CN105549904B - A kind of data migration method and storage equipment applied in storage system - Google Patents

A kind of data migration method and storage equipment applied in storage system Download PDF

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Publication number
CN105549904B
CN105549904B CN201510897518.4A CN201510897518A CN105549904B CN 105549904 B CN105549904 B CN 105549904B CN 201510897518 A CN201510897518 A CN 201510897518A CN 105549904 B CN105549904 B CN 105549904B
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logical volume
storage equipment
data
address
data migration
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CN105549904A (en
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熊小勇
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STATE INFORMATION CENTER
Huawei Technologies Co Ltd
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STATE INFORMATION CENTER
Huawei Technologies Co Ltd
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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
    • G06F3/0662—Virtualisation aspects
    • G06F3/0665—Virtualisation aspects at area level, e.g. provisioning of virtual or logical volumes
    • 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
    • G06F3/061—Improving I/O performance
    • 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
    • G06F3/0614—Improving the reliability of storage systems
    • 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
    • G06F3/0638—Organizing or formatting or addressing of data
    • G06F3/064—Management of blocks
    • 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]

Abstract

The invention discloses a kind of data migration method applied in storage system and storage equipment, for solving the technical issues of needing interrupting service when carrying out Data Migration at present.When the Data Migration in the first logical volume to second is stored equipment, second storage equipment can create the second logical volume, and the data of the first logical volume can be stored to the second logical volume, in data migration process, second storage equipment can receive the access request for the first logical volume that host is handed down to originally in the first storage equipment, then the second storage equipment can execute the access request, without interrupting original business in this way in data migration process, realize the continuity of business.

Description

A kind of data migration method and storage equipment applied in storage system
Technical field
The present invention relates to the communications field, in particular to a kind of data migration method and storage applied in storage system is set It is standby.
Background technique
With the continuous development of information technology (Information Technology, IT), cloud computing system is on-demand with it The unique business model and IT of payment are the convenient delivery method serviced, are increasingly becoming for building overturning for data center Property strength.Cloud computing system allow user do not have to again too much pay close attention to IT infrastructure realization details, without purchase IT hardware, It need to only propose the IT resource requirement for being suitble to oneself business to need, cloud computing system can be in infrastructure such as calculating, network, storages Chi Zhong, dispatches the service operation needs that corresponding resource meets user, and user need to only pay for used IT resource.
In general, cloud computing system includes the different data centers positioned at multiple regions, it include more in each data center A different types of storage equipment.The business of some users is wider, may be related in different regions or different data The heart, then these users when using cloud computing system, are related to the migration of data sometimes, such as will in different region or The migration of data is carried out between different data centers.
Current Data Transference Technology is typically necessary to be manually operated by user and complete, and needs temporarily in transition process When interrupt original business, cause business discontinuous phenomenon occur, influence the normal use of user.
Summary of the invention
The application provides a kind of data migration method applied in storage system and storage equipment, exists at present for solving Carry out the technical issues of needing interrupting service when Data Migration.
In a first aspect, providing a kind of data migration method applied in storage system, the storage system includes first Store equipment and the second storage equipment.In the method, the second storage equipment refers in the Data Migration for receiving server transmission After order, the second storage equipment can be instructed according to Data Migration creates the second logical volume in the second storage equipment.Wherein, data Migration instruction is used to indicate the Data Migration stored in the first logical volume in equipment by first and stores equipment to second, and data are moved It include the capacity information of the first logical volume to be migrated in shifting instruction, the first logical volume is used to store the data that host issues, Also, the capacity of the second logical volume is not less than the capacity of the first logical volume.After creating the second logical volume, the second storage equipment root The data for the first logical volume that will acquire according to the instruction of received Data Migration are stored in the second logical volume.Also, according to data During the data for the first logical volume that migration instruction will acquire are stored in the second logical volume, the second storage equipment be can receive The access request that host issues, address to be visited is carried in access request, and address to be visited is the address of the first logical volume.? After receiving access request, the second storage equipment may determine that whether the data of address to be visited have been copied into the second logic Volume, when the data of address to be visited have been copied into the second logical volume, the second storage equipment is according to access request access the Two logical volumes.When the data of address to be visited are not yet copied into the second logical volume, the second storage equipment is according to access request Access the first logical volume.
In the application, by the Data Migration in the first logical volume to another piece of storage equipment (the i.e. second storage equipment) When, the second storage equipment can create the second logical volume, and the data of the first logical volume be stored to the second logical volume, and in number According in transition process, the second storage equipment can receive the visit for the first logical volume that host is handed down to originally in the first storage equipment Ask request, then the second storage equipment can execute the access request.Without interrupting original industry in this way in data migration process Business, realizes the continuity of business.It can be seen that the data migration process in the application is automatically performed by equipment, it is not necessarily to User's manual operation, mitigates the burden of user, bring maloperation due to user manually performs also is reduced, in addition, moving in data During shifting, without interrupting original business, guarantees the lasting progress of business, do not influence the normal use of user as far as possible, improve The reliability of system.
With reference to first aspect, in the first possible implementation of the first aspect, clothes are received in the second storage equipment It is engaged in after the Data Migration instruction that device is sent, the second storage equipment instructs according to Data Migration and creates generation in the second storage equipment Manage logical volume, wherein the ID of Agent logic volume is identical as the ID of the first logical volume.Later, the ID based on Agent logic volume, second The access request that storage equipment receiving host issues.Wherein, after creation Agent logic volume, between the second storage equipment and host Path be activated, and first storage equipment and host between path it is disabled.
In the application, enable Agent logic roll up ID it is identical with the first logical volume, host just will be considered that Agent logic volume and First logical volume is same logical volume, and after creation Agent logic volume, the path between the first storage equipment and host is banned With such host, should be by the first storage received access request of equipment when sending the access request for being directed to the first logical volume It will be received by the second storage equipment, so that the second storage equipment can respond access request, be equivalent to agency and patrol The cigarette pipe business of the first logical volume is collected, ensure that business is not interrupted in data migration process.
With reference to first aspect or the first possible implementation of first aspect, second in first aspect are possible In implementation, further includes: if access request be write request, when in the first logical volume and the second logical volume to be visitedly Location not stored data when, second storage equipment according to access request access the second logical volume.
If all not having storing data inside the address to be visited in two logical volumes, show that the write request is that request write-in is new Data, then, it is subsequent also to need the data moving to the second logical volume again if writing new data into the first logical volume, Therefore in the application, the second logical volume can be directly write new data into, reduces data migration process, improves Data Migration effect Rate.
With reference to first aspect or the first possible implementation or second of possible implementation of first aspect, exist In the third possible implementation of first aspect, further includes: will acquire in the second storage equipment according to Data Migration instruction The data of the first logical volume be stored in after the second logical volume, the second storage equipment controls the second logical volume and inherits Agent logic The ID of volume.
After the completion of data all migrate, the second logical volume can be enabled to inherit the ID of Agent logic volume, in this way, the first logic Data in volume have not only all moved to the second logical volume, and the business of the first logical volume is also connect by the second logical volume completely Pipe, business will not interrupt.And because the ID of the first logical volume is identical as the ID of the second logical volume, feel substantially for host By less than storage location what is had change, without additional response or operation is made, mitigates the burden of host.
Second aspect, provides a kind of data migration method applied in storage system, and the storage system includes first Storing equipment and the second storage equipment, which comprises the second storage equipment receives the Data Migration instruction that server is sent, Data Migration instruction is used to indicate the Data Migration stored in the first logical volume in equipment by first and stores equipment, number to second According to the capacity information in migration instruction including the first logical volume to be migrated, the first logical volume is for storing the number that host issues According to.After receiving Data Migration instruction, the second storage equipment instructs according to Data Migration and creates second in the second storage equipment Logical volume, wherein the capacity of the second logical volume is not less than the capacity of the first logical volume.Later, the second storage equipment is according to data The data for the first logical volume that migration instruction will acquire are stored in the second logical volume.In the will acquire according to Data Migration instruction During the data of one logical volume are stored in the second logical volume, the access request that the second storage equipment receiving host issues is visited It asks and carries the first address in request, the first address is the address of the first logical volume to be visited, if access request is write request, Second storage equipment determines that the second address, the second address are the address of the second logical volume, the second storage equipment according to the first address The second logical volume is accessed according to the second address.
