CN102096616A - Logical object data duplication method and related device - Google Patents
Logical object data duplication method and related device Download PDFInfo
- Publication number
- CN102096616A CN102096616A CN 201110039365 CN201110039365A CN102096616A CN 102096616 A CN102096616 A CN 102096616A CN 201110039365 CN201110039365 CN 201110039365 CN 201110039365 A CN201110039365 A CN 201110039365A CN 102096616 A CN102096616 A CN 102096616A
- Authority
- CN
- China
- Prior art keywords
- data block
- object logic
- bitmap
- copied
- source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a logical object data duplication method and a related device, which are used for reducing storage resources consumed when performing logical unit number duplication. The method comprises the following steps of: acquiring a difference bitmap, wherein the difference bitmap is used for storing corresponding state information that whether each data block in a source logical object is duplicated to a target logical object; monitoring whether a write request for modifying the data block in the source logical object is received; and if the monitoring result is that the write request is not received, determining the data block, not duplicated to the target logical object, in the source logical object according to the difference bitmap, duplicating the data block to the target logical object, and updating the state information of the data block in the difference bitmap.
Description
Technical field
The present invention relates to technical field of memory, relate in particular to a kind of clone method of object logic data and a kind of reproducing unit of object logic data.
Background technology
For the ease of more and more equipments or object are managed, prior art has proposed the notion of logical unit number (LUN, Logical Unit Number).Storage system is distributed a logical block sign (LUN ID) for each object that need be described, to expand original target identification (Target ID) that only can be described to the equipment that articulates on small computer system interface (SCSI, the Small Computer System Interface) bus.LUN ID is not equal to entity device, and the object of its description both can be equipment such as magnetic tape station, can be virtual objects such as disk space yet.
A typical LUN ID is applied as: the disk space of disk array is divided into several little storage resource cells (being disc driver), each little storage resource cells can be used as an object logic (LUN Device or abbreviate LUN as), and be that each little storage resource cells is distributed a LUNID, for example LUN0, LUN1, LUN2 etc.Object logic is the minimum memory object that operating system can be discerned.
The LUN reproduction technology is meant that the data with source object logic in the memory device copy in the target logic object, and wherein source object logic and target logic object lay respectively in the different storage device, or even in the constructed memory device of dissimilar disk array.The data trnascription of certain time point on the object logic can be saved in other a plurality of object logics by this technology, thus the purpose of realization data backup or data migtation.
The inventor finds in process of the present invention, there is following at least problem in prior art: existing LUN reproduction technology based on the snapshot mode will take certain storage resources carry out need setting up when LUN duplicates a snapped volume that is used to store the data trnascription of certain time of source object logic in the disk array at object logic place, source.
Summary of the invention
The embodiment of the invention provides a kind of clone method of object logic data, carries out the storage resources that expends when LUN duplicates in order to minimizing.
Accordingly, the embodiment of the invention also provides a kind of reproducing unit of object logic data.
The technical scheme that the embodiment of the invention provides is as follows:
A kind of clone method of object logic data comprises:
Obtain the difference bitmap, described difference bitmap is used for storing source object logic data block and whether has been copied to status information in the purpose object logic;
Whether monitoring receives the write request of data block in the object logic of modification source;
If monitored results is not receive write request, then determine not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap, described block copy in the purpose object logic, and is upgraded the status information of this data block in the difference bitmap.
A kind of reproducing unit of object logic data comprises:
Acquiring unit is used to obtain the difference bitmap, and described difference bitmap is used for storing source object logic data block and whether has been copied to status information in the purpose object logic;
Monitoring unit is used for after acquiring unit obtains the difference bitmap, and whether monitoring receives the write request of data block in the object logic of modification source;
First judging unit is used for monitoring out when not receiving write request at monitoring unit, determines not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap;
Copied cells, the block copy that is used for first judging unit is determined is to the purpose object logic;
First updating block, be used for copied cells with block copy behind the purpose object logic, upgrade the status information of this data block in the difference bitmap.
The technical scheme that the embodiment of the invention provides is at first obtained the difference bitmap that whether has been copied to the status information in the purpose object logic that is used for storing each data block correspondence of source object logic, in not receiving modification source object logic during the write request of data block, determine not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap, after described block copy is in the purpose object logic, upgrade in the difference bitmap status information with this data block, thereby can carry out need not to set up snapped volume, conserve memory resource when LUN duplicates; The embodiment of the invention also provides a kind of processing scheme when receiving write request in reproduction process in addition, can reduce the read-write operation number of times, saves and handles resource.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The principle schematic of the scheme that Fig. 1 duplicates for existing techniques in realizing LUN;
Fig. 2 is that prior art is at the processing procedure synoptic diagram that carries out receiving when LUN duplicates write request;
Fig. 3 is the main realization principle flow chart of the embodiment of the invention;
The schematic flow sheet of the preferred embodiment that Fig. 4 provides for the embodiment of the invention;
The embodiment of the invention difference bitmap that provides and the synoptic diagram that changes bitmap are provided Fig. 5 a;
Fig. 5 b is the synoptic diagram of a LUN reproduction process in the embodiment of the invention;
Fig. 5 c is the synoptic diagram of handling difference bitmap after first write request in the embodiment of the invention and changing bitmap;
Fig. 5 d is the synoptic diagram of handling difference bitmap after second write request in the embodiment of the invention and changing bitmap;
Fig. 5 e is that this LUN duplicates the synoptic diagram that finishes back difference bitmap and change bitmap in the embodiment of the invention;
Fig. 5 f is the synoptic diagram that in the embodiment of the invention data in the source object logic is copied in a plurality of target logic objects;
The structural representation of the reproducing unit of the object logic data that Fig. 6 provides for the embodiment of the invention;
The structural representation of acquiring unit in the reproducing unit of the object logic data that Fig. 7 provides for the embodiment of the invention.
