CN105278522B - A kind of remote copy method and system - Google Patents
A kind of remote copy method and system Download PDFInfo
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- CN105278522B CN105278522B CN201510674437.8A CN201510674437A CN105278522B CN 105278522 B CN105278522 B CN 105278522B CN 201510674437 A CN201510674437 A CN 201510674437A CN 105278522 B CN105278522 B CN 105278522B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000009849 deactivation Effects 0.000 claims abstract description 21
- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000004913 activation Effects 0.000 claims abstract description 11
- 230000003213 activating effect Effects 0.000 claims abstract description 9
- 230000002779 inactivation Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 description 2
- 238000013500 data storage Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24175—Redundant communication channel, if one fails use the other
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention discloses a kind of remote copy method and system, this method includes：Master controller to source node and the master controller from controller and destination node and it is respectively provided with remote copy information from controller, wherein remote copy information, including realize the required information of remote copy between source node and destination node；It is detecting that the master controller of source node or destination node deposits when abnormal, deactivation maneuver is carried out to master controller, and is set newly from controller master controller to, wherein, deactivation maneuver, including master controller stop the remote copy with peer node, and stop the read-write operation to metadata；It will be set as new master controller from controller, and new master controller will be operated into line activating according to pre-set remote copy information, wherein activation operation, including new master controller open the remote copy with peer node, read metadata.This method ensure that user data is backed up in realtime, the reliability of user data transmission is improved.
Description
Technical field
The present invention relates to field of computer technology, espespecially a kind of remote copy method and system.
Background technology
Remote copy technology refers to that user data is established data storage respectively in source node and destination node, for realizing
Protect the function of user data.In remote copy technology, the user data received is real-time transmitted to destination node by source node,
Only when destination node is received entirely the user data of source node transmission, source node is just written to client returned data
The information of work(, to achieve the purpose that user data is backed up in realtime.
In general, source node and destination node are controlled by two controllers, to ensure that a controller goes out wherein
When existing failure, control can be realized using another controller.However, the remote copy function of source node and destination node is equal
It can not switch between two controllers of itself, i.e., one of source node or destination node controller suspension occur, breaks
When the failures such as electricity, the remote copy function of source node or destination node cannot be realized by another controller, in this way can not
Ensure backing up in realtime for user data, reduces the reliability of user data transmission.
Invention content
In order to solve the above technical problem, the present invention provides a kind of remote copy method and systems, can ensure user
Data are backed up in realtime, and the reliability of user data transmission is improved.
In a first aspect, the embodiment of the present invention provides a kind of remote copy method, including：Master controller to source node and from
The master controller of controller and destination node and from controller, is respectively provided with remote copy information, wherein remote copy information
Including realizing the required information of remote copy between source node and destination node；Detecting source node or destination node
Master controller is deposited when abnormal, carries out deactivation maneuver to the master controller, and set newly from control the master controller to
Device, wherein deactivation maneuver includes the remote copy of master controller stopping and peer node, and the read-write stopped to metadata is grasped
Make；To be set as new master controller from controller, and according to pre-set remote copy information to the new master controller into
Line activating operates, wherein activation operation includes the remote copy of new master controller unlatching and peer node, reads metadata.
Further, to the master controller of source node and from controller and destination node master controller and from control
Device processed is respectively provided with after remote copy information, further includes：In the master controller of source node, the slave controller of source node, purpose section
The master controller of point and establishing between any two for the slave controller of destination node connect.
Further, detecting that the master controller of source node or destination node deposits when abnormal, to the master controller
After carrying out deactivation maneuver, further include：The current processing status that data are received to the master controller judges；If current
Processing state is untreated state, then the master controller generates the error code of data, and sends the mistake to client
Code；If current processing status is the state that handling, the master controller interrupts data processing, generates the wrong generation of data
Code, and send the error code to client；If current processing status is pending internal callback state, the main control
Device executes internal readjustment to data, and generates handling result.
