CN102331957B - File backup method and device - Google Patents
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- CN102331957B CN102331957B CN 201110302038 CN201110302038A CN102331957B CN 102331957 B CN102331957 B CN 102331957B CN 201110302038 CN201110302038 CN 201110302038 CN 201110302038 A CN201110302038 A CN 201110302038A CN 102331957 B CN102331957 B CN 102331957B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
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Abstract
The invention discloses a file backup method and device and belongs to the field of a computer system. The method comprises the following steps: analyzing an entire path name of an unlinked file which is used by a process currently; establishing a temporary directory entry of the unlinked file and marking the entire path name of the temporary directory entry with an identifier; establishing a congruent relationship between the marked entire path name of the temporary directory entry and an index node of a copy of the unlinked file in an internal memory and a congruent relationship between the marked entire path name of the temporary directory entry and the entire path name of the unlinked file; and storing the marked entire path name of the temporary directory entry into an image file, thereby finishing the back-up of the unlinked file. According to the method, the back-up of the unlinked file is realized by correctly analyzing the entire path name of the unlinked file and establishing the temporary directory entry of the unlinked file.
Description
Technical field
The present invention relates to field of computer, particularly a kind of method and device of file backup.
Background technology
Operation to file in (SuSE) Linux OS is managed by operating right, and basic operating right comprises to be read (read), write (write) and carry out (execute).For the file on the disk, be not that the mode of monopolizing is used, even a file that is being used, as long as some processes have the write permission of this document place catalogue and carry out authority, this document and directory entry thereof can be by this process-kills so.Source file on this disk and directory entry thereof are deleted but file that copy in internal memory is still used by process just is called as nothing link (unlinked) file.For the unlinked file, though in internal memory, still can be used by process, can't be again have access to this document by its comspec.For example, at network file system(NFS) (Network File System, NFS) in, it is numerous that the process A on client computer has deleted on the server the scene of the file that is used by the process B on another client computer, will produce a lot of unlinked files like this.
In the Application Backup and restoring system under the existing Linux environment, when backup, the traversal process is saved in the metadata information of each file in the file table and the comspec of file in the image file when the file table of the file of front opening; When reduction, restore All Files according to the metadata information and the comspec that are kept in the image file.
But, prior art is when backup, the unlinked file that is using at above-mentioned process, because kernel is not supported the parsing to the comspec of unlinked file at present, therefore can't obtain the comspec of unlinked file, so prior art can't realize the backup to the unlinked file.
Summary of the invention
In order to realize the backup to the unlinked file, the embodiment of the invention provides a kind of method and device of file backup, and technical scheme is as follows:
On the one hand, provide a kind of method of file backup, described method comprises:
The comspec of the no chained file of the current use of parsing process;
Create the temp directory item of described no chained file, and with the comspec of the described temp directory item of identity marking;
Set up the corresponding relation between the index node of the comspec of the temp directory item that described mark crosses and the copy of described no chained file in internal memory, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of described mark and described no chained file;
The comspec of the temp directory item that described mark is crossed is saved in the image file, finishes the backup of described no chained file;
Wherein, the comspec of the no chained file of the current use of described parsing process comprises:
From internal memory, obtain each layer pathname of described no chained file in the data structure relevant with described no chained file;
Successively described each layer pathname is stitched together with the path decollator, obtains the comspec of described no chained file.
