CN105260265A - Fusion snapshot realization method and fusion snapshot realization system - Google Patents
Fusion snapshot realization method and fusion snapshot realization system Download PDFInfo
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- CN105260265A CN105260265A CN201510613889.5A CN201510613889A CN105260265A CN 105260265 A CN105260265 A CN 105260265A CN 201510613889 A CN201510613889 A CN 201510613889A CN 105260265 A CN105260265 A CN 105260265A
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Abstract
The invention discloses a fusion snapshot realization method and a fusion snapshot realization system. The method comprises the following steps of before the creating moment of the first snapshot, generating a corresponding snapshot volume on the basis of a source volume, and ensuring the physical isolation between the source volume and the snapshot volume; after the completion of the last snapshot creating moment but before the coming of the current snapshot creating moment, if the condition that an application performs data updating operation on original data stored in a target data block of the source volume at the last snapshot creating moment exists, performing corresponding incremental data storage processing on the snapshot volume; and correspondingly and directly performing data updating on the original data stored in the target data block. Therefore the physical isolation is formed between the snapshot volume and the source volume, so that a snapshot system has the disaster tolerant capability; when the condition that the application needs to update the original data stored in a certain data block in the source volume exists, the corresponding incremental data storage processing is performed on the snapshot volume, so that the snapshot system correspondingly has the fault-tolerance capability.
Description
Technical field
The present invention relates to memory system data security technology area, particularly one merges snapshot implementing method and system.
Background technology
Along with the development of infotech and the universal of network, data pair information system serves effect important all the more, and therefore, the protection problem of data is also more and more subject to people's attention.Cause the reason of loss of data to have two kinds, one is logic error, and another kind is physical damage.Perfect infosystem not only should possess the ability of reply logic error, i.e. fault-tolerant ability, also needs the ability possessing reply physical damage, i.e. redundancy ability.
But, existing fast photographic system or only possess fault-tolerant ability, and lack redundancy ability, or only possess redundancy ability, and lack fault-tolerant ability.Such as, although the fast photographic system adopting mirror image isolation technics to create possesses certain redundancy ability, the problem such as loss of data or damage between the mirror image of twice, front and back cannot be solved, namely do not possess fault-tolerant ability; And in the fast photographic system adopting Copy on write and redirected writing technology to create, have recorded each change of data, rollback process can be carried out to data when logic error appears in system, possesses good fault-tolerant ability, but because above-mentioned fast photographic system have shared the data of source book, and all data only have portion in physical disk, so when physical disk is damaged, the loss of data caused cannot be retrieved, and does not also namely possess redundancy ability.
Can find out in sum how to ensure that fast photographic system both had redundancy ability, having again fault-tolerant ability is current problem demanding prompt solution.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of fusion snapshot implementing method and system, ensure that fast photographic system both had redundancy ability, again there is fault-tolerant ability.Its concrete scheme is as follows:
A kind of fusion snapshot implementing method, comprising:
Before the snapshot creation moment first, generate corresponding snapped volume based on source book, and guarantee physical isolation between described source book and described snapped volume;
After the upper once snapshot creation moment terminates, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of described source book during described last snapshot creation, then on described snapped volume, carry out corresponding incremental data specimens preserving, and correspondingly directly Data Update is carried out to the former data of preserving in described target data block.
Preferably, described before the snapshot creation moment first, generate corresponding snapped volume based on source book, and guarantee physically-isolated process between described source book and described snapped volume, comprising:
Before the snapshot creation moment first, utilize mirror image isolation technics, Remote Switched Port Analyzer establishment is carried out to described source book, generate corresponding mirrored volume.
Preferably, described process of carrying out corresponding incremental data specimens preserving on described snapped volume, specifically comprises:
Calculate the Data Update increment that described last snapshot creation moment and described recent snapshot create described target data block between the moment, and an incremental data block is created on described mirrored volume, described Data Update increment is kept at described incremental data block, records the data block corresponding relation between described target data block and described incremental data block simultaneously.
Preferably, inscribe the process of carrying out snapshot creation when snapshot creation first to comprise:
Snapshot is done to the mirrored volume obtained before the snapshot creation moment first, obtains initial snapshot;
Inscribe the process of carrying out snapshot creation when other snapshot creations to comprise:
According to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.
Preferably, the ratio between the memory capacity of described mirrored volume and the memory capacity of described source book is more than or equal to 2.
