CN109257404A - Data back up method, apparatus and system - Google Patents
Data back up method, apparatus and system Download PDFInfo
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- CN109257404A CN109257404A CN201710577163.XA CN201710577163A CN109257404A CN 109257404 A CN109257404 A CN 109257404A CN 201710577163 A CN201710577163 A CN 201710577163A CN 109257404 A CN109257404 A CN 109257404A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
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Abstract
The embodiment of the invention provides a kind of data back up method, apparatus and system, are related to data communication field.The method includes primary main control devices to obtain associated first data and the second data, then sends the first Backup Data association messages to spare main control device, sends first data and second data one by one to the spare main control device；Then the spare main control device backs up first data and second data；After the primary main control device is sent completely, the first Backup Data, which is sent, to the spare main control device cancels association messages, it is realized before and after backing up associated data with this, sends Backup Data association messages respectively and Backup Data cancels association messages, guarantee the integrality of associated data backup.
Description
Technical field
The present invention relates to data communication fields, in particular to a kind of data back up method, apparatus and system.
Background technique
With the development of internet, increasingly higher demands are proposed to the reliability of the network equipment.In order to improve network
The reliability of equipment generallys use dual master control redundancy backup technology in the network device.It, will in equipment normal course of operation
Data on main control board backup to slave control board.When masterslave switchover occurs, slave control board will take over primary master control
Plate guarantees the continual operation of equipment.The existing data for currently, when carrying out data backup between active and standby master control borad, needing to back up
Non-relational data are generally fallen into, that is, the data being backed up are completely independent, between each other without association or dependence, so that existing
Some data backups are relatively easy, and Backup Data is directly sent to slave control board by the application program on main control board, standby
Application program is directly submitted after receiving Backup Data with master control borad, Backup Data is directly handled by application program.Occur it is active and standby fall
After changing, loses, other Backup Datas will not be impacted, slave control board need to only restore to have standby in case of Backup Data
Part data do not need the Backup Data that concern is lost.
The method that existing redundancy technique is related to is based on non-relational data backup proposition, not standby for relational data
The solution of part.
Summary of the invention
The purpose of the present invention is to provide a kind of data back up method, apparatus and system, to improve the above problem.For reality
Existing above-mentioned purpose, the technical solution adopted by the present invention is as follows:
In a first aspect, the embodiment of the invention provides a kind of data back up method, which comprises primary main control device
Obtain associated first data and the second data；The primary main control device sends the first backup number to spare main control device
According to association messages；The primary main control device sends first data and second number to the spare main control device one by one
According to；The spare main control device backs up first data and second data；After the primary main control device is sent completely,
The first Backup Data, which is sent, to the spare main control device cancels association messages.
Second aspect, the embodiment of the invention provides a kind of data back up method, which comprises primary main control device
Associated first data and the second data are obtained, the first Backup Data association messages are sent to spare main control device, to institute
It states spare main control device and sends first data and second data one by one, so as to spare main control device backup described first
Data and second data；After the primary main control device is sent completely, the first backup is sent to the spare main control device
Data cancel association messages.
The third aspect, the embodiment of the invention provides a kind of data backup device, described device include the first transmission unit,
Second transmission unit and third transmission unit.First transmission unit, for obtaining associated first data and the second data,
The first Backup Data association messages are sent to spare main control device.Second transmission unit, for the spare main control device by
One sends first data and second data, so that spare main control device backs up first data and second number
According to.Third transmission unit sends the cancellation association of the first Backup Data to the spare main control device and disappears after being sent completely
Breath.
Fourth aspect, the embodiment of the invention provides a kind of data backup systems, and the system comprises primary main control devices
With spare main control device.Primary main control device is set for obtaining associated first data and the second data to spare master control
Preparation send the first Backup Data association messages.The primary main control device is also used to send one by one to the spare main control device
First data and second data.The spare main control device, for backing up first data and second number
According to.The primary main control device after being also used to be sent completely, sends the first Backup Data to the spare main control device and cancels pass
Join message.
