CN107451268A - A kind of method that suspension towards real-time data base resumes - Google Patents
A kind of method that suspension towards real-time data base resumes Download PDFInfo
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- CN107451268A CN107451268A CN201710653712.7A CN201710653712A CN107451268A CN 107451268 A CN107451268 A CN 107451268A CN 201710653712 A CN201710653712 A CN 201710653712A CN 107451268 A CN107451268 A CN 107451268A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2455—Query execution
- G06F16/24552—Database cache management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/25—Integrating or interfacing systems involving database management systems
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Abstract
Whether the present invention provides a kind of method that resumes of suspension towards real-time data base, monitor in real time normal for the transmission network that extracts the communication interface of real time data in real-time data base；When transmission network is abnormal, current real-time data is cached into region of memory as historical data automatically, after network recovery to be transmitted is normal, cached historical data is transmitted while transmitting current real-time data.The present invention passes through data transfer detection and historical data caching function; by the data storage gathered during communication abnormality state to spatial cache; after detecting that communication abnormality recovers; one side communication interface collection push real time data; on the other hand cached historical data is pushed, drastically increases the safety and reliability of production process real time data.
Description
Technical field
The present invention relates to a kind of method that suspension towards real-time data base resumes, and belongs to industrial automatic control technology neck
Domain.
Background technology
Real-time data base is the support for developing real-time control system, data collecting system, computer integrated manufacturing system etc.
Software.In workflow industry, production automation system monitoring and control largely are carried out using real-time data base, is the management of enterprise
Scheduling, data analysis, decision support and remotely monitor provide Real-time Data Service and a variety of data management functions.Real-time data base
Have become the Base data platform of IT application in enterprises, can directly gather the various data obtained during enterprise operation in real time,
And be translated into the effective public information of all kinds of business, meet enterprise production management, enterprise process monitoring, enterprise operation pipe
To real time information integrality, uniformity, the demand shared safely between reason, between enterprise automation system and management information system
Set up the bridge of information communication.Help each departments that are in charge of manging enterprises of enterprise to utilize these crucial real time information, improve production
The operation efficiency of sale.And the real time data accumulated be because can reflect the occurrence and development process of manufacture system, therefore to pipe
Reason personnel also have important reference value, and the real time data generally accumulated all temporally is saved with classification, here it is
Historical data.
In enterprise's every resource of interest, production process information is important resource, if can not solve to produce
Journey information in real time, the problem of effectively uploading, still will can not make full use of and ensure that manufacturing enterprise's production process performs management system
System MES and enterprise resource plan management system ERP investment.Yet with the complexity of industrial control system whole network, often
Some period can often be caused, the network communication in some local scope is interrupted, and losing for data is will result in if dealt with improperly
Lose.
Present techniques are namely based on the deficiencies in the prior art, and detection and data buffer storage are transmitted in communication interface interpolation data
Function.After data-transmission interruptions are detected, by real-time data memory to spatial cache, after network recovery is detected, a side
Face communication interface collection push real time data, on the other hand pushes data cached, realizes that the suspension to historical data resumes.
The content of the invention
The technical problem to be solved in the present invention, it is to provide a kind of method that suspension towards real-time data base resumes, leads to
Data transfer detection and historical data caching function are crossed, by the data storage gathered during communication abnormality state to caching sky
Between, after detecting that communication abnormality recovers, one side communication interface collection push real time data, on the other hand push is cached
Historical data.
What the present invention was realized in：A kind of method that suspension towards real-time data base resumes, monitor in real time for carrying
Take the transmission network of the communication interface of real time data in real-time data base whether normal；When transmission network is abnormal, automatically will
Current real-time data, which is cached into region of memory, is used as historical data, after network recovery to be transmitted is normal, transmits current number in real time
According to while transmit cached historical data.
Further, the method for the caching is that current real-time data is packaged into data according to fixed collection period
Bag, and increase corresponding time tag on packet, and arrangement caching is carried out in chronological order.
