CN108306703A - A kind of method, apparatus and equipment of redundancy monitoring network time synchronization - Google Patents
A kind of method, apparatus and equipment of redundancy monitoring network time synchronization Download PDFInfo
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- CN108306703A CN108306703A CN201810088589.3A CN201810088589A CN108306703A CN 108306703 A CN108306703 A CN 108306703A CN 201810088589 A CN201810088589 A CN 201810088589A CN 108306703 A CN108306703 A CN 108306703A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
- G06F11/3006—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system is distributed, e.g. networked systems, clusters, multiprocessor systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3055—Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3065—Monitoring arrangements determined by the means or processing involved in reporting the monitored data
Abstract
The invention discloses method, apparatus, equipment and computer readable storage mediums that a kind of redundancy monitors network time synchronization, including：Judge whether the first monitoring network is in normal operating conditions；When the first monitoring network is in normal operating conditions and the second monitoring network is in standby, to first monitoring network tranmitting data register source arrange parameter, in order to which itself timing parameter is arranged according to the clock source arrange parameter in the first monitoring network；Preset communication link between network and the second monitoring network is monitored by described first, the clock source arrange parameter that network obtains is monitored by described first and is sent to the second monitoring network, in order to which itself timing parameter is arranged according to the clock source arrange parameter in the second monitoring network.There is provided method, apparatus, equipment and computer readable storage medium are provided using this hair, can correctly ensure the accuracy of whole machine cabinet server monitoring network time in real time.
Description
Technical field
The present invention relates to field of computer technology, and method, the dress of network time synchronization are monitored more particularly to a kind of redundancy
It sets, equipment and computer readable storage medium.
Background technology
Whole machine cabinet server uses centrally connected power supply, concentrates heat dissipation, is managed collectively calculate node, realizes computing resource, storage
The design of resource module.Raising with user to server performance demand, user need to server computing node and
Complete machine is monitored in real time.Whole machine cabinet server has very big in the integrated and management to node compared with traditional server
Advantage, and it is also more and more extensive in practical application.
In traditional server, the time is generally held in the single clock source of monitoring module, and by clock source electricity
Road controls and corrects.Server in long-term use, can inevitably encounter time wrong situation.In the situation that the time is wrong
Under, server monitoring management module is in real time monitored the equipment such as interchanger, fan, power supply and node, and is breaking down
The information of Shi Jinhang alarms will generate error.
In summary as can be seen that how correctly to ensure that the accuracy of whole machine cabinet server monitoring network time is in real time
There is problem to be solved at present.
Invention content
The method, apparatus of network time synchronization, equipment are monitored the object of the present invention is to provide a kind of redundancy and readable are deposited
Storage media has solved the accuracy that cannot ensure server monitoring network time in real time in the prior art.
In order to solve the above technical problems, the present invention provides a kind of method of redundancy monitoring network time synchronization, including：Judge
Whether the first monitoring network is in normal operating conditions；When the first monitoring network is in normal operating conditions and the second monitoring
When network is in standby, to first monitoring network tranmitting data register source arrange parameter, in order to first monitoring network
Itself timing parameter is arranged according to the clock source arrange parameter in network；Network and second monitoring network are monitored by described first
Preset communication link between network monitors the clock source arrange parameter that network obtains by described first and is sent to second monitoring
Network, in order to which itself timing parameter is arranged according to the clock source arrange parameter in the second monitoring network.
Preferably, it is described judge the first monitoring network whether in normal operating conditions include：
The second monitoring network sends instruction to the first monitoring network in real time, and detection the first monitoring network is
The no instruction sent in response to the second monitoring network simultaneously returns to reply message；
Continue to send instruction to the first monitoring network in the second monitoring network, and records first monitoring network
Network does not return to the number of reply message；
The size that network does not return to the number and predetermined threshold value of reply message is monitored by comparing described first, described in judgement
Whether the first monitoring network is in normal operating conditions.
Preferably, it is described judge the first monitoring network whether after the normal operating conditions further include：When first prison
When control network is active in the state and the second monitoring network that can not work normally, the second monitoring network
According to the clock source arrange parameter got, itself timing parameter is set；
Detect in real time it is described first monitoring network whether restore normal operating conditions, when it is described first monitoring network recovery just
When normal working condition, the clock source arrange parameter is synchronized to the first monitoring network by the second monitoring network, described
Second monitoring network is again at standby mode.
Preferably, preset communication link is logical for serial ports between the first monitoring network and the second monitoring network
Letter.
