CN106598981A - Data migration method and device - Google Patents
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- CN106598981A CN106598981A CN201510673879.0A CN201510673879A CN106598981A CN 106598981 A CN106598981 A CN 106598981A CN 201510673879 A CN201510673879 A CN 201510673879A CN 106598981 A CN106598981 A CN 106598981A
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- 238000013508 migration Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000005516 engineering process Methods 0.000 claims description 28
- 238000010586 diagram Methods 0.000 description 18
- 238000004590 computer program Methods 0.000 description 7
- 238000012217 deletion Methods 0.000 description 6
- 230000037430 deletion Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 230000008447 perception Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- G06F16/21—Design, administration or maintenance of databases
- G06F16/214—Database migration support
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Abstract
The embodiment of the invention discloses a data migration method. The data migration method comprises the following steps: virtualizing a second storage unit the same as a first storage unit according to parameter information of the first storage unit; identifying the second storage unit, and establishing a read-write path with the second storage unit; deleting the read-write path with the first storage unit online; and migrating the data in the first storage unit to the second storage unit. The embodiment of the invention further discloses a data migration device.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a data migration method and apparatus.
Background
With the continuous growth of the services in the telecommunication industry, higher and higher requirements are put forward for the service support system of a telecommunication operator, and for the services which are updated and grow day by day, the service support system needs to timely cope with the continuous updating and updating of equipment, the continuous growth of data input/output and the continuous growth of data capacity, so that the support can be better provided for the healthy development of the services at the later stage.
Data is the key of the core that various services can run and develop smoothly, so in order to ensure that a service support system can run stably and reliably and develop healthily continuously, the updating and upgrading of an old core storage system is inevitable, and a data migration method for migrating data in the old storage system to a new storage system is the key of the core in the updating and upgrading process of the storage system.
A data migration method commonly used in the industry at present is a data migration method based on a storage device, such as: data migration is carried out by various storage bottom layer copying technologies or storage virtualization technologies in the storage system; the data migration method based on the storage device is realized by secondary data encapsulation on the basis of the storage virtualization gateway, and because the virtualization gateway device needs to be additionally added in the storage system, the existing storage system environment is changed, the stability of the whole environment is reduced, and the later maintenance cost is increased.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a data migration method and apparatus, so as to improve the stability of the overall environment of the storage system and reduce the maintenance cost in the later period.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a data migration method, which comprises the following steps:
virtualizing a second storage unit which is the same as the first storage unit according to the parameter information of the first storage unit;
identifying the second storage unit and establishing a read-write path with the second storage unit;
deleting the read-write path with the first storage unit online;
migrating data in the first storage unit to the second storage unit.
In the foregoing method, virtualizing the second storage unit that is the same as the first storage unit includes:
and virtualizing a second storage unit which is the same as the first storage unit by utilizing a storage controller level storage virtualization technology.
In the above method, the deleting the read-write path with the first storage unit online includes:
and deleting the read-write path with the first storage unit online by utilizing a multipath technology.
In the above method, the migrating the data in the first storage unit to the second storage unit includes:
migrating data in the first storage unit to the second storage unit using an in-storage copy technique.
In the above method, the parameter information includes: at least one of a serial number of the storage unit, a number of the storage unit, and controller information of the storage unit.
The present invention also provides a data migration apparatus, characterized in that the apparatus comprises:
the virtual module is used for virtualizing a second storage unit which is the same as the first storage unit according to the parameter information of the first storage unit;
the identification module is used for identifying the second storage unit and establishing a read-write path with the second storage unit;
the deleting module is used for deleting the read-write path with the first storage unit on line;
and the migration module is used for migrating the data in the first storage unit to the second storage unit.
In the above apparatus, the virtualization module is specifically configured to virtualize the second storage unit that is the same as the first storage unit by using a storage controller-level storage virtualization technology.
In the above apparatus, the deleting module is specifically configured to delete the read-write path with the first storage unit online by using a multipath technique.