Embodiment
Accompanying drawing 1 is for to realize the principle schematic that LUN duplicates based on the snapshot mode at present.Wherein, the source object logic is for being arranged in the source book (P-Vol, Primary Volume) of main array (Primary Site), the target logic object for be arranged in from array (Secondary Site) from volume (S-Vol, Secondary Volume).The basic procedure that LUN duplicates is: when preparing to begin to carry out LUN and duplicate, on main array, create a snapped volume (SnapVol), in whole LUN reproduction process, can continue source book is carried out the operation of modification data such as write operation, provide the data trnascription of source book in certain time by snapped volume; By main array with from the communication link between the array, the data trnascription of preserving on the snapped volume is copied to from volume, thereby finish LUN reproduction process successively then.
LUN reproduction technology based on snapshot all will be created snapped volume at every turn on main array when the data of source book being duplicated, need take storage resources.In addition, please refer to shown in the accompanying drawing 2, if in reproduction process, main frame sends the write request that is used for the data block of master file is carried out write operation to main array, then needs to carry out following processing: (1) reads the content (COWRead1) before this data block is revised according to write request in the master file; (2) content that reads is write snapped volume (COW Write2); (3) main frame writes fresh content (Vol Write3) in this data block in master file; (4) from snapped volume, read the preceding content (LunCopy Read1) of modification; (5) content before the modification that will read from snapped volume writes S-Vol (LunCopy Write2).Wherein, no sequencing relation between step (3) and the step (4) (5).As seen on the main array except in the data block of write request correspondence, writing fresh content, promptly revise outside the data block of write request correspondence, also need to carry out 2 write operations and 2 read operations.Because repeatedly read-write operation can expend the system handles resource, therefore using the snapshot mode to carry out in the process that LUN duplicates, within a short period of time is when carrying out repeatedly write operation to master file, response delay can increase fast, source book is being carried out also can reduce concurrent number of read-write operation and bandwidth when repeatedly LUN duplicates.
The embodiment of the invention proposes to store by the bitmap mode the status information in the purpose object logic of whether being copied to of each data block correspondence in the object logic of source, rather than preserve the data trnascription of source object logic by snapped volume, save the step of setting up snapped volume, thereby saved storage space.In order in reproduction process, to carry out write operation to the source object logic, the embodiment of the invention and then proposition come in the difference storage replication process by two bitmaps, the status information that whether is modified that whether has been copied to each the data block correspondence in the object logic of source in status information in the purpose object logic and the reproduction process of each data block correspondence in the object logic of source, according to these two bitmaps directly with the block copy in the object logic of source in the purpose object logic, avoided snapped volume is carried out repeatedly read-write operation, reduced and handled load.
Be explained in detail to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
As shown in Figure 3, the main realization principle process of the embodiment of the invention is as follows:
The concrete storage mode of difference bitmap includes but not limited to following several:
Mode one: in the difference bitmap, only store the sign that does not copy to the data block the purpose object logic as yet, do not store the sign that copies to the data block the purpose object logic from the source object logic from the source object logic; In step 50, after data block has been copied to the purpose object logic, in the difference bitmap, the state of this data block correspondence is updated to and is copied in the purpose object logic, be specially: the sign of this data block of deletion in the difference bitmap;
Mode two: first status indicator that does not copy to the data block the purpose object logic as yet from the source object logic is set in the difference bitmap, and second status indicator that copies to the data block the purpose object logic from the source object logic, it is that 1, the second status indicator is 0 that first status indicator for example is set; In step 50, after data block has been copied to the purpose object logic, in the difference bitmap state of this data block correspondence is updated to and is copied in the purpose object logic, be specially: first status indicator with this data block in the difference bitmap is updated to second status indicator.
Consider that process that the LUN that in the practical application same source object logic copied to same purpose object logic duplicates is normally carried out repeatedly, when revising for the data block in the source object logic between twice reproduction process, this unmodified data block of repeat replication no longer, and can be supported in the write operation that in the reproduction process source object logic is carried out, on the basis of scheme shown in the accompanying drawing 3, can also carry out following improvement:
At first, increase the variation bitmap of the status information whether each data block be used for storage replication process source object logic be modified;
With the difference bitmap similarly, the concrete storage mode that changes bitmap includes but not limited to following several:
Mode one: the sign of the data block in the source object logic that in changing bitmap, only is modified in the storage replication process, the not sign of the data block in the source object logic that is not modified in the storage replication process; In changing bitmap with the state information updating of data block for being modified, be specially: the sign of the data block that in changing bitmap, comprises in the increase write request;
Mode two: the third state sign that the data block in the source object logic that is modified in the reproduction process is set in changing bitmap, the four condition sign of the data block in the source object logic that is not modified in the reproduction process is set, for example the third state can be set during actual storage and be designated 1, four condition is designated 0, in changing bitmap with the state information updating of data block for being modified, be specially: in changing bitmap, the status indicator of this data block is updated to the third state and identifies.
