CN116016348A - Non-invasive dynamic flow balancing method - Google Patents
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- CN116016348A CN116016348A CN202211712059.4A CN202211712059A CN116016348A CN 116016348 A CN116016348 A CN 116016348A CN 202211712059 A CN202211712059 A CN 202211712059A CN 116016348 A CN116016348 A CN 116016348A
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Abstract
The invention discloses a non-invasive dynamic flow balancing method, which comprises the following steps: s1, respectively configuring a filtering transponder responsible for overload message interception and forwarding for each network card at a link layer; s2, collecting the outlet flow of each network card; s3, constructing an overloaded network card list, an un-overloaded network card list and a forwarding configuration table of each overloaded network card, and starting a filtering repeater of the overloaded network card; s4, when the overloaded network card receives the message, the filtering repeater intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and calculates the load flow of the overloaded network card and the non-overloaded network card; s5, updating an overload network card list, an un-overload network card list and a forwarding configuration table according to the load flow and an overload threshold; and S6, updating the working state of the filter transponder according to the updated overloaded network card list and the non-overloaded network card list, and returning to S4 after every flow monitoring interval. The invention can realize flow balance on the whole machine line and improve the whole service quality.
Description
Technical Field
The invention belongs to the technical field of computers, and particularly relates to a non-invasive dynamic flow balancing method.
Background
In edge scenarios, to improve the throughput of the network, multiple lines are typically established on one server to connect to the internet. The program of the external service can use all lines to perform the external service at the same time and send data. However, the client program that initiates the request to the server comes from every corner of the internet, and cannot control their access time and frequency. Although dispatch services may allow these requests to enter the server via different lines, deviations will always occur, resulting in some lines being overloaded and even exceeding the load carrying capacity of the line, resulting in a reduced quality of service, while other lines are idle. Therefore, the line quality of the whole machine can be reduced, and the service is affected.
There are many methods for solving the line unevenness in the prior art, for example: the service program is monitored in real time and notifies the dispatching system, but the service program and the dispatching system algorithm need to be modified; or by aggregating each physical line, using an IP address to serve the outside, and then balancing all traffic loads to each line, but this scheme cannot be well developed in an edge scenario, and needs a switch or router of the opposite end to support line aggregation, which is not supported in most edge environments.
Disclosure of Invention
Aiming at the problems, the invention provides a non-invasive dynamic flow balancing method, which solves the problems that the existing request scheduling system cannot adjust the flow of each line in real time, short-time requests are concentrated on certain lines, so that the utilization rate of the lines is unbalanced, and the quality of the lines is reduced due to the sudden flow. In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a non-invasive dynamic flow equalization method comprising the steps of:
s1, setting a flow monitoring interval t and an overload threshold value of each network card, and respectively configuring a filtering transponder for each network card at a link layer, wherein when the network card is overloaded, the filtering transponder is responsible for intercepting and forwarding an overload message;
s2, acquiring host circuit information and acquiring the outlet flow of each network card in real time;
s3, judging the overload condition of each network card according to the overload threshold value and the network card outlet flow, constructing an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card, and starting a filtering repeater of the overload network card;
s4, when the non-overloaded network card receives the message, the message is directly forwarded through the non-overloaded network card, and when the overloaded network card receives the message, the filtering forwarder intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and the load flow of the overloaded network card and the load flow of the non-overloaded network card are respectively calculated according to the forwarding flow;
s5, judging the overload condition of each network card again according to the load flow calculated in the step S4 and the overload threshold value of each network card so as to update an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card;
and S6, updating the working state of the filter transponder of each network card according to the updated overloaded network card list and the non-overloaded network card list, and returning to the step S4 after every flow monitoring interval t.
