JP2008250669A - Web monitoring control system, web server control device and web server control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Web monitoring control system, a Web server control device and a Web server control program, capable of preventing reduction of processing efficiency of a Web server by uniformly restricting a connection number of a client. <P>SOLUTION: In a Web system stabilization device 104 in this Web monitoring control system, an information collection part 171 receives a report of a situation of requests of respective Web servers not shown in Figure, and statistics of information such as a system resource or a simultaneous connection number are taken and are stored in a statistics-management database. An inspection control part 181 compares their statistics and the system resource, and outputs an inspection result to a decision processing part 191. A decision result execution part 192 instructs expansion/contraction of connection to the Web server requiring control about the connection number based thereon to stably operate the system. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a web monitoring control system, a web server control device, and a web server control program for monitoring and controlling a web server on a web that publishes various types of information using a plurality of computers connected to a network represented by the Internet. About.

  For example, there are various websites on the Internet, and a web server transmits various information in response to a request from a client computer (hereinafter simply referred to as a client). The web server has a file transmission function for transmitting a file requested by the client and an execution result transmission function for executing a program requested by the client and returning the result.

  Taking the Internet as an example, each client can freely access the web server without time restrictions. Therefore, when building a web system by starting up a web server, it is necessary to predict in advance how many requests such as file transfer requests from clients and requests to send program execution results will be per unit time. The system resources of the entire web are arranged so that such requests can be handled with a margin. For example, if the processing speed of a CPU (Central Processing Unit) of a computer constituting the web server and the capacity of the installed memory are set to an appropriate one, the processing capacity of one web server is not sufficient In such a case, distributed processing is performed by a plurality of web servers.

  Moreover, the web server resources are also provided with a margin, and the maximum number of connections to the client is also set assuming that a large amount of requests with a large amount of data are received in a short time.

  However, if the number of clients that can be connected to the web server at the same time is limited to a predetermined number, there may be a problem that a part of the connected clients is forcibly disconnected. This is because when a client requests a screen switch based on data sent from a connected web server, a request from another client may be interrupted and processed while the processing is interrupted. Because there was.

  Therefore, when switching screens, the first proposal is to prevent the interruption of other clients by holding the data in the management state of “screen switching” for the client. (For example, refer to Patent Document 1).

In addition, a traffic control device for controlling traffic is arranged between a plurality of clients and a plurality of web servers to be accessed, and the number of connections to each web server is controlled in relation to the maximum number of connections. A second proposal has been made.
Japanese Patent Laying-Open No. 2003-345680 (paragraph 0013, FIG. 1) JP-A-2005-184165 (paragraph 0087, FIG. 9)

  Of these, even if the first proposed web server terminates transmission of one unit of data to the client connected to the web server, the client is still in the management state of “switching screen”, and then the other Knows that it will process the data about the screen and send it to the client as well. Therefore, when the number of connections is the upper limit and a request from another client is waiting, the waiting client request is not interrupted.

  However, even when the number of connections has reached the upper limit, there may be a considerable margin in the resources of the corresponding web server when the amount of data of individual requests of the connected clients is small. Even in such a case, not accepting a new connection because the number of connections has reached the upper limit means that the time until the connection of an unconnected client takes a long time and the processing efficiency of the entire system deteriorates. There is a problem.

  The same applies to the second proposal in which the traffic control device is arranged between the client and the web server to control the number of connections. Moreover, the contents and trends of web service requests are greatly affected by the usage and timing of the user. Further, in the case of having various back-end systems such as databases and servers, it is difficult for the person in charge of the system to predict which service will be used more frequently depending on the contents of each service.

  For this reason, conventionally, when a web server is constructed, resources are allocated in advance so that there is a problem that resources become redundant and inefficient. In addition, when trying to tune the web service to the system staff, various cases are assumed, such as a request with a large amount of data coming in, or a small amount of data but a large number of requests. Therefore, not only is the burden on the system person in charge increased, but there is also a risk in the case of contrary to prediction, and its implementation was unrealistic.

  Accordingly, an object of the present invention is to obtain a web monitoring control system, a web server control apparatus, and a web server control program capable of preventing a decrease in web server processing efficiency by uniformly limiting the number of client connections. is there.