In the application, when the Data Migration in the first logical volume to second is stored equipment, the second storage equipment can To create the second logical volume, and the data of the first logical volume are stored to the second logical volume, and in data migration process, second Storage equipment can receive the access request for the first logical volume that host is handed down to originally in the first storage equipment, then the second storage Equipment can execute the access request.Without interrupting original business in this way in data migration process, the company of business is realized Continuous property.And if access request is write request, write request can directly be requested the data of write-in by the second storage equipment The second logical volume is written, reduces this partial data and migrates the workload to come from the first logical volume again, improves Data Migration effect Rate.
In conjunction with second aspect, in the first possible implementation of the second aspect, clothes are received in the second storage equipment It is engaged in after the Data Migration instruction that device is sent, the second storage equipment instructs according to Data Migration and creates generation in the second storage equipment Manage logical volume, wherein the ID of Agent logic volume is identical as the ID of the first logical volume.Later, the ID based on Agent logic volume, second It stores equipment and receives access request, wherein after creation Agent logic volume, the path between the second storage equipment and host is opened With, and the path between the first storage equipment and host is disabled.
In the application, enable Agent logic roll up ID it is identical with the first logical volume, host just will be considered that Agent logic volume and First logical volume is same logical volume, and after creation Agent logic volume, the path between the first storage equipment and host is banned With such host, should be by the first storage received access request of equipment when sending the access request for being directed to the first logical volume It will be received by the second storage equipment, so that the second storage equipment can respond access request, be equivalent to agency and patrol The cigarette pipe business of the first logical volume is collected, ensure that business is not interrupted in data migration process.
In conjunction with the first possible implementation of second aspect, in second of possible implementation of second aspect In, the method also includes: the second logical volume is stored in the data for the first logical volume that will acquire according to Data Migration instruction During, the second storage equipment judges the data stored in the first address in the first logical volume to be migrated in the second logic Whether updated in volume, if the data stored in the first address have updated in the second logical volume, the second storage equipment is not moved Move the data stored in the first address.
Because, if access request is write request, directly having write data into the second logical volume in second aspect, because Update has been obtained in some data in this possible first logical volume in the second logical volume, then this portion in the first logical volume Divided data is just not necessarily to migration, has otherwise not only aggravated the workload of Data Migration, also makes data in the second logical volume again The data not updated are reduced into, data storage is may cause and mistake occurs.It therefore, can when carrying out Data Migration in the application It to judge whether data to be migrated have update in the second logical volume, is not just migrated if there is updating, reduces number According to the workload of migration, the corrupt data stored in the second logical volume is also avoided.
In conjunction with the first possible implementation of second aspect, in the third possible implementation of second aspect In, the method also includes: if access request be read request, second storage equipment judge the first address data whether by Copy the second logical volume to.When the data of the first address have been copied into the second logical volume, the second storage equipment is according to visit It asks and requests access to the second logical volume, alternatively, when the data of address to be visited are not yet copied into the second logical volume, the second storage Equipment accesses the first logical volume according to access request.
If access request is read request, that is, host needs read data from logical volume, and therefore, second deposits Storage equipment can determine that read request requests which logical volume is the data read be located at actually, so that corresponding logical volume is accessed, To guarantee to read the requested data of read request.
It can in conjunction with the first possible implementation to any one of the third possible implementation of second aspect The implementation of energy, in the fourth possible implementation of the second aspect, the method also includes: equipment is stored second After the data for the first logical volume that will acquire according to Data Migration instruction are stored in the second logical volume, the second storage equipment control Second logical volume inherits the ID of Agent logic volume.
After the completion of data all migrate, the second logical volume can be equally enabled to inherit the ID of Agent logic volume, in this way, first Data in logical volume have not only all moved to the second logical volume, and the business of the first logical volume is also completely by the second logical volume It is taken over, business will not interrupt.
The third aspect provides the first storage equipment, in a possible design, wraps in the structure of the storage equipment Processor and receiver are included, the processor is configured to storage equipment is supported to execute corresponding function in the method for first aspect Energy.The receiver be used for supports storage equipment and host between communication, receiving host transmission first aspect method in Related message or instruction.The storage equipment can also include memory, and the memory is used to couple with processor, It saves the necessary program instruction of storage equipment and data.
Fourth aspect provides second of storage equipment, in a possible design, wraps in the structure of the storage equipment Processor and receiver are included, the processor is configured to storage equipment is supported to execute corresponding function in the method for second aspect Energy.The receiver be used for supports storage equipment and host between communication, receiving host transmission second aspect method in Related message or instruction.The storage equipment can also include memory, and the memory is used to couple with processor, It saves the necessary program instruction of storage equipment and data.
5th aspect provides the third storage equipment, which includes for executing method described in first aspect Module.
6th aspect, provides the 4th kind of storage equipment, which includes for executing method described in second aspect Module.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention Attached drawing is briefly described, it should be apparent that, attached drawing described below is only some embodiments of the present invention.
Fig. 1 is the first schematic diagram of cloud computing system in the embodiment of the present invention；
Fig. 2 is the flow chart of the first data migration method in the embodiment of the present invention；
Fig. 3 is second of schematic diagram of cloud computing system in the embodiment of the present invention；
Fig. 4 is the flow chart of second of data migration method in the embodiment of the present invention；
Fig. 5 is the third schematic diagram of cloud computing system in the embodiment of the present invention；
Fig. 6 is the 4th kind of schematic diagram of cloud computing system in the embodiment of the present invention；
Fig. 7 is the first structural schematic diagram of the second storage equipment in the embodiment of the present invention；
Fig. 8 is second of structural schematic diagram of the second storage equipment in the embodiment of the present invention；
Fig. 9 is the first structural block diagram of the second storage equipment in the embodiment of the present invention；
Figure 10 is second of structural block diagram of the second storage equipment in the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical solution in the embodiment of the present invention is explicitly described.
Hereinafter, the part term in the embodiment of the present invention is explained.
1) block stores, and is known as storage equipment in the embodiment of the present invention, block storage be it is a kind of based on storage network, can be elastic Raw block-level storage extending, being managed and be used by cloud computing system.It can establish in each piece of storage One or more logical volumes (Logical Volume), logical volume can be used for storing data.Block storage is mounted to cloud computing system Usage mode after system and the usage mode of existing common hard disc are almost the same.
Block storage may include different type, such as may include solid state hard disk (Solid State Drives, SSD) The block of type stores, and can also include serial hard disk interface technology (Serial Advanced Technology Attachment, SATA) type block storage, etc., the performance of different types of piece of storage is different, and user can be according to oneself Needs come select using different types of piece store.
2) logical volume, is a kind of disk management mode, it is therefore an objective to which hard drive space is jumped from the way to manage of physical hard disk Out, more easily unified management distribution is carried out.In simple terms, the storage region that logical volume can be interpreted as on hard disk.
Different block storages can provide the logical volume of different classes of (Volume Type), such as SSD can be provided and be had The logical volume of the access ability of superior performance, such as this logical volume is known as ssd_volume_tyte such as SATA can There is the logical volume of the storage capacity of larger capacity with offer, such as this logical volume is known as sata_volume_type, etc. Deng.User can need to select the block storage of respective classes to establish using the logical volume needed according to oneself business.
3) term in the embodiment of the present invention " system " and " network " can be used interchangeably." multiple " refer to two or two More than."and/or" describes the incidence relation of affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, it can be with table Show: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character "/", unless otherwise specified, generally Indicate that forward-backward correlation object is a kind of relationship of "or".
The application scenarios of the embodiment of the present invention are introduced first.
Common cloud computing environment is made of the data center positioned at multiple and different regions (Region), the number of each region It is divided into multiple Free Region (Availability again according to requirements such as its scale, range of management, failure domains according to center Zone, AZ).It again include multiple storage equipment (i.e. block storage) inside each AZ, storage equipment can be in cloud computing system Using offer memory space.
It referring to Figure 1, is a kind of schematic diagram of cloud computing system in the embodiment of the present invention.