In step S4, when the overloaded network card receives the message, the filtering repeater intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and includes the following steps:
(1) calculating the maximum single-round processing amount M of the overloaded network card according to the forwarding proportion and the number of the non-overloaded network cards in the non-overloaded network card list;
the calculation formula of the maximum single-round processing capacity M of the overload network card is as follows:
M＝N*(1-R)/R；
wherein, N represents the total number of the non-overloaded network cards in the non-overloaded network card list, and R represents the forwarding proportion recorded by the forwarding configuration table of the overloaded network cards;
(2) the overload network card directly sends the received first M messages from the local network card;
(3) the filtering repeater sequentially and respectively transfers the received M+n+N+1-th to M+ (n+1) -th messages to each non-overloaded network card according to the non-overloaded network card list and the message receiving sequence, wherein N is a natural number.
The calculation formula of the load flow of the overload network card is as follows:
in the method, in the process of the invention,
represents the outlet flow of the network card, Q ov,j And the load flow of the j-th overloaded network card is represented, N represents the total number of the network cards which are not overloaded in the network card list which are not overloaded, and M represents the maximum single-round processing amount of the overloaded network cards.
The calculation formula of the load flow of the non-overloaded network card is as follows:
in which Q No-ov,i Representing the load flow of the ith non-overloaded network card, P j The initiating forwarding flow of the j-th overloaded network card is represented, S represents the total number of the overloaded network cards, N represents the total number of the non-overloaded network cards in the non-overloaded network card list,
indicating the network card outlet flow.
In step S5, updating the forwarding configuration table of each overloaded network card refers to updating the forwarding ratio of the overloaded network card and the overloaded network card in the forwarding configuration table according to the updated overloaded network card list, where the updated forwarding ratio has a calculation formula as follows:
in the method, in the process of the invention,
representing the updated forwarding proportion, B representing the overload threshold, +.>
Representing overload flow derived from load flowValues.
The invention has the beneficial effects that:
the invention does not need to modify any service program, and any service can use the flow balancing method. Meanwhile, the method does not modify any underlying network topology structure, can be directly applied to the existing multi-line network environment, and is transparent, non-perception and non-invasive. The flow of each line network card can be dynamically monitored in real time, and when the flow of some lines exceeds the bearing capacity of the lines, partial flow can be immediately guided to the lines with lower loads, so that the flow load of each line is balanced, the problem of service quality of overload lines is avoided, the flow balance on the whole machine line is realized, and the whole service quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a prior art message transmission.
Fig. 2 is a schematic diagram of message forwarding in the present application.
Fig. 3 is a schematic diagram of network card traffic monitoring.
Fig. 4 is a schematic diagram of forwarding rules.
Fig. 5 is a schematic diagram of the load flow reasoning process.
Fig. 6 is a schematic of the workflow of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, there are multiple network cards on the existing server, and the service program on the server detects the network cards and provides services to the outside by using the network cards. The external request enters the server from which network card, and the service program processes and sends the reply data again through the same network card. Typically, the amount of data sent in reply will be much greater than the amount of data requested in advance. When a large number of requests come in from a network card line, a large amount of transmission data is generated on the network card, and when the line bandwidth set by an operator is exceeded, overload is caused.
The conventional solution must modify the network structure of the link layer, for example, aggregate network cards together to form a larger virtual network card, and the application program only uses this virtual network card to communicate, so that all traffic can be averaged to each line; or the application itself handles such overload situations internally. All of these approaches have resulted in major modifications to existing operating environments, either modifying the underlying network or modifying the application. The method and the device have the advantages that the defects of the two schemes are avoided, dynamic balancing of flow can be achieved under the condition that the existing network environment and service program are not required to be changed at all, and the method and the device are specifically described below.
As shown in fig. 2 to 6, a non-invasive dynamic traffic balancing method is applied to a network link layer of a server, and includes the following steps:
s1, setting a flow monitoring interval t and an overload threshold value of each network card, and respectively configuring a filtering transponder for each network card at a link layer, wherein when the network card is overloaded, the filtering transponder intercepts and forwards an overload message;
the overload threshold is a percentage value of the maximum bearable flow of the network card, can be freely configured according to the requirement, and is generally set to 80%. When the monitored network card outlet flow exceeds the threshold, the network card is overloaded, and flow equalization processing is needed. Likewise, the monitoring interval can be freely set by the user, for example: 10s or 20s.