The invention also discloses a kind of snapshot that merges and realize system, comprising:
Snapped volume generation module, for before the snapshot creation moment first, generates corresponding snapped volume based on source book, and guarantees physical isolation between described source book and described snapped volume;
Incremental data preserves module, after terminating in the upper once snapshot creation moment, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of described source book during described last snapshot creation, then on described snapped volume, carry out corresponding incremental data specimens preserving;
Data update module, for when there is the situation of described Data Update operation, correspondingly directly carries out Data Update to the former data of preserving in described target data block.
Preferably, described snapped volume generation module is specially mirror module;
Described mirror module, for before the snapshot creation moment first, utilizes mirror image isolation technics, carries out Remote Switched Port Analyzer establishment to described source book, generate corresponding mirrored volume.
Preferably, described incremental data is preserved module and is specially redirection module;
Described redirection module comprises:
Incremental computations unit, creates the Data Update increment of described target data block between the moment for calculating described last snapshot creation moment and described recent snapshot;
Data block creating unit, for after described incremental computations unit calculates described Data Update increment, described mirrored volume creates an incremental data block;
Increment storage unit, for being saved to described incremental data block by described Data Update increment;
Relation record unit, for recording the data block corresponding relation between described target data block and described incremental data block.
Preferably, described system also comprises:
Snapshot creation module, when carrying out snapshot creation for inscribing when snapshot creation first, doing snapshot to the mirrored volume obtained before the snapshot creation moment first, obtaining initial snapshot; Inscribe when other snapshot creations when carrying out snapshot creation, according to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.
Preferably, the ratio between the memory capacity of described mirrored volume and the memory capacity of described source book is more than or equal to 2.
In the present invention, before the snapshot creation moment first, generate corresponding snapped volume based on source book, and guarantee physical isolation between source book and snapped volume; After the upper once snapshot creation moment terminates, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of source book during last snapshot creation, then on snapped volume, carry out corresponding incremental data specimens preserving, and correspondingly directly Data Update is carried out to the former data of preserving in target data block.Visible, the present invention is before the snapshot creation moment first, physical isolation between the snapped volume generated and source book, thus fast photographic system is possessed redundancy ability, and when there is application and needing the former data of certain data block preservation in source book to upgrade, just on snapped volume, carry out corresponding incremental data specimens preserving, thus achieve the record of data change is operated, make fast photographic system possess fault-tolerant ability accordingly thus.In summary, this invention ensures that fast photographic system both had redundancy ability, again there is fault-tolerant ability.In addition, because the present invention carries out incremental data specimens preserving on snapped volume, source book is then the legacy data of target data block is directly upgraded, thus source book can directly be responded in write operation to external world, improve the access usefulness of source book.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the disclosed a kind of fusion snapshot implementing method process flow diagram of the embodiment of the present invention;
Fig. 2 is that the disclosed a kind of snapshot that merges of the embodiment of the present invention realizes system application structure schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of fusion snapshot implementing method, shown in Figure 1, the method comprises:
Step S101: before the snapshot creation moment first, generates corresponding snapped volume based on source book, and guarantees physical isolation between source book and snapped volume;
Step S102: after the upper once snapshot creation moment terminates, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of source book during last snapshot creation, then on snapped volume, carry out corresponding incremental data specimens preserving, and correspondingly directly Data Update is carried out to the former data of preserving in target data block.
In the embodiment of the present invention, before the snapshot creation moment first, generate corresponding snapped volume based on source book, and guarantee physical isolation between source book and snapped volume; After the upper once snapshot creation moment terminates, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of source book during last snapshot creation, then on snapped volume, carry out corresponding incremental data specimens preserving, and correspondingly directly Data Update is carried out to the former data of preserving in target data block.
Visible, the embodiment of the present invention is before the snapshot creation moment first, physical isolation between the snapped volume generated and source book, thus fast photographic system is possessed redundancy ability, and when there is application and needing the former data of certain data block preservation in source book to upgrade, just on snapped volume, carry out corresponding incremental data specimens preserving, thus achieve the record of data change is operated, make fast photographic system possess fault-tolerant ability accordingly thus.In summary, the embodiment of the present invention ensure that fast photographic system both had redundancy ability, has fault-tolerant ability again.In addition, because the embodiment of the present invention carries out incremental data specimens preserving on snapped volume, source book is then the legacy data of target data block is directly upgraded, thus source book can directly be responded in write operation to external world, improve the access usefulness of source book.
