CN110750521A - Data migration method, device and equipment and computer readable storage medium - Google Patents
Data migration method, device and equipment and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a data migration method, which comprises the following steps: acquiring a data migration instruction, wherein the data migration instruction comprises source volume information and target volume information; determining the full flash volume specified by the target volume information as a target volume; reading data specified by the data migration instruction from a common volume specified by the source volume information, and storing the data into a target volume; the method comprises the steps that after a data migration instruction is obtained, a full flash volume appointed by the data migration instruction is used as a target volume, data appointed by the data migration instruction are read from a common volume and then stored in the target volume, and the data migrated each time are the data appointed by the data migration instruction, so that the function of migrating the appointed data in the common volume to the target volume, namely the full flash volume, can be realized; in addition, the invention also provides a data migration device, equipment and a computer readable storage medium, and the beneficial effects are also achieved.
Description
Technical Field
The present invention relates to the field of data storage technologies, and in particular, to a data migration method, a data migration apparatus, a data migration device, and a computer-readable storage medium.
Background
In the technical field of storage, the SSD rapidly occupies the storage market by using its inherent advantages of high performance, fast read/write speed, etc., and a full flash storage system based on the technical characteristics of the SSD is produced. In the process of upgrading from the conventional storage system to the full flash storage system, since a user has written a large amount of data into the normal volume (i.e., the virtual volume created in the conventional storage system), the user can only migrate the data in the normal volume into the full flash volume if the user wants to use the storage system composed of the full flash volume (i.e., the virtual volume created in the full flash storage system). The unit storage space of the ordinary volume is large, and the unit storage space of the full flash volume is small. When data migration is performed, the existing data migration method can only perform data migration with the unit storage space of the ordinary volume as granularity, and sometimes, data in a certain unit storage space in the ordinary volume needs to be migrated to a different full-flash volume in a blocking manner for storage needs, which cannot be achieved by the existing data migration method. Therefore, the existing data migration method is not suitable for data migration work from the common volume to the full flash volume, and data migration is difficult.
Therefore, how to solve the problem that the data migration is difficult due to the fact that the existing data migration method is not suitable for the data migration work from the common volume to the full-flash volume is a technical problem to be solved by a person skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a data migration method, a data migration apparatus, a data migration device, and a computer readable storage medium, which solve the problem that the data migration is difficult due to the fact that the existing data migration method is not suitable for the data migration from the normal volume to the full-flash volume.
In order to solve the above technical problem, the present invention provides a data migration method, including:
acquiring a data migration instruction, wherein the data migration instruction comprises source volume information and target volume information;
determining the full flash volume specified by the target volume information as a target volume;
and reading the data specified by the data migration instruction from the common volume specified by the source volume information, and storing the data into the target volume.
Optionally, after storing the data in the target volume, the method further includes:
judging whether all the data in the common volume are migrated or not;
and if so, deleting the data in the common volume.
Optionally, after reading the data specified by the data migration instruction from the normal volume specified by the source volume information, before storing the data in the target volume, the method further includes:
judging whether the data is all-zero data or not;
and if not, executing the operation of storing the data into the target volume.
Optionally, after reading the data specified by the data migration instruction from the normal volume specified by the source volume information, before determining whether the data is all-zero data, the method further includes:
judging whether the data contains autodelete marks or not;
and if so, executing the operation of judging whether the data is all-zero data.
The invention also provides a data migration device, comprising:
the instruction acquisition module is used for acquiring a data migration instruction, and the data migration instruction comprises source volume information and target volume information;
a target volume determining module, configured to determine a full flash volume specified by the target volume information as a target volume;
and the data migration module is used for reading the data specified by the data migration instruction from the common volume specified by the source volume information and storing the data into the target volume.
Optionally, the method further includes:
the judging module is used for judging whether all the data in the common volume are migrated;
and the deleting module is used for deleting the data in the common volume.
Optionally, the method further includes:
the all-zero judging module is used for judging whether the data is all-zero data;
correspondingly, the data migration module is a module for storing the data into the target volume when the data is not all zero data.
Optionally, the method further includes:
the mark judging module is used for judging whether the data contains an autodelete mark;
correspondingly, the all-zero judging module is a module for judging whether the data is all-zero data when the autodelete mark exists in the data migration instruction.
The invention also provides a data migration device, comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is configured to execute the computer program to implement the data migration method.
The present invention also provides a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the data migration method described above.