The realization that monitors in real time is：In the data sending terminal of communication interface, data transfer detection module, the number are set
Include the first detection unit and the second detection unit according to transmission detection module, wherein, first detection unit is constantly in work
Make state, second detection unit only occurs just to be activated after abnormal and recovery is normal in transmission network.
Before the data sending terminal and data receiver of the communication interface establish connection, the value of the first detection unit is 0, and
After foundation connection and first packet are sent successfully, the value of first detection unit is 1；If data receiver is being set
The signal of successful data reception bag is returned in time, then the value of the first detection unit resets to 0, continues to transmit next treat
The packet that receiving terminal receives；If data receiver does not return to the signal of successful data reception bag in setting time section,
The value of first detection unit keeps constant, and stores the time tag corresponding to the current packet transmitted not successfully, simultaneously will
The packet not sent is sequentially stored into spatial cache.
After transmission network recovers normal, the data sending terminal will send and be carried by what freshly harvested real time data generated
The packet of newest time tag, and call the second detection unit to be monitored, the value of the second detection unit is 0, transmission network
After first packet after recovering normal is sent successfully, the value of second detection unit is 1；If data receiver is being set
The signal of successful data reception bag is returned in time, then the value of the second detection unit resets to 0, continues to transmit next treat
The packet that receiving terminal receives；Data sending terminal will call preserved time tag simultaneously, and will be stored in spatial cache
Packet is sent to data receiver successively according to the sequencing of time tag, wherein by packet according to the elder generation of time tag
Order is sent to the process of data receiver successively afterwards is monitored by the first detection unit.
The data receiver of the communication interface sets data transfer monitoring modular, and data transfer monitoring modular is receiving
After packet, one can be returned and receive signal certainly, receiving signal certainly includes：The packet time label that has been received by and agree
Qualitative mark；Opposite, if data receiver does not receive corresponding data bag, or the packet received is incomplete, institute
A reception negative acknowledge character (NAK) can accordingly be returned to by stating data transfer monitoring modular, and the reception negative acknowledge character (NAK) includes：The number not received
Identified according to bag time tag and negativity；If data transfer monitoring modular does not return to any corresponding letter in stipulated time section
Number, then assert data-bag lost.
The invention has the advantages that：The inventive method timely in the case of communication network exception will must can count in real time
According to being sequentially stored in spatial cache, and can be after communication recovers normal, simultaneous transmission real time data and historical data, for most
Whole user provides reliable, complete real time data information service, drastically increase production process real time data security and
Reliability, while monitoring capacity of the administrative staff to produced on-site process is also improved, strengthen the concentration to production process data
Disposal ability and sharing capability.
Brief description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the inventive method execution flow chart.
Embodiment
The method resumed towards the suspension of real-time data base of the present invention, monitor in real time real in real-time data base for extracting
When data communication interface transmission network it is whether normal；When transmission network is abnormal, current real-time data is cached automatically
Historical data is used as into region of memory, transmits and delays after network recovery to be transmitted is normal, while transmitting current real-time data
The historical data deposited.
Wherein, the method for the caching is that current real-time data is packaged into packet according to fixed collection period, and
Increase corresponding time tag on packet, and carry out arrangement caching in chronological order.
The realization that monitors in real time is：In the data sending terminal of communication interface, data transfer detection module, the number are set
Include the first detection unit and the second detection unit according to transmission detection module, wherein, first detection unit is constantly in work
Make state, second detection unit only occurs just to be activated after abnormal and recovery is normal in transmission network.
The data receiver of the communication interface sets data transfer monitoring modular, and data transfer monitoring modular is receiving
After packet, one can be returned and receive signal certainly, receiving signal certainly includes：The packet time label that has been received by and agree
Qualitative mark；Opposite, if data receiver does not receive corresponding data bag, or the packet received is incomplete, institute
A reception negative acknowledge character (NAK) can accordingly be returned to by stating data transfer monitoring modular, and the reception negative acknowledge character (NAK) includes：The number not received
Identified according to bag time tag and negativity；If data transfer monitoring modular does not return to any corresponding letter in stipulated time section
Number, then assert data-bag lost.