The filtering transponder is arranged at a link layer through which the message passes, and when the IP protocol stack determines a network card for forwarding the message and the flow of the network card is overloaded, the filtering transponder is started and intercepts the message data at the link layer, and determines whether the message is sent by the network card or forwarded to other network cards with idle flow according to a set forwarding rule. If the message is sent from the local network card, the filter transponder is released, and the message is directly sent from the local network card. If the message is required to be sent by other network cards, the filter repeater can directly transfer the message to the corresponding network card to be sent.
S2, acquiring host circuit information and acquiring the outlet flow of each network card in real time;
the line information comprises network card numbers, network card numbers and network card maximum bandwidths, and in order to ensure correct judgment and permission of balanced work, the information of how many available network cards are on the server host, such as maximum flow bandwidths, overload threshold water level lines and the like which can be carried by each network card actually must be known in advance. By the information, after the amount of flow carried by the network card can be calculated, flow equalization is needed.
In specific application, the outlet flow of each network card can be obtained through the network card counter, which is the prior art, and the embodiment is not repeated. However, what is collected here is the amount of data actually sent by the network card, which cannot represent the actual load applied to the network card by the upper layer application.
S3, judging the overload condition of each network card according to the overload threshold value and the network card outlet flow, constructing an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card, and starting a filtering repeater of the overload network card;
the forwarding configuration table comprises a network card number and a forwarding proportion, and can also comprise a target network card number, a target network card name and a forwarding counter corresponding to the target network card so as to store forwarding message information.
The calculation formula of the forwarding proportion is as follows:
R＝P/(B+P)； (1)
wherein R represents the forwarding proportion, B represents the overload threshold value, and P represents the flow value exceeding the overload threshold value when the network card is overloaded. In the initial state, the value of P is obtained by subtracting an overload threshold value from the outlet flow.
The overload network card list and the non-overload network card list both comprise network card numbers and network card MAC addresses, and the names of the network cards can be increased.
S4, when the non-overloaded network card receives the message, the message is directly forwarded through the non-overloaded network card, and when the overloaded network card receives the message, the filtering forwarder intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and calculates the load flow of the overloaded network card and the load flow of the non-overloaded network card respectively according to the forwarding flow;
when the overload network card receives the message, the filtering forwarder intercepts and forwards the message according to the forwarding configuration table and the non-overload network card list, and the method comprises the following steps of:
(1) calculating the maximum single-round processing amount M of the overloaded network card according to the forwarding proportion and the number of the non-overloaded network cards in the non-overloaded network card list;
the calculation formula of the maximum single-round processing capacity M of the overload network card is as follows:
M＝N*(1-R)/R； (2)
in the formula, N represents the total number of the non-overloaded network cards in the non-overloaded network card list, and R represents the forwarding proportion of the overloaded network cards. The forwarding rule set in the application meets
And obtaining a calculation formula of the maximum processing capacity M of the overload network card according to the conversion of the forwarding rule formula.
(2) The overload network card directly sends the received first M messages from the local network card;
(3) the filtering repeater sequentially and respectively transfers the received M+n+N+1-th to M+ (n+1) -th messages to each non-overloaded network card according to the non-overloaded network card list and the message receiving sequence, wherein N is a natural number.
A plurality of non-overloaded network cards exist in the non-overloaded network card list, and the overloaded network cards alternately use the non-overloaded network cards to forward the message so as to evenly distribute the overloaded traffic to the non-overloaded network cards. As shown in fig. 4, in the graph, m=4, n=4, and r=50, when the eth0 is overloaded, the eth0 processes 4 messages first, and directly sends out from the eth0 of the network card without forwarding, and then processes 4 messages again, and because the network cards that are not overloaded in the non-overloaded network card list are eth1, eth2, eth3, eth4 in sequence, the 4 messages to be processed are sequentially sent to eth1, eth2, eth3, eth4, respectively. In this embodiment, a register is provided in the filter repeater, which is used to store which network card is used for the current message, and after processing one message each time, the current count value is increased, and after the current count value exceeds the maximum table entry, that is, the total number of network cards that are not overloaded, the filter repeater starts from the beginning, and thus loops back and forth. According to the forwarding rule, forwarding according to the forwarding proportion in the forwarding configuration table can be guaranteed.