On the other hand, provide a kind of device of file backup, described device comprises: backup module;
Described backup module comprises:
Resolution unit is used for the comspec of the no chained file of the current use of parsing process;
Creating unit be used for to be created the temp directory item of described no chained file, and with the comspec of the described temp directory item of identity marking;
The corresponding relation administrative unit, be used for setting up comspec and the corresponding relation of described no chained file between the index node of the copy of internal memory of the temp directory item that described creating unit mark crosses, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of described creating unit mark and the no chained file that described resolution unit is resolved;
Preserve the unit, the comspec that is used for temp directory item that described creating unit mark is crossed is saved in image file, finishes the backup of described no chained file;
Wherein, described resolution unit, concrete each layer pathname that is used for from the internal memory data structure relevant with described no chained file, obtaining described no chained file; Successively described each layer pathname is stitched together with the path decollator, obtains the comspec of described no chained file.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
By correctly parsing the comspec of no chained file, and create the temp directory item of this no chained file, and then the corresponding relation between the index node of the comspec by setting up this temp directory item and the copy of this no chained file in internal memory, and and comspec that should no chained file between corresponding relation, realized the backup to no chained file, what remedied the no chained file that in Application Backup under the Linux environment and the restoring system process used can't back up this function breach, has promoted the functional completeness of Application Backup and restoring system.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only 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.
Fig. 1 is the method flow diagram of the file backup that provides of the embodiment of the invention one;
Fig. 2 is the method flow diagram of the file backup that provides of the embodiment of the invention two;
Fig. 3 is the method flow diagram of the file reduction that provides of the embodiment of the invention two;
Fig. 4 is the apparatus structure synoptic diagram of the file backup that provides of the embodiment of the invention three;
Fig. 5 is the structural representation of the backup module that provides of the embodiment of the invention three;
Fig. 6 is the structural representation of the recovery module that provides of the embodiment of the invention three;
Fig. 7 is the structural representation of the another kind of recovery module that provides of the embodiment of the invention three.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment one
The embodiment of the invention provides a kind of method of file backup, and referring to Fig. 1, method flow comprises:
101: the comspec of the unlinked file of the current use of parsing process;
102: create the temp directory item of this unlinked file, and with the comspec of this temp directory item of identity marking;
103: set up the corresponding relation between the index node of the comspec of the temp directory item that this mark crosses and the copy of this unlinked file in internal memory, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of this mark and this unlinked file;
104: the comspec of the temp directory item that this mark is crossed is saved in the image file, finishes the backup of this unlinked file.
The method that the embodiment of the invention provides, by correctly parsing the comspec of unlinked file, and create the temp directory item of this unlinked file, and then the corresponding relation between the index node of the comspec by setting up this temp directory item and the copy of this unlinked file in internal memory, and and the comspec of this unlinked file between corresponding relation, realized the backup to the unlinked file, what remedied the unlinked file that in Application Backup under the Linux environment and the restoring system process used can't back up this function breach, has promoted the functional completeness of Application Backup and restoring system.
Embodiment two
The embodiment of the invention provides a kind of method of file backup-and-restore, for the backup-and-restore of the unlinked file of realizing process is being used.When backup, referring to Fig. 2, the method for file backup comprises:
201: the comspec of the unlinked file of the current use of parsing process;
Particularly, existing application backup-and-restore system is when backup, the comspec analytical algorithm d_path of file does not support the comspec of unlinked file is resolved, this is to judge because this algorithm can be a unlinked to the file that will resolve, when judging that the file that will resolve is a unlinked file, this algorithm can think that it is insignificant that the pathname of unlinked file is resolved, and then will refuse to resolve the comspec of this unlinked file.The method that the embodiment of the invention provides, can be in this a system self-defined cover comspec analytical algorithm, this comspec analytical algorithm can improve on the basis of d_path algorithm and obtain, when the comspec of resolution file, do not go to judge namely that this file that will resolve is the unlinked file, but directly resolve the comspec of this document.The mode of the comspec of this arithmetic analysis unlinked file specifically can be: each layer pathname that obtains this unlinked file from internal memory in the data structure relevant with this unlinked file; Each layer pathname that successively will obtain is stitched together with path decollator "/", obtains the comspec of this unlinked file.The comspec of this unlinked file that for example, parses is "/root/fileA ".
