:
The previous snapshot of prevSnap(): point to the previous ROW read-only materialized view of FS；
Next snapshot of nextSnap(): point to the next ROW read-only materialized view of FS；
SnapLevels system snapshot rank: comprise one [key-value] to i.e. [snapshot rank-logical time point]
To set, key is the snapshot rank of read-only materialized view document to be protected, and value is to create the patrolling of read-only materialized view
Collect time point, be defaulted as [none] when not creating ROW read-only materialized view；
The root of FS Root(FS): point to the root of fs1 All Files data.
Owing to user selects the value of the File Snapshot level attribute of file2 is set to 1, therefore this step completes
The attribute of user arranges the sanpLevel=none of the sanpLevel=1, file1 of file2 after instruction.
203, the value for the only protection sanpLevel of the fs1 entitled snap1 of establishment receiving user's input is arranged
It it is the snapshot establishment instruction of the file of 1.
Concrete, this snapshot creates instruction can use following form:
Snapshot create fs1snap1snapLevel=1
Concrete, Snapshot create: represent and create snapshot；
Fs1: be represented to file system fs1 and create snapshot；
Snap1: the name of expression snapshot is snap1；
SnapLevel=1: represent only to being provided with the document creation snapshot that rank is 1 in file system, i.e. only
Protection File Snapshot level attribute value is the file of 1.
204, create instruction according to this snapshot and create the ROW read-only materialized view of entitled snap1.
Concrete, this step creates the ROW read-only materialized view of entitled snap1, and makes this snapshot share file system
The root of system.Create the ROW read-only materialized view schematic diagram specifying snapshot rank for fs1, refer to Fig. 4.
After establishment completes, the association attributes of fs1 and snap1 is provided that
The snapLevels of fs1 is provided with one key-value pair: " 1-10 ", represents that file system fs1 is being patrolled
Collecting time point is to create a file (i.e. table only protecting File Snapshot level attribute value to be 1 when of 10
Show and create the ROW read-only materialized view that snapshot rank is 1)；
The snapLevels of snap1 is provided with one key-value pair: " 1-10 ", represents and creates this snap1's
Logical time point is 10, and before its relay protective scheme time point 10, File Snapshot level attribute value is 1
File.
The prevSnap of fs1 points to snapshot snap1；The nextSnap of sanp1 points to fs1；
The root of direct shared-file system fs1 of root of the Snap Root snapshot of sanp1: FS Root.
Concrete, if now receiving user to access the request of snap1, will filter out with sanp1's
The unmatched file of snapLevels, and export the literary composition mated with the snapshot rank of described ROW read-only materialized view
Part, i.e. ROW read-only materialized view only exports the value of snapLevel and snapshot rank key of the snapLevels of self
The identical file of value.
205, the amendment data that file1 is modified are received；
206, according to the data of this amendment data modification file1, the new data of amended file1 is saved in
New Disk Locality；
207, judge snap1 snapLevels with file1 snapLevel with do not mate, delete file1
Legacy data.
Concrete, it is judged that whether the snapLevel of snapLevels with file1 of snap1 mates, main root
Value according to snapLevel is the most equal with the value of the key of snapLevels, if equal, judges both couplings,
Otherwise judge that both do not mate.In the present embodiment, the snapLevel value of file1 is none, snap1's
The key value of snapLevels is 1, and both do not mate.
Concrete, amendment is not snapshotted the schematic diagram of the file1 of protection, refers to Fig. 5, and in figure, " X " represents
Data are deleted.After amendment file1, it then follows ROW principle, the new data of file1 is always written into new magnetic
Dish position；And the legacy data of file1 is not protected by snap1 because of the snapLevel=none of file1, will be by
Directly delete；Now the root of fs1 points to new data and the data of file2 of file1, and the root of snap1 then refers to
To the data of file2.In this step, the legacy data of file1 is deleted, and will no longer take file system fs1
Free space, thus reduce ROW read-only materialized view and source FS free space is taken.