Secondly, in the flow process shown in the accompanying drawing 3, when monitoring receives write request, the status information whether data block that will revise according to this write request in this moment difference bitmap has been copied in the purpose object logic is carried out different treatment schemees, and upgrades the status information whether data block that this write request revises is modified in changing bitmap.
Accompanying drawing 4 has provided the process flow diagram of the processing procedure that improved LUN duplicates, in this embodiment, and difference bitmap and change bitmap and all adopt storage mode in the mode one separately:
Whether step 400 is according to existing variation bitmap and difference bitmap to determine whether if enter step 401, otherwise to enter step 402 for first same source object logic being copied to same purpose object logic;
Concrete, when not having variation bitmap and difference bitmap, be defined as first same source object logic being copied to same purpose object logic; Otherwise, when having variation bitmap and difference bitmap, determine not to be first same source object logic to be copied in the same purpose object logic.
Step 401 is created the difference bitmap and is changed bitmap, and alternatively, content creating is empty difference bitmap and changes bitmap, enters step 403;
When the difference bitmap adopted the storage mode of mode one, the state of each data block correspondence was set to not be copied to and is specially the sign that increases each data block in the object logic of source in the difference bitmap that step 401 is created in the purpose object logic in the object logic of source.
Step 402, the status information in the variation bitmap when a preceding LUN is duplicated end enters step 404 as the status information of this difference bitmap that duplicates;
The mode that can duplicate by data is for example duplicated last LUN in the storage space of the difference bitmap that the content replication that changes bitmap when finishing duplicates to this; Alternatively, after the content of content as this difference bitmap that duplicates of the variation bitmap when a preceding LUN is duplicated end, also do not begin under the situation of reproduction process, to change in the bitmap in the object logic of source the state information updating of each data block correspondence for not being modified, when the storage mode in the employing mode one, be specially and empty the variation bitmap, can reduce the repeated workload in LUN reproduction process next time like this, only promptly duplicate next time and the block copy of being revised by write request in the source object logic in this reproduction process need be got final product in the target logic object.
Step 404 according to the difference bitmap, determines whether there is the data block that is not copied in the purpose object logic in the object logic of source, if enter step 405, otherwise processing finishes;
When the difference bitmap adopted storage mode in the mode one, if the content of difference bitmap is a sky, then there was not the data block that is not copied in the purpose object logic for whether the content of judging the difference bitmap is empty in this step; If the content of difference bitmap and be empty, then existence is not copied to the data block in the purpose object logic.
Step 407 in the purpose object logic, enters step 408 and step 409 with the block copy of the sign correspondence of the data block that comprises in this write request in the object logic of source;
Step 408 is updated to the state of the data block of the sign correspondence of the data block that comprises in this write request in the difference bitmap and is copied in the purpose object logic;
When the dystopy of being on duty figure adopts storage mode in the mode one, the sign of the data block that in the difference bitmap, comprises in this write request of deletion;
Step 409 is revised the data block of the sign correspondence of the data block that comprises in this write request according to this write request, enters step 410;
When the storage mode in the variation bitmap employing mode one, in changing bitmap, increase the sign of the data block that comprises in this write request;
Step 408 and step 410 are returned step 404 after finishing;
Step 411 according to the difference bitmap, in the purpose object logic, and enters step 412 with the block copy that is not copied to the purpose object logic in the object logic of source;
Step 412 is updated to the state of this data block in the difference bitmap and is copied in the purpose object logic, enters step 404;
When the dystopy of being on duty figure adopts storage mode in the mode one, the sign of this data block of deletion in the difference bitmap.
Block copy in the source logic of all data block sign correspondences that write down in the difference bitmap is arrived after the target logic object, preserves the content that changes bitmap, and this LUN duplicates end, waits for that LUN duplicates next time.
Need to prove that two treatment schemees that first treatment scheme that step 405, step 411 and step 412 constitute, step 405-step 410 constitute when not receiving write request, are carried out first treatment scheme, when receiving write request, carry out second treatment scheme.
Adopt scheme that accompanying drawing 4 provides when repeated multiple times copies to same source object logic same purpose object logic, need not when duplicating, all to set up snapped volume at every turn, thereby saved storage resources and handled resource; In addition, in a reproduction process, in receiving modification source object logic during the write request of data block, if according to the difference bitmap, determine that data block that write request will be revised (for example has been copied in the purpose object logic, the data block that this write request will be revised should be copied in this duplicates in the target logic object, and be copied in the target logic object, perhaps the data block that will revise of this write request need not to copy in the target logic object in this duplicates), the operation that needs this moment so to carry out only is the sign of the data block that the record write request will be revised in changing bitmap when revising data block corresponding in the target logic object of source according to write request, can not cause read-write operation, thereby save the processing resource snapped volume; Even the data block that write request will be revised (for example is not copied in the purpose object logic as yet, the data block that this write request will be revised should be copied in this duplicates in the target logic object, but receiving this write request fashion is not copied in the target logic object) situation under, also only need to carry out again the processing of block copy in the target logic object before once write request being revised, compared with prior art also can save a read operation and the write operation that to carry out snapped volume at least, can save the processing resource equally.