In Fig. 1, service door (Service Portal) is used for provide service door using the user of the cloud computing system Family, for example, Service Portal can provide interactive interface, on the interactive interface, user can apply using the cloud meter Cloud resource (such as computing resource, Internet resources or storage resource etc.) in each region of calculation system covering, user can lead to It crosses the interactive interface and configures the resource of these applications to run the business of oneself.Therefore, in the embodiment of the present invention, user need into When row Data Migration, request message can be sent by Service Portal, therefore can increase newly in the embodiment of the present invention several Class request message, for example, the Data Migration in cloud computing system includes several different modes: 1, in the same AZ not Migration between same storage equipment, such as can be set from the storage of storage equipment transportation to another type of a type It is standby；2, it is migrated between the different AZ of same region；3, it is migrated between different regions.Wherein, it moves for the 1st kind and the 2nd kind Shifting mode is all in same data center's internal migration, and the 3rd kind of mode is migrated between different data centers.For example, this The request message for these types of Data Migration mode can be increased in inventive embodiments newly respectively, cloud computing system passes through Service Portal receives the request message that user sends, and carries out different Data Migration behaviour further according to the type of request message Make.
Cloud controller cluster (Cloud Controller Cluster) can control each of cloud computing system covering Physical entity in region (for example including server, storage equipment or the network equipment etc.).Cloud controller cluster can receive The request message that Service Portal is sent, and request message controls corresponding physical entity progress accordingly based on the received Operation.Wherein, cloud controller cluster and Service Portal can be the different function that same functional entity is realized, Huo Zheye It can be by the different function of different functional entity realizations, the embodiment of the present invention is with no restriction.
It is general followed by cloud resource pond, including computing resource pool, memory resource pool and Internet resources pond, cloud resource pond It is to be made of physical entity, for example including server (Server), storage equipment or the network equipment etc..Setting in cloud resource pond It is standby that multiple regions are divided into according to the position of deployment again, such as it is located at Pekinese region, positioned at the region in Shanghai, etc..In Fig. 1 only Depict the structure of Pekinese region.Special network (such as wide area network (Wide Area can be passed through between different regions Network, WAN)) it is attached.
Inside a region, and multiple AZ can be divided into, depict two for including under the region of Beijing as shown in figure 1 AZ, i.e. AZ1 and AZ2.Can wherein there are several servers for providing computing resource under each AZ, there can also be multiple storages Equipment provides storage resource, etc..Dedicated network connection, such as storage region can be passed through between server and storage equipment Network (Storage Area Network, SAN), for carrying out data access.
Example includes two storage equipment in AZ1 as shown in figure 1, respectively storage equipment 1 and storage equipment 2, such as storage is set Standby 1 is the storage equipment of SSD type, and storage equipment 2 is the storage equipment of SATA type.
In addition, virtual machine monitor (Hypervisor) can be disposed on each host, for virtual to host implementation Change, such as multiple virtual machines (Virtual Machine, VM) can be created, is showd that in the host 1 and host 2 of example as shown in figure 1 Some virtual machines (such as VM3, VM4 and VM5 in the VM1 and VM2 and host 2 in host 1).It can also be in host It disposes multi-path software (MultiPath), can establish mulitpath into the SAN between storage equipment in virtual machine, such as For the path input/output (input/output, I/O), thus guarantee the reliability of I/O, and MultiPath can be used for controlling Coordinate these paths.What user generally used is all virtual machine, that is, user is that storage equipment is accessed by virtual machine.
It may include controller (controller) in storage equipment, it is complete for receiving the order of cloud controller cluster At work such as the creation of logical volume, mappings.For example, all storage equipment under an AZ can share a controller, or All storage equipment under one region can share a controller or each control for storing equipment and can having oneself Device, etc., the embodiment of the present invention to this with no restriction.
Have been described above in front, Data Migration may relate to various ways, in the embodiment of the present invention mainly with It is illustrated for migration between the different storage equipment under same AZ.
The preferred embodiment of the invention is introduced with reference to the accompanying drawing.
Fig. 2 is referred to, the embodiment of the present invention provides the first applied to the data migration method in storage system, the storage System may include the first storage equipment and the second storage equipment, such as the first storage equipment depositing where data to be migrated Equipment is stored up, the second storage equipment is that the purpose of Data Migration stores equipment.This method can be executed by the second storage equipment.Such as First storage equipment can be the storage equipment 1 in Fig. 1, and the second storage equipment is the storage equipment 2 in Fig. 1, or such as first Storage equipment can be the storage equipment 2 in Fig. 1, and the second storage equipment is the storage equipment 1 in Fig. 1.The process of this method is retouched It states as follows.
Step 201: the second storage equipment receives the Data Migration instruction that server is sent, and Data Migration instruction is used to indicate By first store equipment in the first logical volume in Data Migration to second storage equipment, Data Migration instruction in include to The capacity information of first logical volume of migration, the first logical volume is for storing the data that host issues；
Step 202: the second storage equipment instructs according to Data Migration and creates the second logical volume in the second storage equipment, In, the capacity of the second logical volume is not less than the capacity of the first logical volume；
Step 203: the second storage equipment is stored in the according to the data of the first logical volume that Data Migration instruction will acquire Two logical volumes；
Step 204: the data for the first logical volume that will acquire according to Data Migration instruction are stored in the mistake of the second logical volume Cheng Zhong, second stores the access request that equipment receiving host issues, and carries address to be visited, address to be visited in access request For the address of the first logical volume；Wherein, step 204- step 207 can occur in the implementation procedure of step 203；
Step 205: the second storage equipment judges whether the data of address to be visited have been copied into the second logical volume；If The data of address to be visited have been copied into the second logical volume, execute step 206, no to then follow the steps 207；
Step 206: when the data of address to be visited have been copied into the second logical volume, the second storage equipment is according to visit It asks and requests access to the second logical volume；
Step 207: when the data of address to be visited are not yet copied into the second logical volume, the second storage equipment is according to visit It asks and requests access to the first logical volume.
Optionally, the second storage equipment can be determined by server, which may include foregoing cloud control Device cluster, or may include foregoing cloud controller cluster and Service Portal.For example, server receives user The request message of transmission, the request message are used to request the type of logical volume (such as being known as the first logical volume) to be migrated more Being changed to the first kind, then server can determine the second storage equipment according to request message from the storage equipment of the first kind, Wherein the active volume of the second storage equipment need to be more than or equal to the capacity of the first logical volume.
Fig. 3 is referred to, for example user needs to migrate the data in the first logical volume in the storage equipment 1 in AZ1, that , the interactive interface that user can be provided by Service Portal sends the request message, and the request message is requested Data Migration can be the 1st kind of migration pattern as described, the i.e. Data Migration between different storage device inside AZ. In addition, user can choose the type for needing the storage equipment moved to if user's selection is the 1st kind of Data Migration mode (such as being known as the first kind), such as the type that Service Portal can select user are added in request message together The type for being sent to cloud controller cluster or user's selection can also be sent to cloud controller cluster after request message.
After Service Portal receives the request message of user, which can be sent to cloud controller collection Group after cloud controller cluster receives the request message, then determines that second deposits according to the request message from multiple storage equipment Store up equipment.
It, in practical applications, can in an AZ although each type of storage equipment merely illustrates one in Fig. 3 Can the storage equipment of same type have multiple, for example may include the storage equipment of multiple SSD types in an AZ, or Storage equipment, etc. including multiple SATA types.So, if if the received request message of cloud controller cluster only selects The type for the storage equipment that will be moved to is without selecting specific storage equipment, and the storage of the type is set in the AZ For including multiple, then cloud controller cluster can be set according to the capacity of the first logical volume and the selected purpose storage of user again Standby type stores equipment to dispatch purpose, that is, cloud controller cluster needs select one from the storage equipment of multiple the type It is a to store equipment as a purpose, that is, as the second storage equipment.
For example, the type of the second storage equipment need to be the selected type of user, the active volume of the second storage equipment is needed More than or equal to the capacity of the first logical volume.Cloud controller cluster can be scheduled according to a variety of different factors, such as true After determining the selected type of user, according to the performance of multiple storage equipment of the type or capacity load etc. because usually therefrom selecting Second storage equipment, for example can choose the storage equipment of better performances as the second storage equipment, or such as can choose The less storage equipment of load therein can be according to the multiple of the type as the second storage equipment or cloud controller cluster Physical location where storage equipment come therefrom select the second storage equipment or cloud controller cluster can also with integrator these Because usually therefrom the second storage equipment of selection or cloud controller cluster can also select the second storage to set according to other factors It is standby, etc..Assuming that the second storage equipment of cloud controller colony dispatching is the storage equipment 2 in Fig. 3.