208, the amendment data that file2 is modified are received；
209, according to the data of this amendment data modification file2, the new data of amended file2 is saved in
New Disk Locality；
210, judge that the snapLeve of snapLevelsl with file2 of snap1 mates, retain the old number of file2
According to.
Concrete, amendment is snapshotted the schematic diagram of the file2 of protection, refers to Fig. 6.Follow ROW principle,
The new data of file2 is always written into new Disk Locality；And the legacy data of file2 is because of the snapLevel=1 of file2
And protected by snap1, will not be deleted.Now, the root of fs1 points to the new data of file1 and the new of file2
Data, the root of snap1 then points to the legacy data of file2.
Concrete, the executive agent of the present embodiment can be storage management system.
The guard method of the storage data that the present embodiment provides, adds file for the file in file system fast
According to level attribute, by user by File Snapshot level attribute is configured, different files is arranged to
Different snapshot ranks, user can specify when system file is created ROW read-only materialized view simultaneously needs to protect
, after modifying file, according to whether there is read-only materialized view level attribute in the snapshot rank of the file protected
The ROW read-only materialized view mated with the File Snapshot level attribute of the file being modified determines whether this document
Carry out snapshot protection, if there is then retaining the legacy data before this document is revised, otherwise delete this document amendment
Front legacy data, thus allow user participate in the control of ROW read-only materialized view, user go according to application scenarios
Determine which document creation snapshot that this is FS, control the use space of snapshot as far as possible, reduce read-only materialized view
The space of the FS taken, makes the FS being positioned at critical path can use as far as possible, the competitiveness of improving product.
Embodiment three
Present embodiments provide a kind of guard method storing data.In the present embodiment, file system fs1 comprises many
Individual file, filename is followed successively by file1, file2 ... file6, the File Snapshot level attribute acquiescence of the plurality of file
For snapLevel=none.Referring to Fig. 7, method flow includes:
701, receive user input by file f ile2 in file system fs1, the File Snapshot rank of file5
The value of attribute is set to the attribute of 1 and arranges instruction.
702, arrange instruction according to this attribute the File Snapshot level attribute of file2, file5 to be set to
snapLvel=1。
703, the snapshot carrying snapLevel=1 receiving user's input creates instruction, and this snapshot creates instruction
Require that creating a snapshot rank is 1, the ROW read-only materialized view of entitled sanp1.
704, when logical time point is 10, the ROW that snapshot rank is 1 creating entitled snap1 is read-only
Snapshot.
705, receive user input by file f ile3 in file system fs1, the File Snapshot rank of file4
The value of attribute is set to the attribute of 2 and arranges instruction.
706, arrange instruction according to this attribute the File Snapshot level attribute of file3, file4 to be set to
snapLevel=2。
707, the snapshot carrying snapLevel=2 receiving user's input creates instruction, and this snapshot creates instruction
Require that creating a snapshot rank is 2, the snapshot of entitled sanp2.
708, when logical time point is 20, the ROW that snapshot rank is 2 creating entitled snap2 is read-only
Snapshot.
Concrete, refer to Fig. 7, after having created, the system snapshot level attribute snapLevels note of fs1
Record is: [1-10,2-20], represents that creating a snapshot rank logical time point is 10 when is 1
Row read-only materialized view, creating a snapshot rank logical time point is 20 when is the Row of 2
Read-only materialized view；Read-only materialized view level attribute snaLevels of snap1 is recorded as: [1-10], represents that this is read-only soon
According to an only protection snapshot rank be the file of 1, the data before its relay protective scheme time point 10；Snap2's
Read-only materialized view level attribute snapLevels is recorded as: [2-20], represents the only protection snapshot level of this read-only materialized view
It is not the file of 2, the data before its relay protective scheme time point 20.Sanp1, sanp2 and fs1 share root.
And, file f ile1 of file system fs1, file6 are none due to its File Snapshot rank, will be the most any
ROW read-only materialized view is protected.
