CN111198845A - Data migration method, readable storage medium and computing device - Google Patents
Data migration method, readable storage medium and computing device Download PDFInfo
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- CN111198845A CN111198845A CN202010089445.7A CN202010089445A CN111198845A CN 111198845 A CN111198845 A CN 111198845A CN 202010089445 A CN202010089445 A CN 202010089445A CN 111198845 A CN111198845 A CN 111198845A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/11—File system administration, e.g. details of archiving or snapshots
- G06F16/119—Details of migration of file systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/13—File access structures, e.g. distributed indices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/17—Details of further file system functions
- G06F16/172—Caching, prefetching or hoarding of files
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/23—Updating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The present disclosure provides a data migration method, the method comprising: the management server receives a data migration instruction; the management server instructs the first storage server to transfer the data to the second storage server according to the data transfer instruction; during data migration, the management server receives a data access request, sends a data query instruction to a second storage server according to the data access request, and sends the data access instruction to a first storage server to instruct the first storage server to perform data read-write operation related to the data access request if the second storage server returns a first message indicating that no data corresponding to the request is queried; and if the second storage server returns a second message indicating that the data corresponding to the request is inquired, sending an access instruction to the second storage server to indicate the second storage server to perform data read-write operation related to the data access request.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a data migration method, a readable storage medium and computing equipment.
Background
With the development of information technology, data becomes an important asset at present. To address data growth and business needs, clustering of data storage devices has become a common consensus in the industry. Data are stored in a scattered mode through a plurality of nodes, so that the data I/O capacity can be greatly improved, and the service response rate is guaranteed. For this reason, a demand for clustered storage management arises.
In a large-scale cloud computing application scenario or a small-scale application scenario with a plurality of main and standby servers, data migration needs to be performed between data storage devices, and the data migration needs to be used for service transfer, data backup and the like. In the migration process, normal business services are often affected, and how to ensure the continuity of the business and reduce the problem of business interruption caused by data migration is the technical problem to be solved by the invention.
Disclosure of Invention
To this end, the present invention provides a data migration method, readable storage medium and computing device in an attempt to solve or at least alleviate at least one of the problems identified above.
According to an aspect of an embodiment of the present invention, there is provided a data migration method, including:
the management server receives a data migration instruction;
the management server instructs the first storage server to transfer the data to the second storage server according to the data transfer instruction;
during data migration, the management server receives a data access request, sends a data query instruction to a second storage server according to the data access request, and sends the data access instruction to a first storage server to instruct the first storage server to perform data read-write operation related to the data access request if the second storage server returns a first message indicating that no data corresponding to the request is queried; and if the second storage server returns a second message indicating that the data corresponding to the request is inquired, sending an access instruction to the second storage server to indicate the second storage server to perform data read-write operation related to the data access request.
Optionally, sending a data access instruction to a first storage server to instruct the first storage server to perform a data read-write operation related to the data access request, specifically including:
if the data access request is a read request, sending a data read instruction to a first storage server to instruct the first storage server to perform data read operation related to the data access request;
and if the data access request is a write request, indicating the first storage server to judge whether the same data can be migrated in the data writing process, if so, executing a normal writing flow, otherwise, indicating the first storage server to perform data writing operation related to the data access request.
Optionally, the determining, by the first storage server, whether migration of the same data occurs in a data writing process includes:
calculating the waiting time of data migration of data corresponding to the data access request;
calculating the duration of the data writing process;
and calculating the difference value between the waiting time of data migration corresponding to the data access request and the duration of the data writing process, if the difference value is greater than a preset threshold value, determining that the same data cannot be migrated in the data writing process, otherwise, determining that the same data can be migrated in the data writing process.
Optionally, calculating a waiting time for data migration of data corresponding to the data access request includes:
acquiring file information and transmission sequences of all data to be synchronized in advance;
and the number of the first and second groups,
acquiring information of a current transmission file of the first storage server;
and calculating the waiting time of data migration corresponding to the data access request according to the information of the current transmission file, the file information of all the data to be synchronized and the transmission sequence.
Optionally, the executing fails to perform a normal write process, including:
storing the data corresponding to the write request locally;
and when the data of the first storage server is determined to be migrated to the second storage server, migrating the data corresponding to the write request of the local storage to the second storage server.
Optionally, after the management server receives the data access request, the method further includes:
if the data access request is a read request, inquiring local storage content, judging whether data corresponding to the read request is stored locally, and if so, reading the data locally and returning the data to a user.
Optionally, after the management server receives the data access request, the method further includes:
if the data access request is a write request, inquiring the content of local storage, judging whether the data corresponding to the write request is stored locally, and if so, overwriting the data corresponding to the write request on the local storage.
According to yet another aspect of embodiments of the present invention, there is provided a readable storage medium adapted to store one or more programs configured to perform the above-described data migration method by a computing device.
