WO2010037348A1 - 数据迁移方法、系统、数据迁移服务器及数据接口服务器 - Google Patents
数据迁移方法、系统、数据迁移服务器及数据接口服务器 Download PDFInfo
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- WO2010037348A1 WO2010037348A1 PCT/CN2009/074230 CN2009074230W WO2010037348A1 WO 2010037348 A1 WO2010037348 A1 WO 2010037348A1 CN 2009074230 W CN2009074230 W CN 2009074230W WO 2010037348 A1 WO2010037348 A1 WO 2010037348A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0647—Migration mechanisms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0604—Improving or facilitating administration, e.g. storage management
- G06F3/0605—Improving or facilitating administration, e.g. storage management by facilitating the interaction with a user or administrator
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/067—Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
Definitions
- Data migration method system, data migration server, and data interface server
- the present invention relates to the field of data migration technologies, and in particular, to a data migration method, system, data migration server, and data interface server. Background of the invention
- Data migration refers to the process of converting data from one medium to another or from one format to another, such as transferring data from one hard disk to another, or converting a WORD file to PDF. Format files, etc.
- the migrated data cannot be used during the migration process, and the data can be accessed or modified only after the data migration is completed.
- the current general data migration speed is not ideal, especially the migration of massive data, such as migrating large amounts of data in a database to another database. Due to the huge amount of data, it is possible to complete the migration of all data. It takes days or even weeks. During this period, if the user writes or modifies a certain data of the original database, and the data has been migrated to the new database, then all the data is migrated to the new database. After that, the data in the new database will remain in the state before the user's operation, and will not reflect the user's operation, causing the user operation to fail. Therefore, in the existing data migration method, it is generally required to prohibit the user from operating the original data during the data migration process.
- FIG. 1 is a block diagram of an existing data migration system including a raw data server 101, a destination data server 102, a migration server 103, and a data interface server 104.
- the migration server 103 repeatedly performs the operations of reading data from the original data server 101 and migrating to the destination data server 102 until all data migration is completed, during which the data interface server 104 stops transmitting to the user.
- Data manipulation instruction The response, stop the data service, after all data migration is completed, the data interface server 104 modifies the data operation interface from the original pointing to the original data server 101 to point to the destination data server 102, and starts the data service.
- the data migration process will cause the data service to be suspended, and the user will not be able to perform any operation on the data, which will greatly affect the normal data service and bring the user to the data service. Great inconvenience. Summary of the invention
- the embodiment of the invention provides a data migration method, so that the user can still use the data service to operate the data during the data migration process.
- the embodiment of the invention provides a data migration system, so that the user can still use the data service to operate the data during the data migration process.
- the embodiment of the invention provides a data migration server, so that the user can still use the data service during the data migration process to operate the data.
- the embodiment of the invention provides a data interface server, so that the user can still use the data service during the data migration process to operate the data.
- a data migration method comprising:
- the original data is migrated, and during the data migration process, the status flag is set for the original data according to the migration state of the original data;
- the operation instruction is executed according to the status flag of the original data.
- a data migration system comprising:
- Target data server used to save the original data after migration
- a data migration server connected to the original data server, the target data server, and the status tag server, for migrating all the original data in the original data server, and saving the migrated original data to the target data server, and Setting a status flag of the original data according to the migration status of the original data, and saving the status tag corresponding to the original data to the status tag server;
- a status marking server connected to the data migration server, configured to save a status flag set by the data migration server and corresponding to the original data
- a data interface server respectively connected to the original data server, the target data server, and the status tag server, configured to read from the status tag server when receiving an operation instruction of the user on the original data during the data migration process
- the status flag of the original data, and the operation instruction is executed on the original data saved in the original data server, or the migrated original data saved in the target data server.
- a data migration server includes:
- a data migration module for migrating raw data
- a tag setting module configured to be connected to the data migration module, configured to set a status flag for the original data according to a migration state of the original data during the migration of the original data by the data migration module, and the The status tag corresponding to the original data is saved.