The calculation formula of the load flow of the overload network card is as follows:
in the method, in the process of the invention,
represents the outlet flow of the network card, Q ov,j And the load flow of the j-th overloaded network card is represented. From the forwarding proportion formula and forwarding rule formula +.>
Since the load traffic should be equal to the sum of the network card exit traffic and the originating forwarding traffic, and P should theoretically be forwarded out, i.e. the originating forwarding traffic, as a traffic value exceeding the overload threshold, equation (3) can be derived.
The calculation formula of the load flow of the non-overloaded network card is as follows:
in which Q No-ov,i Representing the load flow of the ith non-overloaded network card, P j The initiating forwarding flow of the j-th overloaded network card is represented, S represents the total number of the overloaded network cards, and the sum of S and N is equal to the total number of the server network cards, i is more than or equal to 1 and less than or equal to N.
The network card outlet flow is the flow acquired in real time and is also the flow actually sent out from the network card. If the network card bandwidth is exceeded, the transmission quality is reduced. The load flow refers to the flow that the application program prepares to send out from the network card in order to respond to the request of the user, and reflects how much load the application program will generate on the network card. The network card serving as the message forwarding initiator generates the initiating forwarding flow, namely, the filtering forwarder forwards the message to other network cards, so that the other network cards replace the sent flow. The network card as the message receiving party can generate receiving and forwarding flow, namely flow generated by receiving the messages forwarded by the filtering and forwarding device of other network cards.
S5, judging the overload condition of each network card again according to the load flow calculated in the step S4 and the overload threshold value of each network card in the step S1 so as to update an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card;
if the load flow of the network card is smaller than the overload threshold value of the network card, the network card is judged not to be overloaded, otherwise, the network card is judged to be overloaded. Updating the forwarding configuration table of each overloaded network card refers to the calculation formula of the forwarding proportion of the updated overloaded network card list as follows:
in the method, in the process of the invention,
representing the updated forwarding proportion, B representing the overload threshold, +.>
Representing overload flow value obtained according to load flow, which is communicatedAnd subtracting the overload threshold from the load flow of the network card.
S6, updating the working state of the filter transponder of each network card according to the updated overloaded network card list and the non-overloaded network card list, and returning to the step S4 after every flow monitoring interval t;
the working states of the filter transponders of all the non-overloaded network cards are closed, and the working states of the filter transponders of all the overloaded network cards are started.
