CN109976952A - The method and apparatus of cross-domain backup in cloud computing system - Google Patents
The method and apparatus of cross-domain backup in cloud computing system Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 27
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
- G06F11/1451—Management of the data involved in backup or backup restore by selection of backup contents
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1464—Management of the backup or restore process for networked environments
Abstract
The invention discloses a kind of method and apparatus of cross-domain backup in cloud computing system.The described method includes: obtaining the data generated after the first data center response service request；After detecting that the memory space is stored, the storage location information and storage time information that are recorded in the memory space of first data center；After receiving the first data synchronization request, the second data center with matching relationship that control is located at first data center in same city reads the data according to the storage time and the storage location information from the memory space.
Description
Technical field
The present invention relates to field of information processing, the method and apparatus of cross-domain backup in espespecially a kind of cloud computing system.
Background technique
Three center of two places, two places refer to same city, strange land, and three centers refer to the production center, standby with city dual-active center, strange land calamity
Center.Refer to the double centers in city and establish two data centers that can independently undertake critical system operation in same city or neighbouring city,
Double centers have substantially equivalent traffic handing capacity and pass through high-speed link real-time synchronization data, can the same time-division under even in everyday situations
The operation of load business and management system, and changeable operation；It can be carried out in the case where not losing data substantially under disaster scenario
The standby emergency switching of calamity, keeps business continuity operation.With strange land calamity for mode compared with, with the double centers in city have cost of investment it is low,
The advantages that construction speed is fast, operation management is relatively easy, reliability is higher.Strange land Disaster Preparation Center refers to the city foundation in strange land
The Disaster Preparation Center of one backup is used for bicentric data backup, breaks down when the reasons such as natural calamity occur in double centers
When, strange land Disaster Preparation Center can carry out the recovery of business with Backup Data.
In cloud computing system, business continuance is always the strong demand of client, under traditional scheme, solves business continuance
Typical scenario be three center of two places, i.e., dual-active data center, identical industry is arranged in the position of relative close on geographical location
Business is separately operable on two dual-active centers, in the strange land of geographical location relatively far away from, disaster-tolerant backup data center is disposed, in dual-active number
When being destroyed caused by force majeure according to center because occurring due to can not provide business, disaster-tolerant backup data center can tolerate when
In by business recovery.In business under the trend of cloud, how using the characteristics such as elastic, convenient of cloud come more automatic, efficiently
Business is highly reliable on ground guarantee cloud, becomes urgent problem to be solved.During cloud on many professions, typical cloud
Three center scene of data center two places also largely exists, for example, the industries such as bank, landsat and public security.
By realizing the long-range multiple in real time of bottom storing data using the dual-active real-time synchronization software of storage in accumulation layer
System and asynchronous replication；Network layer realizes the tunnel VXLAN of MP-BGP agreement by EVN technology, realizes big double layered communication, two layers big
Communication support is can be got through between dual-active data center with two layers, to guarantee the seamless switching of business virtual machine.This side
Case provides complete three center disaster recovery technical implementation way of two places.This method can support heterogeneous storage system, basic energy
Realize the target of RPO=0, RTO close to 0.
Since the framework at three center of two places is huge, data volume is huge on different centers, how efficiently to execute data
It synchronizes and is a problem to be solved.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides the methods and dress of cross-domain backup in a kind of cloud computing system
It sets, can be improved the synchronous efficiency of data.
To achieve the above object of the invention, this application provides a kind of methods of cross-domain backup in cloud computing system, comprising:
After the data generated after detecting the first data center response service request are stored, it is recorded in first number
According to the storage location information and storage time information in the memory space at center；
After receiving the first data synchronization request, control, which is located at, to be matched with first data center in having for same city
Described in second data center of relationship is read from the memory space according to the storage time and the storage location information
Data.
In one exemplary embodiment, the storage location in the memory space for being recorded in first data center
Before information and storage time information, the method also includes:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
Storage location information and storage time information in the memory space for being recorded in first data center, packet
It includes:
Record the identification information and storage time of the volume that the data are stored.