202: create the temp directory item of this unlinked file, and with the comspec of this temp directory item of identity marking;
Particularly, though parsed the comspec of this unlinked file, but can't obtain fileinfo according to this comspec this moment, therefore, under a certain catalogue of the file system under this unlinked file, create a temp directory item, be used for substituting the comspec of this unlinked file, in order to can correctly get access to the fileinfo of this unlinked file.For example, the comspec of the temp directory item of establishment is "/root/.tmp_unlinked/fileA ".
Further, create this temp directory item after, with the comspec of this temp directory item of identity marking, it is an interim comspec that substitutes that this sign is used for this comspec of expression, in order to can be identified when reduction.The embodiment of the invention does not limit which type of sign of concrete employing.
203: set up the corresponding relation between the index node of the comspec of the temp directory item that this mark crosses and the copy of this unlinked file in internal memory;
Particularly, because this unlinked file is used by process, therefore the copy of this unlinked file is arranged in internal memory.Set up the corresponding relation between the index node of the comspec of the temp directory item that this mark crosses and this copy, so that the comspec of the temp directory item that can cross by this mark in when reduction has access to this index node, and then obtains the fileinfo of this unlinked file from copy by this index node.Wherein, this corresponding relation can be realized by hard link, also can realize by soft link.
204: set up the corresponding relation between the comspec of the comspec of the temp directory item that this mark crosses and this unlinked file;
Particularly, can in the corresponding relation administrative unit, increase clauses and subclauses, record the comspec of the temp directory item that this mark crosses and the comspec of the unlinked file that its substitutes.The corresponding relation administrative unit is for the corresponding relation between the comspec of the comspec of managing the temp directory item and unlinked file, and the backup operation of whenever carrying out a unlinked file all need be added the clauses and subclauses of a correspondence in this unit.
Need to prove that above-mentioned 203 and 204 execution sequence both can carry out 203 earlier in no particular order, carried out 204 again, also can carry out 204 earlier, carried out 203 again, the embodiment of the invention is not done concrete restriction to this.
205: the comspec of the temp directory item that this mark is crossed is saved in the image file, finishes the backup of this unlinked file.
Particularly, the comspec of the temp directory item of crossing with this mark replaces the comspec of this unlinked file to be saved in the image file, for example, is saved in the image file with "/root/.tmp_unlinked/fileA " replacement "/root/fileA ".
After finishing backup, when reduction, referring to Fig. 3, the method for file reduction comprises:
301: from image file, read comspec;
Wherein, the information such as comspec of the file of backup have been preserved in the image file, "/root/.tmp_unlinked/fileA ", "/root/fileB " etc.
302: judge whether the comspec that reads has sign, if sign is arranged, then carries out 303, if do not identify, then reduces according to the method for reducing at non-unlinked file in the prior art, and flow process finishes;
Particularly, check whether the comspec that reads has sign, if sign is arranged, then judge the comspec of the temp directory item that this comspec that reads is the unlinked file, that is to say, this comspec that reads is the interim alternative route name of a unlinked file, needs to restore this unlinked file according to this interim alternative route name; If sign does not illustrate that then this comspec that reads is not interim alternative route name, then can reduce according to the method for reducing at non-unlinked file in the prior art, flow process finishes.
For example, the example above the continuity is if the comspec that reads is "/root/.tmp_unlinked/fileA ", it has sign, then carries out 303, if the comspec that reads is "/root/fileB ", it is sign not, then reduces according to method of reducing of the prior art, and flow process finishes.
303: obtain corresponding index node according to the comspec that reads, and obtain the fileinfo of this unlinked file according to the index node that obtains;
Particularly, because the comspec that reads is an interim alternative route name, therefore can be according to the comspec of the temp directory item of setting up in 203 and the corresponding relation between the index node, obtain the index node corresponding with this comspec that reads, and read concrete fileinfo to internal memory by using corresponding interface function from disk according to this index node.
Wherein, this document information comprises the metadata information of file and concrete file content etc., and this metadata information comprises size, creation-time, modification time of file etc.