Concrete, during to the file of the access of snap1, snap2 and amendment fs1, the processing method to each file
It is identical with previous embodiment that here is omitted.
The guard method of the storage data that the present embodiment provides, adds file for the file in file system fast
According to level attribute, by user by File Snapshot level attribute is configured, different files is arranged to
Different snapshot ranks, user appointment can need to be protected when system file creates read-only materialized view simultaneously
The snapshot rank of file, therefore when modifying the file of file system, ROW read-only materialized view is only protected
The file that user specifies, will not carry out ROW read-only materialized view protection for unspecified file, it is possible to effectively
Save the space of file system.
Embodiment four
Seeing Fig. 9, present embodiments provide a kind of protection device storing data, this device includes:
Receiving unit 901, arrange instruction for attribute, described attribute arranges instruction request and arranges in file system
The File Snapshot level attribute of file；
Arranging unit 902, the attribute for receiving according to described reception unit 901 arranges instruction and arranges described literary composition
The File Snapshot level attribute of part；
Described reception unit 901, is additionally operable to receive snapshot and creates instruction, and described snapshot creates to carry in instruction and needs
The File Snapshot level attribute parameter of document to be protected;
Snapshot creating unit 903, the snapshot for receiving according to described reception unit 901 creates instruction for described
File system creates the ROW read-only materialized view specifying snapshot rank, according to described File Snapshot level attribute parameter
The read-only materialized view level attribute of described ROW read-only materialized view is set；
File protected location 904, for when modifying to specified file, it is judged that the literary composition of described specified file
Whether part snapshot level attribute mates with the read-only materialized view level attribute of the ROW read-only materialized view created, and
According to the described ROW read-only materialized view created, described specified file is write front protection during coupling.
Further, described snapshot creating unit 903 includes:
Creation module, read-only soon for creating described ROW by the way of sharing root with described file system
According to；
Module is set, after creating described ROW read-only materialized view in described creation module, according to described literary composition
Part snapshot level attribute arranges the read-only materialized view level attribute of described ROW read-only materialized view, and according to described
Read snapshot level attribute and the system snapshot level attribute of described file system is set.
Further, described logging modle, it is additionally operable to be recorded as described system snapshot level attribute including [soon
According to rank-logical time point] to set, wherein said snapshot rank represents that the described ROW of establishment is read-only soon
According to the snapshot rank of the snapshot rank of the file protected, logical time point represents the described ROW read-only materialized view of establishment
Logical time point；It is recorded as described read-only materialized view level attribute including that [snapshot rank-logical time point] is right
Set, wherein said snapshot rank represents the snapshot rank needing document to be protected, described logical time point
Represent the logical time point creating described ROW read-only materialized view.
Further, described reception unit 901, it is additionally operable to receive the snapshot establishment instruction carrying snapshot title；
Described creation module, is additionally operable to create in instruction according to the snapshot that described reception unit 901 receives carry
Snapshot name nominating described in ROW read-only materialized view.
Further, described reception unit 901, it is additionally operable to create described ROW in described snapshot creating unit
After read-only materialized view, receive the request accessing described ROW read-only materialized view；
Described device also includes:
Output unit, for output file snapshot level attribute value and described ROW read-only materialized view read-only soon
According to the file that the value of the snapshot rank in level attribute is equal.
Further, described reception unit 901, it is additionally operable to receive the amendment of specified file in described file system
Data；
Described device also includes:
Modified module, for specified file described in the amendment data modification according to the reception of described reception unit 901
Data, and the new data of amended described specified file is saved in new Disk Locality；
Judge module, for being saved in the new data of amended described specified file at described modified module
After new Disk Locality, it is judged that in the ROW read-only materialized view of the described file system created, if exist
The value phase of the value of the snapshot rank of read-only materialized view level attribute and the File Snapshot level attribute of described specified file
Deng ROW read-only materialized view；
Root module, for judging to deposit read-only materialized view level attribute and described specified file at described judge module
During the ROW read-only materialized view that File Snapshot level attribute matches, the root of described ROW read-only materialized view is pointed to
The legacy data of described specified file；
At described judge module, removing module, for judging that not depositing read-only materialized view level attribute specifies literary composition with described
During the ROW read-only materialized view that the File Snapshot level attribute of part matches, before deleting the amendment of described specified file
Legacy data.