In one exemplary embodiment, the method also includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time,
Obtain second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain target
Data；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
In one exemplary embodiment, the storage location information according to the target data obtains described second
The target data of data center, comprising:
According to the storage location information of the target data, target data is read from second data center, and record
The target identification information of the target data used volume when being stored in second data center；
According to the target identification information, stored in the volume with the target identification information of first data center
The target data.
In one exemplary embodiment, the method also includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding described set
Standby configuration information；
Send the metadata information of the equipment to long-distance disaster center.
To achieve the above object of the invention, this application provides a kind of devices of cross-domain backup in cloud computing system, including place
Reason device and memory, the memory are stored with computer program, and the processor calls the computer in place's memory
Program is to realize following operation, comprising:
After the data generated after detecting the first data center response service request are stored, it is recorded in first number
According to the storage location information and storage time information in the memory space at center；
After receiving the first data synchronization request, control, which is located at, to be matched with first data center in having for same city
Described in second data center of relationship is read from the memory space according to the storage time and the storage location information
Data.
In one exemplary embodiment, the processor is calling computer program realization to be recorded in first data
Before storage location information and storage time information in the memory space at center, the processor calls computer program also real
Now following operation, comprising:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
The processor depositing in the memory space for calling computer program realization to be recorded in first data center
In the operating process for storing up location information and storage time information, the processor calls computer program to realize following operation, packet
It includes:
Record the identification information and storage time of the volume that the data are stored.
In one exemplary embodiment, the processor calls the computer program in place's memory to realize such as
Lower operation, further includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time,
Obtain second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain target
Data；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
In one exemplary embodiment, the processor calls the computer program to realize according to the target data
Storage location information, in the operating process for obtaining the target data of second data center, described in the processor calls
Computer program realizes following operation, comprising:
According to the storage location information of the target data, target data is read from second data center, and record
The target identification information of the target data used volume when being stored in second data center；
According to the target identification information, stored in the volume with the target identification information of first data center
The target data.
In one exemplary embodiment, the processor calls the computer program in place's memory to realize such as
Lower operation, further includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding described set
Standby configuration information；
Send the metadata information of the equipment to long-distance disaster center.
Embodiment provided by the invention, the data generated after detecting the first data center response service request are stored
Afterwards, the storage location information and storage time information being recorded in the memory space of first data center are receiving
After one data synchronization request, control is located at the second data center with matching relationship with first data center in same city
The data are read from the memory space according to the storage time and the storage location information, are realized with dual-active in city
The rapid data at dynamic center is synchronous, improves data synchronization efficiency.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the flow chart of the method for cross-domain backup in cloud computing system provided by the invention；
Fig. 2 is the schematic diagram of three centring system of two places provided by the invention；
Fig. 3 is the schematic diagram that data are synchronous in system shown in Figure 2；
Fig. 4 is schematic diagram synchronous with data in city in system shown in Figure 2；
Fig. 5 is the schematic diagram that data synchronize in strange land in system shown in Figure 2；
Fig. 6 is the structure chart at three center of two places that application example of the present invention provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Fig. 1 is the flow chart of the method for cross-domain backup in cloud computing system provided by the invention.Method shown in Fig. 1 includes:
Step 101 after the data that generate are stored after detecting the first data center response service request, is recorded in institute
State the storage location information and storage time information in the memory space of the first data center；
In one exemplary embodiment, the content synchronous with city Dual Action centre data is newly-generated in synchronization time
Data, after the data that detection side is generated to the first data center are stored, by recording the storage information of the data, for position
It is synchronous that the second data center of Yu Tongcheng carries out data；
Step 102, after receiving the first data synchronization request, control be located at first data center in same city
The second data center with matching relationship is according to the storage time and the storage location information from the memory space
Read the data.
In one exemplary embodiment, the synchronization of the second data center is determined by receiving the first data synchronization request
Request, and control the second data center and data are carried out according to the storage information of the data recorded, reduce the second data center sieve
The processing cost of new data is selected, realizes that directly reading data completion data according to the storage information that the first data center provides synchronizes
Purpose.
Embodiment of the method provided by the invention, the data quilt generated after detecting the first data center response service request
After storage, the storage location information and storage time information being recorded in the memory space of first data center are being received
To after the first data synchronization request, control is located at the second data with matching relationship with first data center in same city
The data are read according to the storage time and the storage location information in center from the memory space, realize in city
The rapid data at Dual Action center is synchronous, improves data synchronization efficiency.