Second aspect, the embodiment of the present invention provide a kind of remote copy system, including：Device, inactivation device are set and swashed
Removable mounting is set, wherein：The setting device is used for the master controller to source node and the master control from controller and destination node
Device processed and from controller, is respectively provided with remote copy information, wherein remote copy information, including realize source node and destination node
Between the required information of remote copy；The inactivation device, in the main control for detecting source node or destination node
Device is deposited when abnormal, carries out deactivation maneuver to the master controller, and set newly from controller the master controller to,
In, deactivation maneuver, including master controller stop the remote copy with peer node, and stop the read-write operation to metadata；Institute
Activation device is stated, for new master controller will to be set as from controller, and it is pre-set long-range multiple according to the setting device
Information processed operates the new master controller into line activating, wherein activation operation, including new master controller is opened and peer node
Remote copy, read metadata from controller.
Further, the setting device is additionally operable to：To the master controller of source node and from controller and purpose section
The master controller of point and from controller, is respectively provided with after remote copy information, the master controller of source node, source node from control
Device, the master controller of destination node and the establishing between any two for slave controller of destination node processed connect.
Further, the inactivation device is additionally operable to：After carrying out deactivation maneuver to the master controller, to the master
The current processing status that controller receives data is judged；If current processing status is untreated state, the master control
Device processed generates the error code of data, and sends the error code to client；If current processing status is to handle shape
State, the then master controller interruption data processing, generates the error code of data, and send the error code to client；
If current processing status is pending internal callback state, the master controller executes internal readjustment to data, and at generation
Manage result.
A kind of remote copy method and system of the offer of the present invention, by master controller to source node and from control
The master controller of device and destination node and it is respectively provided with remote copy information from controller, wherein remote copy information, including
Realize the required information of remote copy between source node and destination node；In the master control for detecting source node or destination node
Device processed is deposited when abnormal, carries out deactivation maneuver to master controller, and set newly from controller master controller to；It will be from controller
It is set as new master controller, and new master controller is operated into line activating according to pre-set remote copy information, ensure that
User data is backed up in realtime, and the reliability of user data transmission is improved.
Description of the drawings
Attached drawing is used for providing further understanding technical solution of the present invention, and a part for constitution instruction, 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 a kind of flow chart of remote copy method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of another remote copy method provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of remote copy system provided in an embodiment of the present invention.
Specific implementation mode
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 mutually can arbitrarily combine.
Step shown in the flowchart of the accompanying drawings can be in the computer system of such as a group of computer-executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be with suitable different from herein
Sequence executes shown or described step.
Referring to Fig. 1, the figure shows a kind of remote copy methods provided in an embodiment of the present invention, including：
Step 101：Master controller to source node and the master controller from controller and destination node and from control
Device is respectively provided with remote copy information, wherein remote copy information, including realize long-range multiple between source node and destination node
Make required all information；
The required information of remote copy between source node and destination node is realized, when realizing remote copy for this field
Usual information, for example, user data mark, data transmission block size, data check type, message transmission rate, network connect
Connect information etc..
Wherein, source node and destination node are controlled by two controllers.In two controllers, it is currently running
Controller is master controller, the other is from controller.
Due in the prior art when source node or the master controller of destination node occur abnormal, master controller is to from control
Device switching needs the remote copy information on master controller being once again set up from controller, and is once again set up remote copy letter
Breath can increase master controller and be taken to what is switched from controller, therefore client can be caused to lose user data.And in the present invention
In embodiment, by remote copy information being respectively set in master controller and from controller so that remote copy is from main control
Device passes through subsequent operation to the remote copy information for only needing basis to be set from controller when switching from controller
Automatically switch to realize, ensured being normally carried out for remote copy, avoids client and lose user data.
Further, to the master controller of source node and from controller and destination node master controller and from control
Device is respectively provided with after remote copy information, further includes：In the master controller, the slave controller of source node, destination node of source node
Master controller and destination node slave controller between any two establish connection.
After remote copy information is set, need four controllers, i.e., the master controller of source node, source node from
The slave controller of controller, the master controller of destination node and destination node establishes connection between any two, that is to say, that
It needs to establish four remote copy redundant links between source node and destination node so that control of the remote copy from failure
After device is switched to another controller, the remote copy between source node and destination node can still keep connecting, and ensure source
The real-time and validity of remote copy connection between node and destination node.
Step 102：It is detecting that the master controller of source node or destination node deposits when abnormal, master controller is being lost
Operation living, and set newly from controller master controller to；Wherein, deactivation maneuver, including master controller stops and peer node
Remote copy, and stop to the read-write operation of metadata.
