JP2003162420A - Server apparatus and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow sharing appropriately processing abilities to adopt a plurality of requests for a plurality of data. <P>SOLUTION: A server apparatus 1 for receiving requests for a resource and transmitting responses to the requests comprises a resource storage part 11 for classifying the resource into a plurality of resource sections and storing therein, a connection number information acquiring part 12 for acquiring connection number information including information on a number of in-process requests, a determining part 13 for determining whether it should be performed for the process corresponding to a new request, based on the connection number information acquired by the acquiring part 12 and on the resource section, to which the resource instructed by the new request belongs and a processing part 14 processing transmission of a response related to the new request. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus suitable for being used for providing a hosting service.

[0002]

2. Description of the Related Art A so-called hosting service is a service for lending a server and an internet line to a user (website administrator) who desires to provide information on the internet. Generally, the disk space of the server device operated by the provider and the application service are lent. Such a hosting service is, so to speak, a server sale, and a plurality of websites by a plurality of users coexist on one server computer.

[0003]

However, when the access is concentrated on some of these websites, the processing capacity of the server is partially occupied by the websites. . Moreover, when the load on the server approaches the limit of the processing capacity of the server, it becomes difficult to access not only the website where access is concentrated but also other websites. That is, in a server provided for a hosting service, the processing capacity of the server is shared by a plurality of websites, but the distribution is not necessarily fair, and many access As a result, the website that accepts has taken away the communication connection function that should be distributed to other websites.

Of course, not only the example of the hosting service described above, but if access to a part of various data stored in the server device increases, a host desiring to access other data may access the data. It becomes difficult for the server device to respond to the request.

In view of the above problems, it is an object of the present invention to appropriately distribute the processing capacity of a server to meet a plurality of requests for a plurality of data.

[0006]

In order to solve the above-mentioned problems, a server device for receiving a request for a resource and transmitting a response for the request according to the present invention divides the resource into a plurality of resource divisions. A resource storage unit that classifies and stores, a connection number information acquisition unit that acquires connection number information including information regarding the number of requests being processed, and a connection number information acquisition unit that acquires a new request Based on the judgment made by the judgment unit, which judges whether to execute the process corresponding to the new request based on the connection number information and the resource division to which the resource designated by the new request belongs, based on the judgment made by the judgment unit. It is configured to include a processing unit that performs a process of transmitting a response related to the new request.

That is, when a new request is received,
Based on the current communication connection processing status of the server device and the resource classification to which the resource requested by the new request belongs, whether or not to execute the processing corresponding to the request is controlled. With such a configuration, the server functions as a server having means for appropriately distributing the communication connection capability to each resource section.

The resources referred to here are data stored in the server device, or programs or scripts stored in the server device and executed on the server device. Therefore, a request is data that is a request to send required data, or a request to execute a required program or script, and a response is a required data, a required program or script requested by the request. Is the data such as the execution result of.

The resource division is a logical concept for displaying individual groups when the resource group stored in the server device is classified into a plurality of groups, and is identified by an identifier such as a domain name. Examples include a website, a directory containing resources, and a node (node) having descendants in a tree-structured data structure. The individual resources themselves may correspond to the respective resource divisions on a one-to-one basis. Usually, an identifier for indicating a resource partition can distinguish one partition from another partition. Examples of identifiers that identify resource categories are domain names,
Examples include IP addresses, directory names, pointers to parent nodes, and so on. Then, the request provided to the server device usually includes an identifier for identifying the resource section to which the resource requested by the request belongs.

Further, the information on the number of requests being processed may be information on the number of all requests currently being processed by the server device. It may be related to the number of resources belonging to any one of the resource divisions or any two or more resource divisions. Then, both of them may be included in the connection number information. in addition,
These pieces of information are not limited to strictly indicating the number of requests being processed, and may be approximate values.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of the system according to this embodiment. In this system, a server device 1 and various information processing devices 2 are both connected to an information communication line network NT such as the Internet. And
The information processing device 2 can send a request to the server device 1 via the information communication network NT to try to access the resource stored in the server device 1.
The server device 1 that has received the request from the information processing device 2 has a function of transmitting an appropriate response to the information processing device 2 that has issued the request.