Method provided by the invention is illustrated below:
In one exemplary embodiment, the storage location in the memory space for being recorded in first data center
Before information and storage time information, the method also includes:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
Storage location information and storage time information in the memory space for being recorded in first data center, packet
It includes:
Record the identification information and storage time of the volume that the data are stored.
In the present example embodiment, the data that the first data center generates can store in storage array, wherein depositing
Storage array can be marked by way of storage volume, when recording the storage location of data, can be rolled up by record storage
Identification information mark, to achieve the purpose that simplified recorded cost；
In one exemplary embodiment, the data of the first data center can store in pre-set shared volume,
Wherein the shared volume is configured with the control information for allowing second data center to access.
By the way that the data for needing to be synchronized to the second data center are stored in the second data center, it can be convenient the second data
Center carries out reading data, realizes the purpose that the second data center actively reads, in addition, by the way that synchronous data will be needed to store
In shared volume, achievees the purpose that be isolated with local data, improved data safety.
In one exemplary embodiment, the method also includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time,
Obtain second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain target
Data；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
In the present example embodiment, logical first when the first data center is synchronous to the second data center requests data
The storage time of overwriting determines and needs synchronous data, and in the storage location for obtaining above-mentioned data, it is synchronous to complete data.
In one exemplary embodiment, the storage location information according to the target data obtains described second
The target data of data center, comprising:
According to the storage location information of the target data, target data is read from second data center, and record
The target identification information of the target data used volume when being stored in second data center；
According to the target identification information, stored in the volume with the target identification information of first data center
The target data.
In the present example embodiment, newly-generated data are synchronized to and data is in second data center's like-identified
In storage volume, on the one hand in same city business transition, the reading of data can be directly carried out, without repairing to storage location
Change, guarantees the continuity of business, in addition, when data are synchronous, since the storing data of Liang Ge data center is in memory space
Storage be consistent, can be quickly found out corresponding newly-generated data, reduce the time for determining new data, it is synchronous to improve data
Efficiency.
In one exemplary embodiment, the method also includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding described set
Standby configuration information；
Send the metadata information of the equipment to long-distance disaster center.
In the present example embodiment, by by the metadata of equipment in the first data center to long-distance disaster center, with
Just long-distance disaster center can according to the metadata of the first data center, the system architecture of the first data center of Fast Restoration, into
The migration and response of industry business.
Wherein, equipment can be virtual machine, storage pool and host etc..
Fig. 2 is the schematic diagram of three centring system of two places provided by the invention.As shown in Fig. 2, in the network level of disaster tolerance, base
In VXLAN (Virtual eXtensible LAN, expansible virtual LAN) and MP-BGP (multi-protocols of BGP extend) EVPN
(Ethernet VPN, Intranet VPN) realizes that, with city DCI, L3VPN is realized at strange land center.SDN realizes two layers big with city dual-active center
Intercommunication, data Layer use VXLAN, and control layer uses EVPN, and strange land is based on MPLS and realizes L3VPN, reach management three layers of safety of net
Stabilized communication.
Fig. 3 is the schematic diagram that data are synchronous in system shown in Figure 2.As shown in figure 3, in the storage level of disaster tolerance, two centers
It runs simultaneously, guarantees data consistency, high-performance；Remote copy: synchronous duplication does not influence the storage performance at dual-active center；It is different
Step duplication, the RPO of guarantee data is close to 0 as far as possible.
Fig. 4 is schematic diagram synchronous with data in city in system shown in Figure 2.As shown in figure 4, in same city dual-active data
The heart is realized by two data center deployments and tenant's net double layer intercommunication by the same VDC in same city with city dual-active data
Then the unified layout and scheduling of business virtual machine in center provide load balancing on the upper layer VDC of same city dual-active data center
To realize the switching of dual-active business.Shared volume mechanism and rbd mirror by distributed storage across data center are supported
Data strong consistency of the business virtual machine between Tong Cheng.