It should be noted that if above-mentioned master controller is the master controller of source node, then peer node is purpose node；If
Above-mentioned master controller is the master controller of purpose node, then peer node is source node.
Metadata mainly describes data attribute information to describe the data of data, for supporting instruction such as to store position
It sets, the functions such as historical data, resource lookup, file record.
Further, detect the master controller of source node or destination node deposit when abnormal, to master controller carry out
After deactivation maneuver, further include：The current processing status that data are received to master controller judges；If current processing status
For untreated state, then master controller generates the error code of data, and sends error code to client；If currently processed shape
State is to handle state, then master controller interrupts data processing, generates the error code of data, and send mistake to client
Code；If current processing status is pending internal callback state, master controller executes internal readjustment to data, and at generation
Manage result.
It should be noted that the data in untreated state, to come into master controller but not carrying out corresponding position also
The data of reason；Data in the state that handling carry out remote copy processing to data for master controller but do not give birth to also
At the data of caching；Data in pending internal callback state, generate for master controller and cache and pending inside is waited to return
The data of tune.
Step 103：New master controller will be set as from controller, and according to pre-set remote copy information to newly leading
Controller is operated into line activating, wherein activation operation, including new master controller open the remote copy with peer node, read
Metadata.
You need to add is that remote copy information includes needed for the remote copy realized between source node and destination node
The information wanted, and new master controller opens the remote copy with peer node using the required information of remote copy and reads member
Data are technical process well-known to those skilled in the art, therefore, are not repeating the process here.
As can be seen that by the master controller in source node and the master controller from controller and destination node and from control
Remote copy information is respectively provided in device so that when one of source node or destination node controller break down, source node
Or destination node can utilize another controller that remote copy function is passed through itself by pre-set remote copy information
It realizes, i.e., remote copy function switch is ensured that into backing up in realtime for user data to another controller of itself.
Referring to Fig. 2, the figure shows another remote copy methods provided in an embodiment of the present invention, with the master control of source node
Device processed automatically switches to remote copy when breaking down for the slave controller of source node, is proposed to the embodiment of the present invention remote
Journey clone method is described in detail, and method includes：
Step 201：Master controller to source node and the master controller from controller and destination node and from control
Remote copy information is respectively set in device；
Step 202：The master controller of source node receives when cancelling data processing instructions, to source node and destination node
Remote copy carries out data jamming；
Wherein, when the master controller of source node receives cancellation data processing instructions, illustrate that the master controller of source node goes out
Existing failure.The master controller of source node will carry out data jamming operation with the remote copy of peer node, i.e., no longer receives data
Processing request, stops the remote copy with peer node.
Step 203：The master controller of source node carries out the data having been received according to the current processing status of data
Corresponding processing；
Step 204：The master controller of source node is set to, newly from controller, the slave controller of source node to be set as new
Master controller；
Step 205：The new master controller of source node is opened and destination node according to pre-set remote copy information
Metadata is read in remote copy.
A kind of remote copy method of the offer of the present invention, by master controller to source node and from controller, and
The master controller of destination node and it is respectively provided with remote copy information from controller, wherein remote copy information, including realize source section
The required information of remote copy between point and destination node；Exist in the master controller for detecting source node or destination node
When abnormal, deactivation maneuver is carried out to master controller, and master controller is set newly from controller to；It will be set as new from controller
Master controller, and new master controller is operated into line activating according to pre-set remote copy information, it ensure that user data
Back up in realtime, improve the reliability of user data transmission.
Referring to Fig. 3, the figure shows a kind of remote copy system provided in an embodiment of the present invention, which includes：Setting
Device 301, inactivation device 302 and activation device 303, wherein：
Device 301 is set, for the master controller of source node and from controller and the master controller of destination node and
From controller, it is respectively provided with remote copy information, wherein remote copy information, including realize between source node and destination node
The required information of remote copy；
Device 302 is inactivated, for detecting that the master controller of source node or destination node deposits when abnormal, to main control
Device carries out deactivation maneuver, and sets newly from controller master controller to, wherein deactivation maneuver, including master controller stop with
The remote copy of peer node, and stop the read-write operation to metadata；
Device 303 is activated, is pre-set for new master controller will to be set as from controller, and according to setting device 301
Remote copy information to new master controller into line activating operate, wherein activation operation, including new master controller open and opposite end
Metadata is read in the remote copy of node.