To introduce an embodiment in detail and come the main realization principle of the inventive method is explained in detail and illustrates according to foregoing invention principle of the present invention below.
Accompanying drawing 5a is difference bitmap A and the structural representation that changes bitmap B, and supposing all has 16 data blocks in source object logic and the purpose object logic, and the sign of data block is respectively 0～15.For intuitively for simplicity, the sign of each data block is corresponding difference bitmap A and change little lattice among the bitmap B respectively, and the numeral in the little lattice is corresponding data block sign.If little lattice are wherein filled by shade, when then showing the storage mode in the employing mode one, store the sign of the data block of this little lattice correspondence among difference bitmap A or the variation bitmap B.
Accompanying drawing 5b when repeated multiple times is copied to same purpose object logic with same source object logic, the synoptic diagram of a LUN reproduction process wherein.On behalf of the data block of its corresponding sign, the little lattice of being filled by shade among the difference bitmap A do not copy to the purpose object logic from the source object logic as yet; On behalf of the data block of its corresponding sign, the little lattice of being filled by shade copy to the purpose object logic from the source object logic.The data block of little lattice representative corresponding sign in this reproduction process of being filled by shade among the variation bitmap B that this duplicates is revised by write request.Certainly when reality is implemented, during storage mode in the difference bitmap use-pattern one, bitmap A can be for storing the sign that does not copy to the data block the purpose object logic as yet from the source object logic in the mode of array; Perhaps during the storage mode in the difference bitmap use-pattern two, bitmap A can store the status indicator of 16 data blocks with 2 byte 16bit, store the status indicator of a corresponding data block with each bit wherein, illustrate that when the bit position of a data block correspondence is put 1 this data block does not copy to the purpose object logic from the source object logic as yet, quilt is put illustrated that this data block copied to the purpose object logic from the source object logic at 0 o'clock.The embodiment of bitmap B is also similar, enumerates the difference bitmap here no longer one by one and changes all possible embodiment of bitmap.
Supposing that this duplicates is not first this source object logic to be copied to this purpose object logic, therefore in the difference bitmap that the variation bitmap content replication in the time of will precedingly once duplicating end is duplicated to this, before once duplicate variation bitmap when finishing shown in the variation bitmap B ' among the accompanying drawing 5b, the difference bitmap that this duplicates is shown in the difference bitmap A among the accompanying drawing 5b, be that this begins LUN when duplicating, sign is respectively 0,11,12,15 data block and also is not copied in the purpose object logic in the object logic of source.The status information of each data block correspondence is for not being modified, shown in the variation bitmap B among the accompanying drawing 5b in the variation bitmap that this duplicates.
After beginning to duplicate, whether the storage system at object logic place, source receives write request with the read-write cycle monitoring of setting, suppose that first read-write cycle receives the data block that comprises and is designated 4, be used for revising first write request that the source object logic is designated 4 data block, judge according to the difference bitmap and not finish the data block of duplicating as yet and do not comprise and be designated 4 data block, it then is 4 data block according to the first write request modified logo, and the state that data block is designated 4 data block in changing bitmap is set to be modified, this moment difference bitmap A and change bitmap B shown in accompanying drawing 5c.As seen, need not in this duplicates, to copy under the situation of target logic object in the data block that write request will be revised, only need get final product, saved the required read-write operation of purpose object logic is arrived in the block copy in the object logic of source according to the data block that write request is revised the source object logic.
Suppose that second read-write cycle receives the data block that comprises and be designated 11, be used for modified logo and be second write request of 11 data block, judge not finish as yet to comprise in the data block of duplicating according to the difference bitmap and be designated 11 data block, then at first will be designated 11 block copy in the target logic object, the state that data block is designated 11 data block in the difference bitmap A that this duplicates is set to be copied in the purpose object logic again, revise in the object logic of source according to second write request then and be designated 11 data block, and the state that data block is designated 11 data block in changing bitmap is set to be modified, this moment difference bitmap A and change bitmap B shown in accompanying drawing 5d.
Suppose in the subsequent reads write cycle time, not receive other write request,, promptly be designated 0,12,15 block copy in the target logic object then with the corresponding data block of each data block sign that comprises among the difference bitmap A among the accompanying drawing 5d.
This LUN duplicates when finishing, and difference bitmap and variation bitmap are shown in accompanying drawing 5e.
When carrying out that LUN duplicates next time, the variation bitmap among the accompanying drawing 5e as the difference bitmap that duplicates next time, is carried out same treatment step, here repeat no more.
In the specific implementation, can be respectively come the store discrepancy bitmap and change bitmap with the storage space of two appointments, when repeated multiple times copies to same source object logic same purpose object logic, duplicate each time when initial, preceding memory address of once duplicating the variation bitmap when finishing is duplicated the memory address of the difference bitmap when initial as this, and the memory address of the difference bitmap in the time of will precedingly once duplicating end is again duplicated the memory address of the variation bitmap when initial as this.
