CN109218137A - The condition detection method and device of a kind of node in distributed system - Google Patents
The condition detection method and device of a kind of node in distributed system Download PDFInfo
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- CN109218137A CN109218137A CN201811216537.6A CN201811216537A CN109218137A CN 109218137 A CN109218137 A CN 109218137A CN 201811216537 A CN201811216537 A CN 201811216537A CN 109218137 A CN109218137 A CN 109218137A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/16—Threshold monitoring
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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
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- H04L67/10—Protocols in which an application is distributed across nodes in the network
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Abstract
This application discloses the condition detection method of the node in distributed system and devices.This method comprises: Step 1: sending call request to the health status interface of the second node opposite with first node subordinate relation using the first node in distributed system；Step 2: judging whether first node receives the health status information of second node in time-out time；Step 3: if the health status information of second node is not received in time-out time, then judge whether the number for sending call request to second node reaches the threshold value of request number of times: if the number that second node sends call request is not up to the threshold value of request number of times, request number of times is then added one, then returnes to step 1；If the number that second node sends call request has reached the threshold value of request number of times, it is determined that the communication link between first node and second node is already off.The above method makes the accuracy for detecting the state of the node in distributed system higher.
Description
Technical field
This application involves distributed system field, the condition detection method and dress of the node in espespecially a kind of distributed system
It sets.
Background technique
The bottleneck encountered with Moore's Law needs system (referred to as " distributed system ") ability by distributed structure/architecture
Realize mass data processing ability and expansible computing capability.In a distributed system, the state of each service node seem to
Close it is important, if host node can not accurately judge the state from node, can not coordinator node resource, it is each from node not
It can judge the state of host node, then can not re-elect host node, gently then cause data inconsistent, it is heavy then cause system that can not transport
Row.If by the way of sending ping order come the state of detection node, when network load is high (for example,
When there is temporary network failure or delay), then institute's having time that heartbeat sends and receives this process is likely larger than
Time-out time, and when network load is small, when institute's having time that heartbeat sends and receives this process is likely less than time-out
Between, therefore for scenes in fact different for network load, judge that the standard of the state of node is inconsistent, this possibility
Cause the state of erroneous judgement service node.
Summary of the invention
In order to solve the above-mentioned technical problem, this application provides a kind of condition detection methods of the node in distributed system
And device, it can more accurately judge the state of the service node in distributed system.
In order to reach the object of the invention, the embodiment of the invention provides a kind of state-detections of the node in distributed system
Method, this method include the following steps:
Step 1: using the first node in distributed system to the second node opposite with first node subordinate relation
Health status interface sends call request；Wherein, distributed system includes multiple service nodes, and first node is in multiple services
Host node among node is either opposite with the subordinate relation of host node from node among multiple service nodes；
Step 2: judging whether first node receives the health status information of second node in time-out time；
Step 3: judging if not receiving the health status information of second node in time-out time to the second section
Whether the number that point sends call request reaches the threshold value of request number of times:
If the number that second node sends call request is not up to the threshold value of request number of times, request number of times is added one,
Then return to step 1；
If the number that second node sends call request has reached the threshold value of request number of times, it is determined that first node and the
Communication link between two nodes is already off.
Further, in an alternative embodiment, the communication link between first node and second node is being determined
After already off step, this method further include:
If first node is host node and second node is to redistribute second node and first node from node
Other from the resource between node.
Further, in an alternative embodiment, the communication link between first node and second node is being determined
After already off step, this method further include:
If first node is from node and second node is host node, other for whether determining second node inquired
It is already off from the communication link of node and second node: if it is determined that other of second node are from the logical of node and second node
It is already off to interrogate link, then in all third nodes that elect from node of second node as other than third node
All host nodes from node of second node.
Further, in an alternative embodiment, before step 1, method further include: when detecting distribution
When system is added to fourth node, the health status interface of fourth node is set, the health status interface of fourth node is used
In the call request for receiving service node opposite with the subordinate relation of fourth node in a distributed system.
Further, in an alternative embodiment, before step 1, method further include: setting time-out time with
And the threshold value of request number of times.
On the other hand, the embodiment of the invention provides a kind of condition checkout gear of the node in distributed system, the dresses
It sets including request sending module, condition judgment module, number judgment module, number accumulator module and state determining module；Its
In,
Request sending module is used for: using the first node in distributed system to opposite with first node subordinate relation
The health status interface of second node sends call request；Wherein, distributed system includes multiple service nodes, and first node is
Host node among multiple service nodes is either opposite with the subordinate relation of host node among multiple service nodes
From node；
Condition judgment module is used for: judging whether first node receives the health status of second node in time-out time
Information；
Number judgment module is used for: if not receiving the health status information of second node in time-out time, being sentenced
Break and whether reaches the threshold value of request number of times to the number that second node sends call request；
Number accumulator module is used for: if the number that second node sends call request is not up to the threshold value of request number of times,
Request number of times is then added one, then returnes to step 1；
State determining module is used for: if the number that second node sends call request has reached the threshold value of request number of times,
Then determine that the communication link between first node and second node is already off.