  According to the first aspect of the present invention, (a) connection means for connecting to a client, report means for sequentially reporting the contents of a request from a client connected by the connection means to a specific destination, and the client from the specific destination A plurality of web servers comprising: a notification receiving means for receiving notification about expansion / contraction of the number of connections; and a connection control means for expanding / reducing the connection of the connection means in accordance with the notification content received by the notification receiving means; The above-mentioned specific destination is connected to the plurality of web servers, receives the contents reported from the reporting means, and monitors the status of each web server resource, and the monitoring results of the monitoring means are described above. Determining means for determining whether the number of client connections needs to be increased or decreased for each of a plurality of web servers; and the determining means It is provided with a web server control device that includes a notifying means for notifying the web server to the appropriate this when it is determined to require scaling of the number of client connections to the web monitoring and control system.

  That is, in the present invention, the web server control device receives a report of the contents of a client request from each of a plurality of web servers, and monitors the status of the resources of these web servers. Then, from the monitoring results, it is determined whether or not the number of client connections needs to be expanded / reduced for each of the plurality of web servers, and when it is determined that the number of client connections needs to be expanded / reduced, I'm trying to notify you. This enables more flexible control than the conventional method of determining the number of client connections based only on one criterion of the maximum number of connections. Moreover, since the web server control apparatus controls a plurality of web servers, it is possible to perform control from the viewpoint of the entire communication system such as non-uniform access between the web servers.

  In the invention of claim 5, (a) a report receiving means connected to a plurality of web servers and receiving a report of a request status from a client to these web servers and a necessary amount of data accompanying these requests; (B) statistical means for collecting statistics on the status of individual web servers and the overall status of these web servers based on the reports received by this report receiving means; and (c) each web using the statistics of this statistical means. Monitoring means for monitoring the fluctuation state of server resources, (d) expansion / contraction object determination means for determining a web server that requires expansion / contraction of the number of client connections from the monitoring result of the monitoring means, and (e) the expansion / contraction object An enlargement / reduction notification means for performing notification for causing the web server determined to require expansion / reduction by the determination means to enlarge / reduce the number of connections; It is provided to the web server controller.

  In other words, in the present invention, the web server control device receives a report on the request status from the client to the web servers connected to the web server and the necessary data amount accompanying these requests, and based on this, the individual statuses are received. Statistics on the status of the web servers and the status of these web servers as a whole are taken. Then, using this statistic, the fluctuation state of the resource of each web server is monitored, the web server that requires expansion / contraction of the number of client connections is determined from the monitoring result, and the number of connections to these web servers is Notifications for scaling are performed. This enables more flexible control than the conventional method of determining the number of client connections based only on one criterion of the maximum number of connections. Moreover, since the web server control apparatus controls a plurality of web servers, it is possible to perform control from the viewpoint of the entire communication system such as non-uniform access between the web servers.

  In the invention described in claim 6, a computer of a web server control device that is connected to a plurality of web servers and controls the number of clients connected to these web servers, the web server control program is as follows: (B) the status of individual web servers based on the reports received in this report receiving process and the status of these requests. Statistical processing that takes statistics of the status of the entire web server, (c) monitoring processing that monitors the fluctuation state of each web server resource using the statistics taken in this statistical calculation processing, and (d) by this monitoring processing Enlargement / reduction target judgment that identifies the web server that requires enlargement / reduction of the number of client connections from the monitoring result And processing, is characterized in that to perform the scaling notification process of notifying for causing (e) number of connections scaled relative to determine web servers that require scaling in this scaling target determination process.

  That is, in the present invention, the technical idea of the invention described in claim 5 is realized as a web server control program.

  As described above, according to the present invention, the web server control device receives a report on the status of a client request to each web server, and gives necessary instructions to these web servers using the result. Therefore, unlike the device that controls the traffic interposed between the client and the web server, it is possible to perform the control according to the actual situation while grasping the status of each web server. For this reason, not only can the number of connections be controlled, but even if a failure occurs in a part of the web server, the corresponding web server is controlled or appropriate for other affected web servers. Comprehensive control such as giving a simple instruction becomes possible, which contributes to the improvement of system stability.

  Hereinafter, the present invention will be described in detail with reference to examples.