After determining the second storage equipment, cloud controller cluster can send Data Migration instruction to the second storage equipment, Data Migration instruction is used to indicate the Data Migration in the first logical volume to the second storage equipment.Obvious, the second storage Equipment needs to create logical volume to receive the data in the first logical volume, can carry the first logical volume in Data Migration instruction Capacity information, then, the capacity of the logical volume (such as be known as second logical volume) of the second storage equipment creation need to be more than or equal to the The data of first logical volume all can be migrated, avoided the occurrence of because of the second logical volume by the capacity of one logical volume in this way Capacity not enough and the case where can not migrate.
Optionally, if not being used for transmission the path of data before between the first storage equipment and the second storage equipment, The path that data are used for transmission before between the first storage equipment of creation and the second storage equipment is then needed, it will be in the first logical volume Data Migration to the first logical volume.In order to create for transmitting data between the first storage equipment and the second storage equipment Path, cloud controller cluster can also be sent out other than sending Data Migration instruction to the second storage equipment to the controller of SAN Lose one's life order, the controller which is used to indicate SAN created in SAN for the first storage equipment and the second storage equipment it Between transmit data path.Optionally, the information of the port of scheduling can be carried and be issued in the order by cloud controller cluster The controller of SAN.
Wherein, each storage equipment may also have multiple ports for Outside Access, if that the first storage equipment And/or second storage equipment have multiple ports for Outside Access, cloud controller cluster needs to dispatch and therefrom selects properly Port, and the information for the port selected is sent to the controller of SAN, to deposit for creating in the first storage equipment and second The path for transmitting data between equipment is stored up, such as can be scheduled by simple poll, or can also be negative according to port Carry dynamic equalization scheduling or be scheduled by other algorithms, the embodiment of the present invention to this with no restriction.
Optionally, if SAN itself is configured to full interconnection architecture, in SAN, it is believed that every two port is all two-by-two It can access mutually, be treated as having and being used for transmission before between the first storage equipment and the second storage equipment in this case The path of data, then may not need and Make Path again.
Optionally, foregoing creation between the first storage equipment and the second storage equipment for transmitting the road of data Diameter, which is the step that may be needed when SAN is using optical-fibre channel (Fibre Channel, FC) exchange network, if deposited Storage equipment use internet small computer interface (Internet Small Computer System Interface, ISCSI) agreement and SAN use Ethernet (Ethernet), then be also considered as the first storage equipment with second storage equipment it Between before have the path for being used for transmission data, may not need and Make Path again.
Cloud controller cluster can also be set other than sending Data Migration instruction to the second storage equipment with the first storage Standby global unique name (World Wide Name, wwn) (if it is FC agreement) or iSCSI authorize title (iSCSI Qualified Name, iQN) (if it is iSCSI protocol) be used as parameter, to first storage equipment (namely to first store The controller of equipment) it says the word, which is used to indicate the first storage equipment and the first logical volume is mapped to the second storage equipment. After the first logical volume is mapped to the second storage equipment, the first logical volume is just visible for the second storage equipment. The map operation of this step is actually the role that the second storage equipment has been regarded to host, and such second storage equipment can picture Host equally reads and writes the first logical volume.Difference is that host uses path between host and the first logical volume as read/write path, And the second storage equipment is to use the path between the first storage equipment and the second storage equipment as read/write path.
Optionally, after the Data Migration instruction that the second storage equipment receives that server is sent, the second storage equipment can be with According to Data Migration instruction, (proxy) logical volume is acted on behalf of in creation in the second storage equipment, after creation Agent logic volume, second The ID of ID and the first logical volume that storage equipment can enable Agent logic roll up are consistent, and the ID of logical volume is consistent to close very much Key, it can allow Agent logic volume to seem in agreement with the first logical volume to be the same logical volume, the MultiPath in host The two can be identified as the same logical volume.
Optionally, the task of Agent logic volume is intended merely to the access instruction that adapter tube is sent to the first logical volume originally, and It is not used in real storing data, therefore, the volume that the Agent logic volume of creation can only in logic, the second storage equipment can not It is rolled up for Agent logic and divides physical space, be both able to achieve the purpose of business continuity in this way, also save the physics of the second storage equipment Space.
Wherein, the ID of logical volume is related with the agreement that uses of storage equipment, for example, if the second storage equipment use it is small-sized Computer system interface (Small Computer System Interface, SCSI) agreement, then the ID of the second storage equipment can To include the wwn, etc. of the second storage equipment.
Optionally, it if not being used for transmission the path of data before between host and the second storage equipment, needs to create Be used for transmission the paths of data between host and the second storage equipment so that the second storage equipment can receiving host issue Access request.The paths of data is used for transmission between host and the second storage equipment in order to create, cloud controller cluster can be to The controller of SAN sends order, and the controller which is used to indicate SAN is created in SAN for storing in host and second The path of data is transmitted between equipment.Optionally, cloud controller cluster can carry the information of the port of scheduling in the order In issue the controller of SAN.
Likewise, storage equipment or host might have multiple ports all for Outside Access, if that host and/or Second storage equipment has multiple ports for Outside Access, and cloud controller cluster needs to dispatch and therefrom selects suitable end Mouthful, and the information for the port selected is sent to the controller of SAN, to be passed between host and the second storage equipment for creating The path of transmission of data, such as can be scheduled by simple poll, or can also be according to port dynamic load balancing tune Degree or be scheduled by other algorithms, the embodiment of the present invention to this with no restriction.
Optionally, if SAN itself is configured to full interconnection architecture, in SAN, it is believed that every two port is all two-by-two It can access mutually, be treated as having the road for being used for transmission data before between host and the second storage equipment in this case Diameter then may not need and Make Path again.
Optionally, foregoing creation between host and the second storage equipment for transmitting the path of data, the step It suddenly is the step that may be needed when SAN is using FC exchange network, if storage equipment uses iSCSI protocol and SAN makes It is Ethernet, then has the path for being used for transmission data before being also considered as between host and the second storage equipment, it can be with It no longer needs to Make Path.
Optionally, after the second storage equipment creation Agent logic volume, the second storage equipment, which can roll up Agent logic, reflects It penetrates to host, the path between host and the second storage equipment can be used in mapping as mapping link.In this way, agency patrols It collects volume to be just visible for host, and with the first logical volume, identical ID, host can be recognized because Agent logic volume has It is same logical volume for Agent logic volume and the first logical volume, and the MultiPath in host will be considered that host and the second storage Path between equipment is the backup path in the path between host and the first storage equipment.
Think that the path between host and the second storage equipment is between host and the first storage equipment in MultiPath After the backup path in path, MultiPath can enable host and second storage equipment between path, and disable host with Path between first storage equipment, in this way, the access request for the first logical volume that host issues just can all be deposited by second Equipment is stored up to receive.
Optionally, the path between host and the second storage equipment is enabled, and is disabled between host and the first storage equipment Path, can be realized by different modes, separately below introduce:
First way:
Second storage equipment by Agent logic volume mapping to host after, can notify cloud controller cluster, cloud controller collection Group can send the first control instruction to host, such as cloud controller cluster can be to the MultiPath hair in first server First control instruction, the first control instruction are used to indicate the path between the second storage equipment of first server enabling and host, And the path between the first storage equipment of disabling and host.In this way, MultiPath executes the first control instruction, it will be able to enable Path between path between second storage equipment and host, and the first storage equipment of disabling and host.
Optionally, cloud controller cluster can notify the second storage equipment after sending the first control instruction to host, this Sample second, which stores equipment, can start to carry out Data Migration.
The second way:
Second storage equipment by Agent logic volume mapping to host after, can notify cloud controller cluster, cloud controller collection Group sends the first control instruction to host, such as cloud controller cluster can send out the first control to the MultiPath in host and refer to It enabling, the first control instruction is used to indicate the path between the second storage equipment of MultiPath enabling and host, and, cloud controller Cluster can send the second control instruction to the first storage equipment, and the second control instruction be used to indicate the first storage equipment and release the Mapping between one logical volume and host.Wherein, the first control instruction of cloud controller collection pocket transmission and the second control instruction is suitable Sequence can be any.
Optionally, cloud controller cluster sending the first control instruction to host and sends the second control to the first storage equipment After system instruction, it can notify the second storage equipment, such second storage equipment that can start to carry out Data Migration.
