CN102123052B - Method and system for estimating service system availability - Google Patents
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Abstract
The invention provides a method and system for estimating service system availability. The method comprises the following steps: monitoring network element (NE) fault events in a service system, and acquiring the health scores of the NEs in accordance with preset rules, wherein each NE comprises nodes and links; acquiring the weights of the nodes in accordance with the times of the nodes which appear in service system links; acquiring the weights of the links in accordance with the nodes related to the links; and estimating the service system availability in accordance with the health scores of the NEs and the weights of the NEs based on a preset algorithm. The method and system for estimating the service system availability is used to realize the effective and accurate estimation of the service system availability.
Description
Technical field
The present invention relates to communication technical field, relate in particular to operation system usability evaluation method and system.
Background technology
Along with the anti-exhibition of information technology, the operation system that makes up based on computer software technology is more and more higher in the operating importance of social economy, particularly in industries such as finance, communication, medical treatment and government affairs.The operation system fault of bank for example, the most basic financial business such as savings and loan can't launch; The stock exchange transaction system failure, the stock that every day is tens billion of and fund transaction can't be carried out; The medical profession system failure, the doctor can't consult patient's historical case and check data, even can not prescribe.The stable operation of operation system and lasting available, it is indispensable carrying out smoothly miscellaneous service for every profession and trade, it is very important therefore can correctly assessing the availability of operation system.
Fig. 1 is the operation system network topological diagram.As shown in Figure 1, this operation system comprises counter terminal, access switch, core switch, server area access switch and is used for providing the business system server of business service.When assessing the availability of operation system shown in Figure 1, in the prior art normally respectively to consisting of a plurality of nodes of operation system, the performance index or the malfunction that are counter terminal, access switch, core switch, server area access switch and business system server are assessed, and by assessment result simply being added up to assess the availability of current business system.
When utilizing the availability of said method evaluating system, only with the availability of the operation system simple set as a plurality of nodes, do not consider the relevance between the node.But in actual applications, for example the first core switch A1 among Fig. 1 and the second core switch A2 form the double-core redundancy structure, the machine if the first core switch A1 delays then only can cause the availability of the first business system server H, the second business system server N and the 3rd business system server M to have hidden danger; The machine if the second core switch A2 also delays then can cause the first business system server H, the second business system server N and the 3rd business system server M can not access fully; If the link between second server district access switch C and the second business system server N disconnects, then only have the second business system server N to access, and the first business system server H and the 3rd business system server M can normally use.Can find out, have close association between internodal relation and the system availability in the operation system, can not accurately know the current time of day of operation system according to above-mentioned appraisal procedure of the prior art.
Summary of the invention
For defects, the invention provides a kind of operation system usability evaluation method and system, in order to realize effective, the accurate evaluation of operation system availability.
Operation system usability evaluation method provided by the invention comprises:
Network element failure event in the monitoring operation system is obtained the healthy score value of network element according to preset rules, and described network element comprises node and link;
The number of times that occurs in the operation system path according to node obtains the weight of node;
Obtain the weight of link according to the link association node;
Assess the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm.
Operation system usability assessment system provided by the invention comprises:
Healthy score value computing module is used for each network element failure event of monitoring operation system, obtains the healthy score value of network element according to preset rules, and described network element comprises node and link;
The node weights computing module, the number of times that occurs in the operation system path according to node obtains the weight of node;
The link weight computation module is for the weight of obtaining link according to the link association node;
Operation system availability assessment module is used for assessing the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm.
According to operation system usability evaluation method of the present invention and system, owing to not only obtain the healthy score value of network element by the event of failure of monitoring node and link, also by analyzing the relevance between each network element in the operation system, it is the path of operation system, for each network element that is not all of the degree of impact of operation system availability different weights is set according to each network element, and the availability of assessing operation system in conjunction with weight and the healthy score value thereof of network element, so can according to the concrete framework of operation system to its current upstate carry out effectively, accurately assessment.
Description of drawings
Fig. 1 is the operation system network topological diagram.
Fig. 2 is the flow chart of operation system usability evaluation method of the present invention.
Fig. 3 is the traversal schematic flow sheet of breadth First ergodic algorithm.
Fig. 4 is the structural representation of operation system usability assessment system of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, technical scheme of the present invention is clearly and completely described.