The embodiment of the invention discloses a kind of fusion snapshot implementing method specifically, relative to a upper embodiment, the present embodiment has done further instruction and optimization to technical scheme.Be specially:
Corresponding snapped volume is generated based on source book in a upper embodiment step S101, and guarantee physically-isolated process between source book and snapped volume, specifically comprise: before the snapshot creation moment first, utilize mirror image isolation technics, Remote Switched Port Analyzer establishment is carried out to source book, generates corresponding mirrored volume.
The process of carrying out corresponding incremental data specimens preserving on snapped volume in a upper embodiment step S102, specifically comprise: calculate the Data Update increment that last snapshot creation moment and recent snapshot create target data block between the moment, and an incremental data block is created on mirrored volume, Data Update increment is kept at incremental data block, the data block corresponding relation simultaneously between record object data block and incremental data block.Wherein, the difference between the data of preserving in target data block is inscribed when inscribing the data and a upper snapshot creation of preserving in target data block when above-mentioned Data Update increment is recent snapshot establishment.
It should be noted that, inscribe the process of carrying out snapshot creation when snapshot creation first and specifically comprise: snapshot is done to the mirrored volume obtained before the snapshot creation moment first, obtains initial snapshot; Inscribe the process of carrying out snapshot creation when other snapshot creations to comprise: according to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.Wherein, other snapshot creation moment above-mentioned refer to the non-moment of snapshot creation first.
Further, in order to ensure that the mirrored volume created has enough memory capacity, the ratio between the memory capacity of mirrored volume and the memory capacity of source book is preferentially set to and is more than or equal to 2 by the present embodiment.
The embodiment of the invention also discloses a kind of snapshot that merges and realize system, shown in Figure 2, this system comprises:
Snapped volume generation module 21, for before the snapshot creation moment first, generates corresponding snapped volume based on source book, and guarantees physical isolation between source book and snapped volume;
Incremental data preserves module 22, after terminating in the upper once snapshot creation moment, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of source book during last snapshot creation, then on snapped volume, carry out corresponding incremental data specimens preserving;
Data update module 23, for when there is the situation of Data Update operation, correspondingly directly carries out Data Update to the former data of preserving in target data block.
Wherein, above-mentioned snapped volume generation module 21 is specially mirror module; Wherein,
Mirror module, specifically for before the snapshot creation moment first, utilizes mirror image isolation technics, carries out Remote Switched Port Analyzer establishment to source book, generates corresponding mirrored volume.
Further, in the present embodiment, incremental data is preserved module 22 and is specially redirection module; Wherein, redirection module specifically comprises:
Incremental computations unit, creates the Data Update increment of target data block between the moment for calculating last snapshot creation moment and recent snapshot;
Data block creating unit, for after incremental computations unit calculates Data Update increment, mirrored volume creates an incremental data block;
Increment storage unit, for being saved to incremental data block by Data Update increment;
Relation record unit, for the data block corresponding relation between record object data block and incremental data block.
Understandable, the system in the present embodiment also needs to comprise: snapshot creation module, when carrying out snapshot creation for inscribing when snapshot creation first, doing snapshot, obtain initial snapshot to the mirrored volume obtained before the snapshot creation moment first; Inscribe when other snapshot creations when carrying out snapshot creation, according to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.
Further, in order to ensure that the mirrored volume created has enough memory capacity, the ratio between the memory capacity of mirrored volume and the memory capacity of source book is preferentially set to and is more than or equal to 2 by the present embodiment.
In the embodiment of the present invention, snapped volume generation module was used for before the snapshot creation moment first, generates corresponding snapped volume, and guarantee physical isolation between source book and snapped volume based on source book; Incremental data preserves module then for after terminating in the upper once snapshot creation moment, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of source book during last snapshot creation, then on snapped volume, carry out corresponding incremental data specimens preserving, and utilize data update module, correspondingly directly Data Update is carried out to the former data of preserving in target data block.
Visible, in the embodiment of the present invention, snapped volume generation module is before the snapshot creation moment first, physical isolation between the snapped volume generated and source book, thus fast photographic system is possessed redundancy ability, and when there is application and needing the former data of certain data block preservation in source book to upgrade, just module is preserved by incremental data, snapped volume carries out corresponding incremental data specimens preserving, thus achieve the record of data change is operated, make fast photographic system possess fault-tolerant ability accordingly thus.In summary, the embodiment of the present invention ensure that fast photographic system both had redundancy ability, has fault-tolerant ability again.In addition, because the embodiment of the present invention carries out incremental data specimens preserving on snapped volume, source book is then utilize data update module, the legacy data of target data block is directly upgraded, thus source book can directly be responded in write operation to external world, improve the access usefulness of source book.