Preferably, the clock source arrange parameter for described first being monitored network acquisition is sent to second monitoring network
Network, in order to which the second monitoring network is arranged itself timing parameter according to the clock source arrange parameter and includes：
When the clock source arrange parameter is sent to the second monitoring network by the first monitoring network, described the
The real-time clock that the clock source parameter synchronization is monitored network by two monitoring networks to described second；
Every the clock source ginseng that prefixed time interval, the second monitoring network are got according to the first monitoring network
The clock source arrange parameter of the real-time clock of the primary second monitoring network of number update.
The present invention also provides the devices that a kind of redundancy monitors network time synchronization, including：
Judgment module：For judging whether the first monitoring network is in normal operating conditions；
First setup module：For working as, the first monitoring network is in normal operating conditions and the second monitoring network is in
When standby mode, to first monitoring network tranmitting data register source arrange parameter, in order to which the first monitoring network is according to institute
It states clock source arrange parameter and itself timing parameter is set；
Second setup module：For monitoring preset communication between network and the second monitoring network by described first
Link monitors the clock source arrange parameter that network obtains by described first and is sent to the second monitoring network, in order to described
Itself timing parameter is arranged according to the clock source arrange parameter in second monitoring network.
Preferably, the judgment module is specifically used for：The second monitoring network is in real time to the first monitoring network hair
Instruction is sent, the instruction whether detection the first monitoring network monitors network transmission in response to described second simultaneously returns to answer letter
Breath；Continue to send instruction to the first monitoring network in the second monitoring network, and records the first monitoring network not
Return to the number of reply message；By comparing it is described first monitor network do not return reply message number and predetermined threshold value it is big
It is small, judge whether the first monitoring network is in normal operating conditions.
Preferably, described device further includes acquisition module, for work as it is described first monitoring network be in can not work normally
State and the second monitoring network when being active, the second monitoring network is according to the clock source setting got
Parameter setting itself timing parameter；
Detect in real time it is described first monitoring network whether restore normal operating conditions, when it is described first monitoring network recovery just
When normal working condition, the clock source arrange parameter is synchronized to the first monitoring network by the second monitoring network, described
Second monitoring network is again at standby mode.
The present invention also provides the equipment that a kind of redundancy monitors network time synchronization, including：
Memory, for storing computer program；Processor realizes above-mentioned one kind when for executing the computer program
Redundancy monitors the step of method of network time synchronization.
The present invention also provides a kind of computer readable storage medium, meter is stored on the computer readable storage medium
Calculation machine program, the computer program realize a kind of method of above-mentioned redundancy monitoring network time synchronization when being executed by processor
Step.
Method, apparatus, equipment and the computer-readable storage of redundancy monitoring network time synchronization provided by the present invention
Medium, including first monitoring network and second monitoring network, and between described first monitor network with it is described second monitor network it
Between there are communication link, the first monitoring network, which with described second monitors network and passes through the communication link, realizes temporal information
Interaction.When the first monitoring network is in the state of normal work, the second monitoring network is in standby state,
The first monitoring network obtains the clock source arrange parameter of user setting, and itself is arranged according to the clock source arrange parameter
Timing parameter；And first monitoring network by the clock source arrange parameter received be sent to it is described second monitoring network, in order to
Itself timing parameter is arranged according to the clock source arrange parameter in the second monitoring network.The second monitoring network can be
The first monitoring network replaces the first monitoring network to work when can not be in the state of normal work.Institute of the present invention
The method of the redundancy monitoring network time synchronization of offer, quickly and accurately manages the time system of whole machine cabinet server, correctly
The time accuracy of calculate node is ensured in real time；When failure alerts, the accurate unification of time also helps arrange faster
Interrogate topic.
Description of the drawings
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing is briefly described needed in technology description, it should be apparent that, the accompanying drawings in the following description is only this hair
Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow of the first specific embodiment of the method that redundancy provided by the present invention monitors network time synchronization
Figure；
Fig. 2 is a kind of structural schematic diagram of whole machine cabinet server；
Fig. 3 is the flow of second of specific embodiment of the method that redundancy provided by the present invention monitors network time synchronization
Figure；
Fig. 4 is the structure diagram for the device that a kind of redundancy provided in an embodiment of the present invention monitors network time synchronization.