Fig. 2 is the flow chart of operation system usability evaluation method of the present invention.As shown in Figure 2, this operation system usability evaluation method comprises:
Step S100, network element failure event in the monitoring operation system is obtained the healthy score value of network element according to preset rules, and described network element comprises node and link;
Particularly, take the operation system shown in Fig. 1 as example, this operation system usability evaluation method is described.Topological structure as shown in Figure 1 comprises with lower node: the first access switch D, the second access switch E, the 3rd access switch F, the 4th access switch G, the first core switch A1, the second core switch A2, first server district access switch B, second server district access switch C, the first business system server H, the second business system server N and the 3rd business system server M.Comprise the operation system that corresponds respectively to three business system server among Fig. 1.The interdependent node of the network element of each operation system in comprising above node, also comprise the link between any two connected nodes, such as link between the link between the first access switch D and the first core switch A1 and the first core switch A1 and the first server district access switch B etc.
Each network element among Fig. 1 is monitored, to know its event that whether breaks down, surpass the event of failures such as threshold event, interface flash event and ethernet address resolution protocol (ARP) attack such as the equipment cpu busy percentage, required event of failure type of monitoring can preset.After knowing the various event of failures whether each network element be scheduled to, can obtain according to preset rules the healthy score value of network element.
Step S200, the number of times that occurs in the operation system path according to node obtains the weight of node;
Particularly, in the operation system shown in Fig. 1, counter terminal A is by four access switch access service systems (among Fig. 1 to access this operation system as example by the second access switch E), when obtaining the business service that a business system server H provides, namely need form the path of counter terminal A to the first business system server H.The path that meets above-mentioned condition has 16, corresponding with each access switch has 4, take the second access switch E as example, comprising: the first path (counter terminal A, the second access switch E, the first core switch A1, first server district access switch B, the first business system server H); The second path (counter terminal A, the second access switch E, the second core switch A2, first server district access switch B, the first business system server H); Third Road footpath (counter terminal A, the second access switch E, the second core switch A2, the first core switch A1, first server district access switch B, the first business system server H); The 4th path (counter terminal A, the second access switch E, the first core switch A1, the second core switch A2, first server district access switch B, the first business system server H).Can learn that in 16 whole paths, the second access switch E appears at wherein in 4 paths, then the second access switch E is 0.25 for providing the weight of the operation system of business service by business system server H.
Step S300 obtains the weight of link according to the link association node;
Particularly, similar with node, different internodal links shared weight in operation system is not identical yet, and the weight of the link between two nodes depends on the weight of these two associated nodes.This link weighted value for example is the mean value of two node weights or is the weight of arbitrary node wherein, preferably, obtain the weight of link according to the business system server node far away in two node middle distance operation systems of link association, when for example calculating the link weight between the second access switch E and the first core switch A1, because the second access switch E is far away with respect to the first core switch A1 distance the first business system server H, therefore should get the weight of the second access switch E as the weight of this link.
Step S400 assesses the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm.
Particularly, assess the availability of operation system according to pre-defined algorithm according to the weight of the weight of the healthy score value of each network element in the operation system of in step S100, obtaining, the node that in step S200, obtains and the link that in step S300, obtains.Wherein, this pre-defined algorithm can comprise multiple, for example the product of the network element weight that the healthy score value of each network element in the operation system is corresponding with it adds up, or according to each the path health degree in the healthy score value of network element and the network element weight calculation operation system, and the availability of the health degree computing service system of the All Paths in the comprehensive business system.
Operation system according to above-described embodiment can be used appraisal procedure, owing to not only obtain the healthy score value of network element by the event of failure of monitoring node and link, also by analyzing the relevance between each network element in the operation system, it is the path of operation system, for each network element that is not all of the degree of impact of operation system availability different weights is set according to each network element, and the availability of assessing operation system in conjunction with weight and the healthy score value thereof of network element, so can according to the concrete framework of operation system to its current upstate carry out effectively, accurately assessment.
Further, can be with in the appraisal procedure in the operation system of above-described embodiment, each network element failure event in the described monitoring operation system, according to preset rules, the step of obtaining the healthy score value of network element comprises:
Step S101 sets up the tabulation of network element health evaluating, and described network element health evaluating tabulation comprises network element failure event and the point system corresponding with described network element failure event;
Step S102 monitors the network element event of failure and obtains point system corresponding to event of failure by inquiring about described network element health evaluating tabulation;
Step S103 obtains the healthy score value of network element according to described point system.
Particularly, table 1 is an example of health evaluating tabulation.
Table 1
As shown in table 1, the initial value of healthy score value is 100 minutes, and each event of failure has the deduction of points score value corresponding with it, and for example when a certain network element generation power failure, healthy score value descended 50 minutes, and then healthy score value is 50 minutes.