304: the comspec that obtains the unlinked file of the comspec correspondence that reads;
Particularly, can be according to the corresponding relation between the comspec of the comspec of the temp directory item of setting up in 204 and unlinked file, obtain the comspec of the unlinked file of this comspec correspondence that reads, for example, search the clauses and subclauses of this comspec correspondence that reads in the corresponding relation administrative unit, and therefrom obtain the comspec of this unlinked file that comspec substituted that reads, obtain finish after with this clauses and subclauses deletion.
305: the fileinfo that obtains is reverted under the directory entry of comspec correspondence of this unlinked file;
Particularly, move under the directory entry of comspec correspondence of this unlinked file getting access to fileinfo in the internal memory, finish the reduction of this unlinked file.
306: remove this comspec that reads of foundation when backup and the corresponding relation between this index node that obtains, and delete the temp directory item of this comspec correspondence that reads.
Particularly, after the unlinked file of this comspec correspondence of obtaining reduced, corresponding relation between this comspec that releasing was created in when backup and the corresponding index node, and with the temp directory entry deletion of this comspec correspondence that reads, the redundant data on the defrag.
The method that the embodiment of the invention provides, by correctly parsing the comspec of unlinked file, and create the temp directory item of this unlinked file, and then the corresponding relation between the index node of the comspec by setting up this temp directory item and the copy of this unlinked file in internal memory, and and the comspec of this unlinked file between corresponding relation, realized the backup-and-restore to the unlinked file, what remedied the unlinked file that in Application Backup under the Linux environment and the restoring system process used can't this function breach of backup-and-restore, has promoted the functional completeness of Application Backup and restoring system.
Embodiment three
The embodiment of the invention provides a kind of device of file backup, can realize the method step among above-described embodiment one and the embodiment two.This device comprises backup module 401, and referring to Fig. 4, alternatively, this device can also comprise recovery module 402;
Referring to Fig. 5, backup module 401 comprises:
Creating unit 401b be used for to create the temp directory item of this unlinked file, and with the comspec of this temp directory item of identity marking;
Corresponding relation administrative unit 401c, be used for setting up comspec and the corresponding relation of this unlinked file between the index node of the copy of internal memory of the temp directory item that creating unit 401b mark crosses, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of creating unit 401b mark and the unlinked file that resolution unit 401a resolves;
Further, resolution unit 401a, concrete each layer pathname that is used for from the internal memory data structure relevant with this unlinked file, obtaining this unlinked file; Successively each layer pathname is stitched together with the path decollator, obtains the comspec of this unlinked file.
Referring to Fig. 6, recovery module 402 comprises:
Reading unit 402a is used for reading comspec from image file;
Judging unit 402b is used for judging whether the comspec that reading unit 402a reads has sign, if sign is arranged, then judges the comspec of the temp directory item that this comspec that reads is the unlinked file;
The first acquiring unit 402c, be used for after judging unit 402b judges the comspec of the temp directory item that this comspec that reads is the unlinked file, obtain corresponding index node according to this comspec that reads, and obtain the fileinfo of this unlinked file according to the index node that obtains;
Further, referring to Fig. 7, recovery module 402 also comprises:
In sum, the embodiment of the invention is by correctly parsing the comspec of unlinked file, and create the temp directory item of this unlinked file, and then the corresponding relation between the index node of the comspec by setting up this temp directory item and the copy of this unlinked file in internal memory, and and the comspec of this unlinked file between corresponding relation, realized the backup-and-restore to the unlinked file, what remedied the unlinked file that in Application Backup under the Linux environment and the restoring system process used can't this function breach of backup-and-restore, has promoted the functional completeness of Application Backup and restoring system.