In the foregoing apparatus, the migration module is specifically configured to migrate the data in the first storage unit to the second storage unit by using an internal storage copy technology.
In the above apparatus, the parameter information includes: at least one of a serial number of the storage unit, a number of the storage unit, and controller information of the storage unit.
According to the data migration method and device provided by the embodiment of the invention, the data migration device firstly acquires the parameter information of the first storage unit, and virtualizes a second storage unit which is the same as the first storage unit by utilizing a storage controller level storage virtualization technology according to the acquired parameter information of the first storage unit; secondly, identifying the second storage unit by utilizing a multipath technology and establishing a read-write path with the second storage unit, wherein the data migration device considers that the second storage unit and the first storage unit are completely the same storage unit, and only channels of the bottom storage unit are added, namely the read-write paths are different; then, deleting the read-write path with the first storage unit on line by utilizing a multipath technology, so that the input/output request of data is switched to the second storage unit under the condition of uninterrupted service; finally, the data in the first storage unit is transferred to a second storage unit on line by using a storage internal copy technology, so that the data required by the service system is directly read and written in the second storage unit; according to the method, additional equipment such as a virtualization gateway is not required to be added in the storage system, so that fault points are reduced, the environment of the existing storage system is not changed, the stability of the overall environment is improved, and the implementation difficulty and the later maintenance cost are reduced; in addition, the data migration process of the method is completely based on hardware equipment of the storage unit, so that the data migration reliability is greatly improved compared with that of software migration, the migration speed is high, data migration among heterogeneous storage units is supported, no downtime is needed in the whole migration process, a shutdown window is completely distinguished, and the non-perception smooth data migration of a service system is realized.
Drawings
FIG. 1 is a flowchart of a first embodiment of a data migration method according to the present invention;
fig. 2 is a schematic diagram of virtualizing a second storage unit that is the same as a first storage unit according to a first embodiment of the data migration method of the present invention;
FIG. 3 is a diagram illustrating online deletion and read/write paths of a first storage unit according to a first embodiment of a data migration method of the present invention;
FIG. 4 is a flowchart of a second embodiment of a data migration method according to the present invention;
fig. 5 is a schematic diagram of virtualizing a second storage disk that is the same as the first storage disk according to a second embodiment of the data migration method of the present invention;
FIG. 6 is a diagram illustrating online deletion and read-write paths of a first storage disk according to a second embodiment of the data migration method of the present invention;
FIG. 7 is a schematic structural diagram of a data migration apparatus according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Fig. 1 is a flowchart of a first embodiment of a data migration method according to the present invention, as shown in fig. 1, the method may include the following steps:
step 101, virtualizing a second storage unit which is the same as the first storage unit according to the parameter information of the first storage unit.
Fig. 2 is a schematic diagram of virtualizing a second storage unit that is the same as a first storage unit according to a first embodiment of the data migration method of the present invention, and as shown in fig. 2, a data migration apparatus, the first storage unit, and the second storage unit are respectively electrically connected to each other, the data migration apparatus acquires parameter information of the first storage unit, virtualizes the second storage unit that is the same as the first storage unit by using a storage controller-level storage virtualization technique according to the acquired parameter information of the first storage unit, so that a mapping relationship is established between the first storage unit and the second storage unit, where the parameter information includes at least one of a serial number of the storage unit, a number of the storage unit, controller information of the storage unit, a model of the storage unit, and a space of the storage unit.
The data migration device can be a server, a controller, an administrator device and the like in the storage system; the first storage unit is a source storage unit, the second storage unit is a target storage unit, wherein the storage unit can be a hard disk, a magnetic disk, a storage tape and the like; in the embodiment of the present invention, the data migration apparatus, the first storage unit, and the second storage unit may be selectively used according to actual requirements, which is not limited herein.