Fig. 5 is the schematic diagram that data synchronize in strange land in system shown in Figure 2.As shown in figure 5, in strange land disaster-tolerant backup data center
In, by building virtual machine id and storage lun corresponding relationship and cloud platform metadata simultaneous techniques, guarantee data base consistency(-tance)
And real-time；Automatically restoring fault technology Failover, analyzes the metadata that real-time synchronization comes, is recombinated, and is formed and is compiled
Template is arranged, it can be according to one bond reconstruction operation system of template.
Fig. 6 is the structure chart at three center of two places that application example of the present invention provides.It is as shown in Figure 6:
Management platform is responsible for management and which business virtual machine is selected to start in local data center, which business
Virtual machine starts in same city data center；
Strange land calamity overcomes currently stored three center of two places by executing metadata synchronization and fault recovery management for business
The storage of scheme bottom mostly uses greatly problem at high cost caused by centralised storage；
It is synchronous with city data, software defined network (Software Defined is realized by establishing virtual channel
Network, SDN) double layer network extension (DCI:Data Center Interconnection) on a large scale；
, will be standby as two kinds of individual scenes with city dual-active and strange land calamity in this application example, it proposes based on cross-domain
VDC and unified view realize the automation scheduling of resource and layout of dual-active data center, empty by building in strange land Disaster Preparation Center
Quasi- machine id and storage lun corresponding relationship and cloud platform metadata simultaneous techniques, guarantee data base consistency(-tance) and real-time；Simultaneously
The metadata that real-time synchronization comes is analyzed, is recombinated, layout template is formed, it can be according to one bond reconstruction business system of template
System.
Application example provided by the invention realizes intelligent disaster tolerance system, automation and and business based on three center of two places
The unified management of cloud platform can effectively improve the degree of automation and efficiency of disaster tolerance management, promote the continuity of business.
It is described to deposit this application provides a kind of device of cross-domain backup in cloud computing system, including processor and memory
Reservoir is stored with computer program, and the processor calls the computer program in place's memory to realize following operation,
Include:
After the data generated after detecting the first data center response service request are stored, it is recorded in first number
According to the storage location information and storage time information in the memory space at center；
After receiving the first data synchronization request, control, which is located at, to be matched with first data center in having for same city
Described in second data center of relationship is read from the memory space according to the storage time and the storage location information
Data.
In one exemplary embodiment, the processor is calling computer program realization to be recorded in first data
Before storage location information and storage time information in the memory space at center, the processor calls computer program also real
Now following operation, comprising:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
The processor depositing in the memory space for calling computer program realization to be recorded in first data center
In the operating process for storing up location information and storage time information, the processor calls computer program to realize following operation, packet
It includes:
Record the identification information and storage time of the volume that the data are stored.
In one exemplary embodiment, the processor calls the computer program in place's memory to realize such as
Lower operation, further includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time,
Obtain second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain target
Data；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
In one exemplary embodiment, the processor calls the computer program to realize according to the target data
Storage location information, in the operating process for obtaining the target data of second data center, described in the processor calls
Computer program realizes following operation, comprising:
According to the storage location information of the target data, target data is read from second data center, and record
The target identification information of the target data used volume when being stored in second data center；
According to the target identification information, stored in the volume with the target identification information of first data center
The target data.
In one exemplary embodiment, the processor calls the computer program in place's memory to realize such as
Lower operation, further includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding described set
Standby configuration information；
Send the metadata information of the equipment to long-distance disaster center.
Installation practice provided by the invention, the data quilt generated after detecting the first data center response service request
After storage, the storage location information and storage time information being recorded in the memory space of first data center are being received
To after the first data synchronization request, control is located at the second data with matching relationship with first data center in same city
The data are read according to the storage time and the storage location information in center from the memory space, realize in city
The rapid data at Dual Action center is synchronous, improves data synchronization efficiency.