The system according to this embodiment will be described more specifically. The server device 1 in this system is
HTTP (HyperText Transfer P
The web server functions as a web server that accepts a request conforming to protocol and returns a response conforming to HTTP. The server device 1 stores various data that make up a plurality of websites. As an example, four websites W1 as shown in FIG.
It is assumed that the data forming W2, W3, and W4 is stored in the server device 1. At this time, from the information processing device 2, it seems that four server devices that provide the four websites W1, W2, W3, and W4 are connected to the information communication network NT. 4 websites W1, W2,
W3 and W4 are identified by different domain names DN. Normally, the HT transmitted from the information processing device 2
The TP request includes a URI (Uniform Resource Iden) of the resource to be accessed.
The domain name DN of the website to which the resource belongs is displayed together with the
OST header).

Incidentally, in constructing a plurality of websites on a single server, in addition to a method of identifying the websites by using a domain name as an identifier, different IP (Internet Protocol) is used for the plurality of websites.
ol) address, and different TCP (Transfer Contro) for multiple websites.
l Protocol) How to assign port number,
And so on. In these methods, the website can be identified using the IP address or port number as an identifier at the stage of establishing a connection using TCP, which is a lower layer protocol than HTTP. In the example shown in FIG. 2, the sites W1 and W2,
Site W3 and site W4 have the same IP address A
D is given, and these sites cannot be distinguished at the TCP / IP connection stage, but are identified by the domain name DN at the HTTP communication stage.

In the server device 1, for example, as shown in FIG. 3, a CPU 1a, a main storage device 1b, an auxiliary storage device 1c represented by a hard disk drive, a network interface card 1d, etc. are control devices, that is, a system controller 1e. , I / O controller 1f controls and operates in cooperation with each other. The network interface card 1d functions to connect to the information communication network NT via a router, a firewall, etc., not shown, and to send and receive data. System controller 1
e is interposed between the processor bus of the CPU 1a, the memory bus of the main memory 1b, and the like, and includes a PCI bridge and a memory controller. The I / O controller 1f controls data exchange between the CPU 1a and peripheral devices. Normally, a program to be executed by the CPU 1a is stored in the auxiliary storage device 1c, and when the program is executed, the program is read from the auxiliary storage device 1c into the main storage device 1b and decoded by the CPU 1a. Then, the above hardware resources are operated according to the program, and as shown in FIG. 4, at least the resource storage unit 11, the connection number information acquisition unit 12, and the determination unit 1
3. The function as the processing unit 14 is exerted.

The operation of each unit will be described. The resource storage unit 11 classifies various resources into a plurality of resource categories and stores them. In this embodiment, data such as text data and image data to be transmitted to the information processing device 2 for configuring a website, programs and scripts executed on the server device 1 are stored as resources. is doing. In addition, these resources
A plurality of categories, that is, a plurality of websites are classified and stored. There are various possible ways of associating each resource with the division of the website.
For example, there is a configuration in which a directory is provided for each website and resources are stored in each directory so that resources are classified by website. However, it is also possible to implement software etc. for setting the URI for indicating the resource independently of the directory structure in which the resource is stored. In such a case, the resource division is clearly indicated by the directory structure. Not expressed These phenomena are design matters of the server software and the file system and have no influence on the effectiveness of the present invention in any configuration.

The connection number information acquisition unit 12 acquires connection number information including information on the number of requests being processed. In the present embodiment, it is configured such that information regarding the number of requests being processed can be acquired in resource division units, that is, in website units. More specifically, information regarding the HTTP request currently being processed by the server device 1 is transferred to the main storage device 1b by the processing unit 14 described below.
Alternatively, it is appropriately stored in the auxiliary storage device 1c,
By referring to this, information such as the content of each request, the number of requests being processed for each website, the total number of requests being processed, etc. is acquired. in addition,
Information about the number of requests may be configured after weighting according to the attributes (type, data size, time stamp, etc.) of the resource requested by the request currently being processed. Even with the same single HTTP request, the time required for processing differs between downloading a text file and downloading a movie file (which is generally much larger than a text file). In such a case, a mode in which the movie file download request is counted as two text file download requests, rather than the same one request, may be considered. In addition, the execution of the script and the like are “heavy” processes as compared with the download of the data file, and thus it can be said that weighting is preferable when counting the number of requests.

When the judgment unit 13 receives a new request, the judgment unit 13 judges the new request based on the connection number information acquired by the connection number information acquisition unit 12 and the resource classification to which the resource designated by the new request belongs. It is determined whether or not the process corresponding to is executed. In this embodiment, the new HT transmitted by the information processing device 2 is transmitted.
The domain name is confirmed from the HOST header included in the TP request, the website to which the requested resource belongs is confirmed, and then it is determined whether or not the process corresponding to the request is executed.