According to the data migration method, the data migration instruction is obtained and comprises the source volume information and the target volume information. The full flash volume specified by the target volume information is determined as the target volume. And reading the data specified by the data migration instruction from the common volume specified by the source volume information, and storing the data into the target volume.
Therefore, after the data migration instruction is obtained, the full flash volume specified by the data migration instruction is used as the target volume, the data specified by the data migration instruction is read from the ordinary volume and then stored in the target volume, so that the function of migrating the specified data in the ordinary volume to the target volume, namely the full flash volume, is realized, and the migration of the data from the ordinary volume to the full flash volume is completed; meanwhile, as the data migrated every time are the data specified by the data migration instruction, different data in the common volume can be migrated to different full-flash volumes, the requirement of flexible data storage is met, and the problem that the data migration is difficult due to the fact that the existing data migration method is not suitable for the data migration work from the common volume to the full-flash volumes is solved.
In addition, the invention also provides a data migration device, data migration equipment and a computer readable storage medium, and the beneficial effects are also achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a data migration method according to an embodiment of the present invention;
fig. 2 is a flowchart of a specific data migration method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a data migration apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data migration device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a data migration method according to an embodiment of the present invention. The method comprises the following steps:
s101: and acquiring a data migration instruction, wherein the data migration instruction comprises source volume information and target volume information.
The data migration instruction is used for migrating data in different storage devices or different volumes, wherein the data migration instruction comprises source volume information and target volume information. In the embodiment of the present invention, the data is migrated from the normal volume to the full-flash volume, and therefore the source volume specified by the source volume information needs to be the normal volume and the target volume specified by the target volume information needs to be the full-flash volume. The common volume is a virtual volume created in a conventional storage system, the full flash storage system is a storage system composed of Solid State Disks (SSDs), and the full flash volume is a virtual volume created in the full flash storage system.
The data migration instruction not only includes the source volume information and the target volume information, but also includes other information for data migration, for example, data positioning information, namely the position of the data to be migrated in the source volume; state identification information necessary for the data migration instruction can be further included; and may also include the location where the data is stored in the target volume.
S102: the full flash volume specified by the target volume information is determined as the target volume.
After the data migration instruction is obtained, the data migration instruction is analyzed to obtain various information. The full flash volume specified by the target volume information is determined as a target volume, and the normal volume specified by the source volume information is determined as a source volume.
S103: and reading the data specified by the data migration instruction from the common volume specified by the source volume information, and storing the data into the target volume.
And reading the data specified by the data migration instruction from the ordinary volume specified by the source volume information, namely acquiring the data specified by the data migration instruction from the source volume, and storing the data into the target volume after acquiring the specified data. Because the minimum unit storage space of the ordinary volume is 16MB, and the unit storage space of the full flash volume is generally 8KB, the existing data migration method can only carry out data migration by taking the extension as the minimum migration granularity, and is not suitable for data migration work from the ordinary volume to the full flash volume. By the method of reading data from the source volume and then storing the data into the target volume, the limitation of the minimum migration granularity can be avoided, the data migration is more flexible, and the data in a certain extension in the common volume is sequentially migrated to different full-flash volumes.
By applying the data migration method provided by the embodiment of the invention, after the data migration instruction is acquired, the full flash volume specified by the data migration instruction is used as the target volume, and the data specified by the data migration instruction is read from the common volume and then stored in the target volume, so that the function of migrating the specified data in the common volume to the target volume, namely the full flash volume, is realized, namely, the migration of the data from the common volume to the full flash volume is completed; meanwhile, as the data migrated every time are the data specified by the data migration instruction, different data in the common volume can be migrated to different full-flash volumes, the requirement of flexible data storage is met, and the problem that the data migration is difficult due to the fact that the existing data migration method is not suitable for the data migration work from the common volume to the full-flash volumes is solved.
Based on the above embodiment of the present invention, in order to release the storage space in time, after the data in the source volume is migrated, the source volume may also be deleted, specifically:
step 1: and judging whether all the data in the ordinary volume is migrated or not.
When data migration is performed, the migrated data may be marked, or whether all data in the normal volume, i.e., the source volume, is migrated may be recorded. And judging whether all the data in the ordinary volume is migrated or not in real time, or judging whether all the data in the ordinary volume is migrated or not after data migration is executed.
Step 2: and if so, deleting the data in the ordinary volume.