Further, in an alternative embodiment, which further includes from node processing module；
It is used for from node processing module: determining the communication link between first node and second node in state determining module
After already off, if first node is host node and second node is to redistribute second node and from node
Other of one node are from the resource between node.
Further, in an alternative embodiment, which further includes host node processing module；
Host node processing module is used for: determining the communication link between first node and second node in state determining module
After already off, if first node is from node and second node is host node, inquire and whether determine second node
Other are already off from the communication link of node and second node: if it is determined that other of second node are from node and the second section
The communication link of point is already off, then is used as in all third nodes that elect from node of second node in addition to third node
All host nodes from node of second node in addition.
Further, in an alternative embodiment, device further include: newly add node processing module；
Newly add node processing module to be used for: before request sending module sends call request using first node, working as inspection
When measuring distributed system and be added to fourth node, the health status interface of fourth node, the health of fourth node are set
State interface is used to receive the call request of service node opposite with the subordinate relation of fourth node in a distributed system.
Further, in an alternative embodiment, which further includes time and request number of times setup module；
Time and request number of times setup module are used for: request sending module using first node send call request it
Before, the threshold value of time-out time and request number of times is set.
The beneficial effect of the embodiment of the present invention is that above scheme passes through the time that will receive health status information and surpasses
When the time be compared, and the request number of times for sending call request is compared with the threshold value of request number of times, can be to avoid
Since the variation of network load is so that judge that the standard of the state of node is inconsistent, and then the health status of erroneous judgement node is asked
Topic, copes with temporary network failure and delay, so that the accuracy of the state of the node in detection distributed system is higher.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the flow chart of the condition detection method of the node in distributed system provided in an embodiment of the present invention；
Fig. 2 is the block diagram of the condition checkout gear of the node in distributed system provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
The bottleneck encountered with Moore's Law needs system (referred to as " distributed system ") ability by distributed structure/architecture
Realize mass data processing ability and expansible computing capability.Distributed system includes multiple service node, including master
The slave node of node and this host node.If by the way of sending ping order come the state of detection node,
When network load is high, then institute's having time that heartbeat sends and receives this process is likely larger than time-out time, and in net
When network load is small, institute's having time that heartbeat sends and receives this process is likely less than time-out time, therefore in fact right
For the different scene of network load, judge the state of node standard be it is inconsistent, this may cause erroneous judgement node
State.
In view of the above-mentioned problems, on the one hand, the embodiment of the invention provides a kind of inspections of the state of the node in distributed system
Survey method, as shown in Figure 1, the method comprising the steps of S101-S109.
Step S101, using the first node in distributed system to the second node opposite with first node subordinate relation
Health status interface send call request；Wherein, distributed system includes multiple service nodes, and first node is in multiple clothes
Host node among business node is either opposite with the subordinate relation of host node from node among multiple service nodes.
Wherein, host node is the leader node elected in electoral procedure, has distribution, scheduling resource and task
Permission, and be ordinary node from node, generally receive the resource and task of host node distribution.It is provided in the embodiment of the present invention
Method in, first node and second node are all the service nodes of distributed system, and first node and second node
Subordinate relation is opposite, that is to say, that if first node is host node, second node is the slave node of first node；If
Second node is host node, then first node is the slave node of second node.It can be in advance distributed system before step S101
Health status interface is respectively set in each service node of system, and each health status interface is for receiving for this healthy shape
The call request of the health status information of the targeted service node of state interface.And in step s101, first node can be with
Call request is sent to the health status interface of second node, to call the health status information of second node, and according to being
The no health status information that second node can be got in time-out time, to judge the health status of second node.Also,
The health status information of second node can be the heartbeat signal of second node as mentioned herein.
Step S103, judges whether first node receives the health status information of second node in time-out time.
In step s 103, above-mentioned deterministic process is executed, in order to judge the health status of second node.If super
When the time inscribed health status information for receiving second node, then judge that the communication link between first node and second node is
Normally, the health status of second node is normal, if first node is host node, second node is first node
From node, then first node can distribute resource and task to second node；If first node is from node second node
It is the host node of first node, then first node can receive the resource and task of second node distribution.
Step S105 judges if not receiving the health status information of second node in time-out time to second
Whether the number that node sends call request reaches the threshold value of request number of times.