- a data interface server comprising:
- An instruction receiving module configured to receive an operation instruction of the user on the original data
- An instruction execution module is connected to the instruction receiving module, and configured to execute an operation instruction received by the instruction receiving module according to a status flag of the original data.
- the present invention migrates the original data, and in the data migration process, according to the migration state of the original data, sets a status flag for the original data; when receiving the operation instruction of the user on the original data , a data migration method, a system, a data migration server, and a data interface service that execute an operation instruction according to a status flag of the original data
- the status of the migration of the original data can be determined by the status flag, thereby determining the operation of the original data or the migrated original data, thereby avoiding problems such as invalid operation of the operation of the data during the data migration process, so that the user Data services can still be used during data migration to manipulate data without stopping the data service during the migration process.
- Figure 1 is a structural diagram of an existing data migration system
- FIG. 2 is a general flowchart of a data migration method according to an embodiment of the present invention.
- FIG. 3 is a specific flowchart of a data migration part of a data migration method according to an embodiment of the present invention.
- FIG. 4 is a specific flowchart of a data service part of a data migration method according to an embodiment of the present invention.
- FIG. 5 is a structural diagram of a data migration system according to an embodiment of the present invention.
- FIG. 6 is a structural diagram of a data migration server according to an embodiment of the present invention.
- FIG. 7 is a structural diagram of a data interface server according to an embodiment of the present invention. Mode for carrying out the invention
- the invention mainly sets a status flag for the original data according to the migration state of the original data when the original data is migrated; in the data migration process, if the operation instruction of the user to the original data is received, the status flag according to the original data Execute the operation instructions.
- Step 201 Perform migration on the original data.
- one raw data can be read and migrated at a time. After the migration is completed, the next original data is read and migrated until all the original data has been migrated. Multiple original data are migrated at the same time. After the original data of one read is migrated, multiple original data are read and migrated until all the original data is migrated.
- the present invention does not limit the specific migration process, and may be adopted. Any existing migration methods, so I won't go into details here.
- Step 202 Set a status flag for the original data according to the migration status of the original data.
- the status data is set for the original data according to the migration status of the original data, for example, the original data setting status of the failure and migration failure is marked as not migrated; the original data to be migrated is being performed.
- the setting status is marked as being migrated; the raw data setting status of the successful migration is marked as migrated, and so on.
- the step of marking the raw data setup status that was not migrated as unmigrated is to set the status flags for all raw data to not migrated before all raw data has been migrated.
- the migration state can be further refined.
- reading and writing data before and after data migration may take a long time.
- the data reading and the data writing medium state can be appropriately increased.
- the status flag also needs to be correspondingly increased, and the specific migration state is divided, and the type of the status flag can be determined according to specific needs.
- the specific status flag can be represented by numbers such as 0, 1, and 2. For example, 0 means no migration, 1 means migration, 2 means migration, and can also be represented by letters A, B, C, etc. Therefore, I will not repeat them here.
- Steps 201 and 202 have no order in actual operation, and the operation of setting the mark and the migration process may be performed synchronously, that is, setting the mark in real time while migrating, or may be unified after a certain period or a certain number of migrations.
- Set the tag here is the clear table dacai is divided into two steps to describe, the actual can be determined according to specific needs.
- Step 203 When receiving an operation instruction of the user on the original data, executing the operation instruction according to the status flag of the original data.
- the operation instruction of the user may be reading, writing, modifying, etc., and the present invention is not limited to specific operation instructions.
- the operation instruction executed according to the status flag of the original data may specifically include: if the status of the original data is marked as not being migrated, executing an operation instruction on the original data that is not migrated; if the status flag is migrated, the original after the migration
- the operation instruction can be directly stopped, and the user is prompted to prompt the user that the original data is being migrated, and the user can perform the operation later; of course, the user can be prompted to predict the completion time of the migration, and let the user Choose to wait or cancel this operation Specifically, how to prompt the user whether to prompt the user, it can be determined according to actual needs, not repeat them here.