Finally, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above one fusion snapshot implementing method provided by the present invention and system are described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. merge a snapshot implementing method, it is characterized in that, comprising:
Before the snapshot creation moment first, generate corresponding snapped volume based on source book, and guarantee physical isolation between described source book and described snapped volume;
After the upper once snapshot creation moment terminates, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of described source book during described last snapshot creation, then on described snapped volume, carry out corresponding incremental data specimens preserving, and correspondingly directly Data Update is carried out to the former data of preserving in described target data block.
2. fusion snapshot implementing method according to claim 1, is characterized in that, described before the snapshot creation moment first, generates corresponding snapped volume based on source book, and guarantees physically-isolated process between described source book and described snapped volume, comprising:
Before the snapshot creation moment first, utilize mirror image isolation technics, Remote Switched Port Analyzer establishment is carried out to described source book, generate corresponding mirrored volume.
3. fusion snapshot implementing method according to claim 2, is characterized in that, described process of carrying out corresponding incremental data specimens preserving on described snapped volume, specifically comprises:
Calculate the Data Update increment that described last snapshot creation moment and described recent snapshot create described target data block between the moment, and an incremental data block is created on described mirrored volume, described Data Update increment is kept at described incremental data block, records the data block corresponding relation between described target data block and described incremental data block simultaneously.
4. fusion snapshot implementing method according to claim 3, is characterized in that,
Inscribe the process of carrying out snapshot creation when snapshot creation first to comprise:
Snapshot is done to the mirrored volume obtained before the snapshot creation moment first, obtains initial snapshot;
Inscribe the process of carrying out snapshot creation when other snapshot creations to comprise:
According to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.
5. the fusion snapshot implementing method according to any one of claim 2 to 4, is characterized in that, the ratio between the memory capacity of described mirrored volume and the memory capacity of described source book is more than or equal to 2.
6. merge snapshot and realize a system, it is characterized in that, comprising:
Snapped volume generation module, for before the snapshot creation moment first, generates corresponding snapped volume based on source book, and guarantees physical isolation between described source book and described snapped volume;
Incremental data preserves module, after terminating in the upper once snapshot creation moment, and before recent snapshot creates moment arrival, if the situation of Data Update operation is carried out in existence application to inscribing the former data of preserving in the target data block of described source book during described last snapshot creation, then on described snapped volume, carry out corresponding incremental data specimens preserving;
Data update module, for when there is the situation of described Data Update operation, correspondingly directly carries out Data Update to the former data of preserving in described target data block.
7. fusion snapshot according to claim 6 realizes system, it is characterized in that, described snapped volume generation module is specially mirror module;
Described mirror module, for before the snapshot creation moment first, utilizes mirror image isolation technics, carries out Remote Switched Port Analyzer establishment to described source book, generate corresponding mirrored volume.
8. fusion snapshot according to claim 7 realizes system, it is characterized in that, described incremental data is preserved module and is specially redirection module;
Described redirection module comprises:
Incremental computations unit, creates the Data Update increment of described target data block between the moment for calculating described last snapshot creation moment and described recent snapshot;
Data block creating unit, for after described incremental computations unit calculates described Data Update increment, described mirrored volume creates an incremental data block;
Increment storage unit, for being saved to described incremental data block by described Data Update increment;
Relation record unit, for recording the data block corresponding relation between described target data block and described incremental data block.
9. fusion snapshot according to claim 8 realizes system, it is characterized in that, also comprises:
Snapshot creation module, when carrying out snapshot creation for inscribing when snapshot creation first, doing snapshot to the mirrored volume obtained before the snapshot creation moment first, obtaining initial snapshot; Inscribe when other snapshot creations when carrying out snapshot creation, according to all data block corresponding relations of the interocclusal record in this snapshot creation moment and a front snapshot creation moment, snapshot is done to the mirrored volume inscribed during this snapshot creation, obtains corresponding incremental snapshot.
10. the fusion snapshot according to any one of claim 6 to 9 realizes system, it is characterized in that, the ratio between the memory capacity of described mirrored volume and the memory capacity of described source book is more than or equal to 2.
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Application publication date: 20160120 |