In addition, the storage controller level storage virtualization technology is similar to virtualization of a server, a processor, a memory, an input/output board card and an internal space of physical storage can be integrated and virtualized into a plurality of virtual storage devices, and compared with the traditional storage virtualization technology, the storage controller level storage virtualization technology enables the storage to really become a virtual device without depending on specific physical devices and to become a storage resource pool similar to virtualization of the server, so that the virtual storage devices are always online and services are always online in the process of updating and updating the storage physical devices.
And 102, identifying the second storage unit and establishing a read-write path with the second storage unit.
The data migration device identifies the second storage unit by utilizing a multipath technology (multipath software is installed in the data migration device) and establishes a read-write path with the second storage unit, at this time, the data migration device considers that the second storage unit and the first storage unit are identical storage units, only channels of bottom-layer storage units are added, and front-end port information of each storage unit corresponds to one read-write path, namely, the read-write paths are different.
Specifically, when scanning and identifying a Small Computer System Interface (SCSI) storage unit at the bottom layer, the data migration apparatus initiates a SCSI _ INQUIRY command to query the connected storage unit according to the SCSI protocol specification, and after the storage unit performs feedback, the data migration apparatus can acquire a series of related information such as parameter information of the connected storage unit and front-end port information of the storage unit; because the previously virtualized parameter information of the second storage unit is completely the same as the parameter information of the first storage unit, the data migration apparatus will identify the second storage unit as the first storage unit, and only the read-write path is different from the bottom layer of the first storage unit, that is, the front port information of the two storage units is different, and the other parameter information is the same; and normal read-write access can be provided after multi-path software packaging, and the series of operations are completed under the condition of no perception to the service.
Although the storage unit protects data through a Redundant Array of Independent Disks (RAID) technology, a simple storage unit cannot provide end-to-end protection for the entire read-write system, and a fault occurs in the entire read-write path from the data migration apparatus to the storage unit, such as: the access of data can be interrupted when the switching equipment fails, a connecting cable is disconnected and the like, but the load balance and the fault switching can be realized for the management of the redundant read-write path from the data migration device to the storage unit through the multipath technology, and the uninterrupted operation of services can be ensured.
And 103, deleting the read-write path with the first storage unit online.
Fig. 3 is a schematic diagram of online deletion and read-write path of a first storage unit according to a first embodiment of the data migration method of the present invention, and as shown in fig. 3, a data migration apparatus deletes the read-write path established in advance with the first storage unit online by using a multipath technique, and at this time, all input/output of new data reaches the second storage unit first and then reaches the first storage unit; therefore, under the condition that the service is not interrupted, the data migration device switches the input/output request of the data to the second storage unit, and the dynamic adjustment of the read-write path between the storage units is realized.
And 104, migrating the data in the first storage unit to the second storage unit.
The data migration device utilizes a storage internal copy technology to migrate the data in the first storage unit to the second storage unit on line; after the data migration is completed, removing the mapping relation between the first storage unit and the second storage unit, so that the data required by the service system is directly read and written in the second storage unit, and the data is not read and written in the first storage unit; the data of the business system is migrated from the first storage unit to the second storage unit without any sense and interruption.
According to the data migration method provided by the embodiment of the invention, the dynamic adjustment of the read-write path of the storage unit is realized through the combination of the storage controller level storage virtualization technology and the multipath technology, no additional equipment such as a virtualization gateway is required to be added in the storage system, the number of fault points is reduced, the environment of the existing storage system is not changed, the stability of the overall environment is improved, and the implementation difficulty and the later maintenance cost are reduced; in addition, the data migration process of the method is completely based on hardware equipment of the storage unit, so that the data migration reliability is greatly improved compared with that of software migration, the migration speed is high, data migration among heterogeneous storage units is supported, no downtime is needed in the whole migration process, a shutdown window is completely distinguished, and the non-perception smooth data migration of a service system is realized.
To further illustrate the object of the present invention, the above embodiments are further illustrated.