Accompanying drawing 3, accompanying drawing 4 and accompanying drawing 5a～accompanying drawing 5e are to be example with a target logic object, introduce data copy solution that the embodiment of the invention provides, this scheme is equally applicable to the scene that the data with in the source object logic shown in the accompanying drawing 5f copy to a plurality of target logic objects, source object logic and target logic object can be arranged in the same memory device, also can be arranged in the different memory devices, under these scenes, being respectively every pair of source object logic and target logic object is provided with the difference bitmap and changes bitmap, for every pair of source object logic and target logic object, concrete reproduction process and accompanying drawing 3, accompanying drawing 4 and the scheme that accompanying drawing 5a～accompanying drawing 5e provides are similar, here give unnecessary details no longer one by one.
Correspondingly, the embodiment of the invention also provides a kind of reproducing unit of object logic data, and as shown in Figure 6, this device comprises acquiring unit 601, monitoring unit 602, first judging unit 603, copied cells 604, first updating block 605, and is specific as follows:
Acquiring unit 601 is used to obtain the difference bitmap, and described difference bitmap is used for storing source object logic data block and whether has been copied to status information in the purpose object logic;
Monitoring unit 602 is used for after acquiring unit 601 obtains the difference bitmap, and whether monitoring receives the write request of data block in the object logic of modification source;
First judging unit 603, being used in monitoring unit 602 monitored results is when not receiving write request, determines not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap;
Copied cells 604 is used for first judging unit 603 is determined block copy to the purpose object logic;
First updating block 605, be used for copied cells 604 with block copy behind the purpose object logic, upgrade the status information of this data block in the difference bitmap.
Alternatively, the reproducing unit of accompanying drawing 6 also comprises second judging unit 606, first trigger element 607, second trigger element 608, revises unit 609, second updating block 610, and is specific as follows:
Second judging unit 606, being used in monitoring unit 602 monitored results is when receiving write request, according to the difference bitmap, determines whether the corresponding data block of data block sign that comprises in this write request has been copied in the purpose object logic;
First trigger element 607, be used for if second judging unit 606 is determined the corresponding data block of data block sign that this write request comprises not to be copied in the purpose object logic, trigger copied cells 604 with the block copy of the sign correspondence of the data block that comprises in this write request in the purpose object logic;
Second trigger element 608, be used for after the block copy of sign correspondence that first trigger element 607 triggers the data block that copied cellses 604 comprise this write request is in the purpose object logic, trigger first updating block 605 with the state information updating of this data block in the difference bitmap for being copied in the purpose object logic;
Revise unit 609, be used for if second judging unit 606 determine the corresponding data block of data block sign that this write request comprises be copied in the purpose object logic or second trigger element 608 triggered first updating block 605 with the state information updating of this data block in the difference bitmap for being copied in the purpose object logic, revise the data block of the sign correspondence of the data block that comprises in this write request according to write request;
Second updating block 610, be used for after revising unit 609 modification data blocks, to change in the bitmap state information updating with this data block for being modified, described variation bitmap is used for the status information whether data block in the object logic of storage replication process source is modified.
Alternatively, please refer to accompanying drawing 7, the acquiring unit 601 in the accompanying drawing 6 specifically comprises:
Judging unit 701 is used for determining that this duplicates whether for first the source object logic being copied to the purpose object logic;
First determines subelement 702, being used for determining in judgment sub-unit 701 that this duplicates not is when just the source object logic copies to the purpose object logic first, with the preceding status information that changes when finishing in the bitmap of once duplicating as the status information in this difference bitmap that duplicates;
Create subelement 703, be used for determining this in judgment sub-unit 701 and copy as when first the source object logic being copied to the purpose object logic, content creating be empty difference bitmap and variation bitmap;
Second determines subelement 704, and the status information that is used for creating the source object logic data block of the difference bitmap that subelement 703 creates is set to not be copied in the purpose object logic.
The function of the reproducing unit of the object logic data shown in accompanying drawing 6, the accompanying drawing 7 can be integrated in the memory device at object logic place, source, also can be arranged in the autonomous device that is connected with the memory device at object logic place, source.
Need to prove: introduce data copy method though the embodiment of the invention is example with the object logic, but the scope of application of this method not merely is object logic, can also be applicable to other memory devices, for example the data reproduction process between the disk array.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, this program can be stored in the computer read/write memory medium, as: ROM/RAM, magnetic disc, CD etc.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the clone method of object logic data is characterized in that, comprising:
Obtain the difference bitmap, described difference bitmap is used for storing source object logic data block and whether has been copied to status information in the purpose object logic;
Whether monitoring receives the write request of data block in the object logic of modification source;
If monitored results is not receive write request, then determine not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap, described block copy in the purpose object logic, and is upgraded the status information of this data block in the difference bitmap.
2. the method for claim 1 is characterized in that, also comprises:
If monitored results is to receive write request, then:
According to the difference bitmap, determine whether the corresponding data block of data block sign that comprises in this write request has been copied in the purpose object logic;
If the corresponding data block of the data block that comprises in this write request sign is not copied in the purpose object logic, with the block copy of the sign correspondence of the data block that comprises in this write request in the purpose object logic, with the state information updating of this data block in the difference bitmap for being copied in the purpose object logic;
Revise the data block of the sign correspondence of the data block that comprises in this write request according to this write request, for being modified, described variation bitmap is used for the status information whether data block in the object logic of storage replication process source is modified with the state information updating that changes this data block in the bitmap.