The processing unit 14 performs a process of transmitting a response regarding the new request based on the judgment made by the judgment unit 13. That is, the judgment by the judgment unit 13 is
If the processing corresponds to the HTTP request, in other words, if the access to the resource requested by the request is permitted, the existing HTTP
HT as well as the server (or HTTP daemon)
Processing such as data transmission and program execution is performed by analyzing the request according to the TP and executing the method described in the request. Conversely, the determination unit 13
If the determination according to step 1 does not perform the process corresponding to the request, that is, if the access to the resource requested by the request is not permitted, the process of transmitting a response to reject the access is performed.

In addition to the above, the server device 1 is constructed so that it can also function as the connection control information storage unit 15, the time information acquisition unit 16, the error information generation unit 17, and the error information storage unit 18 described below. It is preferable.

The connection control information storage unit 15 includes the judgment unit 1
3 stores the connection control information including the judgment condition information CI which is the information on the condition for judging whether to execute the process corresponding to the new request. The connection control information may be artificially created or may be created by the server device 1 by referring to past communication connection logs and the like. A specific example of the connection control information will be described later.

The time information acquisition unit 16 acquires time information which is information on the current time. The method of acquiring the time information may be a method in which the server device 1 itself is equipped with a time measuring means and used, and the time information is acquired from an external information processing device equipped with the time measuring means via the information communication network NT. It may be done. This time information is also the judgment unit 13
Is used to determine whether or not to execute the process corresponding to the new request.

The error information generating section 17 includes the judging section 13
Determines that the processing corresponding to the new request is not to be executed, error information that is information regarding the fact that the determination is not performed is generated. The error information storage unit 18 also stores error information.

In the present embodiment, the function of each of these units is realized by executing, on a server computer, a configuration in which the module program according to the present invention is incorporated into existing HTTP server software.
It should be noted that the functions of the above-described units may be shared by a plurality of hardware, and these may cooperate to establish the server device according to the present embodiment.

Next, a specific example of the judgment condition when the judgment unit 13 judges whether or not to execute the process corresponding to the new request will be described. 5 and 6 show examples of the control connection information. The example shown in FIG. 5 is an example in which the upper limit of the number of connections for accepting and processing requests is set for each resource division, that is, the websites W1, W2, W3, and W4. In this example, when a new request is received, if the number of requests currently being processed has reached the upper limit for the website to which the resource requested by this request has reached, the processing corresponding to the request is not executed. The upper limit of the number of connections is given by multiplying the basic value common to each website by the weight (percentage) set for each website. Further, the upper limit value of the number of connections is set as the judgment condition information CI, and the judgment condition information CI is set stepwise according to the total number RN of requests currently processed by the server device 1 to reduce the load on the entire server. The connection control information is configured so that access restriction can be implemented correspondingly. In addition, since the load on the server often changes depending on the time period T, it is also preferable to set the connection control information for each time period T. In this case, the time information acquisition unit 16 described above functions effectively. For example, the website W4 at 11:00 am
When a request is newly transmitted to a resource belonging to the server device 1 and the number of requests being processed by the server device 1 is 40 or less, the number of processing requests for the resource device belonging to the website W4 is 20 or less. For example, the new request is accepted, the content is interpreted, and the HTTP server process is executed. Alternatively, when a request is newly transmitted to the resource belonging to the website W1 at midnight and the request processing number of the entire server device 1 exceeds 60, the request for the resource belonging to the website W1 is Only when the number of processes is less than 8, the new request is accepted and the corresponding process is executed.

In another example shown in FIG. 6, not the absolute value of the request processing number but the relative condition is set as the judgment condition information CI. That is, according to the total number RN of requests currently processed by the server device 1, access restriction is attempted in order from a website having a relatively large number of requests being processed. In this example, when the total number of requests processed by the server device 1 exceeds 30, new requests for resources that belong to the website having the largest number of requests are restricted in access. When the total number of requests exceeds 40, the number of requests is increased. , The new request for the resource belonging to the largest website as well as the second largest website restricts access, and the decision condition information CI indicates that the respective websites W1 and W are the resource divisions.
It relates to the result of comparing the numbers of requests being processed for resources belonging to 2, W3, and W4. Note that the judgment condition information CI is configured so that not only the simple magnitude relationship as shown in the example of FIG. 6 but also the result of the calculation processing including the ratio calculation can be compared. Good.