The embodiment of the invention provides a kind of data back up method, apparatus and system, primary main control device obtains associated
The first data and the second data, then to spare main control device send the first Backup Data association messages, to the spare master
Control equipment sends first data and second data one by one；Then the spare main control device backs up first data
With second data；After the primary main control device is sent completely, the first Backup Data is sent to the spare main control device
Cancel association messages, realized before and after backing up associated data with this, sends Backup Data association messages and backup number respectively
According to association messages are cancelled, guarantee the integrality of associated data backup.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that by implementing understanding of the embodiment of the present invention.The objectives and other advantages of the invention can be by written theory
Specifically noted structure is achieved and obtained in bright book, claims and attached drawing.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural block diagram of the data backup system of the embodiment of the present invention；
Fig. 2 is a kind of flow chart of data back up method provided in an embodiment of the present invention；
Fig. 3 is the flow chart of another data back up method provided in an embodiment of the present invention；
Fig. 4 is a kind of structural block diagram of data backup device provided in an 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 scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
The following each embodiments of the present invention are can be applied to unless otherwise instructed in data backup system 200 as shown in Figure 1,
As shown in Figure 1, the system 200 includes primary main control device 100 and spare main control device 210.
Primary main control device 100, for obtaining associated first data and the second data, to spare main control device
210 send the first Backup Data association messages.
The primary main control device 100, be also used to send one by one to the spare main control device 210 first data and
Second data.
The spare main control device 210, for backing up first data and second data.
After being also used to be sent completely, it is standby to send first to the spare main control device 210 for the primary main control device 100
Part data cancel association messages.
As an implementation, the data backup system 200 can be distributed network equipment, the distributed network
Network equipment may include primary main control device 100 and spare main control device 210.Wherein, the primary main control device 100 is primary
Master control borad, the spare main control device 210 are slave control board, the main control board and slave control board electrical connection.
Referring to Fig. 2, the method includes the steps S300, step the embodiment of the invention provides a kind of data back up method
Rapid S310, step S320, step S330, step S340, step S350 and step S360.
Step S300: primary main control device obtains associated first data and the second data.
When primary main control device executes data backup, if there are interrelated or dependence between the data of backup,
Then think these data relation belonging to type data.For example, there are configuration data and operation data, fortune for the network equipment
Row data depend on configuration data, and when carrying out data backup, the two is with regard to relation belonging to type data.In the present embodiment, first
Data can be configuration data, and the second data can be operation data.
Step S310: the primary main control device sends the first Backup Data association messages to spare main control device.
In the present embodiment, rollback point can be set by way of sending Backup Data association messages, and by rollback point
It is defined as RollbackPoint message.Then the application program on primary main control device is first when backing up to relational data
It is first the first RollbackPoint message to the Backup Data association messages that spare main control device is sent.For example, configuration data
When variation, corresponding operation data variation is triggered, at this point, configuration data and operation data will be backed up, then before backup
First send the first RollbackPoint message.
Step S320: the primary main control device sends first data and described to the spare main control device one by one
Second data.
Primary main control device starts real data backup, using single after sending the first RollbackPoint message
The mode of Dynamic data exchange backed up one by one carries out.For example, the backup for configuration data and operation data, first by configuration data
Spare main control device is backuped to, then operation data is backuped into spare main control device.
Step S330: the spare main control device backs up first data and second data.
As an implementation, the spare main control device is after receiving the first Backup Data association messages,
Backup Data buffer queue is established, by first data and second data backup to the Backup Data buffer queue
In.
For example, spare main control device after receiving the first RollbackPoint message, establishes Backup Data buffer queue
RollbackQueue.Spare main control device continues to true Backup Data, and the Backup Data received is added to
In the Backup Data buffer queue RollbackQueue being set up.This partial data temporarily not on give on spare main control device
Application program, for application program, expression do not receive any Backup Data.
Step S340: after the primary main control device is sent completely, the first backup number is sent to the spare main control device
According to cancellation association messages.
In the present embodiment, cancellation rollback point can be set by way of sending Backup Data and cancelling association messages, and
Rollback point will be cancelled and be defined as RollbackCancel message.Primary main control device by relationship type Backup Data i.e. the first data and
After second data are sent completely, the first RollbackCancel message is sent to spare main control device.First
RollbackCancel message and the first RollbackPoint message are matched, for the complete of identified relationships type Backup Data
Whole property.
As an implementation, before step S340, when primary main control device also gets relationship type Backup Data,
The method also includes:
When the primary main control device detects third data associated with second data, the third number is obtained
According to the second Backup Data association messages of the spare main control device transmission, to the spare main control device transmission third
Data；
The spare main control device is by the third data backup into the Backup Data buffer queue；
After the primary main control device is sent completely, the second Backup Data is sent to the spare main control device and cancels association
Message.