3. method as claimed in claim 2 is characterized in that, obtains the difference bitmap, specifically comprises:
Determine that whether this duplicate to first the source object logic being copied to the purpose object logic, and
Determining that this duplicates not is when first the source object logic being copied to the purpose object logic, with preceding status information of once duplicating the status information that changes when finishing in the bitmap as this difference bitmap that duplicates.
4. method as claimed in claim 3 is characterized in that, with preceding once duplicate change when finishing bitmap in the status information of status information as this difference bitmap that duplicates after, also comprise:
To change in the bitmap in the object logic of source the state information updating of data block for not being modified.
5. method as claimed in claim 3 is characterized in that, determines this and copies as when first the source object logic being copied to the purpose object logic, also comprises:
Content creating is empty difference bitmap and changes bitmap;
The status information of each data block is set to not be copied in the purpose object logic in the source object logic in the difference bitmap.
6. as arbitrary described method in the claim 2 to 5, it is characterized in that, in the described difference bitmap in the storage source object logic each data block whether be copied to the mode of the status information in the purpose object logic, comprising:
Storage does not copy to the sign of the data block the purpose object logic as yet in the difference bitmap from the source object logic, does not store the sign that copies to the data block the purpose object logic from the source object logic; Described state information updating with this data block in the difference bitmap is specially for being copied in the purpose object logic: the sign of this data block of deletion in the difference bitmap, perhaps
The status information that does not copy to the data block the purpose object logic from the source object logic in the difference bitmap is set to first status indicator, and the status information that has copied to the data block the purpose object logic from the source object logic is set to second status indicator; Described state information updating with this data block in the difference bitmap is specially for being copied in the purpose object logic: the status indicator of this data block in the difference bitmap is updated to second status indicator.
7. as arbitrary described method in the claim 2 to 5, it is characterized in that the status information mode that whether data block is modified in the object logic of reproduction process source in the described variation bitmap storage comprises:
The sign of the data block in the source object logic that in changing bitmap, is modified in the storage replication process, the not sign of the data block in the source object logic that is not modified in the storage replication process; The described state information updating that will change the data block that comprises in the write request in the bitmap is specially for being modified: the sign that increases the data block that comprises in the write request in changing bitmap; Perhaps
The status information that changes the data block in the source object logic that is modified in the bitmap in reproduction process is set to third state sign, and the status information of the data block in the source object logic that is not modified in the reproduction process is set to the four condition sign; Described will change the data block that comprises in the write request in the bitmap state information updating for being modified, be specially: will change that the status indicator of this data block is updated to third state sign in the bitmap.
8. the reproducing unit of object logic data is characterized in that, comprising:
Acquiring unit is used to obtain the difference bitmap, and described difference bitmap is used for storing source object logic data block and whether has been copied to status information in the purpose object logic;
Monitoring unit is used for after acquiring unit obtains the difference bitmap, and whether monitoring receives the write request of data block in the object logic of modification source;
First judging unit, being used in the monitoring unit monitored results is when not receiving write request, determines not to be copied in the object logic of source data block in the purpose object logic according to the difference bitmap;
Copied cells, the block copy that is used for first judging unit is determined is to the purpose object logic;
First updating block, be used for copied cells with block copy behind the purpose object logic, upgrade the status information of this data block in the difference bitmap.
9. device as claimed in claim 8 is characterized in that, also comprises:
Second judging unit, being used in the monitoring unit monitored results is when receiving write request, according to the difference bitmap, determines whether the corresponding data block of data block sign that comprises in this write request has been copied in the purpose object logic;
First trigger element, be used for if second judging unit is determined the corresponding data block of data block sign that this write request comprises not to be copied in the purpose object logic, trigger copied cells with the block copy of the sign correspondence of the data block that comprises in this write request in the purpose object logic;
Second trigger element, be used for after the block copy of sign correspondence that first trigger element triggers the data block that copied cells comprises this write request is in the purpose object logic, trigger first updating block with the state information updating of this data block in the difference bitmap for being copied in the purpose object logic;
Revise the unit, be used for if second judging unit determine the corresponding data block of data block sign that this write request comprises be copied in the purpose object logic or second trigger element triggered first updating block with the state information updating of this data block in the difference bitmap for being copied in the purpose object logic, revise the data block of the sign correspondence of the data block that comprises in this write request according to write request;
Second updating block is used for revising after the unit revises data block, and for being modified, described variation bitmap is used for the status information that the data block in the object logic of storage replication process source is not modified with the state information updating that changes this data block in the bitmap.