When it is determined that all data in the ordinary volume is migrated, all data in the ordinary volume may be deleted, so as to store other data subsequently; or the normal volume can be deleted directly, that is, the data in the whole normal volume and the normal volume are all deleted.
Based on any of the embodiments of the present invention, in order to save the storage space utilization of the full flash volume, all zero data in the migrated data may be filtered, and specifically, after reading data specified by the data migration instruction from the normal volume specified by the source volume information, before storing the data in the target volume, the method further includes:
step 11: and judging whether the data is all zero data.
The method for determining whether the data is all-zero data can refer to the related art, and is not described herein again. Before determining whether the data is all-zero data, it may also be determined whether the data contains an autodelete flag, or whether the autodelete flag exists in the data migration instruction, and when the data or the data migration instruction contains the autodelete flag, it is described that the data is migrated data, and it is necessary to determine whether the data is all-zero data. And thus a zerohit flag is added thereto, and when the zerohit flag is detected, an operation of determining whether the data is all-zero data is performed. When the autodelete mark is not marked, the data is indicated to be backup data or data used for other operations or services, and no all-zero data judgment is needed.
Step 12: if not, the operation of storing the data into the target volume is executed.
When the data is not all zero data, the data may be stored in the target volume. When the data is all-zero data, the data can be deleted and not stored in the target volume, so that the storage space utilization rate of the target volume, namely the full-flash volume, is improved.
Based on the foregoing embodiments, a specific data migration method will be described in this embodiment, please refer to fig. 2, where fig. 2 is a flowchart of a specific data migration method provided in an embodiment of the present invention, and the method includes:
step 21: an autodelete state machine is created.
In practical applications, an autodelete state machine is generally used to monitor the whole data migration (or called data synchronization) process. Thus, before data migration is performed, an autodelete state machine needs to be created. The autodelete state machine is used to listen to the data synchronization process (i.e., the data migration process) and monitor the autodelete state.
Step 22: an add disk copy command, a target volume ID, and an autodelete parameter are input.
The add disk copy command is a data migration instruction. The autodelete parameter is used for indicating that the data is migrated data, so that the data is judged to be all zero data in the migration process.
Step 23: data is read from the source volume.
Step 24: a zerohit marker was added.
Since the autodelete parameter is input, the data read from the source volume all contain autodelete markers, and the virtual volume layer adds zerohit markers to the data after detecting the autodelete markers.
Step 25: and judging whether the data is all zero data.
After the zerohit mark is detected, whether the data is all-zero data is judged at the all-flash layer. When the data is all zero data, entering step 106; when the data is not all zero data, step 107 is entered.
Step 26: data is not written to the target volume.
Step 27: the data is written to the target volume.
Step 28: and the autodelete state machine is informed when the synchronization is completed.
The synchronization completion indicates that all data in the source volume is migrated, and in this case, the autodelete state machine is notified that the data migration work for the source volume is completed.
Step 29: the source volume is deleted.
And when the autodelete state machine receives the notification of synchronization completion, judging whether synchronization is completed or not, and judging whether autodelete parameters are input or not. And if the two steps of judgment are yes, namely the autodelete state and the data synchronization state are true, starting a background deletion task and deleting the source volume.
In the following, the data migration apparatus provided by the embodiment of the present invention is introduced, and the data migration apparatus described below and the data migration method described above may be referred to correspondingly.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a data migration apparatus according to an embodiment of the present invention, including:
the instruction obtaining module 310 is configured to obtain a data migration instruction, where the data migration instruction includes source volume information and target volume information;
a target volume determination module 320, configured to determine the full flash volume specified by the target volume information as the target volume;
and the data migration module 330 is configured to read data specified by the data migration instruction from the normal volume specified by the source volume information, and store the data in the target volume.
Optionally, the method further includes:
the judging module is used for judging whether all the data in the common volume are synchronized;
and the deleting module is used for deleting the data in the common volume.
Optionally, the method further includes:
the all-zero judging module is used for judging whether the data is all-zero data;
correspondingly, the data migration module stores the data into the target volume when the data is not all zero data.
Optionally, the method further includes:
the mark judging module is used for judging whether the data contains an autodelete mark;
correspondingly, the all-zero judging module is a module for judging whether the data is all-zero data when the autodelete mark exists in the data migration instruction.
In the following, the data migration apparatus provided by the embodiment of the present invention is introduced, and the data migration apparatus described below and the data migration method described above may be referred to correspondingly.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a data migration device according to an embodiment of the present invention, where the data migration device includes a memory and a processor, where:
a memory 410 for storing a computer program;
the processor 420 is configured to execute a computer program to implement the data migration method.