Such as currently it is that VM1 in host is carrying out Data Migration, then no matter by which kind of above mode realizing enabling The path between path and disabling host and the first storage equipment between host and the second storage equipment, after realization, VM1 All access requests sent will be sent to the second storage equipment via the path between host and the second storage equipment, it is possible to understand that For due to the presence for having Agent logic to roll up, the second storage equipment has taken over host in the case where VM1 does not stop carry out business All access requests of the first logical volume are sent to, through the embodiment of the present invention provided technical solution, are moved carrying out data When shifting, it is not necessarily to interrupting service, ensure that being normally carried out for business.
Second storage equipment can carry out Data Migration, by the Data Migration in the first logical volume into the second logical volume. In data migration process, since the business of original first logical volume carrying is not interrupted, host can may also be stored to first Equipment sends the access request for accessing the first logical volume, since the path between host and the first storage equipment is banned With, and Agent logic volume is identical as the ID of the first logical volume, therefore, the second storage equipment meeting receiving host is sent to the first storage The access request of equipment.Because the second storage equipment is carrying out Data Migration, in the address to be visited that access request carries Data may be copied in the second logical volume, or may not also be also copied into the second logical volume, therefore, the Two storage equipment can be judged first after receiving access request, determine data in address to be visited whether by Copy the second logical volume to, if being copied into the second logical volume, the second storage equipment directly accesses the second logical volume, If being not yet copied into the second logical volume, the second storage equipment continues to access the first logical volume.
Optionally, the first logical volume, Agent logic volume and the second logical volume, these three logical volumes can consider common Logical address, for example for a logical address, the position in these three logical volumes is identical.Such as second storage It can store the corresponding relationship between the address of the first logical volume and the address of the second logical volume, the ground of the first logical volume in equipment It can be corresponded between location and the address of the second logical volume, for any one the first logical volume for being carried in access request Address can inquire the address of corresponding second logical volume in the corresponding relationship of the second storage equipment storage.For example, visiting Ask that the address to be visited carried in request is the first address of the first logical volume, then the second storage equipment can be right by inquiring this It should be related to, the second address that the first address corresponds in the second logical volume be determined, wherein the second address is relative to the second logical volume Position it is identical relative to the position of the first logical volume as the first address.
For example, if access request is read request, if address to be visited (for example, the first ground of the first logical volume Location) data be copied to the second logical volume, then second storage equipment from the second address of the second logical volume, (second is patrolled Address corresponding with the first address in volume volume) in read data, and by the data feedback of reading to host, if the first address Data are not copied into the second logical volume also, then the second storage equipment reads the data of address to be visited from the first address, and By the data feedback of reading to host.
For example, if access request is write request, if the data of address to be visited (for example, the first address) are It is copied to the second logical volume, then the second ground of the second logical volume is written in the data carried in write request by the second storage equipment Location (address corresponding with the first address in the second logical volume) directly updates the data in the second logical volume, if the first ground The data of location are not copied into the second logical volume also, then the data carried in write request can be written first by the second storage equipment Address updates the data in the first logical volume, in this way, subsequent can be by updated Data Migration to the second logical volume.
Optionally, if access request is write request, and the in the first address in the first logical volume and the second logical volume The not stored data of double-address show that the write request does not request to update original data, and new data is written in request, then Second storage equipment can access the second logical volume according to access request, i.e., the data write-in second directly carried the write request Address reduces the data volume that need to be copied in this way, subsequent just no longer need to copy the data.
Optionally, after all copying the data in the first logical volume to second logical volume, the second storage equipment can It also can control the second logical volume and agency to control the storage of ID or second equipment of the second logical volume succession Agent logic volume Logical volume exchanges ID, the ID for allowing the second logical volume that Agent logic is used to roll up in a word uses the ID of the first logical volume, then it Afterwards, all access requests from host can be transmitted directly to the second logical volume, and be not necessarily to interrupting service.In this way, the second logic Volume has just completely taken over the data and business of the first logical volume, and data migration process is completed.
After the completion of data migration process, the second storage equipment can notify cloud controller cluster, then cloud controller cluster It can carry out later period cleaning work.
Optionally, for the memory space saved in the second storage equipment, after the completion of data migration process, cloud controller Cluster can say the word to the second storage equipment, which is used to indicate the second storage equipment and deletes Agent logic volume.
Optionally, in order to avoid the system perturbations being likely to occur, after the completion of data migration process, cloud controller cluster can To say the word to the first storage equipment, which is used to indicate all mappings that the first storage equipment releases the first logical volume, example Such as may include the first logical volume and second storage equipment between mapping and the first logical volume and host between mapping, etc. Deng.
Optionally, because the ID of the first logical volume is occupied by the second logical volume, if the first logical volume can if existing It can cause confusion, therefore, after all mappings for releasing the first logical volume, the first storage equipment can delete the first logic Volume.Moreover, deleting the first logical volume, the memory space of the first storage equipment can also be saved.
Optionally, if creating the road for carrying out data transmission between the first storage equipment and the second storage equipment before Diameter, then after the completion of data migration process, cloud controller cluster can say the word to the controller of SAN, which is used to indicate The controller of SAN deletes the path carried out data transmission between the first storage equipment and the second storage equipment.Certainly, if before not The step of creating the path is carried out, then the process can be omitted.Alternatively, if between the first storage equipment and the second storage equipment There are also other purposes in path, or be currently being used, then can not also delete.
Optionally, the path carried out data transmission between equipment is stored for host and first before, and if by cloud Controller cluster indicates the controller creation of SAN, then cloud controller cluster can be given after the completion of data migration process The controller of SAN says the word, and the controller which is used to indicate SAN is deleted and carries out data between host and the first storage equipment The path of transmission.Certainly, if not carrying out the step of creating the path before, which be can be omitted.Alternatively, if host with There are also other purposes in path between first storage equipment, or are currently being used, then can not also delete.
Optionally, after the completion of data migration process, cloud controller cluster can notify Service Portal, and data are moved It moves work to be completed, such as Service Portal can be with output response message, to inform user, Data Migration work is complete At.
Fig. 4 is referred to, based on the same inventive concept, the embodiment of the present invention provides another number being applied in storage system According to moving method, the storage system may include the first storage equipment and second storage equipment, such as first storage equipment be to Storage equipment where the data of migration, the second storage equipment are that the purpose of Data Migration stores equipment.This method can be by Two storage equipment execute.Such as first storage equipment can be the storage equipment 1 in Fig. 1, the second storage equipment is depositing in Fig. 1 Equipment 2 is stored up, or the such as first storage equipment can be the storage equipment 2 in Fig. 1, the second storage equipment is that the storage in Fig. 1 is set Standby 1.The process of this method is described as follows.
Step 401: the second storage equipment receives the Data Migration instruction that server is sent, and Data Migration instruction is used to indicate By first store equipment in the first logical volume in Data Migration to second storage equipment, Data Migration instruction in include to The capacity information of first logical volume of migration, the first logical volume is for storing the data that host issues；
Step 402: the second storage equipment instructs according to Data Migration and creates the second logical volume in the second storage equipment, In, the capacity of the second logical volume is not less than the capacity of the first logical volume；
Step 403: the second storage equipment is stored in the according to the data of the first logical volume that Data Migration instruction will acquire Two logical volumes；
Step 404: the data for the first logical volume that will acquire according to Data Migration instruction are stored in the mistake of the second logical volume Cheng Zhong, the second access request for issuing of storage equipment receiving host carry the first address in access request, the first address be to The address of first logical volume of access；Wherein, step 404- step 406 can occur in the implementation procedure of step 403；
Step 405: if access request is write request, the second storage equipment determines the second address according to the first address, second Address is the address of the second logical volume；
Step 406: the second storage equipment accesses the second logical volume according to the second address.
Wherein, method shown in Fig. 4 is corresponding method with method shown in Fig. 2, and partial content can be referred to mutually, example Such as, the second storage of selection equipment, the path for establishing transmission data, the creation Agent logic volume (ID and first for enabling Agent logic roll up The ID of logical volume is identical) and the operation such as mapping logic volume, method shown in Fig. 4 and the embodiment phase in method shown in Fig. 2 It is similar, it can refer to the description of the part Fig. 2, seldom repeat.Here Fig. 4 method place different from Fig. 2 method is mainly introduced.