FIG. 1 shows the configuration of a web monitoring control system according to an embodiment of the present invention. The web monitoring and control system 100, a network 101 such as the Internet, the first to the web server 102 ₁ to 102 _n of the n launched a website, respectively, first to able to access these m clients 103 _{1 to} 103 _m are connected to a web system stabilization device 104 that performs web monitoring and control.

Here, if there is an access from any one of the _first to mth clients 103 _{1 to} 103 _m , the first to _nth web servers 102 _{1 to} 102 _n make requests to the connected ones. Accept. For example, if the first client 103 ₁ makes a request for file transmission to the _first web server 102 ₁ , the requested file is transmitted to the first web server 102 ₁ . Further, when the execution of the program is requested, this is executed and the processing result is transmitted to the _first web server 1021.

The web system stabilizing device 104 reports a situation in which each of the first to _n-th web servers 102 _{1 to} 102 _n receives a request from any of the _first to m-th clients 103 _{1 to} 103 _m. receive. Then, using a predetermined database, the situation of each of the web servers 102 _{1 to} 102 _n is analyzed to determine whether the resources of these web servers 102 _{1 to} 102 _n are tight or have sufficient margin To do. Then, the determination result is transmitted to each of the _first to n-th web servers 102 _{1 to} 102 _n . For example, even if the first web server 102 ₁ has reached the maximum number of connections by connecting to some of the _first to m-th clients 103 _{1 to} 103 _m , the usage status of the system resource has an upper limit value. If it is determined that the number is significantly lower, an instruction is given to further increase the number of connections. On the other hand, for example, when it is determined that the system resource status of the _first web server 1021 exceeds the upper limit value, the automatic blocking process is instructed so as not to be overloaded. The number of connections in the web server 102 is naturally reduced. Of course, when a plurality of web servers 102 capable of handling the same request are connected to the web system stabilization device 104, the number of connections of a specific web server 102 is reduced by distributing the request processing among them. It is also possible to make it.

In this way, the web system stabilizing device 104 stabilizes the processing of the _first to n-th web servers 102 _{1 to} 102 _n and thereby improves the processing efficiency of the entire web system.

FIG. 2 shows an outline of the configuration of the first web server in such a web monitoring control system. Web server 102 ₂ to 102 _n of the second to n shown in FIG. 1, the first web server 102 ₁ and the circuit configuration is basically the same. Therefore, illustration of the _{second to} nth web servers 102 _{2 to} 102 _n and a specific description of the circuit configuration are omitted.

The first web server 102 ₁ includes a CPU 121, a basic hardware 124 including a memory 122 storing a control program for various controls and a working memory area, and a communication module 123. Then, the CPU 121 executes the control program in the memory 122 to realize the web service unit 130 and the processing unit 140.

Among them, the web service unit 130 is a circuit part that processes requests from the _first to m-th clients 103 _{1 to} 103 _m shown in FIG. 1, and includes a client connection processing unit 131, a client request receiving unit 132, The processing result transmission unit 133 and the maximum connection number storage unit 134 are configured. Here, the client connection processing unit 131 connects to the first to m-th clients 103 _{1 to} 103 _m based on the maximum number of connections stored in the maximum connection number storage unit 135. Here, the maximum number of connections is the same concept as the upper limit value of the number of connections that has been conventionally set in a general web server. However, in the case of this embodiment, the maximum number of connections is used as a temporary reference, and more clients 103 are connected in some cases.

The client request receiving unit 132 receives the request when connected to any one of the _first to mth clients 103 _{1 to} 103 _m . The received content is sent to the processing unit 140 for processing. The processing result is returned to the web service unit 130, and the processing result transmission unit 133 returns this to the requesting client 103.

  On the other hand, the processing unit 140 includes a client request processing unit 141, a request / data amount reporting unit 142, a determination result receiving unit 143, and a block / expansion processing unit 144. Here, the client request processing unit 141 receives the content of the request received by the client request receiving unit 132 and processes the request. For example, the requested web page is read and sent to the processing result transmission unit 133, or a predetermined process is performed and the processing result is transmitted to the processing result transmission unit 133.