Further, setting device 301 is additionally operable to the master controller of source node and from controller and destination node
Master controller and from controller, be respectively provided with after remote copy information, the master controller of source node, source node from control
The slave controller of device, the master controller of destination node and destination node establishes connection between any two.
Further, inactivation device 302 is additionally operable to after carrying out deactivation maneuver to master controller, is received to master controller
Current processing status to data is judged；If current processing status is untreated state, master controller generates data
Error code, and send error code to client；If current processing status is the state that handling, master controller interrupts number
According to processing, the error code of data is generated, and error code is sent to client；If current processing status returns for pending inside
Tune state, then master controller executes internal readjustment to data, and generates handling result.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not limited to the present invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (4)
1. a kind of remote copy method, which is characterized in that including：
Master controller to source node and the master controller from controller and destination node and from controller, are respectively provided with long-range
Copy Info, the master controller of source node, the slave controller of source node, the master controller of destination node and destination node from
Controller establishes connection between any two；Wherein, remote copy information includes remote between realization source node and destination node
Journey replicates required information；Remote copy information include user data mark, data transmission block size, data check type,
Message transmission rate, network connection information；
Detect the master controller of source node or destination node deposit when abnormal, to the master controller carry out deactivation maneuver,
And set newly from controller the master controller to, wherein deactivation maneuver includes that master controller stopping is remote with peer node
Journey replicates, and stops the read-write operation to metadata；
To be set as new master controller from controller, and according to pre-set remote copy information to the new master controller into
Line activating operates, wherein activation operation includes the remote copy of new master controller unlatching and peer node, reads metadata.
2. remote copy method according to claim 1, which is characterized in that in the master for detecting source node or destination node
Controller is deposited when abnormal, after carrying out deactivation maneuver to the master controller, further includes：
The current processing status that data are received to the master controller judges；If current processing status is untreated shape
State, then the master controller generates the error code of data, and sends the error code to client；If current processing status
To handle state, then the master controller interrupts data processing, generates the error code of data, and send institute to client
State error code；If current processing status is pending internal callback state, the master controller executes internal return to data
It adjusts, and generates handling result.
3. a kind of remote copy system, which is characterized in that including：Device, inactivation device and activation device are set, wherein：
The setting device, for the master controller of source node and from controller and destination node master controller and from
Controller is respectively provided with remote copy information, in the master control of the master controller of source node, the slave controller, destination node of source node
Device processed and establishing between any two for the slave controller of destination node connect；Wherein, remote copy information, including realize source node
The required information of remote copy between destination node；Remote copy information includes user data mark, data transmission block
Size, data check type, message transmission rate, network connection information；
The inactivation device, for detecting that the master controller of source node or destination node deposits when abnormal, to the master control
Device processed carries out deactivation maneuver, and sets newly from controller the master controller to, wherein deactivation maneuver, including master controller
Stop the remote copy with peer node, and stops the read-write operation to metadata；
The activation device, for new master controller will to be set as from controller, and it is pre-set according to the setting device
Remote copy information to the new master controller into line activating operate, wherein activation operation, including new master controller open with it is right
The remote copy of end node reads metadata from controller.
4. remote copy system according to claim 3, which is characterized in that the inactivation device is additionally operable to：
After carrying out deactivation maneuver to the master controller, to the master controller receive the current processing status of data into
Row judges；If current processing status is untreated state, the master controller generates the error code of data, and to client
Send the error code；If current processing status is the state that handling, the master controller interrupts data processing, generates
The error code of data, and send the error code to client；If current processing status is pending internal callback state,
Then the master controller executes internal readjustment to data, and generates handling result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510674437.8A CN105278522B (en) | 2015-10-16 | 2015-10-16 | A kind of remote copy method and system |
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| CN201510674437.8A CN105278522B (en) | 2015-10-16 | 2015-10-16 | A kind of remote copy method and system |
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| CN105278522B true CN105278522B (en) | 2018-09-14 |
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| US6973586B2 (en) * | 2002-04-29 | 2005-12-06 | International Business Machines Corporation | System and method for automatic dynamic address switching |
| US7085956B2 (en) * | 2002-04-29 | 2006-08-01 | International Business Machines Corporation | System and method for concurrent logical device swapping |
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