As shown in figure 1, the upper body flow of the inventive method is：
Before the data sending terminal and data receiver of the communication interface establish connection, the value of the first detection unit sum is 0,
And after foundation connection and first packet are sent successfully, the value of first detection unit is 1；
Judge whether to be to receive packet in setting time section：
(1) if data receiver returns to the signal of successful data reception bag in setting time, then the first detection is single
The value of member resets to 0, continues to transmit the packet that next end to be received receives.
(2) if data receiver does not return to the signal of successful data reception bag, the first detection in setting time section
The value of unit keeps constant, and store the time tag corresponding to the current packet transmitted not successfully, while will not send
Packet is sequentially stored into spatial cache；
After transmission network recovers normal, the data sending terminal will send and be carried by what freshly harvested real time data generated
The packet of newest time tag, and call the second detection unit to be monitored；Data sending terminal will call what is preserved simultaneously
Time tag, and the packet for being stored in spatial cache is sent to data receiver successively according to the sequencing of time tag
End, wherein packet is sent to the process of data receiver by the first detection unit successively according to the sequencing of time tag
It is monitored.Wherein, the monitoring process of the second detection unit is：The value of second detection unit is 0, after transmission network recovers normal
First packet send successfully after, the value of second detection unit is 1；If data receiver returns in setting time
The signal of successful data reception bag, then the value of the second detection unit resets to 0, continues to transmit next end reception to be received
Packet.The monitoring process of first detection unit is：The value of first detection unit is 0, and is establishing connection and first number
After being sent successfully according to bag, the value of first detection unit is 1；If data receiver is returned in setting time and has been properly received
The signal of packet, then the value of the first detection unit resets to 0, continues to transmit the packet that next end to be received receives；
If data receiver does not return to the signal of successful data reception bag in setting time section, the value of the first detection unit is kept
It is constant, and the time tag corresponding to the current packet transmitted not successfully is stored, while the packet not sent is deposited successively
Enter spatial cache.
Real time data timely in the case of communication network exception can must be sequentially stored in caching sky by the inventive method
Between in, and simultaneous transmission real time data and historical data, can be provided after communication recovers normal for end user reliable, complete
Whole real time data information service, drastically increases the safety and reliability of production process real time data, while also improves
Monitoring capacities of the administrative staff to produced on-site process, strengthen and focus on ability and shared energy to production process data
Power.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us are merely exemplary, rather than for the restriction to the scope of the present invention, are familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (7)
1. a kind of method that suspension towards real-time data base resumes, it is characterised in that：Monitor in real time for extracting real time data
Whether the transmission network of the communication interface of real time data is normal in storehouse；When transmission network is abnormal, currently will count in real time automatically
Historical data is used as into region of memory according to caching, after network recovery to be transmitted is normal, is passed while transmitting current real-time data
Defeated cached historical data.
2. the method that a kind of suspension towards real-time data base according to claim 1 resumes, it is characterised in that：It is described slow
The method deposited is that current real-time data is packaged into packet according to fixed collection period, and is increased accordingly on packet
Time tag, and arrangement caching is carried out in chronological order.
3. the method that a kind of suspension towards real-time data base according to claim 1 resumes, it is characterised in that：The reality
When the realization that monitors be：In the data sending terminal of communication interface, data transfer detection module, the data transfer detection module are set
Including the first detection unit and the second detection unit, wherein, first detection unit is constantly in working condition, and described second
Detection unit only occurs just to be activated after abnormal and recovery is normal in transmission network.
4. the method that a kind of suspension towards real-time data base according to claim 3 resumes, it is characterised in that：It is described logical
Believe the data sending terminal of interface and before data receiver establishes connection, the value of the first detection unit is 0, and is establishing connection and the
After one packet is sent successfully, the value of first detection unit is 1；If data receiver returned in setting time into
The signal of work(received data packet, then the value of the first detection unit resets to 0, continues to transmit the number that next end to be received receives
According to bag；If data receiver does not return to the signal of successful data reception bag in setting time section, the first detection unit
Value keeps constant, and stores the time tag corresponding to the current packet transmitted not successfully, while the packet that will do not sent
It is sequentially stored into spatial cache.