Specific implementation mode
Core of the invention is to provide a kind of method, apparatus, equipment and the computer of redundancy monitoring network time synchronization
Readable storage medium storing program for executing correctly ensures the accuracy of monitoring network time in real time.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the first the specific reality for the method that redundancy provided by the present invention monitors network time synchronization
Apply the flow chart of example；Concrete operation step is as follows：
Step S101：Judge whether the first monitoring network is in normal operating conditions；
In the present embodiment, the calculate node of whole machine cabinet server includes two monitoring networks：First monitoring network and the
Two monitoring networks described first can will monitor network as main monitoring network, using the second monitoring network as from monitoring
Network.
Monitor whether the first monitoring network described in network real-time judge is in normal working condition using described second.Institute
State the second monitoring network in real time to it is described first monitoring network send instruction, and detect it is described first monitoring network whether in response to
The instruction of the second monitoring network transmission simultaneously returns to reply message；Continue to first monitoring in the second monitoring network
Network sends instruction, and records the number that the first monitoring network does not return to reply message；It is monitored by comparing described first
Whether network does not return to the number of reply message and the size of predetermined threshold value, judge the first monitoring network in normal work
State.Such as：The second monitoring network persistently sends instruction to the first monitoring network, and the first monitoring network connects
When the continuous number for not returning to reply message is less than three, then judge that the first monitoring network is in normal working condition.
Step S102：When it is described first monitoring network be in normal operating conditions and second monitor network be in standby
When, to first monitoring network tranmitting data register source arrange parameter, in order to which the first monitoring network is according to the clock source
Itself timing parameter is arranged in arrange parameter；
Step S103：Preset communication link between network and the second monitoring network is monitored by described first, it will
The clock source arrange parameter that the first monitoring network obtains is sent to the second monitoring network, in order to second monitoring
Itself timing parameter is arranged according to the clock source arrange parameter in network.
Being established between the first monitoring network and the second monitoring network has communication link, utilizes the communication link
The first monitoring network monitors the interaction that temporal information may be implemented in network with described second.The first monitoring network and institute
It can be serial ports to state the communication link between the second communication network, or network etc..
In the case that the second monitoring network is in standby, the first monitoring network is arranged according to the clock source
After the clock of parameter setting itself, the clock source arrange parameter is issued into the second monitoring network, second monitoring network
After network receives the clock source arrange parameter, clock source is synchronized to the reality of the second monitoring network by the second monitoring network
In Shi Shizhong (Real-Time Clock RTC)；Every prefixed time interval, such as：Ten minutes, half an hour etc., second prison
Control network according to the primary second monitoring network of clock source parameter update that the first monitoring network is got it is real-time when
The clock source arrange parameter of clock.
As shown in Fig. 2, general whole machine cabinet server has a large amount of different types of calculate nodes, such as：Half-breadth calculates section
Point and overall with calculate node, the arrangement mode of calculate node are not limited to the arrangement mode in Fig. 2.The first monitoring network and institute
It states the second monitoring network and monitors all calculate nodes that network carrys out monitoring management whole machine cabinet server respectively as principal and subordinate, in main prison
After control network obtains the correct time, the correct temporal information got is synchronized to by modes such as serial ports, networks
From monitoring network.
The method for monitoring network time synchronization using the redundancy that the present embodiment is provided, correctly ensures whole machine cabinet in real time
The accuracy of server monitoring network time；The each calculate node unified management of whole machine cabinet server, further increases calculating
The time accuracy of node, when calculate node, which breaks down, to be alerted, the accurate of time uniformly also contributes to exclude to ask faster
Topic.
Referring to FIG. 3, Fig. 3 is second of specific reality of the method that redundancy provided by the present invention monitors network time synchronization
Apply the flow chart of example；On the basis of the above embodiments, described when the first monitoring network is in abnormal operating state
Second monitoring network replaces the first monitoring network to work on；The concrete operation step of the present embodiment is as follows：
Step S301：Judge whether the first monitoring network is in normal operating conditions；
Step S302：When the first monitoring network is in normal operating conditions, the first monitoring network receives pre-
If clock source arrange parameter, and by the clock source arrange parameter be sent to it is described second monitoring network；
Step S303：The clock source arrange parameter is synchronized in the real-time clock of itself by the second monitoring network,
Every preset time interval, the second monitoring network obtains a clock source setting ginseng from the first monitoring network again
Number；
Step S304：When the first monitoring network is at the state that can not work normally and the second monitoring network
When state of activation, itself timing parameter is arranged according to the clock source arrange parameter got in the second monitoring network；
In the present embodiment, the second monitoring network sends instruction to the first monitoring network in real time, monitors institute
State the first monitoring network whether return information；Therefore be possible to just can not be just when in original state for the first monitoring network
Often work, at this point, the second monitoring network replaces described first to monitor network obtains clock source arrange parameter from system.Institute
It states the first monitoring network and is also possible to occur failure after a period of time that worked, the second monitoring network is real-time at this time
There is the clock source arrange parameter for monitoring Network Synchronization by described first in clock, so as to replace described first to monitor network
Work.