The request / data amount reporting unit 142 is a circuit part that reports to the web system stabilizing device 104 shown in FIG. 1 that the client request receiving unit 132 has received a request and the amount of data required to process the request. A report is also made about the amount of processing completed by making a request in the past. Reporting may be performed for each case or may be performed in a relatively short period. In this embodiment, reporting is performed at a constant cycle. The determination result receiving unit 143 is a circuit part that receives the determination result determined by the web system stabilizing device 104 based on the statistical processing for the first web server 102 ₁ based on the report of the request / data amount reporting unit 142.

Based on the determination result sent from the web system stabilization device 104 shown in FIG. 1 received by the determination result receiving unit 143, the blocking / expansion processing unit 144 determines whether the _first web server 1021 has the maximum number of connections or Feedback control is performed to reduce (close the connection) or increase (expand the connection) the number of connections when the number of connections exceeds the number of clients 103. For example, even though the first web server 102 ₁ is connected to some of the _first to m-th clients 103 _{1 to} 103 _m with the maximum number of connections, the system resource consumption is low. If it has been determined, the number of connections is increased by a predetermined amount. On the other hand, when the first web server 102 ₁ is connected to some of the first to m-th clients 103 _{1 to} 103 _{m with} the maximum number of connections or exceeding the maximum number, the system resource is If it is determined that the threshold value has been approached beyond the threshold, the number of connections is decreased by a predetermined amount.

The blockage or expansion of the connection by the blockage / expansion processing unit 144 is performed in such a way that the service to the currently connected client 103 does not stop. That is, the connection blockage is performed by a process of natural reduction by not connecting on behalf of the new client 103 when the client 103 that has finished the service ends the connection. As for the expansion of the connection, a predetermined number of connections are started for the first to mth clients 103 _{1 to} 103 _m that are newly requesting a connection, and this is handled accordingly. The request / data amount reporting unit 142 reports the contents to the web system stabilizing device 104 and waits for a determination result, and the number of connections is increased without difficulty by feedback control. As described above, in the web monitoring control system 100 according to the present embodiment, each of the first to n-th web servers 102 _{1 to} 102 _n provides information to the web system stabilization device 104 and obtains a professional determination result. Thus, control beyond the conventional maximum number of connections is possible.

  FIG. 3 shows an outline of the configuration of the web system stabilizing device of this embodiment. The web system stabilizing device 104 includes a CPU 161, basic hardware 164 including a memory 162 storing a control program for various controls and a working memory area, and a communication module 163. The CPU 161 executes the control program in the memory 162, thereby realizing the management unit 170, the monitoring unit 180, and the determination unit 190.

Here, the management unit 170 includes an information collection unit 171, an information accumulation management unit 172, and a statistics management database 173. Information collection unit 171, these and occurrence of the request through the request data amount reporting unit 142 from those in connection among the first to the web server 102 ₁ to 102 _n of the n shown in FIG. 1 (2) To receive reports on the amount of data required by the request. These reports may be performed each time a request is made as described with respect to the request / data amount report unit 142, or may be performed at regular time intervals.

The statistics management database 173 includes system resources for the _first to n-th web servers 102 _{1 to} 102 _n , specifications of the basic hardware 124 (FIG. 2) such as the CPU 121, current and recent Data useful for determination processing such as the number of simultaneous connections is stored. The information accumulation management unit 172 uses the collected quest count reception status, the request data amount, the usage status of system resources, and various data stored in the statistics management database 173 for the web server 102 to be managed. And statistical management. The result of statistical management is reflected in the statistical management database 173.

The monitoring unit 180 includes an inspection control unit 181 and a threshold information storage unit 182. Here, the threshold information storage unit 182 stores an upper limit value and a lower limit value as threshold values of the system resource. The inspection control unit 181 reads the status of the system resource from the statistics management database 173 in order for each of the first to _n-th web servers 102 _{1 to} 102 _n and stores the upper limit stored in the threshold information storage unit 182. Whether it is within the range of the value and the lower limit value is determined. When the determination result is within the range between the upper limit value and the lower limit value, no special control is performed as the normal range. On the other hand, when the determination result exceeds the upper limit value or less than the lower limit value, the monitoring unit 180 checks the direction beyond the normal range and the degree thereof together with the identification information for identifying the corresponding web server 102. The result information 184 is sent to the determination unit 190.