Optionally, the second storage equipment can store corresponding between the address of the first logical volume and the address of the second logical volume Relationship has been introduced in Fig. 2 process, seldom repeats.
Second storage equipment can carry out Data Migration, by the Data Migration in the first logical volume into the second logical volume. In data migration process, since the business of original first logical volume carrying is not interrupted, host can may also be stored to first Equipment sends the access request for accessing the first logical volume, since the path between host and the first storage equipment is banned With, and Agent logic volume is identical as the ID of the first logical volume, therefore, the second storage equipment meeting receiving host is sent to the first storage The access request of equipment.
If access request is read request, the second storage equipment can be patrolled by inquiring the address of the first logical volume with second The corresponding relationship collected between the address of volume determines address corresponding with the first address, for example, the second address in the second logical volume, Then the second storage equipment may determine that whether the data in the first address have been copied to the second address, if the second storage Equipment determines that the data in the first address have been copied into the second address, then the second storage equipment is directly read from the second address Data simultaneously feed back to host, if the data in the first address are not yet copied into the second address, the second storage equipment is from the Data are read in one address and feed back to host.I.e. second storage equipment is read out from the logical volume for be stored with data, is kept away Exempt to malfunction.
If access request is write request, address and second logic of the second storage equipment by the first logical volume of inquiry Corresponding relationship between the address of volume determines address corresponding with the first address, for example, the second address in the second logical volume, the The second address is written in the data that two storage equipment can directly carry write request, if not yet storing data in the second address (this may be there are two types of situation, and a kind of situation is that the data in the first address not yet migrate, another situation is that the first address In also not stored data), then the second storage equipment can directly write new data into the second logical volume, if in the second address Stored data (i.e. data in the first address migrate), the second storage equipment can be directly according to write request The data of middle carrying update the data in the second address.In this way, directly operating to the second logical volume, host has both been responded Access request, and the data that need to be migrated can be effectively reduced, improve data migration efficiency.
Optionally, the mistake of the second logical volume is stored in the data for the first logical volume that will acquire according to Data Migration instruction Cheng Zhong, the second storage equipment will for example migrate the data in the first address, can be judged, see that the data in the first address exist Whether have update in second logical volume and (judges whether the data in the first address have a ratio of update in the second logical volume Simpler method can be the number for judging to store in the second address in the data stored in the first address and the second logical volume According to whether different, if it is different, then determining that the data in the first address have updated in the second logical volume), if patrolled second It collects and has been updated in volume, then just not having to the data in the first address of migration, the data in migration next address can be continued, Certainly similar deterministic process can also be carried out.In this way, since write request is operated directly against the second logical volume, it may There are some data that can be updated directly into the second logical volume, this partial data in the first logical volume just no longer needs to migrate, and reduces The data volume that need to be migrated improves data migration efficiency.
After data migration process whole, i.e., will be needed in the first logical volume migration data (in the second logical volume In updated data be not belonging to the data that need to be migrated) all move to the second logical volume after, second storage equipment can enable Second logical volume inherits the ID of Agent logic volume, or the second logical volume and Agent logic can be enabled to roll up and exchange ID.Later, it comes from All access requests of host can be transmitted directly to the second logical volume, and be not necessarily to interrupting service.In this way, the second logical volume is with regard to complete The data and business of the first logical volume are taken over, data migration process is completed.
After the completion of data migration process, the second storage equipment can notify cloud controller cluster, then cloud controller cluster It can carry out later period cleaning work.This partial content can refer to the introduction in Fig. 2 process.
Technical solution as previously provided realizes the Data Migration between the different storage equipment inside same AZ. Fig. 5 is referred to, it is simple that the Data Migration how realized according to same inventive concept between different AZ introduced.
In such a scenario, as shown in Figure 5, it is desirable that the SAN between multiple AZ is complete intercommunication, and what is provided in Fig. 5 is Simplest big network interworking mode can have other network deployment way to guarantee intercommunication during actual deployment.Due to not The main flow for influencing migration service, only describes the operation scheme under the network architecture in Fig. 5, if in practical application here Network deployment scheme is different from Fig. 5, only needs corresponding SAN configuration step in modification process.
According to Fig. 5, (such as cloud controller cluster has selected in AZ2 in Fig. 3 the data that migrate in the first logical volume Storage equipment 2 stores equipment as a purpose), most implementation process is consistent with the description in Fig. 2 or Fig. 4 process, is had The process of difference is as follows:
When user sends request message by Service Portal, the type of the request message is as described the 2 seed types, then user can store the type of equipment by the request message together indicative purpose AZ and purpose.Certainly, Type of the AZ without changing purpose storage equipment can also be only changed, if such as user's non-indicative purpose storage in request message The type of equipment, then system default does not change the type of storage equipment.
It is where the first logical volume after cloud controller cluster receives the request message of the 1st seed type in Fig. 2-Fig. 4 AZ internal schedule purpose store equipment, and if cloud controller cluster it is received be the 2nd seed type request message, cloud control Purpose is dispatched in the AZ that device cluster can be indicated in request message and stores equipment, such as the purpose of scheduling stores equipment (i.e. Second storage equipment) be Fig. 5 in storage equipment 2.
Second storage equipment is when carrying out Data Migration according to the 2nd kind of request message, other than two above step, other Step with shown in Fig. 2 or Fig. 4 process respond the 1st kind of request message process be it is similar, it is no longer repeated.Certainly, If the intercommunication mode of the SAN between AZ is not mode described in Fig. 5, corresponding step needs to change, these are all abilities Field technique personnel are known.
Technical solution as previously provided, the data realized between the different storage equipment inside same AZ respectively are moved It moves, and the Data Migration between the different AZ under same region.Fig. 5 is referred to, it is simple how to introduce according to same invention Design is to realize the Data Migration between different geographical.
In such a scenario, the storage network between multiple regions there are intercommunication is also required, due to the distance ratio of cross-region Farther out, the network of more ground inter-domain intercommunicate is typically based on WAN, therefore what is disposed should be dedicated wide area network link.
According to Fig. 6, data (such as the cloud in the first logical volume in the storage equipment 1 in the AZ1 of Beijing region is migrated Controller collection mass selection has selected the storage equipment 2 in the AZ1 of the Shanghai region in Fig. 6 and has stored equipment as a purpose), most reality Existing process is consistent with the description in Fig. 2 or Fig. 4 process, and differentiated process is as follows:
When user sends request message by Service Portal, the type of the request message is as described the 3 seed types, then user can store the class of equipment by the request message together indicative purpose region, purpose AZ and purpose Type.It is of course also possible to only change the type of region and AZ without changing mesh block storage equipment, if such as user in request message The type of non-indicative purpose storage equipment, then system default does not change the type of storage equipment.
It is where the first logical volume after cloud controller cluster receives the request message of the 1st seed type in Fig. 2-Fig. 4 AZ internal schedule purpose store equipment, and if cloud controller cluster it is received be the 3rd seed type request message, cloud control Device cluster can scheduling purpose stores equipment in indicated region and indicated AZ in request message, such as scheduling It is the storage equipment 2 in Fig. 6 that purpose, which stores equipment (the i.e. second storage equipment),.
Since Fig. 6 uses storage network of the WAN as intercommunication, there is no need to create storage equipment 1 to storage equipment 2 Between path, without creation host to store equipment 2 between path, can be accessed mutually by iSCSI protocol implementation.
Second storage equipment is when carrying out Data Migration according to the 3rd kind of request message, other than two above step, other Step with shown in Fig. 2 or Fig. 4 process respond the 1st kind of request message process be it is similar, it is no longer repeated.Certainly, If the intercommunication mode of the storage network between region is not mode described in Fig. 6, corresponding step needs to change, these are all It is known to a person skilled in the art.
It is further to note that transition process also can accordingly prolong since the bandwidth of WAN is limited and time delay is very big It is long.It does not encourage VM in a region that WAN is used for a long time simultaneously yet and goes to access block storage equipment in another region, therefore across The Data Migration of region is usually associated with the migration of VM, i.e. VM is migrated together with logical volume.It as shown in Figure 6, can be by VM1 It moves in the region of Shanghai, such as VM1 is moved in the host 3 of Shanghai region, the VM1 after migration is known as VM6.Due to VM's Migration is another technology, not within the scope of discussion of the invention, therefore not reinflated description.In practical applications, if desired The Data Migration between region is carried out, then the migrating technology of the data in the migrating technology and logical volume of VM need to only be combined To be supplied to user.