In step s105, if not receiving the health status information of second node in time-out time, this method is simultaneously
It will not judge that the link between second node and first node is already off immediately, but can first determine whether to send to second node
Whether the number of call request reaches the threshold value of request number of times, to avoid appear in network load it is high when due to call request
The institute's having time for sending and receiving health status information this process is likely larger than time-out time and is mistaken for second node
The case where being disconnected with first node.
Step S107 will request if the number that second node sends call request is not up to the threshold value of request number of times
Number adds one, then returnes to step S101.
In step s 107, the number for sending call request for second node is not up to the feelings of the threshold value of request number of times
The number of call request can be added one first by condition, this method, then still can use again first node back to step S101
Call request is sent to second node, to determine whether the link between first node and second node is already off again.
Step S109, if having reached the threshold value of request number of times, it is determined that the communication between first node and second node
Link is already off.
In step s 107, the number for sending call request for second node has reached the feelings of the threshold value of request number of times
Condition, first node repeatedly sends call request to second node in a period of time and is but not received by second node at this time
Health status information, it can be considered that communication link between first node and second node is really already off.
The beneficial effect of the embodiment of the present invention is that above scheme passes through the time that will receive health status information and surpasses
When the time be compared, and the request number of times for sending call request is compared with the threshold value of request number of times, can be to avoid
Since the variation of network load is so that judge that the standard of the state of node is inconsistent, and then the health status of erroneous judgement node is asked
Topic, copes with temporary network failure and delay, so that the accuracy of the state of the node in detection distributed system is higher.
Further, in an alternative embodiment, after step S109, this method further include:
If first node is host node and second node is to redistribute second node and first node from node
Other from the resource between node.
Further, in an alternative embodiment, after step S109, this method further include:
If first node is from node and second node is host node, other for whether determining second node inquired
It is already off from the communication link of node and second node: if it is determined that other of second node are from the logical of node and second node
It is already off to interrogate link, then in all third nodes that elect from node of second node as other than third node
All host nodes from node of second node.
Further, in an alternative embodiment, before step S101, this method further include: when detecting point
When cloth system is added to fourth node, the health status interface of fourth node is set, the health status of fourth node connects
Mouth is for receiving the call request of service node opposite with the subordinate relation of fourth node in a distributed system.
Further, in an alternative embodiment, before step S101, this method further include: when setting time-out
Between and request number of times threshold value.
Wherein, the threshold value of above-mentioned time-out time and request number of times can be for entire distributed system and be configured
, it is also possible to be separately provided for each of distributed system service node.
On the other hand, the embodiment of the invention provides a kind of condition checkout gears of the node in distributed system, such as Fig. 2
Shown, which includes request sending module 201, condition judgment module 203, number judgment module 205, number accumulator module
207 and state determining module 209.
Request sending module 201 is used for: using the first node in distributed system to first node subordinate relation phase
The health status interface of anti-second node sends call request；Wherein, distributed system includes multiple service nodes, first segment
Point is subordinate relation phase with host node of the host node either among multiple service nodes among multiple service nodes
Anti- slave node.
Condition judgment module 203 is used for: judging whether first node receives the health of second node in time-out time
Status information
Number judgment module 205 is used for: if the health status information of second node is not received in time-out time,
Judge whether the number for sending call request to second node reaches the threshold value of request number of times.
Number accumulator module 207 is used for: if the number that second node sends call request is not up to the threshold of request number of times
Value, then add one for request number of times, then return to step 1.
State determining module 209 is used for: if the number that second node sends call request has reached the threshold of request number of times
Value, it is determined that the communication link between first node and second node is already off.
The beneficial effect of the embodiment of the present invention is that above scheme passes through the time that will receive health status information and surpasses
When the time be compared, and the request number of times for sending call request is compared with the threshold value of request number of times, can be to avoid
Since the variation of network load is so that judge that the standard of the state of node is inconsistent, and then the health status of erroneous judgement node is asked
Topic, copes with temporary network failure and delay, so that the accuracy of the state of the node in detection distributed system is higher.
Further, in an alternative embodiment, which further includes from node processing module.
It is used for from node processing module: determining the communication between first node and second node in state determining module 209
After link is already off, if first node is host node and second node is to redistribute second node from node
With first node other from the resource between node.
Further, in an alternative embodiment, which further includes host node processing module.
Host node processing module is used for: determining the communication between first node and second node in state determining module 209
After link is already off, if first node is from node and second node is host node, inquires and whether determine second
Other of node are already off from the communication link of node and second node: if it is determined that other of second node are from node and
The communication link of two nodes is already off, then is used as in all third nodes that elect from node of second node in addition to third
All host nodes from node of second node other than node.
Further, in an alternative embodiment, device further include: newly add node processing module.