  However, it is a condition that the current number of connections of the client 103 of the corresponding web server 102 exceeds the maximum number of connections. Of course, depending on the setting of the web server 102, this additional condition can be prevented from being adopted. When this additional condition is not adopted, if the number of connections of the current client 103 exceeds the maximum number of connections, the inspection result information 184 is always sent to the determination unit 190 when the determination result exceeds the normal range.

The determination unit 190 includes a determination processing unit 191 and a determination result execution unit 192. Here, when the determination unit receives the inspection result information 184 from the monitoring unit 180, the determination processing result 194 adapted to the control content of the corresponding web server 102 with reference to the statistics management database 173 is sent to the determination result execution unit 192. Supply. This is because the contents of the control of the block / expansion processing unit 144 shown in FIG. 2 are not necessarily the same by the _first to n-th web servers 102 _{1 to} 102 _n . The determination result execution unit 192 sends the processing data for executing the determination result and optimizing the usage status of the system resources to the corresponding web server 102 as the determination result.

Note that the first to m-th clients 103 _{1 to} 103 _m shown in FIG. 1 are a notebook or desktop personal computer, a cellular phone, a PDA (Personal Digital Assistant), a PHS (Personal Handy-phone System), or the like. It is a normal information processing terminal. If these are equipped with a predetermined browser, the first to n-th web servers 102 _{1 to} 102 _n can be accessed without using a special application program. As described above, the configurations of the _first to m-th clients 103 _{1 to} 103 _m are not special, and illustration and description of these specific circuit configurations are omitted.

It will now be described in conjunction with specific processing flow state connections tuning is performed for such example a first web server 102 ₁ a web monitoring and control system 100 configuration.

FIG. 4 shows a state of request / data amount report processing by the first web server. The request / data amount reporting unit 142 shown in FIG. 2 performs new requests received by the client request receiving unit 132, their data amounts, and the maximum connection every time the predetermined time t ₁ elapses (step S201: Y). Whether or not the maximum number of connections set in the number storage unit 134 has been exceeded and the request for which processing has been newly completed are transmitted to the information collection unit 171 of the web system stabilization device 104 shown in FIG. 3 (step S202). Here the maximum connection number information of the presence or absence of excess of the maximum is set to the connection number storage unit 134, the first web server 102 ₁ is to receive the control of the web system stabilizer 104 regardless of the maximum number of connections If so, there is no need to send to this web system stabilization device 104.

Instead of performing the transmission of arbitrarily data to the information collection unit 171 of the first to n web server 102 ₁ to 102 _n web system stabilizer respectively 104 shown in FIG. 1, the information collecting unit 171 first Data may be collected by polling each of the _1st to nth web servers 102 _{1 to} 102 _n .

FIG. 5 shows a state of output processing of inspection result information in the inspection control unit of the web system stabilizing device. The inspection control unit 181 in the monitoring unit 180 illustrated in FIG. 3 grasps the number “n” of the web servers 102 _{1 to} 102 _n as management targets by referring to the statistics management database 173. At the start of treatment, the number "n" by the first to n parameters n to inspect the web server 102 ₁ to 102 _n are sequentially initialized to "1", the first web server 102 _first Data is read from the statistics management database 173 (step S222). Next, the value of the read system resource is compared with the upper limit value and the lower limit value as threshold values stored in the threshold information storage unit 182, and the system resource value is within a normal range not deviating from these values. It is determined whether or not the value is within the range (step S223).

If it is determined in this process that the range is normal (step S223: Y), it is not necessary to tune the state of the _first web server 1021. Therefore, in this case, the parameter n is incremented by “1” (step S224), and it is checked whether the parameter n after the addition exceeds the number “n” of the web servers 102 _{1 to} 102 _n (step S225). ). Assuming that the parameter n is a sufficiently large value, in this example, the parameter n is changed from the value “1” to the value “2”, which is less than the number “n” (step S225: N). Therefore, in this case it returns to the step S222, so that the second same processing for the web server 102 ₂ is started. When the parameter n becomes larger than the number “n” (step S225: Y), the process returns to step S221, and the state of the _first web server 1021 is checked again (return).