When the related a plurality of event of failure of network element, if these a plurality of event of failures belong to same type, then only get the healthy score value that these a plurality of event of failure middle grades the highest (namely deduct mark maximum) calculate network element.Wherein, the fault of same type refers to the common various faults that is caused by the same source of trouble, and example ARP attack, ARP Denial of Service attack and ARP scanning attack as shown in table 1 belongs to the event of failure of same type; Link DOWN, the unreachable event of equipment and the unreachable event of failure that belongs to same type of topological critical path; Interface receiving velocity threshold value cross the border event and the flow of event, interface transmission rate threshold value that cross the border surpasses the event of failure that threshold value belongs to same type continuously.Adopt this mode can avoid when network element produces a plurality of fault because of a source of trouble, deducting its too much healthy score value, thereby causing the result inaccurate.
When the related a plurality of dissimilar event of failure of network element, then the deduction of points score value of these a plurality of event of failures is carried out from high to low ordering, and the healthy score value deduction of points of adopting following formula 1 cumulative these event of failures to cause, until healthy score value was down to 0 minute.
The healthy score value of network element=100-S1-S2/2-......-Sn/n formula 1
In above-mentioned formula 1, n is the number of the dissimilar event of failure of network element association, and Sn is the healthy score value of n the required deduction of event of failure, and satisfy S1 〉=S2 〉=... 〉=Sn.For example: network element has 3 dissimilar event of failures, and the deduction of points score value that these 3 event of failures cause respectively is 30 minutes, 20 minutes and 10 minutes, and then the healthy score value of this network element is that 100-30-20/2-10/3=56.7 divides.
Although here illustration calculate the healthy score value of network element according to formula 1, but also can take other modes: for example with the deduction of points score value that directly deducted a plurality of event of failures in 100 minutes, but be 0 because the healthy score value that calculates in this manner has larger possibility, be that a plurality of network elements of 0 can't effectively be distinguished its current state difference for healthy score value, therefore the above-mentioned formula 1 of preferred employing calculates the healthy score value of network element, can reflect more intuitively the health status of network element.
Further, at the operation system usability evaluation method of above-described embodiment, the step that the described number of times that occurs in the operation system associated pathway according to node obtains the weight of network element comprises:
Step S201 obtains the operation system path;
Step S202 knows that a certain path does not comprise whole nodes in other arbitrary paths if detect, and determines that then described path is active path;
Step S203 appears at the weight that number of times in the described active path obtains node according to node.
Particularly, for example adopt " breadth First ergodic algorithm " of the prior art to obtain the All Paths of operation system.Fig. 3 is the traversal schematic flow sheet of breadth First ergodic algorithm, and the digitized representation algorithm that wherein indicates is to the traversal order of node, and wherein label is that 1 node is starting point.As shown in Figure 3, the order of breadth First traversal is layering, as often as possible access owns " brother " nodes on every one deck.
Particularly, after obtaining the All Paths of operation system according to above-mentioned breadth First ergodic algorithm, this All Paths can comprise some Invalid paths, for example in operation system corresponding to as shown in fig. 1 the first business system server H, Third Road footpath (counter terminal A, the second access switch E, the second core switch A2, the first core switch A1, first server district access switch B, the first business system server H) and the 4th path (counter terminal A, the second access switch E, the first core switch A1, the second core switch A2, first server district access switch B, the first business system server H) whole network elements in the first path and the second path have been comprised respectively, just increased on its basis the link between the first core switch A1 and the second core switch A2, so Third Road footpath and the 4th path are abandoned as Invalid path, and only calculate the network element weight in conjunction with remaining active path after getting rid of the void in whole path.
Operation system usability evaluation method according to above-described embodiment, after obtaining the operation system path, whether be that active path is judged to the path, the Invalid path that will comprise whole nodes in other paths abandons, so in computing node weight process, by getting rid of these Invalid paths, and only consider that node appears at the number of times in the active path, can avoid repeating to consider the importance of node, the weight that calculates is more accurate.
Further, in the operation system usability evaluation method of above-described embodiment, comprise according to the weight of the healthy score value of described network element and the described network element step according to pre-defined algorithm assessment operation system availability:
Step S401 is according to the healthy score value of network element and the healthy score value in Weight Acquisition path of network element;
Step S402 calculates the availability score value of described operation system according to the healthy score value in described path.
Particularly, non-healthy network element in the related network element in each path (being the network element that healthy score value was lower than 100 minutes) is carried out the ordering from low to high of healthy score value, the healthy score value that comes the network element of n position is the healthy score value/n of network element for the impact of the healthy score value in this path, and the healthy score value that is this path deducts (the healthy score value of 100-network element)/n.For example have two network elements to break down in the path, the health degree of first network element is that the health degree of 70, the second network elements is 80, and then the healthy score value in this path is that 100-(100-70)-(100-80)/2=60 divides.Further, if comprise the unreachable fault of any network element (for example equipment is unreachable or link DOWN or topological critical path unreachable) in the path, then the healthy score value in this path drops to 0 immediately.