It should be noted that this part operation can use for reference step S300, step S310, step S320, step S330 and
Step S340, which is not described herein again.
It is understood that similar operation can be repeated, primary main control device counts third data the associated 4th
According to the spare main control device ... is sent to, which is not described herein again.
Further, as an implementation, be based on step S320, primary main control device when sending the second data,
Detect that the second data include at least two associated second subdatas, step S320 may include:
The primary main control device sends first data to the spare main control device, so that the spare master control is set
It is standby by first data backup into the Backup Data buffer queue；
It includes at least two associated second subdatas that the primary main control device, which gets second data, to institute
It states spare main control device and sends third Backup Data association messages, send described at least two one by one to the spare main control device
Associated second subdata, so that the spare main control device backs up to described at least two associated second subdatas
In the Backup Data buffer queue；
After the primary main control device is sent completely, third Backup Data is sent to the spare main control device and cancels association
Message.
It should be noted that this part operation can use for reference step S300, step S310, step S320, step S330 and
Step S340, which is not described herein again.
Further, in order to guarantee that the received Backup Data of spare main control device is complete, the method can also include:
After the spare main control device receives the first Backup Data association messages, is added to current counter
One preset constant；After the spare main control device receives the third Backup Data association messages, to current counter
Add the second preset constant；Correspondingly, after the spare main control device receives the third Backup Data cancellation association messages,
To the current counter preset constant that subtracts the second；The spare main control device receives the first Backup Data cancellation association and disappears
After breath, first preset constant is subtracted to current counter；When the spare main control device detects current counter
Value when being third preset constant, judge that Backup Data is complete, the initial counter value of the counter is third preset constant.
Similarly, after the spare main control device receives the second Backup Data association messages, to current counting
Device adds first preset constant；Correspondingly, the spare main control device receives the second Backup Data cancellation association and disappears
After breath, to the current counter preset constant that subtracts the first.
In the present embodiment, the first preset constant can be 1, and the second preset constant can be 1, and third preset constant can be with
It is 0.Spare main control device is after receiving the first Backup Data backup association messages, preparatory initialization counter, counter
Initial counter value be third preset constant.Spare main control device often receives a RollbackPoint message, to current
Counter RollbackCounter execute plus 1；A RollbackCancel message is often received, to current counter
RollbackCounter execution subtracts 1.When counter RollbackCounter reduces to 0, indicate that relational data backup is completed,
Relational data backup is set to have atomicity.It is not default to the first preset constant, the second preset constant and third in the present embodiment
The value of constant is defined.
Step S350: when the spare main control device detects that the value of current counter is the third preset constant,
Data in current backup data buffer storage queue are uploaded to the database in the spare main control device.
In the present embodiment, the primary main control device and spare main control device, which are respectively established, is distributed formula database.It is main
It is each on primary main control device and spare main control device with respective distributed data base on main control device and spare main control device
From all application programs, respectively providing the unified memory interface of standard may be implemented by respective memory interface to each
From Distributed Database Operation and control.
The spare main control device detects that current counter RollbackCounter is reduced to and presets Counter Value
When, indicate that relational data backup is completed.At this point, one by one by all Backup Datas cached in current backup data buffer storage queue
Take out the distributed data base being uploaded in the spare main control device.Then application program is obtained by calling memory interface
The data of distributed data base in spare main control device are handled by the complete paired data of application program.For application program
For, only when counter RollbackCounter reduces to initial counter value, i.e., when relational data backup is complete,
Backup Data can be received.Application program is realized when executing relational data backup, without being by relational data dismantling
Non-relational data can directly back up relational data, reduce requirement of the application program to Backup Data form, drop
Low application program carries out the difficulty of data backup.
Step S360: when the spare main control device detects masterslave switchover, detect whether current counter is described
Third preset constant, if it is not, then removing the data in current backup data buffer storage queue.
When the spare main control device detects masterslave switchover, spare main control device upgrade to primary main control device it
Before, nonce counter RollbackCounter is detected, if RollbackCounter is not equal to initial counter value,
Indicate that relational data backup is imperfect, spare main control device will cache in Backup Data buffer queue RollbackQueue
All Backup Datas all abandon.For application program, expression does not receive any Backup Data.Due in masterslave switchover
Afterwards, the relational data for being not backed up completion, the incomplete Backup Data of the non-actual treatment of application program, so that answering directly have been abandoned
Do not need to carry out retracting to incomplete dirty data with program/smooth equal processing, reduces application program to Backup Data processing
Complexity.