Meanwhile, if the first web server 102 _first system resource is judged to be outside the normal range in step S223 (N), the current first to m in a state of being constrained to a maximum number of connections the client 103 It is determined whether or not the number of connections _{1 to} 103 _m (FIG. 1) exceeds the maximum number of connections (step S226). In the web monitoring control system 100 of the present embodiment, if the first web server 102 ₁ connects the first to m-th clients 103 _{1 to} 103 _m within the maximum number of connections, the web system stabilization device 104 It is possible to perform a process of not receiving the control. Specifically, if the first web server 102 ₁ does not notify the web system stabilizing device 104 of the maximum number of connections in step S202 of FIG. 4 as described above, it is bound by the maximum number of connections. At this time, the web system stabilizing device 104 controls the number of connections only when the maximum number of connections is exceeded and the system resource is out of the normal range.

On the other hand, when the first web server 102 ₁ does not notify the web system stabilizing device 104 of the maximum number of connections in step S202 of FIG. 4 as described above, it is processed that it is not restricted by the maximum number of connections. . In this latter case, if a situation occurs in which the system resource is out of the normal range, the first web server is unconditional, that is, whether or not the maximum number of connections is exceeded. 102 ₁ is controlled.

In the present embodiment, as described above, the first web server 102 ₁ notifies the web system stabilization device 104 of the maximum number of connections in step S202 of FIG. Therefore, when the system resource is out of the normal range in step S223 (N), if it is determined that the number of connections is within the maximum number in the process of step S226 (Y), the process proceeds to step S224 as it is. Therefore, in this case, the control of the web system stabilizing device 104 for the first web server 102 ₁ is not performed.

On the other hand, even when the first web server 102 ₁ notifies the web system stabilization device 104 of the maximum number of connections, if the maximum number of connections is exceeded (step S226: N), the inspection result information 184 is The data is sent to the determination unit 190 (step S227), and the process proceeds to step S224. Therefore, the web system stabilizer 104 performs a first control web server 102 ₁ when it exceeds the maximum number of connections.

FIG. 6 shows a state of determination result transmission processing by the determination result execution unit. The determination result execution unit 192 illustrated in FIG. 3 waits for reception of the determination processing result 194 based on the transmission processing of the inspection result information 184 to the determination processing unit 191 in step S227 of FIG. 5 (step S241). Assume that the determination processing result 194 for the _first web server 102 ₁ is received (Y). In this case, the determination result execution unit 192 instructs the first web server 102 ₁ to increase or decrease the number of connections for the first to m-th clients 103 _{1 to} 103 _m (FIG. 1) (step S242). . Specifically, the first web server 102 ₁ is instructed to increase the number of connections by two clients at a time or to decrease the number of connections by one client.

FIG. 7 shows how the number of client connections is increased or decreased in the client connection processing unit of the first web server. The client connection processing unit 131 illustrated in FIG. 2 receives an instruction to increase or decrease the number of connections for the first to _m-th clients 103 _{1 to} 103 _m (FIG. 1) from the determination result execution unit 192 illustrated in FIG. Waiting to be performed (step S261). If there is this instruction (Y), it is determined whether the instruction is to increase or decrease the connection of the _first to mth clients 103 _{1 to} 103 _m (step S262).

If an increase is instructed (Y), it is checked whether or not connections exceeding the set maximum number of connections have been made (step S263). If there are currently fewer connections than the maximum number of connections (N), if there is a new connection request from any of the _first to m-th clients 103 _{1 to} 103 _m , the increase in the number of connections this time The connection will be made even if there is no instruction. Therefore, in this case, since it is not necessary to perform a special process for increasing the number of connections, the process returns to the first step S261 as it is (return).

On the other hand, if the number of connections that are greater than the maximum number of connections is currently made (step S263: Y), no new connection is made. Therefore, the allowable number of connections is increased within a range instructed to increase (step S264). Then, it is checked whether any of the _first to m-th clients 103 _{1 to} 103 _m is currently waiting for connection (step S265). If the connection is waiting (Y), the client 103 is newly connected within the allowable connection number range (step S266). Then, the process returns to the first step S261 (return). If there is no client 103 waiting for connection in step S265 (N), the process returns to the first step S261 without performing the process of step S266 (return).

In these cases, the connection state of the _first web server 102 ₁ is fed back to the web system stabilizing device 104. Therefore, if it is determined that there is still sufficient system resources at the time when this feedback is performed, an increase instruction is issued again.