Certainly, it is migrated simultaneously between multiple AZ that VM and logical volume can also be used in the same region, herein It repeats no more.
The embodiment of the invention provides the data transference packages under a kind of cloud computing system, and in this scenario, system can be with It is automatic to establish the required target resource of migration, migration path, and it is automatically performed the access path switching after migration, it is mentioned to reach For the ability of full-automatic Data Migration service.
Meanwhile Agent logic volume is introduced in this scenario, pass through the ID mono- of the ID and the first logical volume that enable Agent logic roll up It causes, so that Agent logic cigarette pipe host is sent to the access request of the first logical volume, and acts on behalf of logical volume after adapter tube Can be by the data copy in the first logical volume into the second logical volume, it can be with for received access request in copy procedure It realizes automatic distributing, realizes the migration of data without interrupting the service.
The embodiment of the present invention realizes complete Data Migration service in cloud platform, so that the user using cloud platform only needs The migration of data can be completed by carrying out simple one or several operations by Service Portal, be not necessarily to user oneself hand Dynamic to be migrated, operation needed for reducing user greatly reduces the enforcement difficulty of Data Migration for a user.
The a variety of migration scenes of Data Migration service support provided in an embodiment of the present invention, such as different masses in same AZ are deposited The migration, etc. between migration or different geographical under migration, same region between storage equipment between difference AZ, it is sufficiently full Foot a variety of migration demands of user.
Data migration process provided by the embodiment of the present invention, it is transparent to application when being migrated, completely without in Disconnected business, ensure that the continuity of business.Especially many business cannot be interrupted to successional more demanding, or be allowed The limited time of interruption expands the suitable of service deployment in cloud service then using technical solution provided in an embodiment of the present invention It with range, also avoids coordinating trouble brought by business interruption time, improves the flexibility ratio that user implements Data Migration.
Logic-based of the embodiment of the present invention rolls up the data direct copying to logical volume, without passing through pair in cloud computing system As storage system progress data relay, transition process is accelerated, transit time is saved, also saves network bandwidth, Jin Erjie The use cost of cloud resource is saved.
Technical solution provided by the embodiment of the present invention also can be applied to private clound in addition to can be applied to public cloud.
The capacity that Data Migration service provided by the embodiment of the present invention can be also used between each piece of storage equipment is equal Weighing apparatus or balancing performance.For example, the performance of multiple storage equipment under the cloud controller cluster monitoring cloud computing system can be passed through Or capacity etc. (such as can increase a balance dispatching module to realize the function, which can be in cloud controller cluster By hardware realization, software realization can also be passed through), once the threshold that discovery has the performance pressures of storage equipment to exceed some setting Value or capacity occupancy beyond some setting threshold value, then trigger data migrate, by the storage equipment part logical volume or Data Migration in whole logical volumes is into other storage equipment, to realize that capacity equilibrium between storage equipment or performance are equal Weighing apparatus.
In such as preceding description, be by taking the transition process of the data in a logical volume as an example, in practical applications, can There can be the data in multiple logical volumes to need while migrate, then the data in each logical volume are ok in transition process Migrated using technical solution provided by the embodiment of the present invention, the data in multiple logical volumes can with parallel migration, or Person can also serially migrate, the embodiment of the present invention to this with no restriction.
The device in the embodiment of the present invention is introduced below in conjunction with attached drawing.
Refer to Fig. 7, the embodiment of the present invention provides the first storage equipment, the storage equipment may include receiver 701, Processor 702 and memory 703.
Processor 702 for example can be central processing unit (CPU) or application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), it can be one or more integrated circuits executed for controlling program, It can be the hardware circuit of use site programmable gate array (Field Programmable Gate Array, FPGA) exploitation, It can be baseband chip.
The quantity of memory 703 can be one or more.Memory 703 may include the memory space for storing equipment, Such as may include flash memory (FLASH) or dynamic random access memory (Dynamic Random Access Memory, DRAM) etc..
Receiver 701 can be used for being communicated with other equipment, can specifically pass through the networks such as SAN, Ethernet, WAN It is communicated with external equipment.
Memory 703 and receiver 701 can be connected (Fig. 7 is as example) by bus with processor 702, Huo Zheye It can be connect respectively by special connecting line with processor 702.
By being designed programming to processor 702, will be aforementioned shown in code corresponding to method be cured in chip, To make chip be able to carry out method shown in Fig. 2 process at runtime.How processor 702 is designed and is programmed for ability Technology well known to field technique personnel, which is not described herein again.
Storage equipment in the embodiment of the present invention in Fig. 7 can execute method described in Fig. 2 process, such as can be second Store equipment.The datail description etc. in work and implementation procedure that each module in the storage equipment is completed, can refer to The description of method part, seldom repeats.
Refer to Fig. 8, the embodiment of the present invention provides second of storage equipment, the storage equipment may include receiver 801, Processor 802 and memory 803.
Processor 802 for example can be CPU or ASIC, can be one or more for controlling the integrated electricity of program execution Road can be the hardware circuit developed using FPGA, can be baseband chip.
The quantity of memory 803 can be one or more.Memory 803 may include the memory space for storing equipment, It such as may include FLASH or DRAM etc..
Receiver 801 can be used for being communicated with other equipment, can specifically pass through the networks such as SAN, Ethernet, WAN It is communicated with external equipment.
Memory 803 and receiver 801 can be connected by bus with processor 802, or can also be passed through respectively Special connecting line is connect with processor 802.
By being designed programming to processor 802, will be aforementioned shown in code corresponding to method be cured in chip, To make chip be able to carry out method shown in Fig. 4 process at runtime.How processor 802 is designed and is programmed for ability Technology well known to field technique personnel, which is not described herein again.
Storage equipment in the embodiment of the present invention in Fig. 8 can execute method described in Fig. 4 process, such as can be second Store equipment.The datail description etc. in work and implementation procedure that each module in equipment is completed, can refer to method portion The description divided, seldom repeats.
In addition, the storage equipment in Fig. 8 can be same equipment with the storage equipment in Fig. 7, or it is also possible to difference Equipment.That is, method shown in Fig. 2 and method shown in Fig. 4 can be realized by same storage equipment, or can also pass through Different storage equipment is realized.
Optionally, the embodiment of the present invention also provides a kind of storage system, may include the first storage as described in Fig. 2-Fig. 4 Equipment, and may include that Fig. 7 or shown in Fig. 8 second stores equipment.
Fig. 9 is referred to, based on the same inventive concept, the embodiment of the present invention provides the third storage equipment, the storage equipment It may include receiving module 901 and processing module 902.
In practical applications, the corresponding entity device of processing module 902 can be the processor 702 in Fig. 7, receiving module 901 corresponding entity devices can be the receiver 701 in Fig. 7.
The storage equipment can be used for executing method described in above-mentioned Fig. 2, such as can be the second storage equipment.Therefore, For the function etc. that each unit in the storage equipment is realized, it can refer to the description such as front method part, seldom repeat.
Referring to Figure 10, based on the same inventive concept, the embodiment of the present invention provides the 4th kind of storage equipment, the storage equipment It may include receiving module 1001 and processing module 1002.
In practical applications, the corresponding entity device of processing module 1002 can be the processor 802 in Fig. 8, receive mould The corresponding entity device of block 1001 can be the receiver 801 in Fig. 8.
The storage equipment can be used for executing method described in above-mentioned Fig. 4, such as can be the second storage equipment.Therefore, For the function etc. that each unit in the storage equipment is realized, it can refer to the description such as front method part, seldom repeat.
In addition, the storage equipment in Figure 10 can be same equipment with the storage equipment in Fig. 9, or it is also possible to difference Equipment.That is, method shown in Fig. 2 and method shown in Fig. 4 can be realized by same storage equipment, or can also pass through Different storage equipment is realized.
Optionally, the embodiment of the present invention also provides a kind of storage system, may include the first storage as described in Fig. 2-Fig. 4 Equipment, and may include that Fig. 9 or shown in Fig. 10 second stores equipment.
Technical solution provided by the embodiment of the present invention is realized without interrupting original business in data migration process The continuity of business.
The above, above embodiments are only to be described in detail technical solution of the present invention, but the above implementation The method that the explanation of example is merely used to help understand the embodiment of the present invention, should not be construed as the limitation to the embodiment of the present invention.