The protection device of the present embodiment storage data, by increasing the File Snapshot level attribute of file, to this
File Snapshot level attribute is configured, and different files can be arranged to different snapshot ranks, simultaneously
This ROW read-only materialized view is specified to need the fast of document to be protected when system file is created ROW read-only materialized view
According to rank, thus ROW read-only materialized view is allowed only to protect those to need vital document to be protected.The most also
User can be allowed to participate in the control of ROW read-only materialized view, user go to determine that this is FS's according to application scenarios
Which document creation snapshot, controls the use space of snapshot as far as possible, reduces what ROW read-only materialized view took
The space of FS, makes the FS being positioned at critical path can use as far as possible, the competitiveness of improving product.
Embodiment five
Referring to Figure 10, present embodiments provide a kind of protection device storing data, this device includes:
Receiver 1001, is used for receiving attribute and arranges instruction, and described attribute arranges instruction request and arranges file system
The File Snapshot level attribute of file in system；
Processor 1002, the attribute for receiving according to described receiver arranges instruction and arranges the literary composition of described file
Part snapshot level attribute；
Described receiver 1001, is additionally operable to receive snapshot and creates instruction, and described snapshot creates to carry in instruction and needs
The File Snapshot level attribute parameter of document to be protected;
Described processor 1002, is additionally operable to create instruction for described according to the snapshot that described receiver 1001 receives
File system creates ROW read-only materialized view, arranges described ROW according to described File Snapshot level attribute parameter
The read-only materialized view level attribute of read-only materialized view；And for when specified file is modified, it is judged that described
The read-only materialized view level attribute of the File Snapshot level attribute of specified file and the ROW read-only materialized view created
Whether mate, and according to the described ROW read-only materialized view created, described specified file is write when coupling
Front protection.
Further, described processor 1002, it is additionally operable to by the way of sharing root with described file system create
Build described ROW read-only materialized view；According to described File Snapshot level attribute, described ROW read-only materialized view is set
Read-only materialized view level attribute, and the system of described file system is set according to described read-only materialized view level attribute
Snapshot level attribute.
Further, described processor 1002, it is additionally operable to be recorded as including by described system snapshot level attribute
[snapshot rank-logical time point] to set, wherein said snapshot rank represents that the described ROW of establishment is read-only
The snapshot rank of snapshot, logical time point represents the logical time point creating described ROW read-only materialized view；By institute
State read-only materialized view level attribute be recorded as including [snapshot rank-logical time point] to set, wherein said soon
Represent that according to rank the snapshot rank needing document to be protected, described logical time point only represent the described ROW of establishment
Read the logical time point of snapshot.
Further, described receiver, it is additionally operable to receive the snapshot establishment instruction carrying snapshot title；
Described processor, is additionally operable to the snapshot according to described receiver receives and creates the snapshot name carried in instruction
Claim to name described ROW read-only materialized view.
Further, described receiver 1001, it is additionally operable to only create described ROW at described processor 1002
After reading snapshot, receive the request accessing described ROW read-only materialized view；
Described device also includes:
Transmitter, the value of the request output file snapshot level attribute for receiving according to described receiver 1002
The file equal with the value of the snapshot rank in the read-only materialized view level attribute of described ROW read-only materialized view.
Further, described receiver 1001, it is additionally operable to receive specified file in described file system is entered
The amendment data of row amendment；
Described processor 1002, is additionally operable to described in the amendment data modification that receives according to described receiver specify literary composition
The data of part, and the new data of amended described specified file is saved in new Disk Locality；Judge
In the ROW read-only materialized view of the described file system created, if there is the snapshot level of read-only materialized view level attribute
The ROW read-only materialized view that other value is equal with the value of the File Snapshot level attribute of described specified file, if depositing
, then retain the legacy data before the amendment of described specified file, and the root of described ROW read-only materialized view is pointed to institute
Stating the legacy data of specified file, if not existing, then deleting the legacy data before the amendment of described specified file.