On the other hand, if a decrease instruction is issued in step S262 (N), the number of connections of the first web server 102 _{1 to} the first to m-th clients 103 _{1 to} 103 _m is decreased by the specified number. The connection of the new client 103 is prohibited (step S267). In other words, the current connection is maintained as it is, and the number of connections is reduced to the target value by natural reduction due to completion of processing for the request and cancellation of the connection. As a result, there is no possibility that the processing for the connected client 103 is canceled. Since the web system stabilizer 104 performs the control of the web server 102 ₁ to 102 _n of the first to n with statistical methods, allowing such loose control.

As described above, according to the embodiment, since the web system stabilizing device 104 manages the resources of the _first to n-th web servers 102 _{1 to} 102 _n , these web servers 102 _{1 to} 102 _n have resources. It is possible to avoid a situation where resources are constrained by temporarily allocating a new connection to a short-running stage. Therefore, compared with the conventional method of stopping the service when resources are insufficient and manually changing the settings, the service does not stop and the web service is stable. There is an advantage that the cost required for this is not generated.

In addition, when there is a sufficient resource in a state where the maximum number of connections is performed, the number of connections can be increased by an instruction from the web system stabilization device 104, and thus the first to nth web servers 102 _1. Efficient utilization of ˜102 _n can be achieved. Of course, the web system stabilizing device 104 continues to grasp the resource state even when the number of connections is exceeded. Therefore, if a change occurs in the state of the resource thereafter, a process for degenerating the connection can be performed in accordance with the change, and the occurrence of a problem can be prevented.

  <Deformability of invention>

In the embodiment described above, the web system stabilization device 104 manages the system resources of the _first to n-th web servers 102 _{1 to} 102 _n , but is not limited thereto. For example, the first web server 102 ₁ and the second web server 102 ₂ may be web servers that publish the same content. In such a case, the first web server 102 ₁ and the second web server 102 ₂ are arranged in such a manner that a load balancer such as a load balancer is arranged at the preceding stage so that requests are evenly distributed to them. It is normal.

However, it is possible that its resources is constrained biased only request to the first web server 102 ₁ for some reason. In such a case, the web system stabilization device 104 issues a “decrease in the number of simultaneous connections” to the first web server 102 ₁ . The web system stabilizing device 104 determines whether or not to still give the “instruction to reduce the number of simultaneous connections” while viewing the result.

At this time, since the load balancer allocates the decrease of the first web server 102 ₁ to the _second web server 102 ₂ , the client 103 (FIG. 1) to be decreased is disconnected and an error occurs. It will never be. In this example, requests are concentrated on both the first web server 102 ₁ and the second web server 102 ₂ as web servers publishing the same content, and both of these exceed the limit of the number of connections. Even in such a case, if the request is temporarily held in the queues in these servers, an error indicating that the process cannot be performed can be avoided because the request is in a waiting state.

In addition, the monitoring unit 180 monitors the statistics management database 173 in the management unit 170, thereby specifying the possibility of affecting the response of the entire system including the _first to nth web servers 102 _{1 to} 102 _n. Elements of the web server 102 can be detected. For example, a process runaway occurs in a specific web server 102, a memory leak occurs, or one of the networks including the _first to nth web servers 102 _{1 to} 102 _n It may be detected by statistical processing of the web system stabilization device 104 that a failure has occurred in the section.

  In such a case, the web system stabilizing device 104 notifies the determination result receiving unit 143 of the corresponding web server 102 to that effect, forcibly stops the corresponding process, and restarts it. If an undefined process runs out of control, an alert can be given to the operator by notifying the corresponding web server 102 and the necessary operation can be performed.

  When a failure occurs in the network, if a request is assigned to the web server 102 that cannot be notified due to the failure, an error may occur because the request is not processed. Therefore, in this case, the web system stabilization device 104 stops the service of the corresponding web server 102 so that requests cannot be distributed.

Further, by distributing detailed statistical information using the statistical management database 173 to all or corresponding ones of the _first to nth web servers 102 _{1 to} 102 _n , measures necessary for these administrators are taken. It is also possible to Based on this, the administrator can examine the scale-up of the entire server system and the addition of web servers. Further, the customer's needs can be analyzed by checking the day and time of the request, the content update time, and the increase / decrease in the request.