Claims (14)

1. a kind of data migration method applied in storage system, which is characterized in that the storage system includes the first storage Equipment and the second storage equipment, which comprises
The second storage equipment receives the Data Migration instruction that server is sent, and the Data Migration instruction is used to indicate institute Data Migration in the first logical volume in the first storage equipment is stated to the second storage equipment, in the Data Migration instruction It include the capacity information of the first logical volume to be migrated, first logical volume is for storing the data that host issues；
The second storage equipment instructs according to the Data Migration and creates the second logical volume in the second storage equipment, In, the capacity of second logical volume is not less than the capacity of first logical volume；
The data for first logical volume that the second storage equipment will acquire according to Data Migration instruction are stored in institute State the second logical volume；
The data for first logical volume that will acquire according to Data Migration instruction are stored in the mistake of second logical volume Cheng Zhong, the second storage equipment receive the access request that the host issues, carry to be visitedly in the access request Location, the address to be visited are the address of first logical volume；
The second storage equipment judges whether the data of the address to be visited have been copied into second logical volume；
When the data of the address to be visited have been copied into second logical volume, the second storage equipment is according to institute It states access request and accesses second logical volume；
When the data of the address to be visited are not yet copied into second logical volume, the second storage equipment is according to institute It states access request and accesses first logical volume.
2. the method as described in claim 1, which is characterized in that
After the Data Migration instruction that the second storage equipment receives that server is sent, further includes:
The second storage equipment instructs the creation Agent logic volume in the second storage equipment according to the Data Migration；Its In, the identity ID of the Agent logic volume is identical as the ID of first logical volume；
The second storage equipment receives the access request that the host issues, comprising:
Based on the ID of Agent logic volume, the second storage equipment receives the access request that the host issues；Wherein, exist After creating the Agent logic volume, the path between the second storage equipment and the host is activated, and described first deposits The path stored up between equipment and the host is disabled.
3. method according to claim 1 or 2, which is characterized in that further include:
If the access request is write request, when described to be visited in first logical volume and second logical volume Address not stored data when, the second storage equipment accesses second logical volume according to the access request.
4. method according to claim 2, which is characterized in that further include:
It is stored in the data for first logical volume that the second storage equipment will acquire according to Data Migration instruction After second logical volume, the second storage equipment controls the ID that second logical volume inherits the Agent logic volume.
5. a kind of data migration method applied in storage system, which is characterized in that the storage system includes the first storage Equipment and the second storage equipment, which comprises
The second storage equipment receives the Data Migration instruction that server is sent, and the Data Migration instruction is used to indicate institute Data Migration in the first logical volume in the first storage equipment is stated to the second storage equipment, in the Data Migration instruction It include the capacity information of the first logical volume to be migrated, first logical volume is for storing the data that host issues；
The second storage equipment instructs according to the Data Migration and creates the second logical volume in the second storage equipment, In, the capacity of second logical volume is not less than the capacity of first logical volume；
The data for first logical volume that the second storage equipment will acquire according to Data Migration instruction are stored in institute State the second logical volume；
The data for first logical volume that will acquire according to Data Migration instruction are stored in the mistake of second logical volume Cheng Zhong, the second storage equipment receive the access request that the host issues, carry the first address in the access request, First address is the address of first logical volume to be visited；
If the access request is write request, the second storage equipment determines the second address according to first address, described Second address is the address of second logical volume；
The second storage equipment accesses second logical volume according to second address.
6. method as claimed in claim 5, which is characterized in that
After the Data Migration instruction that the second storage equipment receives that server is sent, further includes:
The second storage equipment instructs the creation Agent logic volume in the second storage equipment according to the Data Migration；Its In, the identity ID of the Agent logic volume is identical as the ID of first logical volume；
The second storage equipment receives the access request that the host issues, comprising:
Based on the ID of Agent logic volume, the second storage equipment receives the access request, wherein is creating the generation After managing logical volume, the path between the second storage equipment and the host is activated, and the first storage equipment and institute The path stated between host is disabled.
7. method as claimed in claim 6, which is characterized in that the method also includes:
Second logical volume is stored in the data for first logical volume that will acquire according to Data Migration instruction In the process, the second storage equipment judges the data stored in the first address in first logical volume to be migrated in institute It states in the second logical volume and whether has updated；
If the data stored in first address have updated in second logical volume, the second storage equipment is not moved Move the data stored in first address.
8. a kind of storage equipment characterized by comprising
Receiving module, for receiving the Data Migration instruction of server transmission, the Data Migration instruction is used to indicate first Store the Data Migration in the first logical volume in equipment and arrive the storage equipment, the Data Migration instruct in include wait move The capacity information of the first logical volume moved, first logical volume is for storing the data that host issues；
Processing module, for creating the second logical volume in the storage device according to Data Migration instruction, wherein described The capacity of second logical volume is not less than the capacity of first logical volume；
The processing module is also used to instruct the data for first logical volume that will acquire to be stored according to the Data Migration Second logical volume；
The processing module is stored in described the according to the data of first logical volume that Data Migration instruction will acquire During two logical volumes, the receiving module is also used to receive the access request that the host issues, in the access request Address to be visited is carried, the address to be visited is the address of first logical volume；
The processing module, is also used to:
Judge whether the data of the address to be visited have been copied into second logical volume；
When the data of the address to be visited have been copied into second logical volume, institute is accessed according to the access request State the second logical volume；
When the data of the address to be visited are not yet copied into second logical volume, institute is accessed according to the access request State the first logical volume.
9. storage equipment as claimed in claim 8, which is characterized in that
The processing module is also used to: after the Data Migration instruction that the receiving module receives that server is sent, according to institute State Data Migration instruction creation Agent logic volume in the storage device；Wherein, the identity number of the Agent logic volume ID is identical as the ID of first logical volume；
The receiving module is used for: the ID based on Agent logic volume receives the access request that the host issues；Wherein, After creating the Agent logic volume, the path between the storage equipment and the host is activated, and first storage Path between equipment and the host is disabled.
10. storage equipment as claimed in claim 8 or 9, which is characterized in that the processing module is also used to:
If the access request is write request, when described to be visited in first logical volume and second logical volume Address not stored data when, second logical volume is accessed according to the access request.
11. storage equipment as claimed in claim 9, which is characterized in that the processing module is also used to:
The data of first logical volume that will acquire according to Data Migration instruction be stored in second logical volume it Afterwards, the ID that second logical volume inherits the Agent logic volume is controlled.
12. a kind of storage equipment characterized by comprising
Receiving module, for receiving the Data Migration instruction of server transmission, the Data Migration instruction is used to indicate first Store the Data Migration in the first logical volume in equipment and arrive the storage equipment, the Data Migration instruct in include wait move The capacity information of the first logical volume moved, first logical volume is for storing the data that host issues；
Processing module, for creating the second logical volume in the storage device according to Data Migration instruction, wherein described The capacity of second logical volume is not less than the capacity of first logical volume；
The processing module is also used to instruct the data for first logical volume that will acquire to be stored according to the Data Migration Second logical volume；
The processing module is stored in described the according to the data of first logical volume that Data Migration instruction will acquire During two logical volumes, the receiving module is also used to receive the access request that the host issues, in the access request The first address is carried, first address is the address of first logical volume to be visited；
The processing module is also used to:
If the access request is write request, the second address is determined according to first address, second address is described the The address of two logical volumes；
Second logical volume is accessed according to second address.
13. storing equipment as claimed in claim 12, which is characterized in that
The processing module is also used to: after the Data Migration instruction that the receiving module receives that server is sent, according to institute State Data Migration instruction creation Agent logic volume in the storage device；Wherein, the identity number of the Agent logic volume ID is identical as the ID of first logical volume；
The receiving module is used for: the ID based on Agent logic volume receives the access request, wherein described in creation Agent logic volume after, it is described storage equipment and the host between path be activated, and it is described first storage equipment with it is described Path between host is disabled.
14. storage equipment as claimed in claim 13, which is characterized in that the processing module is also used to:
Second logical volume is stored in the data for first logical volume that will acquire according to Data Migration instruction In the process, judge the data stored in the first address in first logical volume to be migrated is in second logical volume It is no to have updated；
If the data stored in first address have updated in second logical volume, do not migrate in first address The data of storage.
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