10. device as claimed in claim 9 is characterized in that, described acquiring unit specifically comprises:
Judgment sub-unit is used for determining that this duplicates whether for first the source object logic being copied to the purpose object logic;
First determines subelement, being used for determining in judgment sub-unit that this duplicates not is when first the source object logic being copied to the purpose object logic, with preceding status information of once duplicating the status information that changes when finishing in the bitmap as this difference bitmap that duplicates;
Create subelement, be used for determining this in judgment sub-unit and copy as when first the source object logic being copied to the purpose object logic, content creating be empty difference bitmap and variation bitmap;
Second determines subelement, and the status information that is used for creating source each data block of object logic of the difference bitmap that subelement creates is set to not be copied in the purpose object logic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110039365.1A CN102096616B (en) | 2011-02-15 | 2011-02-15 | Logical object data duplication method and related device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110039365.1A CN102096616B (en) | 2011-02-15 | 2011-02-15 | Logical object data duplication method and related device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102096616A true CN102096616A (en) | 2011-06-15 |
| CN102096616B CN102096616B (en) | 2014-06-25 |
Family
ID=44129720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110039365.1A Active CN102096616B (en) | 2011-02-15 | 2011-02-15 | Logical object data duplication method and related device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102096616B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617096A (en) * | 2013-11-04 | 2014-03-05 | 华为技术有限公司 | Storage data copying method, equipment and system |
| CN103631682A (en) * | 2013-12-18 | 2014-03-12 | 华为技术有限公司 | Data backup implement method and device |
| CN105045541A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Increment snapshot method and apparatus |
| CN105045542A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Method and apparatus for quick snapshot management |
| CN105824724A (en) * | 2016-03-29 | 2016-08-03 | 杭州宏杉科技有限公司 | Method and device for scanning differential data |
| CN103885717B (en) * | 2012-12-19 | 2016-10-12 | 杭州宏杉科技有限公司 | A kind of data copy method and device |
| CN106383667A (en) * | 2016-09-18 | 2017-02-08 | 华为数字技术（成都）有限公司 | Method and apparatus for LUN migration in business operation |
| CN106844597A (en) * | 2017-01-14 | 2017-06-13 | 郑州云海信息技术有限公司 | The method and its device of a kind of quick deletion dependent snapshot target volume |
| CN107797770A (en) * | 2017-11-07 | 2018-03-13 | 深圳神州数码云科数据技术有限公司 | A kind of synchronous method and device of Disk State information |
| CN109324929A (en) * | 2018-09-17 | 2019-02-12 | 郑州云海信息技术有限公司 | A kind of snapshot creation method, device, equipment and readable storage medium storing program for executing |
| CN109885428A (en) * | 2019-02-02 | 2019-06-14 | 杭州宏杉科技股份有限公司 | A kind of method and device for even jumping duplication |
| CN110166558A (en) * | 2019-05-24 | 2019-08-23 | 苏州浪潮智能科技有限公司 | A kind of communication means, device and the equipment of more control storage clusters |
| CN114442944A (en) * | 2022-01-05 | 2022-05-06 | 杭州宏杉科技股份有限公司 | Data copying method, system and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6397229B1 (en) * | 1998-02-02 | 2002-05-28 | International Business Machines Corporation | Storage-controller-managed outboard incremental backup/restore of data |
| CN101000571A (en) * | 2006-01-13 | 2007-07-18 | 株式会社日立制作所 | Storage controller and data management method |
| CN101763297A (en) * | 2010-01-29 | 2010-06-30 | 成都市华为赛门铁克科技有限公司 | Data replication method, system and memory |
-
2011
- 2011-02-15 CN CN201110039365.1A patent/CN102096616B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6397229B1 (en) * | 1998-02-02 | 2002-05-28 | International Business Machines Corporation | Storage-controller-managed outboard incremental backup/restore of data |
| CN101000571A (en) * | 2006-01-13 | 2007-07-18 | 株式会社日立制作所 | Storage controller and data management method |
| CN101763297A (en) * | 2010-01-29 | 2010-06-30 | 成都市华为赛门铁克科技有限公司 | Data replication method, system and memory |
Non-Patent Citations (1)
| Title |
|---|
| 《计算机光盘软件与应用》 20101231 武素华 位图技术在备份系统设计应用中的研究 正文第40-41页 1-10 , 第10期 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885717B (en) * | 2012-12-19 | 2016-10-12 | 杭州宏杉科技有限公司 | A kind of data copy method and device |
| CN103617096A (en) * | 2013-11-04 | 2014-03-05 | 华为技术有限公司 | Storage data copying method, equipment and system |
| CN103631682A (en) * | 2013-12-18 | 2014-03-12 | 华为技术有限公司 | Data backup implement method and device |
| CN103631682B (en) * | 2013-12-18 | 2016-12-07 | 华为技术有限公司 | The implementation method of data backup and device |
| CN105045542B (en) * | 2015-09-11 | 2018-08-03 | 浪潮(北京)电子信息产业有限公司 | A kind of method and device for realizing snapshot management |
| CN105045541B (en) * | 2015-09-11 | 2019-06-18 | 浪潮(北京)电子信息产业有限公司 | A kind of incremental snapshot method and device |
| CN105045542A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Method and apparatus for quick snapshot management |
| CN105045541A (en) * | 2015-09-11 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Increment snapshot method and apparatus |