The embodiment of the invention provides a kind of data back up method, primary main control device obtain associated first data with
And second data, then the first Backup Data association messages are sent to spare main control device, it is sent out one by one to the spare main control device
Send first data and second data；Then the spare main control device backs up first data and second number
According to；After the primary main control device is sent completely, the first Backup Data is sent to the spare main control device and cancels association messages,
It is realized before and after backing up associated data with this, transmission Backup Data association messages are associated with Backup Data cancellation and disappear respectively
Breath guarantees the integrality of associated data backup.
Referring to Fig. 3, the method includes the steps S400 and step the embodiment of the invention provides a kind of data back up method
Rapid S410.
Step S400: primary main control device obtains associated first data and the second data, to spare main control device
The first Backup Data association messages are sent, send first data and second number one by one to the spare main control device
According to so that spare main control device backs up first data and second data.
As an implementation, primary main control device obtains associated first data and the second data, to spare
Main control device sends the first Backup Data association messages, sends first data and described one by one to the spare main control device
Second data establish Backup Data so that the spare main control device is after receiving the first Backup Data association messages
Buffer queue, by first data and second data backup into the Backup Data buffer queue.
Step S410: after the primary main control device is sent completely, the first backup number is sent to the spare main control device
According to cancellation association messages.
As an implementation, before step S410, when primary main control device also gets relationship type Backup Data,
The method also includes:
When the primary main control device detects third data associated with second data, the third number is obtained
According to the second Backup Data association messages of the spare main control device transmission, to the spare main control device transmission third
Data, so as to the spare main control device by the third data backup into the Backup Data buffer queue；
After the primary main control device is sent completely, the second Backup Data is sent to the spare main control device and cancels association
Message.
Further, as an implementation, be based on step S400, primary main control device when sending the second data,
Detect that the second data include at least two associated second subdatas, step S400 may include:
The primary main control device sends first data to the spare main control device, so that the spare master control is set
It is standby by first data backup into the Backup Data buffer queue；
It includes at least two associated second subdatas that the primary main control device, which gets second data, to institute
It states spare main control device and sends third Backup Data association messages, send described at least two one by one to the spare main control device
Associated second subdata, so that the spare main control device backs up to described at least two associated second subdatas
In the Backup Data buffer queue；
After the primary main control device is sent completely, third Backup Data is sent to the spare main control device and cancels association
Message.
The embodiment of the invention provides a kind of data back up method, primary main control device obtain associated first data with
And second data, the first Backup Data association messages are sent to spare main control device, are sent one by one to the spare main control device
First data and second data, so that spare main control device backs up first data and second data；So
After the primary main control device is sent completely afterwards, the first Backup Data is sent to the spare main control device and cancels association messages,
It is realized before and after backing up associated data with this, transmission Backup Data association messages are associated with Backup Data cancellation and disappear respectively
Breath guarantees the integrality of associated data backup.
Referring to Fig. 4, the embodiment of the invention provides a kind of data backup device 500, described device 500 includes: first
Transmission unit 510 and the second transmission unit 520 and third transmission unit 540.
First transmission unit 510 is sent out for obtaining associated first data and the second data to spare main control device
Send the first Backup Data association messages.
Second transmission unit 520, for sending first data and described second one by one to the spare main control device
Data, so that spare main control device backs up first data and second data.
As an implementation, second transmission unit 520 may include the second transmission sub-unit 521.
Second transmission sub-unit 521, for sending first data to the spare main control device, so as to described spare
Main control device is by first data backup into the Backup Data buffer queue；Getting second data includes at least
Two kinds of associated second subdatas send third Backup Data association messages to the spare main control device, to described spare
Main control device sends described at least two associated second subdatas one by one, so that the spare main control device general is described at least
Two kinds of associated second subdatas back up in the Backup Data buffer queue；After being sent completely, to the spare master control
Equipment sends third Backup Data and cancels association messages.
Third transmission unit 540 sends the first Backup Data to the spare main control device and cancels after being sent completely
Association messages.
Described device 500 can also include detection unit 530.
Detection unit 530 when for detecting third data associated with second data, obtains the third number
According to the second Backup Data association messages of the spare main control device transmission, to the spare main control device transmission third
Data, so as to the spare main control device by the third data backup into the Backup Data buffer queue；It is sent completely
Afterwards, the second Backup Data is sent to the spare main control device cancel association messages.