- the operation instruction specifically executed in the present invention is not substantially different from the received operation instruction of the original data by the user, but only when the user's operation instruction is executed, the data interface called, that is, the target data of the operation instruction, is based on the original Depending on the migration status of the data, it is not fixed according to the original target data. Of course, if the migration status of the original data is not migrated, the user's operation instruction can be directly executed without changing the data interface invoked by the operation operation instruction.
- FIG. 3 is a specific flowchart of a data migration part of a data migration method according to an embodiment of the present invention. As shown in FIG. 3, the process includes: Step 301: Read raw data.
- Step 302 Set the status of the original data to be marked as being migrated.
- Step 303 Perform migration on the original data. If yes, go to step 304. If it fails, go to step 305.
- Step 304 setting the status of the original data to be marked as migrated.
- Step 305 set the status of the original data to be marked as not migrated.
- Step 306 Determine whether the original data is the last original data that needs to be migrated, and if yes, end the process, otherwise return to step 301.
- FIG. 4 is a specific flowchart of a data service part of a data migration method according to an embodiment of the present invention. As shown in FIG. 4, the process includes:
- Step 401 Receive an operation instruction of the user on the original data.
- Step 402 Read the status flag of the original data. If the status flag is not migrated, go to step 403. If the status flag is migrated, go to step 404. If the status flag is positive. In the migration, step 405 is performed.
- Step 403 Perform an operation instruction on the original data.
- the original data that has not been migrated is operated. For example, if the operation instruction of the user is a write, the original data is written, and the process ends when the operation is completed.
- Step 404 Perform an operation instruction on the migrated original data.
- the original data after the migration is operated. For example, if the operation instruction of the user is a write, the original data after the migration is written, and the flow is terminated after the execution of the operation is completed.
- step 405 the operation instruction is not executed.
- the user's operation instruction may not be executed, and the user may further issue a prompt to prompt the user to try again later, or suspend the execution of the operation instruction, and when the status flag of the original data becomes unmigrated or migrated, the execution step is performed. 403 or 404, the process ends when the operation is completed.
- FIG. 5 is a structural diagram of a data migration system according to an embodiment of the present invention. As shown in FIG. 5, the system includes: a raw data server 501, a target data server 502, a data migration server 503, a status tag server 504, and a data interface server 505.
- the original data server 501 is used to store the original data; it may be a server, or a server group composed of multiple servers, and of course any data storage device.
- the target data server 502 is configured to save the migrated original data; it may be a server, or a server group composed of multiple servers, and may be any data storage device.
- the data migration server 503 is connected to the original data server 501, the target data server 502, and the status tag server 504, respectively, for the original in the original data server 501.
- the data is migrated, the migrated original data is saved in the target data server 502, and a status flag is set for the original data according to the migration status of the original data; and the status tag corresponding to the original data is saved in the status tag server 504.
- the status tag server 504 is connected to the data migration server 503 and is configured to save a status flag corresponding to the original data set by the data migration server 503.
- the data interface server 505 is respectively connected to the original data server 501, the target data server 502, and the status tag server 504, and is used to mark the server from the status when receiving an operation instruction of the user on the original data during the data migration process.
- the status tag corresponding to the original data read in 504 performs corresponding operation instructions on the original data held in the original data server 501 or the migrated original data held in the target data server 502.
- the specific operation of the data migration server 503 for setting the status flag for the original data may be: marking the original data setting status of the failure of the migration and migration failure as not being migrated; marking the original data setting status of the migration being performed as being migrated; The raw data setup status for the successful migration is marked as migrated.
- marking the original data setting status without migration is not migrated, and the status flag of all the original data is preset to not migrated before all the original data is migrated.
- the status tag server 504 can also provide an interface for setting status flags and atomic operations for status flags.
- non-atomic operations can be performed if the service requirements are not high.
- the atomic operation is an inseparable basic operation.
- the data migration server 503 and the data interface server 505 can directly call the function provided by the status tag server 504 through the above interface, and set or read the status flag through the atomic operation of the cartridge. This will alleviate the processing load of the data migration server 503 and the data interface server 505.