The operation of the server device 1 according to this embodiment will be described below with reference to the flowchart of FIG.

The server device 1 waits for transmission of a request from the information processing device 2 (step S1). When the request is received (step S2), the website to which the resource requested by the request belongs is confirmed (step S3), and the information on the number of requests currently processed by the server device 1 is included. Information on the number of connections is acquired (step S4). Although the specific content of the connection number information acquired in this connection number information acquisition step S4 also depends on the configuration of the connection restriction information, in the present embodiment, the total number of requests being processed and each website unit Gets connection count information about the number of requests being processed in. Subsequently, the connection restriction information is referred to (step S5), and it is determined whether or not the process according to the request is performed (step S6). Judgment step S6
The determination condition in is based on the connection control information as described above, for example. When it is determined that the process corresponding to the request is performed, the connection process as a normal HTTP server is executed (step S7). On the other hand, when it is determined that the process corresponding to the request is not performed, error information regarding the fact of the determination is generated and stored in the error information storage unit 18 (step S
Along with 8), an error response is carried out toward the information processing device 2 that has transmitted the request (step S9).

Here, an example of the error information and the error response will be shown. The error information is, for example, as shown in FIG. This is generated as a result of access restriction using the connection restriction information illustrated in FIG. At 10:46:58 am on October 2, 2001, the IP address zzz. zzz. zzz. It is described that the access restriction is executed for the request transmitted by the information processing device 2 to which zzz is added, and the domain name DN of the website to which the resource requested by the request belongs is C. org (ie,
The website W3 shown in FIG. 2) and the server device 1 as a whole are processing 32 requests, 20 of which are C.I. or
g (website W3), which is due to the fact that the upper limit 20 of the number of connections has been reached. Further, an error response response different from the original response corresponding to the request is transmitted to the information processing device 2. An example of the error response is shown in FIG. This is an HTML (HyperText Markup) that describes an error message.
Language file) (which is rendered by browser software installed in the information processing device 2). Of course, instead of such an HTML file, an HTTP status code (in this case,
The status code 503) and the like may be transmitted from the server device 1.

Therefore, according to the present embodiment, the server device 1 for receiving the request for the resource and transmitting the response for the request, and the resource storage unit 11 for storing the resource by classifying the resource into a plurality of resource sections. A connection number information acquisition unit 12 for acquiring connection number information including information on the number of requests being processed, and the connection number information acquisition unit 12 when a new request is received.
Web site W1, W2, W3, W to which the information on the number of connections acquired by the user and the resource designated by the new request belong
A determination unit 13 that determines whether or not to execute a process corresponding to the new request based on the classification of 4, and a process that transmits a response related to the new request based on the determination made by the determination unit 13. By including the processing unit 14 that performs the processing, the processing capacity of the server can be appropriately distributed to each of the websites W1, W2, W3, and W4.

In order to execute more detailed access control, the connection number information acquisition unit 12 selects one or more of the websites W1, W2, W3 and W4 among the number of requests being processed. It is desirable to have a function of acquiring the number-of-connections information including the information about the number of resources for resources belonging to.

As a concrete setting means of the judgment condition by the judgment unit 13, the connection control information including the judgment condition information CI which is the information regarding the condition for judging whether to execute the process corresponding to the new request. It is conceivable to store the information in the connection control information storage unit 15. Then, as shown in FIG. 5, the determination condition information CI is the upper limit of the number of requests being processed for resources belonging to one or any two or more of the websites W1, W2, W3, and W4. 6, or the determination condition information CI is a request for a resource belonging to any one or any two or more of the websites W1, W2, W3, W4 as shown in FIG. It can be said that it is preferable to adopt a configuration relating to the result of comparing the numbers of the processed items. In addition, if the connection control information associates the number RN of requests being processed with the determination condition information CI,
Access control can be performed according to the total load on the server device.

Furthermore, a time information acquisition unit 16 for acquiring time information, which is information on the current time, is further provided.
If the judgment unit 13 judges whether or not to execute the process corresponding to the new request after referring to the time information acquired by the time information acquisition unit 16, the load of the server It will be able to deal with changes over time.

The server device 1 generates an error information generating unit 17 for generating error information which is information related to the fact that the judging unit 13 judges not to execute the process corresponding to the new request, and the error information. If it further includes the error information storage unit 18 for storing, the fact that the access restriction is executed can be confirmed afterwards.