| CN105824724A (en) * | 2016-03-29 | 2016-08-03 | 杭州宏杉科技有限公司 | Method and device for scanning differential data |
| CN105824724B (en) * | 2016-03-29 | 2019-01-25 | 杭州宏杉科技股份有限公司 | A kind of variance data scan method and device |
| CN106383667A (en) * | 2016-09-18 | 2017-02-08 | 华为数字技术（成都）有限公司 | Method and apparatus for LUN migration in business operation |
| CN106383667B (en) * | 2016-09-18 | 2019-06-21 | 华为数字技术（成都）有限公司 | The method and apparatus that LUN is migrated in service operation |
| CN106844597A (en) * | 2017-01-14 | 2017-06-13 | 郑州云海信息技术有限公司 | The method and its device of a kind of quick deletion dependent snapshot target volume |
| CN107797770B (en) * | 2017-11-07 | 2020-08-21 | 深圳神州数码云科数据技术有限公司 | Method and device for synchronizing disk state information |
| CN107797770A (en) * | 2017-11-07 | 2018-03-13 | 深圳神州数码云科数据技术有限公司 | A kind of synchronous method and device of Disk State information |
| CN109324929A (en) * | 2018-09-17 | 2019-02-12 | 郑州云海信息技术有限公司 | A kind of snapshot creation method, device, equipment and readable storage medium storing program for executing |
| CN109324929B (en) * | 2018-09-17 | 2021-11-09 | 郑州云海信息技术有限公司 | Snapshot creating method, device and equipment and readable storage medium |
| CN109885428A (en) * | 2019-02-02 | 2019-06-14 | 杭州宏杉科技股份有限公司 | A kind of method and device for even jumping duplication |
| CN109885428B (en) * | 2019-02-02 | 2021-02-26 | 杭州宏杉科技股份有限公司 | Continuous hop replication method and device |
| CN110166558A (en) * | 2019-05-24 | 2019-08-23 | 苏州浪潮智能科技有限公司 | A kind of communication means, device and the equipment of more control storage clusters |
| CN114442944A (en) * | 2022-01-05 | 2022-05-06 | 杭州宏杉科技股份有限公司 | Data copying method, system and equipment |
| CN114442944B (en) * | 2022-01-05 | 2024-02-27 | 杭州宏杉科技股份有限公司 | Data replication method, system and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102096616B (en) | 2014-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102096616B (en) | Logical object data duplication method and related device | |
| US10795788B2 (en) | Remote data replication method and system | |
| US7461201B2 (en) | Storage control method and system for performing backup and/or restoration | |
| US7725668B2 (en) | Computer system and snapshot creation method thereof, delaying snapshot creation until pending transfer between volumes is complete | |
| US9009443B2 (en) | System and method for optimized reclamation processing in a virtual tape library system | |
| US10168908B2 (en) | Method and system for cascaded flashcopy zoning and algorithm and/or computer program code and method implementing the same | |
| US8850142B2 (en) | Enhanced virtual storage replication | |
| US7398354B2 (en) | Achieving data consistency with point-in-time copy operations in a parallel I/O environment | |
| US20060047926A1 (en) | Managing multiple snapshot copies of data | |
| JP4419884B2 (en) | Data replication apparatus, method, program, and storage system | |
| JP2005011317A (en) | Method and device for initializing storage system | |
| US20050251636A1 (en) | Method for controlling storage device controller, storage device controller, and program | |
| US8555012B2 (en) | Data storage apparatus | |
| US11068364B2 (en) | Predictable synchronous data replication | |
| US8990528B2 (en) | Method for fast format of a fully allocated volume when copied from a space efficient volume | |
| US10789018B2 (en) | Supporting non-disruptive movement of a logical volume of non-volatile data storage between storage appliances | |
| US10235089B2 (en) | Storage control device, method and storage system to backup data using allocation information | |
| US20160011791A1 (en) | Storage control apparatus, storage system, and program | |
| US7984236B2 (en) | Data transfer | |
| US20160139842A1 (en) | Storage control apparatus and storage system | |
| CN101295228B (en) | Virtual tape server and method for export of at least one logical volume of source volume pool | |
| US8560789B2 (en) | Disk apparatus, data replicating method onto disk apparatus and program recording medium | |
| US6591264B1 (en) | Method that allows I/O requests to run concurrently with a rollback from a snapshot in a drive array | |
| US20150169220A1 (en) | Storage control device and storage control method | |
| CN104811647B (en) | The double subregion wiring methods of distributed memory system disk towards video stream data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: High tech Park No. 88 University of Electronic Science and technology of Sichuan province in 611731 Chengdu city high tech Zone West Park area Qingshui River Tianchen Road No. 5 building D Applicant after: HUAWEI DIGITAL TECHNOLOGIES (CHENG DU) Co.,Ltd. Address before: High tech Park No. 88 University of Electronic Science and technology of Sichuan province in 611731 Chengdu city high tech Zone West Park area Qingshui River Tianchen Road No. 5 building D Applicant before: CHENGDU HUAWEI SYMANTEC TECHNOLOGIES Co.,Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: CHENGDU HUAWEI SYMANTEC TECHNOLOGIES CO., LTD. TO: HUAWEI DIGITAL TECHNOLOGY (CHENGDU) CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221010 Address after: No. 1899 Xiyuan Avenue, high tech Zone (West District), Chengdu, Sichuan 610041 Patentee after: Chengdu Huawei Technologies Co.,Ltd. Address before: 611731 Area D, Building 5, High-tech Park, University of Electronic Science and Technology of China, No. 88, Tianchen Road, Qingshuihe Area, Western Park, High-tech Zone, Chengdu, Sichuan Province Patentee before: HUAWEI DIGITAL TECHNOLOGIES (CHENG DU) Co.,Ltd. |