The protection device of the storage data that the present embodiment provides, by increasing the File Snapshot level attribute of file,
This document snapshot level attribute is configured, different files can be arranged to different snapshot ranks,
Specify this ROW read-only materialized view to need document to be protected when system file is created ROW read-only materialized view simultaneously
Snapshot rank, thus allow ROW read-only materialized view only protect those need vital documents to be protected, can effectively drop
The space of the FS that low ROW read-only materialized view takies, makes the FS being positioned at critical path can use as far as possible, promotes
The competitiveness of product.
In sum, the guard method of the storage data that the embodiment of the present invention provides and device, for file system
In file add File Snapshot level attribute, by File Snapshot level attribute is configured, will not
Same file is arranged to different snapshot ranks, and can be when system file is created ROW read-only materialized view
Specify the snapshot rank needing document to be protected, when file is modified, according to the file being modified
Whether whether File Snapshot level attribute mate with the read-only materialized view level attribute of the ROW read-only materialized view created
Determine whether this document is carried out snapshot protection, if coupling, retain the legacy data before this document amendment, no
Then delete the legacy data before this document amendment such that it is able to allow user participate in the control of ROW read-only materialized view,
Removed to determine, according to application scenarios, which document creation snapshot that this is FS by user, control making of snapshot as far as possible
With space, reduce the space of the FS that ROW read-only materialized view takies, make to be positioned at the FS of critical path as far as possible
Available, the competitiveness of improving product.
It should be understood that the protection device of the storage data of above-described embodiment offer, realizing storage number
According to protection time, be only illustrated with the division of above-mentioned each functional module, in actual application, Ke Yigen
According to needs, above-mentioned functions distribution is completed by different functional modules, will the internal structure of device be divided into
Different functional modules, to complete all or part of function described above.It addition, above-described embodiment carries
The protection device of the storage data of confession belongs to same design with the guard method enforcement of storage data, and it is specifically real
Existing process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be passed through
Hardware completes, it is also possible to instructing relevant hardware by program and complete, described program can be stored in
In a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or
CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (12)
1. the guard method storing data, it is characterised in that described method includes:
Receiving attribute and arrange instruction, described attribute arranges instruction request, and to arrange the file of file in file system fast
According to level attribute；
Instruction is set according to described attribute the File Snapshot level attribute of described file is set；
Receiving snapshot and create instruction, described snapshot creates in instruction and carries File Snapshot level attribute parameter, uses
Document to be protected is needed with the read-only materialized view that instruction creates；
Create when instruction creates and uses for described file system and write according to described snapshot and redirect ROW technology
ROW read-only materialized view, the read-only materialized view level attribute of described ROW read-only materialized view is according to described File Snapshot level
Other property parameters is arranged；
When specified file is modified, it is judged that the File Snapshot level attribute of described specified file with create
Whether the read-only materialized view level attribute of the ROW read-only materialized view built mates, and creates according to described when coupling
ROW read-only materialized view described specified file is write front protection.
Method the most according to claim 1, it is characterised in that described establishment according to described snapshot instructs
ROW read-only materialized view is created for described file system, including:
Described ROW read-only materialized view is created by the way of sharing root with described file system；
The read-only materialized view rank of described ROW read-only materialized view is set according to described File Snapshot level attribute parameter
Attribute；
The system snapshot level attribute of described file system is set according to described read-only materialized view level attribute.
Method the most according to claim 2, it is characterised in that
Described system snapshot level attribute includes the set of snapshot rank-logical time point pair, wherein said snapshot
Rank represents the snapshot rank of the file that described ROW read-only materialized view protects, and described logical time point represents establishment
The logical time point of described ROW read-only materialized view；
Described read-only materialized view level attribute includes the set of snapshot rank-logical time point pair, wherein said snapshot
Rank represents that the snapshot rank needing document to be protected, described logical time point represent that the described ROW of establishment is read-only
The logical time point of snapshot.