1 is a system configuration diagram showing a configuration of a web monitoring control system in an embodiment of the present invention. It is a block diagram showing the outline | summary of the structure of the 1st web server in a present Example. It is a block diagram showing the outline | summary of the structure of the web system stabilization apparatus of a present Example. It is the flowchart showing the mode of the request data amount report process by the 1st web server of a present Example. It is the flowchart showing the mode of the output process of the test result information in the test | inspection control part of the web system stabilization apparatus of a present Example. It is a flowchart showing the mode of the determination result transmission process by the determination result execution part of a present Example. It is a flowchart showing the mode of the increase / decrease process of the number of connections of a client in a present Example.

Explanation of symbols

100 Web Monitoring Control System 101 Network 102 Web Server 103 Client 104 Web System Stabilization Device (Web Server Control Device)
124, 164 Basic hardware 131 Client connection processing unit 133 Processing result transmission unit 141 Client request processing unit 142 Request / data amount reporting unit 143 Determination result receiving unit 144 Blocking / expansion processing unit 171 Information collection unit 173 Statistics management database 181 Inspection Control unit 182 Threshold information storage unit 191 Judgment processing unit 192 Judgment result execution unit

Claims (6)

Connection means for connecting to the client, reporting means for sequentially reporting the content of the request from the client connected by this connection means to a specific destination, and notification reception for receiving notification about expansion / contraction of the number of client connections from the specific destination A plurality of web servers comprising: means; and connection control means for expanding or reducing the connection of the connection means according to the notification content received by the notification receiving means;
A monitoring unit that is connected to the plurality of web servers as the specific destination, receives the contents reported from the reporting unit, and monitors the status of the resource of each web server, and the monitoring results of the monitoring unit Determining means for determining whether or not the number of client connections is required for each of the web servers, and notifying the corresponding web server when the determining means determines that the number of client connections needs to be expanded or reduced A web monitoring control system comprising: a web server control device including a notification unit.   The monitoring means takes statistics of the contents reported from the reporting means, and based on the results of the statistics, the surplus of resources of each web server is predetermined in relation to the amount of data required by the client request. And the notification means notifies the instruction of expansion of the number of connections by the connection means when the surplus of the resource is larger than the range of the appropriate value, and the resource 2. The web monitoring control system according to claim 1, wherein when the surplus is less than the appropriate value range, an instruction to reduce the number of connections due to a decrease in the number of connections is notified.   The monitoring means is means for taking statistics of contents reported from the reporting means and monitoring uneven distribution of requests among web servers that process the same request based on the result of the statistics. Item 4. The web monitoring control system according to Item 1.   The monitoring means is means for taking statistics of contents reported from the reporting means, and detecting a failure of the plurality of web servers and a network failure related to these web servers based on a result of the statistics. The web monitoring and control system according to claim 1, wherein: Report receiving means connected to a plurality of web servers and receiving reports on the status of requests from clients to these web servers and the amount of data required for these requests;
Statistical means for taking statistics on the status of individual web servers and the status of the entire web server based on the reports received by the report receiving means;
Monitoring means for monitoring the fluctuation state of each web server resource using the statistics of the statistical means;
Expansion / reduction target determining means for determining a web server that requires expansion / reduction of the number of client connections from the monitoring result of the monitoring means,
A web server control apparatus comprising: an enlargement / reduction notification means for notifying the web server determined to require enlargement / reduction by the enlargement / reduction object determination means, for causing the number of connections to be enlarged / reduced. In a computer of a web server control device that is connected to a plurality of web servers and controls the number of clients connected to these web servers,
A report receiving process for receiving a report of a request status from a client to the plurality of web servers and a necessary amount of data accompanying the request;
Statistical processing for collecting statistics on the status of individual web servers and the status of these web servers as a whole based on the reports received in this report reception processing;
A monitoring process that monitors the fluctuation state of each web server resource using the statistics obtained in this statistical calculation process,
Expansion / contraction object determination processing for determining a web server that requires expansion / contraction of the number of client connections from the monitoring result of the monitoring processing;
A web server control program for executing an enlargement / reduction notification process for performing notification for causing the web server determined to require enlargement / reduction in the enlargement / reduction target determination process to enlarge / reduce the number of connections.

Images