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate.In hardware embodiment,
Division between the functional module/unit referred in the above description not necessarily corresponds to the division of physical assemblies；For example, one
Physical assemblies can have multiple functions or a function or step and can be executed by several physical assemblies cooperations.Certain groups
Part or all components may be implemented as by processor, such as the software that digital signal processor or microprocessor execute, or by
It is embodied as hardware, or is implemented as integrated circuit, such as specific integrated circuit.Such software can be distributed in computer-readable
On medium, computer-readable medium may include computer storage medium (or non-transitory medium) and communication media (or temporarily
Property medium).As known to a person of ordinary skill in the art, term computer storage medium is included in for storing information (such as
Computer readable instructions, data structure, program module or other data) any method or technique in the volatibility implemented and non-
Volatibility, removable and nonremovable medium.Computer storage medium include but is not limited to RAM, ROM, EEPROM, flash memory or its
His memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other
Magnetic memory apparatus or any other medium that can be used for storing desired information and can be accessed by a computer.This
Outside, known to a person of ordinary skill in the art to be, communication media generally comprises computer readable instructions, data structure, program mould
Other data in the modulated data signal of block or such as carrier wave or other transmission mechanisms etc, and may include any information
Delivery media.
Claims (10)
1. a kind of method of cross-domain backup in cloud computing system characterized by comprising
After the data generated after detecting the first data center response service request are stored, it is recorded in first data
Storage location information and storage time information in the memory space of the heart；
After receiving the first data synchronization request, control, which is located at, has matching relationship in same city with first data center
The second data center the data are read from the memory space according to the storage time and the storage location information.
2. according to the method described in claim 1, it is characterized by:
Before storage location information and storage time information in the memory space for being recorded in first data center, institute
State method further include:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
Storage location information and storage time information in the memory space for being recorded in first data center, comprising:
Record the identification information and storage time of the volume that the data are stored.
3. method according to claim 1 or 2, which is characterized in that the method also includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time, obtains
Second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain number of targets
According to；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
4. according to the method described in claim 3, it is characterized in that, the storage location information according to the target data,
Obtain the target data of second data center, comprising:
According to the storage location information of the target data, target data is read from second data center, and described in record
The target identification information of target data used volume when being stored in second data center；
According to the target identification information, in the volume with the target identification information of first data center described in storage
Target data.
5. method according to claim 1 or 2, which is characterized in that the method also includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding the equipment
Configuration information；
Send the metadata information of the equipment to long-distance disaster center.
6. the device of cross-domain backup in a kind of cloud computing system, which is characterized in that including processor and memory, the memory
It is stored with computer program, the processor calls the computer program in place's memory to realize following operation, comprising:
After the data generated after detecting the first data center response service request are stored, it is recorded in first data
Storage location information and storage time information in the memory space of the heart；
After receiving the first data synchronization request, control, which is located at, has matching relationship in same city with first data center
The second data center the data are read from the memory space according to the storage time and the storage location information.
7. device according to claim 6, it is characterised in that:
Storage position of the processor in the memory space for calling computer program realization to be recorded in first data center
Before confidence breath and storage time information, the processor calls computer program also to realize following operation, comprising:
By data storage into pre-set volume, wherein each volume has corresponding identification information；
Storage position of the processor in the memory space for calling computer program realization to be recorded in first data center
In the operating process of confidence breath and storage time information, the processor calls computer program to realize following operation, comprising:
Record the identification information and storage time of the volume that the data are stored.
8. device according to claim 6 or 7, which is characterized in that the processor calls the meter in place's memory
Calculation machine program is to realize following operation, further includes:
Send the second data synchronization request；
Receive the storage location and storage time information of the data of the second data center storage；
The storage time information of synchronous temporal information and the data of second data center storage according to the last time, obtains
Second data center within upper primary synchronization time and current synchronization time section in newly-generated data, obtain number of targets
According to；
Obtain the storage location information of the target data；
According to the storage location information of the target data, the target data of second data center is obtained.
9. device according to claim 8, which is characterized in that the processor calls the computer program to realize basis
The storage location information of the target data, in the operating process for obtaining the target data of second data center, the place
Managing device calls the computer program to realize following operation, comprising:
According to the storage location information of the target data, target data is read from second data center, and described in record
The target identification information of target data used volume when being stored in second data center；
According to the target identification information, in the volume with the target identification information of first data center described in storage
Target data.
10. device according to claim 6 or 7, which is characterized in that the processor calls the meter in place's memory
Calculation machine program is to realize following operation, further includes:
The metadata information of equipment in first data center is obtained, wherein the metadata is for rebuilding the equipment
Configuration information；
Send the metadata information of the equipment to long-distance disaster center.
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