Behind the healthy score value of the All Paths that gets access to this operation system, according to path healthy score value order from low to high sorted in unhealthy path, and according to following formula 2 computing service system availability score values:
F (n)=100-K (formula 2 of 1 * S1+1/2 * S2+1/3 * S3+......+1/n * Sn)
Wherein, n is the number in unsound path, Sn is that the healthy score value decline score of n paths (is preferably taked 1 minute system, for example the healthy score value in the path of n paths is 80 minutes, namely deducted healthy score value 20 minutes, then healthy score value descends to such an extent that be divided into 0.2), K is a constant, it can calculate according to following formula 3 and obtain:
K (1+1/2+1/3+......+1/N)=100 formula 3
Wherein, N is all path number of operation system, is preferably all active path numbers.
For example, the active path number that certain operation system has is 240, and calculating the K value of this moment according to formula 3 so is 16.5.At this moment, if there is and only has a network element unreachable fault to occur in the operation system, and the path number of this network element bearer service system is 4, then cause 4 paths fully unreachable, the healthy score value that is this 4 paths descends to such an extent that be divided into 1, then calculates operation system availability score value F (n)=100-16.5 (1 * 1+1/2 * 1+1/3 * 1+1/4 * 1)=65.9 according to formula 2.This kind situation for example has 120 the first business system server H shown in access switch access Fig. 1 for working as, and when a certain access switch was delayed machine, the availability score value of the operation system that then the first business system server H is corresponding was 65.9.
Although here illustration come computing service system availability score value in conjunction with formula 2 and formula 3, also can take other modes: for example calculate according to following formula 4:
F (n)=100-K (S1+S2+S3+......+Sn) formula 4
Wherein, K=100/N.But when calculating in such a way, the first business system server H shown in 120 access switch access Fig. 1 for example ought be arranged, when a certain access switch is delayed machine, the operation system availability score value that then calculates is F (n)=100-100 (1+1+1+1)/240=98.3, owing in this computational methods, give identical weight for each path, so the operation system availability score value that calculate this moment is higher, it has ignored the larger hidden danger that unhealthy path exists for operation system, therefore preferably takes above-mentionedly to come computing service system availability score value in conjunction with formula 2 and formula 3.
Operation system usability evaluation method according to above-described embodiment, because the availability of operation system derives from fact the operation conditions in each path of operation system, and be the relation of multi-to-multi between service path and the network element, namely a network element breaks down, and may affect a plurality of paths; Therefore and a plurality of network elements break down, and may only affect a path, at first according to the healthy score value of network element calculating path, again according to the availability score value of the healthy score value computing service system in path, can obtain accurately, real operation system current state.
Fig. 4 is the structural representation of operation system usability assessment system of the present invention.As shown in Figure 4, the operation system usability assessment system comprises:
Healthy score value computing module is used for each network element failure event of monitoring operation system, obtains the healthy score value of network element according to preset rules, and described network element comprises node and link;
The node weights computing module, the number of times that occurs in the operation system path according to node obtains the weight of node;
The link weight computation module is for the weight of obtaining link according to the link association node;
Operation system availability assessment module is used for assessing the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm.
It can be the server that independently is arranged in the network of operation system that the operation system usability assessment system of above-described embodiment is carried out operation system, its flow process of carrying out the operation system availability assessment is identical with the operation system usability evaluation method of above-mentioned arbitrary embodiment, so locate to repeat no more.
According to the operation system usability assessment system of above-described embodiment owing to not only obtain the healthy score value of network element by the event of failure of monitoring node and link, also by analyzing the relevance between each network element in the operation system, it is the path of operation system, for each network element that is not all of the degree of impact of operation system availability different weights is set according to each network element, and the availability of assessing operation system in conjunction with weight and the healthy score value thereof of network element, so can in conjunction with the concrete framework of operation system to its current upstate carry out effectively, accurately assessment.
Further, in the operation system usability assessment system of above-described embodiment, described healthy score value computing module comprises:
The unit is set up in network element assessment tabulation, is used for setting up the tabulation of network element health evaluating, and described network element health evaluating tabulation comprises network element failure event and the point system corresponding with described network element failure event;
The network element monitoring means is used for monitoring network element event of failure and obtains point system corresponding to event of failure by inquiring about described network element health evaluating tabulation;
Healthy score value computing unit is for the healthy score value that obtains network element according to described point system.