Newly add node processing module to be used for: before request sending module 201 sends call request using first node, when
When detecting that distributed system is added to fourth node, the health status interface of fourth node is set, fourth node is good for
Health state interface is used to receive the call request of service node opposite with the subordinate relation of fourth node in a distributed system.
Further, in an alternative embodiment, which further includes time and request number of times setup module.
Time and request number of times setup module are used for: sending call request using first node in request sending module 201
Before, the threshold value of time-out time and request number of times is set.
Although disclosed herein embodiment it is as above, above-mentioned content only for ease of understanding the present invention and use
Embodiment is not intended to limit the 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 (10)
1. a kind of condition detection method of the node in distributed system, which is characterized in that the method includes the following steps:
Step 1: using the first node in distributed system to the second node opposite with the first node subordinate relation
Health status interface sends call request；Wherein, the distributed system includes multiple service nodes, the first node be
Subordinate relation with host node of the host node either among the multiple service node among the multiple service node
Opposite slave node；
Step 2: judging whether the first node receives the health status information of the second node in time-out time；
Step 3: judging if not receiving the health status information of the second node in the time-out time to institute
Whether the number for stating second node transmission call request reaches the threshold value of request number of times:
If the number that the second node sends call request is not up to the threshold value of request number of times, request number of times is added one,
Then return to step 1；
If the number that the second node sends call request has reached the threshold value of request number of times, it is determined that the first node
Communication link between the second node is already off.
2. the method according to claim 1, wherein determining between the first node and the second node
The already off step of communication link after, the method also includes:
If the first node be host node and the second node be from node, redistribute the second node with
Other of the first node are from the resource between node.
3. the method according to claim 1, wherein determining between the first node and the second node
The already off step of communication link after, the method also includes:
If the first node is from node and the second node is host node, inquires and whether determine second section
Point other are already off from the communication link of node and the second node: if it is determined that other of the second node are from section
Point is already off with the communication link of the second node, then third section is elected from node in all of the second node
All host nodes from node of the point as the second node other than the third node.
4. the method according to claim 1, wherein before step 1, the method also includes: when detecting
When the distributed system is added to fourth node, the health status interface of the fourth node is set, described Section four
The health status interface of point is for receiving opposite with the subordinate relation of fourth node service in the distributed system
The call request of node.
5. the method according to claim 1, wherein before step 1, the method also includes: described in setting
The threshold value of time-out time and the request number of times.
6. a kind of condition checkout gear of the node in distributed system, which is characterized in that described device includes that request sends mould
Block, condition judgment module, number judgment module, number accumulator module and state determining module；Wherein,
The request sending module is used for: using the first node in distributed system to the first node subordinate relation phase
The health status interface of anti-second node sends call request；Wherein, the distributed system includes multiple service nodes, institute
State first node be host node among the multiple service node either among the multiple service node with master
The opposite slave node of the subordinate relation of node；
The condition judgment module is used for: judging whether the first node receives the second node in time-out time
Health status information；
The number judgment module is used for: if not receiving the health status letter of the second node in the time-out time
Breath, then judge whether the number for sending call request to the second node reaches the threshold value of request number of times；
The number accumulator module is used for: if the number that the second node sends call request is not up to the threshold of request number of times
Value, then add one for request number of times, then return to step 1；
The state determining module is used for: if the number that the second node sends call request has reached the threshold of request number of times
Value, it is determined that the communication link between the first node and the second node is already off.
7. device according to claim 6, which is characterized in that described device further includes from node processing module；
It is described to be used for from node processing module: the state determining module determine the first node and the second node it
Between communication link it is already off after, if the first node be host node and the second node be from node,
Redistribute the second node and the first node other from the resource between node.
8. device according to claim 6, which is characterized in that described device further includes host node processing module；
The host node processing module is used for: the state determining module determine the first node and the second node it
Between communication link it is already off after, if the first node is from node and the second node is host node,
Inquiry whether determine the second node other are already off from the communication link of node and the second node: if it is determined that
Other of the second node are already off from the communication link of node and the second node, then in the institute of the second node
Have from third node is elected in node as all from node of the second node other than the third node
Host node.
9. device according to claim 6, which is characterized in that described device further include: newly add node processing module；
It is described newly to add node processing module and be used for: the request sending module using the first node send call request it
Before, when detecting that the distributed system is added to fourth node, the health status interface of the fourth node is set,
The health status interface of the fourth node is used to receive the subordinate relation in the distributed system with the fourth node
The call request of opposite service node.
10. device according to claim 6, which is characterized in that described device further includes time and request number of times setting mould
Block；
The time and request number of times setup module are used for: being sent and called using the first node in the request sending module
Before request, the threshold value of the time-out time and the request number of times is set.
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