Step S305：Detect whether the first monitoring network restores normal operating conditions in real time；
Step S306：When the first monitoring network recovery normal operating conditions, described second monitors network profit by institute
It states clock source arrange parameter and is synchronized to the first monitoring network, the second monitoring network is again at standby mode.
In the method that the redundancy that the present embodiment is provided monitors network time synchronization, the first monitoring network has been pre-established
With second monitoring network between communication link, such as：Serial ports, network etc., the first monitoring network and second monitoring network
Network can realize the interaction of temporal information by the communication link.In the case that the second monitoring network is in standby,
After the first monitoring network settings clock source, clock source arrange parameter is issued into the second monitoring network；Second prison
It controls during setting is arranged to inherent parameters after network receives, then, clock source is re-synchronised to described the by the second monitoring network
In the RTC of two monitoring networks, and the periodically primary first monitoring network of detection (such as every every 10 minutes or 20 minutes)
Clock source, and by updated clock source be synchronized to it is described second monitoring network.If the first monitoring network can not work,
In the case that the second monitoring network is in activation, the second monitoring network is then according to above-mentioned configuration parameter and the side of synchronization
Formula is synchronized into row clock.After the first monitoring network recovery, the second monitoring network described in the first monitoring Network Synchronization
The clock source of network, the second monitoring network are again at standby mode, and the periodic synchronization time is in case reuse.
Referring to FIG. 4, Fig. 4 is the structure for the device that a kind of redundancy provided in an embodiment of the present invention monitors network time synchronization
Block diagram；Specific device may include：
Judgment module 100：For judging whether the first monitoring network is in normal operating conditions；
First setup module 200：It is in normal operating conditions and the second monitoring network for working as the first monitoring network
When being in standby, to first monitoring network tranmitting data register source arrange parameter, in order to the first monitoring network root
According to the clock source arrange parameter, itself timing parameter is set；
Second setup module 300：It is preset between network and the second monitoring network for being monitored by described first
Communication link monitors the clock source arrange parameter that network obtains by described first and is sent to the second monitoring network, in order to
Itself timing parameter is arranged according to the clock source arrange parameter in the second monitoring network.
The device of the redundancy monitoring network time synchronization of the present embodiment is same for realizing redundancy above-mentioned monitoring network time
The method of step, therefore the visible redundancy monitoring network hereinbefore of specific implementation mode in the device of redundancy monitoring network time synchronization
The embodiment part of the method for network time synchronization, for example, judgment module 100, the first setup module 200, the second setup module
300, it is respectively used to step S101, S102 and S103 in the method for realizing above-mentioned redundancy monitoring network time synchronization, so, tool
Body embodiment is referred to the description of corresponding various pieces embodiment, and details are not described herein.
The specific embodiment of the invention additionally provides a kind of equipment of redundancy monitoring network time synchronization, including：Memory is used
In storage computer program；Processor realizes a kind of above-mentioned redundancy monitoring network time when for executing the computer program
The step of synchronous method.
The specific embodiment of the invention additionally provides a kind of computer readable storage medium, the computer readable storage medium
On be stored with computer program, the computer program realizes that a kind of above-mentioned redundancy monitoring network time is same when being executed by processor
The step of method of step.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, just to refer each other for same or similar part between each embodiment.For being filled disclosed in embodiment
For setting, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is referring to method part
Explanation.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Method, apparatus, equipment and the computer for monitoring network time synchronization to redundancy provided by the present invention above can
Storage medium is read to be described in detail.Specific case used herein explains the principle of the present invention and embodiment
It states, the explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that for this skill
For the those of ordinary skill in art field, without departing from the principle of the present invention, several change can also be carried out to the present invention
Into and modification, these improvement and modification also fall within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of method of redundancy monitoring network time synchronization, which is characterized in that including：
Judge whether the first monitoring network is in normal operating conditions；
When the first monitoring network is in normal operating conditions and the second monitoring network is in standby, to described first
Network tranmitting data register source arrange parameter is monitored, in order to which the first monitoring network is arranged certainly according to the clock source arrange parameter
Body timing parameter；
Preset communication link between network and the second monitoring network is monitored by described first, by first monitoring network
Network obtain clock source arrange parameter be sent to it is described second monitoring network, in order to it is described second monitoring network according to it is described when
Itself timing parameter is arranged in clock source arrange parameter.