According to yet another aspect of an embodiment of the present invention, there is provided a computing device including: one or more processors; a memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors to perform the data migration method described above.
According to the embodiment of the invention, during data migration, the management server receives a data access request, sends a data query instruction to a second storage server according to the data access request, and sends the data access instruction to a first storage server to instruct the first storage server to perform data read-write operation related to the data access request if the second storage server returns a first message indicating that no data corresponding to the request is queried; if the second storage server returns a second message indicating that the data corresponding to the request is inquired, sending an access instruction to the second storage server to indicate the second storage server to perform data read-write operation related to the data access request; the data of the storage server can still be normally accessed during data migration, and meanwhile, read-write conflict of the data is avoided.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a system architecture diagram of an embodiment of the invention;
FIG. 2 illustrates a method flow diagram of an embodiment of the present invention;
figure 3 shows a method flow diagram of a specific embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, an embodiment of the present invention provides a network architecture diagram to assist in explaining the method provided by the present invention. The service server in the service processing layer is used to process service logic, and the management server is an abstract device, and is used to implement management functions of computing resources, for example: task allocation, data routing, inter-layer coupling, data management, etc., and the management server may be one device or may be divided into a plurality of devices according to functions.
As shown in fig. 2, a data migration method according to an embodiment of the present invention includes:
s110, the management server receives a data migration instruction;
s120, the management server instructs the first storage server to transfer the data to the second storage server according to the data transfer instruction;
s130, during data migration, the management server receives a data access request, sends a data query instruction to a second storage server according to the data access request, and sends the data access instruction to a first storage server if the second storage server returns a first message indicating that data corresponding to the request is not queried, and indicates the first storage server to perform data read-write operation related to the data access request; and if the second storage server returns a second message indicating that the data corresponding to the request is inquired, sending an access instruction to the second storage server to indicate the second storage server to perform data read-write operation related to the data access request.
In the embodiment of the invention, when a data access request is received, whether the data corresponding to the data access request is stored or not is preferentially inquired from the second storage server, if so, the data is directly read and written in the second storage server, and compared with the data read and written in the first storage server, the retransfer process of newly written data is reduced; otherwise, the request is still processed by the first storage server.
Further, in step S130, sending a data access instruction to a first storage server, instructing the first storage server to perform a data read-write operation related to the data access request, specifically including:
if the data access request is a read request, sending a data read instruction to a first storage server to instruct the first storage server to perform data read operation related to the data access request;
and if the data access request is a write request, indicating the first storage server to judge whether the same data can be migrated in the data writing process, if so, executing a normal writing flow, otherwise, indicating the first storage server to perform data writing operation related to the data access request.
The embodiment of the invention realizes the normal writing of data in the data migration process, solves the problem that data read-write conflict may occur or the migrated data is damaged, and is particularly suitable for large files or continuous data writing scenes.
Further, the determining, by the first storage server, whether migration of the same data occurs in a data writing process includes:
calculating the waiting time of data migration of data corresponding to the data access request;
calculating the duration of the data writing process;
and calculating the difference value between the waiting time of data migration corresponding to the data access request and the duration of the data writing process, if the difference value is greater than a preset threshold value, determining that the same data cannot be migrated in the data writing process, otherwise, determining that the same data can be migrated in the data writing process.
In the embodiment of the invention, the difference value between the waiting time of data migration corresponding to the data access request and the duration time of the data writing process is calculated, and the difference value is compared with the preset threshold value, so that whether enough time is available for completing the writing of the same data before the data migration occurs is determined, and the condition that data errors are caused by the data migration occurring in the writing process or the data migration fails due to write protection is avoided.
Further, calculating the waiting time for data migration of the data corresponding to the data access request includes:
acquiring file information and transmission sequences of all data to be synchronized in advance;
and the number of the first and second groups,
acquiring information of a current transmission file of the first storage server;
and calculating the waiting time of data migration corresponding to the data access request according to the information of the current transmission file, the file information of all the data to be synchronized and the transmission sequence.
The file information of all the data to be synchronized includes file name and size, and the transmission sequence is usually arranged according to file path or actual storage address. Based on the file information and the transmission sequence of all the data to be synchronized and the information of the current transmission file of the first storage server, the waiting time of data migration of the data corresponding to the data access request can be calculated.
Further, the executing cannot perform a normal write process, including:
storing the data corresponding to the write request locally;
and when the data of the first storage server is determined to be migrated to the second storage server, migrating the data corresponding to the write request of the local storage to the second storage server.
According to the embodiment of the invention, the management server caches the data which cannot be normally written into the first storage server, and the cached data is stored in the second storage server, so that the retention of the normal update information of the data during the data migration is ensured.
Further, after receiving the data access request, the management server further includes:
if the data access request is a read request, inquiring local storage content, judging whether data corresponding to the read request is stored locally, and if so, reading the data locally and returning the data to a user.