5. the method that a kind of suspension towards real-time data base according to claim 3 or 4 resumes, it is characterised in that：When
After transmission network recovers normal, the data sending terminal will send and be marked by what freshly harvested real time data generated with the newest time
The packet of label, and call the second detection unit to be monitored, the value of the second detection unit is 0, after transmission network recovers normal
First packet send successfully after, the value of second detection unit is 1；If data receiver returns in setting time
The signal of successful data reception bag, then the value of the second detection unit resets to 0, continues to transmit next end reception to be received
Packet；Data sending terminal will call preserved time tag simultaneously, and will be stored in the packet of spatial cache according to
The sequencing of time tag is sent to data receiver successively, wherein by packet according to the sequencing of time tag successively
Send to the process of data receiver and be monitored by the first detection unit.
6. the method that a kind of suspension towards real-time data base according to claim 3 resumes, it is characterised in that：It is described logical
Believe that the data receiver of interface sets data transfer monitoring modular, data transfer monitoring modular can return after packet is received
Return one and receive signal certainly；Opposite, if data receiver does not receive corresponding data bag, or the packet received is not
Completely, the data transfer monitoring modular can accordingly return to a reception negative acknowledge character (NAK)；If data transfer monitoring modular exists
Any corresponding signal is not returned in stipulated time section, then assert data-bag lost.
7. the method that a kind of suspension towards real-time data base according to claim 6 resumes, it is characterised in that：It is described to connect
Receiving signal certainly includes：The packet time label having been received by and certainty mark；The reception negative acknowledge character (NAK) includes：Do not connect
Packet time label and the negativity mark received.
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| CN201710653712.7A CN107451268B (en) | 2017-08-03 | 2017-08-03 | Real-time database-oriented method for continuous transmission in disconnected network |
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| CN201710653712.7A CN107451268B (en) | 2017-08-03 | 2017-08-03 | Real-time database-oriented method for continuous transmission in disconnected network |
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| CN107451268B CN107451268B (en) | 2020-12-15 |
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| CN112702427A (en) * | 2020-12-23 | 2021-04-23 | 武汉湖江科技有限公司 | Industrial internet data synchronization system |
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| CN113516422A (en) * | 2020-04-09 | 2021-10-19 | 王浩锴 | A containing box for commodity circulation storage |
| CN114697267A (en) * | 2022-03-06 | 2022-07-01 | 道莅智远科技(青岛)有限公司 | Industrial control PLC real-time data communication interruption continuous transmission optimization algorithm |
| CN115102911A (en) * | 2022-07-29 | 2022-09-23 | 上海电气风电集团股份有限公司 | Data acquisition method and device, electronic equipment and readable storage medium |
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| CN113516422A (en) * | 2020-04-09 | 2021-10-19 | 王浩锴 | A containing box for commodity circulation storage |
| CN112702427A (en) * | 2020-12-23 | 2021-04-23 | 武汉湖江科技有限公司 | Industrial internet data synchronization system |
| CN112565463A (en) * | 2021-01-15 | 2021-03-26 | 江苏米塔网络科技服务有限公司 | Data breakpoint continuous transmission method |
| CN112968815A (en) * | 2021-03-11 | 2021-06-15 | 福州大学 | Method for realizing continuous transmission in broken network |
| CN113377815A (en) * | 2021-06-10 | 2021-09-10 | 西安热工研究院有限公司 | Method for continuously transmitting write snapshot breakpoint facing real-time database |
| CN113377815B (en) * | 2021-06-10 | 2023-03-14 | 西安热工研究院有限公司 | Method for continuously transmitting write snapshot breakpoint facing real-time database |
| CN114697267A (en) * | 2022-03-06 | 2022-07-01 | 道莅智远科技(青岛)有限公司 | Industrial control PLC real-time data communication interruption continuous transmission optimization algorithm |
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| CN115102911A (en) * | 2022-07-29 | 2022-09-23 | 上海电气风电集团股份有限公司 | Data acquisition method and device, electronic equipment and readable storage medium |
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