2. the method as described in claim 1, which is characterized in that described to judge the first monitoring network whether in normal work shape
State includes：
The second monitoring network sends instruction to the first monitoring network in real time, and whether detection the first monitoring network rings
The instruction of second monitoring network transmission described in Ying Yu simultaneously returns to reply message；
Continue to send instruction to the first monitoring network in the second monitoring network, and records the first monitoring network not
Return to the number of reply message；
The size that network does not return to the number and predetermined threshold value of reply message is monitored by comparing described first, judges described first
Monitor whether network is in normal operating conditions.
3. method as claimed in claim 2, which is characterized in that described to judge the first monitoring network whether in normal work shape
Further include after state：
When the first monitoring network is in the state that can not work normally and the second monitoring network is active,
Itself timing parameter is arranged according to the clock source arrange parameter got in the second monitoring network；
Detect whether the first monitoring network restores normal operating conditions in real time, when the first monitoring normal work of network recovery
When making state, it is described second monitoring network by the clock source arrange parameter be synchronized to it is described first monitoring network, described second
Monitoring network is again at standby mode.
4. the method as described in claim 1, which is characterized in that between the first monitoring network and the second monitoring network
Preset communication link is serial communication.
5. method as claimed in claim 4, which is characterized in that described to monitor the clock source setting that network obtains by described first
Parameter is sent to the second monitoring network, in order to which the second monitoring network is arranged certainly according to the clock source arrange parameter
Body timing parameter includes：
When the clock source arrange parameter is sent to the second monitoring network by the first monitoring network, second prison
Control real-time clock of the network by the clock source parameter synchronization to the second monitoring network；
Every prefixed time interval, the clock source parameter that the second monitoring network is got according to the first monitoring network is more
The clock source arrange parameter of the real-time clock of the new primary second monitoring network.
6. a kind of device of redundancy monitoring network time synchronization, which is characterized in that including：
Judgment module：For judging whether the first monitoring network is in normal operating conditions；
First setup module：For working as, the first monitoring network is in normal operating conditions and the second monitoring network is in standby
When state, to first monitoring network tranmitting data register source arrange parameter, in order to the first monitoring network according to it is described when
Itself timing parameter is arranged in clock source arrange parameter；
Second setup module：For monitoring preset communication chain between network and the second monitoring network by described first
Road monitors the clock source arrange parameter that network obtains by described first and is sent to the second monitoring network, in order to described the
Itself timing parameter is arranged according to the clock source arrange parameter in two monitoring networks.
7. device as claimed in claim 6, which is characterized in that the judgment module is specifically used for：
The second monitoring network sends instruction to the first monitoring network in real time, and whether detection the first monitoring network rings
The instruction of second monitoring network transmission described in Ying Yu simultaneously returns to reply message；
Continue to send instruction to the first monitoring network in the second monitoring network, and records the first monitoring network not
Return to the number of reply message；
The size that network does not return to the number and predetermined threshold value of reply message is monitored by comparing described first, judges described first
Monitor whether network is in normal operating conditions.
8. device as claimed in claim 6, which is characterized in that further include acquisition module, for when the first monitoring network
When being active in the state that can not work normally and the second monitoring network, the second monitoring network is according to obtaining
Itself timing parameter is arranged in the clock source arrange parameter got；
Detect whether the first monitoring network restores normal operating conditions in real time, when the first monitoring normal work of network recovery
When making state, it is described second monitoring network by the clock source arrange parameter be synchronized to it is described first monitoring network, described second
Monitoring network is again at standby mode.
9. a kind of equipment of redundancy monitoring network time synchronization, which is characterized in that including：
Memory, for storing computer program；
Processor realizes a kind of redundancy monitoring network as described in any one of claim 1 to 5 when for executing the computer program
The step of method of network time synchronization.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes a kind of redundancy monitoring network as described in any one of claim 1 to 5 when the computer program is executed by processor
The step of method of time synchronization.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039695A (en) * | 2021-12-24 | 2022-02-11 | 浙江中控技术股份有限公司 | Time synchronization method of redundant network, redundant network system and equipment |
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| CN108306703B (en) | 2019-10-18 |
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