Method the most according to claim 1, it is characterised in that described snapshot creates instruction and also carries fast
According to title；
Described is, after described file system creates ROW read-only materialized view, also to wrap according to the establishment instruction of described snapshot
Include:
According to ROW read-only materialized view described in described snapshot name nominating.
Method the most according to claim 3, it is characterised in that described establishment according to described snapshot instructs
After creating ROW read-only materialized view for described file system, also include:
Receive the request accessing described ROW read-only materialized view；
The read-only materialized view level attribute of the value of output file snapshot level attribute and described ROW read-only materialized view
The file that the value of snapshot rank is equal.
Method the most according to claim 3, it is characterised in that described specified file is being modified
Time, it is judged that the File Snapshot level attribute of described specified file and the ROW read-only materialized view created read-only soon
Whether mate according to level attribute, and coupling time according to the described ROW read-only materialized view created to described appointment
File carries out writing front protection, including:
Receive the amendment data of described specified file；
According to the data of specified file described in described amendment data modification, and by amended described specified file
New data be saved in new Disk Locality；
In the ROW read-only materialized view of the described file system that judgement has created, if there is read-only materialized view rank and belong to
The ROW that the value of the snapshot rank of property is equal with the value of the File Snapshot level attribute of described specified file is read-only
Snapshot；
If existing, retain the legacy data before the amendment of described specified file, and by the root of described ROW read-only materialized view
Point to the legacy data of described specified file；Otherwise, the legacy data before the amendment of described specified file is deleted.
7. the protection device storing data, it is characterised in that including:
Receiving unit, be used for receiving attribute and arrange instruction, described attribute arranges instruction request and arranges file system
The File Snapshot level attribute of middle file, and be used for receiving snapshot establishment instruction, described snapshot creates instruction
In carry the File Snapshot level attribute parameter needing document to be protected；
Arranging unit, the attribute for receiving according to described reception unit arranges instruction and arranges the literary composition of described file
Part snapshot level attribute；
Snapshot creating unit, the snapshot for receiving according to described reception unit creates instruction for described file system
System creates ROW read-only materialized view, arranges described ROW according to described File Snapshot level attribute parameter read-only soon
According to read-only materialized view level attribute；
File protected location, for when modifying to specified file, it is judged that the file of described specified file
Whether snapshot level attribute mates with the read-only materialized view level attribute of the ROW read-only materialized view created, and
Described specified file is write front protection according to the described ROW read-only materialized view created by timing.
Device the most according to claim 7, it is characterised in that described snapshot creating unit includes:
Creation module, read-only soon for creating described ROW by the way of sharing root with described file system
According to；
Module is set, after creating described ROW read-only materialized view in described creation module, according to described literary composition
Part snapshot level attribute arranges the read-only materialized view level attribute of described ROW read-only materialized view, and according to described
Read snapshot level attribute and the system snapshot level attribute of described file system is set.
Device the most according to claim 8, it is characterised in that described arrange module, is additionally operable to institute
State system snapshot level attribute and be recorded as including the set of snapshot rank-logical time point pair, wherein said snapshot
Rank represents the snapshot rank of snapshot rank of the file of the described ROW read-only materialized view protection of establishment, described in patrol
Collect time point and represent the logical time point creating described ROW read-only materialized view；By described read-only materialized view level attribute
It is recorded as including that the set of snapshot rank-logical time point pair, wherein said snapshot rank represent that need are to be protected
The snapshot rank of file, described logical time point represents the logical time point creating described ROW read-only materialized view.
Device the most according to claim 7, it is characterised in that
Described reception unit, is additionally operable to receive the snapshot establishment instruction carrying snapshot title；
Described device also includes:
Creation module, creates, for the snapshot received according to described reception unit, the snapshot title carried in instruction
Name described ROW read-only materialized view.