Need to prove: the device of the file backup that above-described embodiment provides is when the backup-and-restore file, only the division with above-mentioned each functional module is illustrated, in the practical application, can as required the above-mentioned functions distribution be finished by different functional modules, the inner structure that is about to device is divided into different functional modules, to finish all or part of function described above.In addition, the device of the file backup that above-described embodiment provides and the method embodiment of file backup belong to same design, and its specific implementation process sees method embodiment for details, repeats no more here.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The all or part of step that one of ordinary skill in the art will appreciate that realization above-described embodiment can be finished by hardware, also can instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the method for file backup is characterized in that described method comprises:
The comspec of the no chained file of the current use of parsing process;
Create the temp directory item of described no chained file, and with the comspec of the described temp directory item of identity marking;
Set up the corresponding relation between the index node of the comspec of the temp directory item that described mark crosses and the copy of described no chained file in internal memory, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of described mark and described no chained file;
The comspec of the temp directory item that described mark is crossed is saved in the image file, finishes the backup of described no chained file;
Wherein, the comspec of the no chained file of the current use of described parsing process comprises:
From internal memory, obtain each layer pathname of described no chained file in the data structure relevant with described no chained file;
Successively described each layer pathname is stitched together with the path decollator, obtains the comspec of described no chained file.
2. method according to claim 1 is characterized in that, described method also comprises:
From described image file, read comspec;
Judge whether the comspec that reads has sign, if sign is arranged, judge that then the described comspec that reads is the comspec of the temp directory item of no chained file;
Obtain corresponding index node according to the described comspec that reads, and obtain the fileinfo of described no chained file according to the index node that obtains;
Obtain the comspec of the described no chained file of the described comspec correspondence that reads;
The described fileinfo that obtains is reverted under the directory entry of comspec correspondence of described no chained file.
3. method according to claim 2 is characterized in that, the described fileinfo that obtains is reverted under the directory entry of comspec correspondence of described no chained file after, also comprise:
Remove the corresponding relation between the described comspec that reads and the described index node that obtains, and delete the temp directory item of the described comspec correspondence that reads.
4. the device of a file backup is characterized in that described device comprises: backup module;
Described backup module comprises:
Resolution unit is used for the comspec of the no chained file of the current use of parsing process;
Creating unit be used for to be created the temp directory item of described no chained file, and with the comspec of the described temp directory item of identity marking;
The corresponding relation administrative unit, be used for setting up comspec and the corresponding relation of described no chained file between the index node of the copy of internal memory of the temp directory item that described creating unit mark crosses, and the corresponding relation between the comspec of the comspec of the temp directory item crossed of described creating unit mark and the no chained file that described resolution unit is resolved;
Preserve the unit, the comspec that is used for temp directory item that described creating unit mark is crossed is saved in image file, finishes the backup of described no chained file;
Wherein, described resolution unit, concrete each layer pathname that is used for from the internal memory data structure relevant with described no chained file, obtaining described no chained file; Successively described each layer pathname is stitched together with the path decollator, obtains the comspec of described no chained file.
5. device according to claim 4 is characterized in that, described device also comprises: recovery module;
Described recovery module comprises:
Reading unit is used for reading comspec from described image file;
Judging unit is used for judging whether the comspec that described reading unit reads has sign, if sign is arranged, judges that then the described comspec that reads is the comspec of the temp directory item of no chained file;
First acquiring unit, be used for after described judging unit is judged the comspec of the described comspec that reads for the temp directory item of no chained file, obtain corresponding index node according to the described comspec that reads, and obtain the fileinfo of described no chained file according to the index node that obtains;
Second acquisition unit is used for obtaining the comspec of the described no chained file of the described comspec correspondence that reads after described judging unit is judged the comspec of the described comspec that reads for the temp directory item of no chained file;
Reduction unit is used for the described fileinfo that described first acquiring unit obtains is reverted under the directory entry of comspec correspondence of the no chained file that described second acquisition unit obtains.