According to the embodiment of the invention, after the management server caches the data which cannot be normally written into the first storage server, when the read request of the same data is processed, the management server cache is preferentially inquired, so that the latest data is returned to the user.
Further, after receiving the data access request, the management server further includes:
if the data access request is a write request, inquiring the content of local storage, judging whether the data corresponding to the write request is stored locally, and if so, overwriting the data corresponding to the write request on the local storage.
According to the embodiment of the invention, after the management server caches the data which cannot be normally written into the first storage server, when the write request of the same data is processed, the management server cache is preferentially inquired, and the original cache content is covered by the write request data, so that the data in the cache is ensured to be updated in real time. After the second storage server completes the data migration, only the latest cache content needs to be written into the second storage server.
To facilitate understanding of the concept of the present invention, a specific embodiment is described below, as shown in fig. 3, comprising the steps of:
s200, the management server receives a data migration instruction;
s210, the management server indicates the first storage server to transfer data to the second storage server;
s220, the management server receives a data writing request in the data migration process;
s230, whether the local cache has data to be updated or not is judged, and if yes, S240 is executed; otherwise, executing S250;
s240, the management server updates the data to a local cache;
s250, whether the second storage server has data to be updated or not is judged, and if yes, S260 is executed; otherwise, executing S270;
s260, the management server updates the data to a second storage server;
s270, whether the first storage server has enough waiting time or not is judged, and if yes, S280 is executed; otherwise, go to S290;
s280, the management server updates the data to the first storage server;
and S290, the management server writes the data into the local cache.
For a large-capacity storage cluster, data migration between devices often takes hours or even days, during which, in order to ensure service continuity and avoid bringing excessive pressure to a cache space of a management server, data updates are distributed in a first storage server, a second storage server and a management server cache, and the management server cache data is updated to the second storage server along with the completion of the data migration, thereby completing the data migration and ensuring the service continuity in the data migration process.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with hardware via a program, and the program may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc-Read-Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of data migration, the method comprising:
the management server receives a data migration instruction;
the management server instructs the first storage server to transfer the data to the second storage server according to the data transfer instruction;
during data migration, the management server receives a data access request, sends a data query instruction to a second storage server according to the data access request, and sends the data access instruction to a first storage server to instruct the first storage server to perform data read-write operation related to the data access request if the second storage server returns a first message indicating that no data corresponding to the request is queried; and if the second storage server returns a second message indicating that the data corresponding to the request is inquired, sending an access instruction to the second storage server to indicate the second storage server to perform data read-write operation related to the data access request.
2. The method of claim 1, wherein sending a data access instruction to a first storage server to instruct the first storage server to perform a data read/write operation related to the data access request includes:
if the data access request is a read request, sending a data read instruction to a first storage server to instruct the first storage server to perform data read operation related to the data access request;
and if the data access request is a write request, indicating the first storage server to judge whether the same data can be migrated in the data writing process, if so, executing a normal writing flow, otherwise, indicating the first storage server to perform data writing operation related to the data access request.
3. The method of claim 2, wherein the determining whether migration of the same data occurs during the data writing process by the first storage server comprises:
calculating the waiting time of data migration of data corresponding to the data access request;
calculating the duration of the data writing process;
and calculating the difference value between the waiting time of data migration corresponding to the data access request and the duration of the data writing process, if the difference value is greater than a preset threshold value, determining that the same data cannot be migrated in the data writing process, otherwise, determining that the same data can be migrated in the data writing process.
4. The method of claim 3, wherein calculating a latency for data migration to occur for data corresponding to the data access request comprises:
acquiring file information and transmission sequences of all data to be synchronized in advance;
and the number of the first and second groups,
acquiring information of a current transmission file of the first storage server;
and calculating the waiting time of data migration corresponding to the data access request according to the information of the current transmission file, the file information of all the data to be synchronized and the transmission sequence.
5. The method of claim 2, wherein the performing the abnormal write flow comprises:
storing the data corresponding to the write request locally;
and when the data of the first storage server is determined to be migrated to the second storage server, migrating the data corresponding to the write request of the local storage to the second storage server.
6. The method of claim 5, wherein after the management server receives the data access request, further comprising:
if the data access request is a read request, inquiring local storage content, judging whether data corresponding to the read request is stored locally, and if so, reading the data locally and returning the data to a user.
7. The method of claim 5, wherein after the management server receives the data access request, further comprising:
if the data access request is a write request, inquiring the content of local storage, judging whether the data corresponding to the write request is stored locally, and if so, overwriting the data corresponding to the write request on the local storage.
8. A readable storage medium adapted to store one or more programs configured to perform the data migration method of any of claims 1-7 by a computing device.
9. A computing device, comprising:
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors to perform the data migration method of any of claims 1-7.
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| CN111198845B (en) | 2023-07-21 |
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