11. devices according to claim 9, it is characterised in that
Described reception unit, is additionally operable to after described snapshot creating unit creates described ROW read-only materialized view,
Receive the request accessing described ROW read-only materialized view；
Described device also includes:
Output unit, the value of the request output file snapshot level attribute for receiving according to described reception unit
The file equal with the value of the snapshot rank in the read-only materialized view level attribute of described ROW read-only materialized view.
12. according to the device described in any one of claim 7 to 11, it is characterised in that
Described reception unit, is additionally operable to receive the amendment data of specified file in described file system；
Described file protected location also includes:
Modified module, revises the number of specified file described in data modification for receive according to described reception unit
According to, and the new data of amended described specified file is saved in new Disk Locality；
Judge module, for being saved in the new data of amended described specified file at described modified module
After new Disk Locality, it is judged that in the ROW read-only materialized view of the described file system created, if exist
The value phase of the value of the snapshot rank of read-only materialized view level attribute and the File Snapshot level attribute of described specified file
Deng ROW read-only materialized view；
Root module, for judging to there is read-only materialized view level attribute and described specified file at described judge module
File Snapshot level attribute match ROW read-only materialized view time, the root of described ROW read-only materialized view is referred to
Legacy data to described specified file；
Removing module, for judging to there is not read-only materialized view level attribute and described appointment at described judge module
During the ROW read-only materialized view that the File Snapshot level attribute of file matches, before deleting the amendment of described specified file
Legacy data.
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| CN201310744238.0A CN103729265B (en) | 2013-12-30 | 2013-12-30 | A kind of guard method storing data and device |
| PCT/CN2014/088940 WO2015101083A1 (en) | 2013-12-30 | 2014-10-20 | Method and device for protecting stored data |
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| CN103729265B (en) * | 2013-12-30 | 2017-01-04 | 华为技术有限公司 | A kind of guard method storing data and device |
| CN109032507B (en) * | 2018-06-28 | 2021-11-19 | 郑州云海信息技术有限公司 | Method, system and related assembly for generating source volume storage snapshot |
| CN208638229U (en) * | 2018-08-03 | 2019-03-22 | 瑞声科技(新加坡)有限公司 | Vibrating motor |
| CN110888779B (en) * | 2019-11-18 | 2023-07-07 | 上海新炬网络信息技术股份有限公司 | File system read-only judging method based on analog writing |
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| CN101183383A (en) * | 2007-12-17 | 2008-05-21 | 中国科学院计算技术研究所 | Snapshot system and method of use thereof |
| CN101246458A (en) * | 2008-02-29 | 2008-08-20 | 中国科学院计算技术研究所 | Hard disk data protection method and system |
| CN103473277A (en) * | 2013-08-27 | 2013-12-25 | 华为技术有限公司 | Snapshot method and device for file systems |
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| US7010553B2 (en) * | 2002-03-19 | 2006-03-07 | Network Appliance, Inc. | System and method for redirecting access to a remote mirrored snapshot |
| KR100439675B1 (en) * | 2002-10-24 | 2004-07-14 | 한국전자통신연구원 | An efficient snapshot technique for shated large storage |
| CN101661415B (en) * | 2009-09-21 | 2012-07-11 | 中兴通讯股份有限公司 | Method for memorizing snapshot data and system for memorizing snapshot |
| CN103729265B (en) * | 2013-12-30 | 2017-01-04 | 华为技术有限公司 | A kind of guard method storing data and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183383A (en) * | 2007-12-17 | 2008-05-21 | 中国科学院计算技术研究所 | Snapshot system and method of use thereof |
| CN101246458A (en) * | 2008-02-29 | 2008-08-20 | 中国科学院计算技术研究所 | Hard disk data protection method and system |
| CN103473277A (en) * | 2013-08-27 | 2013-12-25 | 华为技术有限公司 | Snapshot method and device for file systems |
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