6. device according to claim 5 is characterized in that, described recovery module also comprises:
The cleaning unit is used for removing the corresponding relation between the described comspec that reads and the described index node that obtains, and deleting the temp directory item of the described comspec correspondence that reads after described reduction unit has reduced.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110302038 CN102331957B (en) | 2011-09-28 | 2011-09-28 | File backup method and device |
| PCT/CN2012/082248 WO2013044837A1 (en) | 2011-09-28 | 2012-09-28 | File backup method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110302038 CN102331957B (en) | 2011-09-28 | 2011-09-28 | File backup method and device |
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| CN102331957A CN102331957A (en) | 2012-01-25 |
| CN102331957B true CN102331957B (en) | 2013-08-28 |
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| CN 201110302038 Expired - Fee Related CN102331957B (en) | 2011-09-28 | 2011-09-28 | File backup method and device |
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| CN (1) | CN102331957B (en) |
| WO (1) | WO2013044837A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331957B (en) * | 2011-09-28 | 2013-08-28 | 华为技术有限公司 | File backup method and device |
| JP5759915B2 (en) * | 2012-02-15 | 2015-08-05 | 株式会社日立ソリューションズ | File list generation method and system, program, and file list generation device |
| CN103645905B (en) * | 2013-12-20 | 2017-08-08 | 北京中电普华信息技术有限公司 | A kind of incremental data acquisition method and device |
| CN104484240B (en) * | 2014-12-09 | 2021-03-23 | 青岛海信宽带多媒体技术有限公司 | Terminal data storage method and device |
| CN104615507A (en) * | 2015-02-13 | 2015-05-13 | 广东欧珀移动通信有限公司 | Backup data batch reduction method and device |
| CN105045686B (en) * | 2015-08-28 | 2019-03-01 | 小米科技有限责任公司 | File access pattern method and device |
| CN105095025B (en) * | 2015-08-28 | 2018-11-02 | 小米科技有限责任公司 | Restore the method and device of deleted document in ext file system |
| CN106557384B (en) * | 2015-09-25 | 2020-10-02 | 南京中兴软件有限责任公司 | Data processing method, device and system based on Linux |
| CN107239480B (en) * | 2016-03-28 | 2021-01-29 | 阿里巴巴集团控股有限公司 | Method and apparatus for performing renaming operations for distributed file systems |
| CN107436952A (en) * | 2017-08-15 | 2017-12-05 | 郑州云海信息技术有限公司 | A kind of document copying method and device based on distributed memory system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6088694A (en) * | 1998-03-31 | 2000-07-11 | International Business Machines Corporation | Continuous availability and efficient backup for externally referenced objects |
| US7475098B2 (en) * | 2002-03-19 | 2009-01-06 | Network Appliance, Inc. | System and method for managing a plurality of snapshots |
| US7155458B1 (en) * | 2002-04-05 | 2006-12-26 | Network Appliance, Inc. | Mechanism for distributed atomic creation of client-private files |
| US20040139167A1 (en) * | 2002-12-06 | 2004-07-15 | Andiamo Systems Inc., A Delaware Corporation | Apparatus and method for a scalable network attach storage system |
| CN101315640B (en) * | 2008-07-01 | 2010-09-01 | 中兴通讯股份有限公司 | Directory management method and apparatus |
| CN101436151B (en) * | 2008-12-01 | 2012-01-11 | 成都索贝数码科技股份有限公司 | Data real time backup method and system based on file system |
| CN101477487B (en) * | 2009-01-22 | 2010-09-29 | 上海交通大学 | Multiple incremental files backup and recovery method |
| CN102331957B (en) * | 2011-09-28 | 2013-08-28 | 华为技术有限公司 | File backup method and device |
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2011
- 2011-09-28 CN CN 201110302038 patent/CN102331957B/en not_active Expired - Fee Related
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2012
- 2012-09-28 WO PCT/CN2012/082248 patent/WO2013044837A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| CN102331957A (en) | 2012-01-25 |
| WO2013044837A1 (en) | 2013-04-04 |
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