In the following, the computer-readable storage medium provided by the embodiment of the present invention is introduced, and the computer-readable storage medium described below and the data migration method described above may be referred to correspondingly.
The present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the data migration method described above.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Finally, it should also be noted that, herein, relationships such as first and second, etc., are intended only to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The data migration method, the data migration apparatus, the data migration device, and the computer-readable storage medium provided by the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of data migration, comprising:
acquiring a data migration instruction, wherein the data migration instruction comprises source volume information and target volume information;
determining the full flash volume specified by the target volume information as a target volume;
and reading the data specified by the data migration instruction from the common volume specified by the source volume information, and storing the data into the target volume.
2. The data migration method according to claim 1, further comprising, after storing the data in the target volume:
judging whether all the data in the common volume are migrated or not;
and if so, deleting the data in the common volume.
3. The data migration method according to claim 1, further comprising, after reading the data specified by the data migration instruction from the normal volume specified by the source volume information and before storing the data in the target volume:
judging whether the data is all-zero data or not;
and if not, executing the operation of storing the data into the target volume.
4. The data migration method according to claim 3, further comprising, after reading the data specified by the data migration instruction from the normal volume specified by the source volume information, before determining whether the data is all-zero data:
judging whether the data contains autodelete marks or not;
and if so, executing the operation of judging whether the data is all-zero data.
5. A data migration apparatus, comprising:
the instruction acquisition module is used for acquiring a data migration instruction, and the data migration instruction comprises source volume information and target volume information;
a target volume determining module, configured to determine a full flash volume specified by the target volume information as a target volume;
and the data migration module is used for reading the data specified by the data migration instruction from the common volume specified by the source volume information and storing the data into the target volume.
6. The data migration apparatus according to claim 5, further comprising:
the judging module is used for judging whether all the data in the common volume are migrated;
and the deleting module is used for deleting the data in the common volume.
7. The data migration apparatus according to claim 5, further comprising:
the all-zero judging module is used for judging whether the data is all-zero data;
correspondingly, the data migration module is a module for storing the data into the target volume when the data is not all zero data.
8. The data migration apparatus according to claim 7, further comprising:
the mark judging module is used for judging whether the data contains an autodelete mark;
correspondingly, the all-zero judging module is a module for judging whether the data is all-zero data when the autodelete mark exists in the data migration instruction.
9. A data migration device comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor for executing the computer program to implement the data migration method of any one of claims 1 to 4.
10. A computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the data migration method of any one of claims 1 to 4.
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| CN201911026041.7A CN110750521A (en) | 2019-10-25 | 2019-10-25 | Data migration method, device and equipment and computer readable storage medium |
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| CN201911026041.7A CN110750521A (en) | 2019-10-25 | 2019-10-25 | Data migration method, device and equipment and computer readable storage medium |
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| CN112000279A (en) * | 2020-07-29 | 2020-11-27 | 北京浪潮数据技术有限公司 | Data volume synchronization method, device and medium |
| CN113126924A (en) * | 2021-04-21 | 2021-07-16 | 山东英信计算机技术有限公司 | Data migration method, device and equipment and computer readable storage medium |
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| CN106445421A (en) * | 2016-10-14 | 2017-02-22 | 郑州云海信息技术有限公司 | Storage system data migration method and system |
| CN107656705A (en) * | 2017-10-25 | 2018-02-02 | 郑州云海信息技术有限公司 | A kind of computer-readable storage medium and a kind of data migration method, apparatus and system |
| CN108475229A (en) * | 2016-11-26 | 2018-08-31 | 华为技术有限公司 | Method, host and the solid storage device of Data Migration |
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| CN103052938A (en) * | 2010-10-14 | 2013-04-17 | 株式会社日立制作所 | Data migration system and data migration method |
| CN106445421A (en) * | 2016-10-14 | 2017-02-22 | 郑州云海信息技术有限公司 | Storage system data migration method and system |
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| CN112000279A (en) * | 2020-07-29 | 2020-11-27 | 北京浪潮数据技术有限公司 | Data volume synchronization method, device and medium |
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| CN113126924B (en) * | 2021-04-21 | 2023-02-28 | 山东英信计算机技术有限公司 | Data migration method, device and equipment and computer readable storage medium |
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