Fig. 4 is a flowchart of a second embodiment of the data migration method of the present invention, as shown in fig. 4, in the embodiment of the present invention, a storage unit is a disk, and a data migration apparatus is a server; the method comprises the following steps:
step 401, obtaining parameter information of the first storage disk.
The server acquires parameter information of a first storage disk (source disk), wherein the parameter information includes: the serial number of the disk is 12345, the serial number of the disk is 00:00, the disk controller XXA and other information; and acquiring front end port information of the first storage disk, wherein the front end port of the disk is 3E/4E.
Step 402, virtualizing a second storage disk which is the same as the first storage disk according to the parameter information of the first storage disk.
Fig. 5 is a schematic diagram of virtualizing a second storage disk that is the same as the first storage disk according to a second embodiment of the data migration method of the present invention, and as shown in fig. 5, parameter information of the second storage disk (destination disk) is: information such as a disk serial number 56789, a disk serial number 55:55, a disk controller XXB and the like; the front end port of the second storage disk is 5E/6E.
The server virtualizes the acquired related parameter information of the disk serial number 12345, the disk number 00:00, the disk controller XXA and the like of the first storage disk on the second storage disk by using a storage controller level storage virtualization technology, and establishes a mapping relation between the first storage disk and the second storage disk, so that the virtual parameter information of the second storage disk is completely the same as the parameter information of the first storage disk, and only the respective front-end port information is different.
And 403, identifying the second storage disk and establishing a read-write path with the second storage disk.
The server identifies the second virtual storage disk by using a multipath software tool installed in the server in advance and establishes a read-write path with the second virtual storage disk, and at this time, the server considers that the parameter information of the second virtual storage disk is completely consistent with the parameter information of the first storage disk, but the front port information is different, so that the two storage disks are identified as different port disks from the same storage device on a physical layer, namely, the read-write path is established with the front port 5E/6E of the second virtual storage disk.
Specifically, when the server scans and identifies the SCSI storage disk, according to the SCSI protocol specification, the server first initiates an SCSI _ INQUIRY command to query the connected storage disk, and after the storage disk performs feedback, the server can acquire a series of related information such as parameter information of the connected storage disk, front-end port information of the storage disk, and the like; because the parameter information of the virtualized second storage disk is completely the same as the parameter information of the first storage disk, the feedback information obtained by the server is the parameter information from the first storage disk, and therefore the server can identify the second storage disk as the first storage disk, and only the read-write path of the second storage disk is different from the read-write path of the bottom layer of the first storage disk, that is, the front port information of the storage disks of the server is different from that of the first storage disk; and normal read-write access can be provided after multi-path software packaging, and the series of operations are completed under the condition of no perception to the service.
And step 404, deleting the read-write path with the first storage disk online.
Fig. 6 is a schematic diagram of online deletion of a read-write path with a first storage disk according to a second embodiment of the data migration method of the present invention, and as shown in fig. 6, after establishing a read-write path with a virtualized second storage disk, a server online deletes the read-write path established in advance with the first storage disk, where all input/output of new data first reaches the virtualized second storage disk and then reaches the first storage disk; therefore, under the condition that the service is not interrupted, the server switches the input/output request of the data to the second storage disk, and the dynamic adjustment of the read-write path between the storage disks is realized.
Step 405, migrating the data in the first storage disk to the second storage disk.
The server utilizes a storage internal copy technology to online migrate the data in the first storage disk to the second storage disk; after the data migration is completed, removing the mapping relation between the first storage disk and the second storage disk, so that the data required by the service system is directly read and written in the second storage disk, and the data is not read and written in the first storage disk; the data of the business system is migrated from the first storage disk to the second storage disk without any sense and interruption.