The application also provides a non-invasive dynamic flow equalization system, comprising:
and a system configuration module: the method is used for setting a flow monitoring interval and an overload threshold value of each network card;
the network card line inquiry module: the system comprises a host line information acquisition module, a network card state judgment module and a network card information acquisition module, wherein the host line information acquisition module is used for acquiring host line information, monitoring the outlet flow of the network card in real time, and sending the outlet flow to the interception forwarding module and the network card state judgment module;
the network card state judging module: the system comprises a first flow monitoring interval, a second flow monitoring interval, a first network interface module, a second network interface module, a third network interface module, a fourth network interface module and a fourth network interface module, wherein the first network interface module is used for receiving the first network interface module and the second network interface module;
intercept forwarding module: corresponding to each network card, when the corresponding network card is overloaded, intercepting and forwarding the message received by the overloaded network card according to the forwarding configuration table and the non-overloaded network card list generated by the network card state judging module, and respectively calculating the load flow of the overloaded network card and the load flow of the non-overloaded network card according to the forwarding flow;
and an overload updating module: the system comprises a network card state judging module, a system configuration module, a load flow monitoring interval, a network card state receiving module, a network card state judging module and a forwarding configuration table, wherein the network card state judging module is used for judging the load flow of a network card, the network card state of the network card, the network card and the forwarding configuration table of each network card, the network card is used for receiving the load flow calculated by the interception forwarding module, and the network card state judging module is updated according to the load flow of the network card, the load flow of the network card which is not overloaded and the overload threshold value set by the system configuration module at every other flow monitoring interval, and the starting or closing state of the interception forwarding module of each network card is updated based on the updated network card list and the network card list which is not overloaded.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. A non-invasive dynamic flow equalization method, comprising the steps of:
s1, setting a flow monitoring interval t and an overload threshold value of each network card, and respectively configuring a filtering transponder for each network card at a link layer, wherein when the network card is overloaded, the filtering transponder is responsible for intercepting and forwarding an overload message;
s2, acquiring host circuit information and acquiring the outlet flow of each network card in real time;
s3, judging the overload condition of each network card according to the overload threshold value and the network card outlet flow, constructing an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card, and starting a filtering repeater of the overload network card;
s4, when the non-overloaded network card receives the message, the message is directly forwarded through the non-overloaded network card, and when the overloaded network card receives the message, the filtering forwarder intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and the load flow of the overloaded network card and the load flow of the non-overloaded network card are respectively calculated according to the forwarding flow;
s5, judging the overload condition of each network card again according to the load flow calculated in the step S4 and the overload threshold value of each network card so as to update an overload network card list, a non-overload network card list and a forwarding configuration table of each overload network card;
and S6, updating the working state of the filter transponder of each network card according to the updated overloaded network card list and the non-overloaded network card list, and returning to the step S4 at intervals of flow monitoring.
2. The non-invasive dynamic flow balancing method according to claim 1, wherein in step S4, when the overloaded network card receives the message, the filter repeater intercepts and forwards the message according to the forwarding configuration table and the non-overloaded network card list, and the method comprises the following steps:
(1) calculating the maximum single-round processing amount M of the overloaded network card according to the forwarding proportion and the number of the non-overloaded network cards in the non-overloaded network card list;
the calculation formula of the maximum single-round processing capacity M of the overload network card is as follows:
M＝N*(1-R)/R；
wherein, N represents the total number of the non-overloaded network cards in the non-overloaded network card list, and R represents the forwarding proportion recorded by the forwarding configuration table of the overloaded network cards;
(2) the overload network card directly sends the received first M messages from the local network card;
(3) the filtering repeater sequentially and respectively transfers the received M+n+N+1-th to M+ (n+1) -th messages to each non-overloaded network card according to the non-overloaded network card list and the message receiving sequence, wherein N is a natural number.
3. The non-invasive dynamic flow balancing method according to claim 1, wherein the calculation formula of the load flow of the overloaded network card is:
in the method, in the process of the invention,
represents the outlet flow of the network card, Q ov,j And the load flow of the j-th overloaded network card is represented, N represents the total number of the network cards which are not overloaded in the network card list which are not overloaded, and M represents the maximum single-round processing amount of the overloaded network cards.
4. The non-invasive dynamic flow balancing method according to claim 1, wherein the calculation formula of the load flow of the non-overloaded network card is:
in which Q No-ov,i Representing the load flow of the ith non-overloaded network card, P j The initiating forwarding flow of the j-th overloaded network card is represented, S represents the total number of the overloaded network cards, N represents the total number of the non-overloaded network cards in the non-overloaded network card list,
indicating the network card outlet flow.
5. The non-invasive dynamic traffic balancing method according to claim 1, wherein in step S5, updating the forwarding configuration table of each overloaded network card means updating the forwarding ratio of the overloaded network card and the overloaded network card in the forwarding configuration table according to the updated overloaded network card list, and the updated forwarding ratio has a calculation formula as follows:
in the method, in the process of the invention,
representing the updated forwarding proportion, B representing the overload threshold, +.>
Indicating an overload flow value derived from the load flow. />
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