- the data interface server 505 executes the specificity of the operation instruction according to the status flag of the original data.
- the operation may be: if the status flag is not migrated, an operation instruction is executed on the original data; if the status flag is migrated, an operation instruction is executed on the migrated original data; if the status flag is being migrated, the execution operation instruction is suspended. After waiting for the status tag of the original data to become unmigrated or migrated, execute the corresponding operation instruction of the unmigrated or migrated state; or execute the operation instruction and prompt the user; or prompt the user to select to wait or cancel the operation. If the user chooses to wait, the operation instruction is suspended, and after waiting for the status flag of the original data to become unmigrated or migrated, the operation instruction is executed; if the cancellation is selected, the operation instruction is not executed.
- the functionality of the status tag server 504 can also be integrated into the data migration server 503, where the system includes:
- the target data server 502 is configured to save the original data after the migration
- the data migration server 503 is configured to migrate all the original data in the original data server 501, save the migrated original data in the target data server 502, and set and save the original data according to the migration state of the original data.
- the status indicator; the data interface server 505 is configured to execute an operation instruction according to the status flag saved in the data migration server 503 when receiving an operation instruction of the user on the original data during the data migration process.
- the original data server 501 and the target data server 502 may also be the same server, and the original data and the migrated original data may be stored in the same server.
- FIG. 6 is a structural diagram of a data migration server according to an embodiment of the present invention. As shown in FIG. 6, the server includes:
- the data migration module 601 is used to migrate the original data.
- the tag setting module 602 is connected to the data migration module 601, and is configured to set a status flag for the original data according to the migration state of the original data in the process of migrating the original data by the data migration module 601, and set the status flag to the original data.
- the status tag corresponding to the data is guaranteed Save.
- the tag setting module 602 saves the status tag corresponding to the original data in the status tag server; if the status tag server is integrated in the data migration server, at this time, the data migration server Can further include:
- the tag saving module 603 is connected to the tag setting module 602 and is used to save the state standard corresponding to the original data.
- the tag setting module 602 saves the status tag corresponding to the original data in the tag saving module 603.
- the tag setting module 602 specifically includes:
- the first setting unit 604 marks the status of the original data setting that has not been migrated and migrated as not migrated.
- the second setting unit 605 marks the status of the original data setting being migrated as being migrated.
- the third setting unit 606 marks the migrated raw data setting status as migrated.
- the number of setting units can be adjusted according to the number of status flags, or can be combined into one setting unit, depending on actual needs.
- FIG. 7 is a structural diagram of a data interface server according to an embodiment of the present invention. As shown in FIG. 7, the server includes:
- the instruction receiving module 701 is configured to receive an operation instruction of the user on the original data.
- the instruction execution module 702 is connected to the instruction receiving module 701, and is configured to execute the operation instruction received by the instruction receiving module 701 according to the status flag of the acquired original data.
- the location of the status tag is different.
- the specific method for the instruction execution module 702 to obtain the status tag corresponding to the original data will be different, for example, read from the status tag server, or read from the data migration server, and so on.
- the instruction execution module 702 specifically includes:
- the second execution unit 704 when the status of the original data is marked as migrated, executing an operation instruction on the migrated original data;
- the third execution unit 705 when the status of the original data is marked as being migrated, suspending execution of the operation instruction, waiting for the status flag of the original data to become unmigrated or migrated, executing the operation instruction in the corresponding state; or not executing the operation instruction And prompt the user; or prompt the user to choose to wait or cancel the operation, if the user chooses to wait, suspend the execution of the operation instruction, wait for the status flag of the original data to become unmigrated or migrated, execute the operation instruction; If canceled, the operation instruction will not be executed.
- the number of execution units can be adjusted according to the number of status flags, or can be combined into one execution unit, depending on actual needs.
- the data migration method, system, data migration server, and data interface server of the present invention can determine the migration state of the original data through the status flag, thereby determining to operate the original data or the migrated original data, thereby avoiding
- the operation failure of the data may cause problems such as operation failure, so that the user can still use the data service during the data migration process, and operate the data without stopping the data service.
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