The above each unit can be by software code realization, at this point, above-mentioned each unit can be stored in memory.More than
Each unit can equally be realized by hardware such as IC chip.
The technical effect of data backup device 500 provided in an embodiment of the present invention, realization principle and generation and aforementioned side
Method embodiment is identical, and to briefly describe, Installation practice part does not refer to place, can refer in corresponding in preceding method embodiment
Hold.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of data back up method, which is characterized in that the described method includes:
Primary main control device obtains associated first data and the second data；
The primary main control device sends the first Backup Data association messages to spare main control device；
The primary main control device sends first data and second data to the spare main control device one by one；
The spare main control device backs up first data and second data；
After the primary main control device is sent completely, the cancellation association of the first Backup Data is sent to the spare main control device and is disappeared
Breath.
2. the method according to claim 1, wherein the spare main control device backs up first data and institute
State the second data, comprising:
The spare main control device establishes Backup Data buffer queue after receiving the first Backup Data association messages,
By first data and second data backup into the Backup Data buffer queue.
3. according to the method described in claim 2, it is characterized in that, after the primary main control device is sent completely, to described standby
Before sending the first Backup Data cancellation association messages with main control device, the method also includes:
When the primary main control device detects third data associated with second data, the third data are obtained,
The second Backup Data association messages are sent to the spare main control device, send the third number to the spare main control device
According to；
The spare main control device is by the third data backup into the Backup Data buffer queue；
After the primary main control device is sent completely, the cancellation association of the second Backup Data is sent to the spare main control device and is disappeared
Breath.
4. according to the method described in claim 2, it is characterized in that, the primary main control device to the spare main control device by
One transmission first data and second data include:
The primary main control device sends first data to the spare main control device, so that the spare main control device will
First data backup is into the Backup Data buffer queue；
It includes at least two associated second subdatas that the primary main control device, which gets second data, to described standby
Third Backup Data association messages are sent with main control device, it is related to send described at least two one by one to the spare main control device
Second subdata of connection, so as to the spare main control device described at least two associated second subdatas are backed up to it is described
In Backup Data buffer queue；
After the primary main control device is sent completely, the cancellation association of third Backup Data is sent to the spare main control device and is disappeared
Breath.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
After the spare main control device receives the first Backup Data association messages, current counter is added first pre-
If constant；
After the spare main control device receives the third Backup Data association messages, current counter is added second pre-
If constant；
Correspondingly, after the spare main control device receives the third Backup Data cancellation association messages, to current meter
Preset constant that number device subtracts the second；
After the spare main control device receives the first Backup Data cancellation association messages, institute is subtracted to current counter
State the first preset constant；
When the spare main control device detects that the value of current counter is third preset constant, judge that Backup Data is complete
Whole, the initial counter value of the counter is third preset constant.
6. according to the method described in claim 5, it is characterized in that, the method also includes:
When the spare main control device detects that the value of current counter is the third preset constant, by current backup data
Data in buffer queue are uploaded to the database in the spare main control device.
7. according to the method described in claim 5, it is characterized in that, the method also includes:
When the spare main control device detects masterslave switchover, detect whether current counter is the third preset constant,
If it is not, then removing the data in current backup data buffer storage queue.
8. a kind of data back up method, which is characterized in that the described method includes:
Primary main control device obtains associated first data and the second data, sends the first backup number to spare main control device
According to association messages, first data and second data are sent one by one to the spare main control device, so as to spare master control
First data described in device backup and second data；After the primary main control device is sent completely, to the spare master control
Equipment sends the first Backup Data and cancels association messages.
9. a kind of data backup device, which is characterized in that described device includes:
First transmission unit sends first to spare main control device for obtaining associated first data and the second data
Backup Data association messages；
Second transmission unit, for sending first data and second data one by one to the spare main control device, with
Just spare main control device backs up first data and second data；
Third transmission unit sends the cancellation association of the first Backup Data to the spare main control device and disappears after being sent completely
Breath.
10. a kind of data backup system, which is characterized in that the system comprises primary main control device and spare main control device,
Primary main control device sends first to spare main control device for obtaining associated first data and the second data
Backup Data association messages；
The primary main control device is also used to send first data and second number one by one to the spare main control device
According to；
The spare main control device, for backing up first data and second data；
The primary main control device after being also used to be sent completely, sends the first Backup Data to the spare main control device and cancels
Association messages.
Priority Applications (1)
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