Further, in the operation system usability assessment system of above-described embodiment, the node weights computing module comprises:
The path acquiring unit is used for obtaining the operation system path;
The path detection unit knows that a certain path does not comprise whole nodes in other arbitrary paths if be used for detecting, and determines that then described path is active path;
The node weights acquiring unit is used for obtaining according to the number of times that node appears at described active path the weight of node.
Further, in the operation system usability assessment system of above-described embodiment, the link weight computation module comprises:
Interdependent node Weight Acquisition unit is for the weight of two nodes that obtain link association;
Link Weight Acquisition unit, be used for according to the mean value of the weight of two nodes of link association or wherein the weight of arbitrary node determine the weight of link.
Further, in the operation system usability assessment system of above-described embodiment, operation system availability assessment module comprises:
The healthy score value acquiring unit in path is used for according to the healthy score value of network element and the healthy score value in Weight Acquisition path of network element;
Operation system availability score value assessment unit is for the availability score value that calculates described operation system according to the healthy score value in described path.
According to the operation system usability assessment system of above-mentioned arbitrary embodiment, the network failure (being the event of failure of network element) of operation system availability score value and realization can be connected, provide demonstration, assay surface, so that system manager's monitoring.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. an operation system usability evaluation method is characterized in that, comprising:
Network element failure event in the monitoring operation system is obtained the healthy score value of network element according to preset rules, and described network element comprises node and link;
The number of times that occurs in the operation system path according to node obtains the weight of node;
Obtain the weight of link according to the link association node;
Assess the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm;
Each network element failure event in the described monitoring operation system, the step of obtaining the healthy score value of network element according to preset rules comprises:
Set up the tabulation of network element health evaluating, described network element health evaluating tabulation comprises network element failure event and the point system corresponding with described network element failure event;
Monitor the network element event of failure and obtain point system corresponding to event of failure by inquiring about described network element health evaluating tabulation;
Obtain the healthy score value of network element according to described point system;
The step that the described number of times that occurs in the operation system path according to node obtains the weight of network element comprises:
Obtain the operation system path;
Know that a certain path does not comprise whole nodes in other arbitrary paths if detect, determine that then described path is active path;
Appear at the weight that number of times in the described active path obtains node according to node.
2. operation system usability evaluation method according to claim 1 is characterized in that, the described step of obtaining the weight of link according to the link association node comprises:
According to the mean value of the weight of two nodes of link association or wherein the weight of arbitrary node determine the weight of link.
3. operation system usability evaluation method according to claim 1 is characterized in that, described healthy score value and the weight of described network element according to described network element comprises according to the step of pre-defined algorithm assessment operation system availability:
According to the healthy score value of network element and the healthy score value in Weight Acquisition path of network element;
Calculate the availability score value of described operation system according to the healthy score value in described path.
4. an operation system usability assessment system is characterized in that, comprising:
Healthy score value computing module is used for each network element failure event of monitoring operation system, obtains the healthy score value of network element according to preset rules, and described network element comprises node and link;
The node weights computing module, the number of times that occurs in the operation system path according to node obtains the weight of node;
The link weight computation module is for the weight of obtaining link according to the link association node;
Operation system availability assessment module is used for assessing the operation system availability according to the healthy score value of described network element and the weight of described network element according to pre-defined algorithm;
Described healthy score value computing module comprises:
The unit is set up in network element assessment tabulation, is used for setting up the tabulation of network element health evaluating, and described network element health evaluating tabulation comprises network element failure event and the point system corresponding with described network element failure event;
The network element monitoring means is used for monitoring network element event of failure and obtains point system corresponding to event of failure by inquiring about described network element health evaluating tabulation;
Healthy score value computing unit is for the healthy score value that obtains network element according to described point system;
Described node weights computing module comprises:
The path acquiring unit is used for obtaining the operation system path;
The path detection unit knows that a certain path does not comprise whole nodes in other arbitrary paths if be used for detecting, and determines that then described path is active path;
The node weights acquiring unit is used for obtaining according to the number of times that node appears at described active path the weight of node.
5. operation system usability assessment system according to claim 4 is characterized in that, described link weight computation module comprises:
Interdependent node Weight Acquisition unit is for the weight of two nodes that obtain link association;
Link Weight Acquisition unit, be used for according to the mean value of the weight of two nodes of link association or wherein the weight of arbitrary node determine the weight of link.
6. operation system usability assessment system according to claim 4 is characterized in that, described operation system availability assessment module comprises:
The healthy score value acquiring unit in path is used for according to the healthy score value of network element and the healthy score value in Weight Acquisition path of network element;
Operation system availability score value assessment unit is for the availability score value that calculates described operation system according to the healthy score value in described path.
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