According to the data migration method provided by the embodiment of the invention, the dynamic adjustment of the read-write path of the storage disk is realized through the combination of the storage controller level storage virtualization technology and the multi-path technology, no additional equipment such as a virtualization gateway is required to be added in the storage system, the number of fault points is reduced, the environment of the existing storage system is not changed, the stability of the overall environment is improved, and the implementation difficulty and the later maintenance cost are reduced; in addition, the data migration process of the method is completely based on hardware equipment of a storage disk, so that the data migration reliability is greatly improved compared with that of software migration, the migration speed is high, data migration among heterogeneous storage units is supported, no downtime is needed in the whole migration process, a shutdown window is completely distinguished, and the non-perception smooth data migration of a service system is realized.
Fig. 7 is a schematic structural diagram of an embodiment of a data migration apparatus of the present invention, and as shown in fig. 7, the data migration apparatus 07 includes: a virtual module 071, an identification module 072, a deletion module 073 and a migration module 074; wherein,
the virtual module 071 is configured to virtualize a second storage unit that is the same as the first storage unit according to the parameter information of the first storage unit;
the identification module 072 is configured to identify the second storage unit and establish a read-write path with the second storage unit;
the deleting module 073 is configured to delete the read-write path with the first storage unit online;
the migration module 074 is configured to migrate the data in the first storage unit to the second storage unit.
Further, the virtualization module is specifically configured to virtualize a second storage unit that is the same as the first storage unit by using a storage controller-level storage virtualization technology.
Further, the deleting module is specifically configured to delete the read-write path with the first storage unit online by using a multipath technique.
Further, the migration module is specifically configured to migrate the data in the first storage unit to the second storage unit by using an internal storage copy technology.
Further, the parameter information includes: at least one of a serial number of the storage unit, a number of the storage unit, and controller information of the storage unit.
The apparatus of this embodiment may be configured to implement the technical solutions of the above-described method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
In practical application, the virtual module 071, the identification module 072, the deletion module 073, and the migration module 074 may be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array (FPGA) located on a terminal.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method of data migration, the method comprising:
virtualizing a second storage unit which is the same as the first storage unit according to the parameter information of the first storage unit;
identifying the second storage unit and establishing a read-write path with the second storage unit;
deleting the read-write path with the first storage unit online;
migrating data in the first storage unit to the second storage unit.
2. The method of claim 1, wherein virtualizing a second storage unit that is the same as the first storage unit comprises:
and virtualizing a second storage unit which is the same as the first storage unit by utilizing a storage controller level storage virtualization technology.
3. The method of claim 1, wherein deleting the read-write path with the first storage unit online comprises:
and deleting the read-write path with the first storage unit online by utilizing a multipath technology.
4. The method of claim 1, wherein the migrating the data in the first storage unit to the second storage unit comprises:
migrating data in the first storage unit to the second storage unit using an in-storage copy technique.
5. The method according to any of claims 1 to 4, wherein the parameter information comprises: at least one of a serial number of the storage unit, a number of the storage unit, and controller information of the storage unit.
6. An apparatus for data migration, the apparatus comprising:
the virtual module is used for virtualizing a second storage unit which is the same as the first storage unit according to the parameter information of the first storage unit;
the identification module is used for identifying the second storage unit and establishing a read-write path with the second storage unit;
the deleting module is used for deleting the read-write path with the first storage unit on line;
and the migration module is used for migrating the data in the first storage unit to the second storage unit.
7. The apparatus of claim 6, wherein the virtualization module is specifically configured to virtualize a second storage unit that is the same as the first storage unit using a storage controller-level storage virtualization technique.
8. The apparatus of claim 6, wherein the deleting module is specifically configured to delete the read/write path with the first storage unit online by using a multi-path technique.
9. The apparatus according to claim 6, wherein the migration module is specifically configured to migrate the data in the first storage unit to the second storage unit using an internal storage copy technique.
10. The apparatus according to any one of claims 6 to 9, wherein the parameter information comprises: at least one of a serial number of the storage unit, a number of the storage unit, and controller information of the storage unit.
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Application publication date: 20170426 |