Information relating to the number of requests being processed included in the number-of-connections information or information relating to the number of requests being processed with respect to the resources belonging to any one or any two or more of the resource divisions is being processed. If the request is configured by multiplying the weight according to the attribute of the resource requested and counting the number,
Access control becomes more rational, and server device 1
It also leads to more efficient use.

In terms of information providing means in the information communication line network NT such as the Internet,
It is preferable that the resource division, which is a unit of access control of the server device 1, is a site unit. By the way, the site here means a website or FTP (File T
information transfer network N
It is the meaning of a set of data that exists above T.
Usually, one site has one domain name DN or 1
One IP address AD and the like are given, which makes it possible to distinguish one site from another site. However, domain name DN or IP address AD
Is not necessarily required to be used as a site identifier, and the present invention is not prevented from being used in a state where resources are divided into user ID units under a common domain name.

Further, the module program used to configure the server device according to the present embodiment causes the server computer to obtain the connection number information acquisition connection for acquiring at least the connection number information including the information regarding the number of requests being processed. Number information acquisition means, and when a new request is received, based on the connection number information acquired by the connection number information acquisition unit 12 and the resource division to which the resource designated by the new request belongs, The program may be a program that functions as a determination unit that determines whether to execute the corresponding process. With such a configuration, the server device 1 according to the present embodiment can be configured by being applied to a server computer incorporating existing server software. Further, in implementing the present invention, it is not necessary to manufacture dedicated hardware.

The present invention is not limited to the embodiment described in detail above. In particular, in the above-described embodiment, the server device 1 functions as an HTTP server,
Although the WW (World Wide Web) service is provided, the application of the server device 1 according to the present invention is not limited to this. Therefore, it is naturally possible to apply the present invention to a server that performs information communication using a protocol other than HTTP. Further, the division of resources, which is a unit of control of communication connection, is not limited to the above-mentioned units of websites W1, W2, W3, and W4.

Other than this, the specific configuration of each unit and the procedure of the processing shown in FIG. 7 are not limited to those in the above embodiment.
Various modifications can be made without departing from the spirit of the present invention.

[0039]

According to the present invention described in detail above, in a server device that receives and processes a plurality of requests for a plurality of resources, it is possible to appropriately distribute the processing capacity of the server for each resource division unit. Becomes

[Brief description of drawings]

FIG. 1 is a diagram showing an information communication system according to an embodiment of the present invention.

FIG. 2 is a diagram exemplifying a division of resources stored in the server device according to the embodiment.

FIG. 3 is an exemplary view showing contents of hardware resources of the server device according to the embodiment.

FIG. 4 is a functional block diagram of a server device.

FIG. 5 is a diagram showing an example of connection control information according to the same embodiment.

FIG. 6 is a diagram showing an example of connection control information according to the embodiment.

FIG. 7 is an exemplary flowchart showing a procedure of processing of the server device according to the embodiment.

FIG. 8 is a diagram showing an example of error information according to the embodiment.

FIG. 9 is a diagram illustrating an error response according to the same embodiment.

[Explanation of symbols]

1 ... Server device 11 ... Resource storage unit 12 ... Connection number information acquisition unit 13 ... Judgment part 14 ... Processing unit

Claims (12)

[Claims] 1. A server device that performs a process of receiving a request for a resource and transmitting a response related to the request, the resource storage unit storing the resource classified into a plurality of resource divisions, and the request being processed. A connection number information acquisition unit that acquires connection number information including information regarding the number, and a resource to which the connection number information acquired by the connection number information acquisition unit and the resource designated by the new request belong when a new request is received A determination unit that determines whether or not to perform a process corresponding to the new request based on the classification, and a processing unit that performs a process of transmitting a response regarding the new request based on the determination made by the determination unit. A server device comprising: 2. A server device for performing a process of receiving a request for a resource and transmitting a response related to the request, the resource storage part storing the resource classified into a plurality of resource divisions, and the request being processed. A connection number information acquisition unit that acquires connection number information including information regarding the number of resources for resources that belong to any one or any two or more of the resource divisions, and the connection number information when a new request is received. A determination unit that determines whether to execute a process corresponding to the new request based on the connection number information acquired by the acquisition unit and the resource classification to which the resource designated by the new request belongs, and the determination unit And a processing unit that performs processing of transmitting a response regarding the new request based on the determined determination. Over server apparatus. 3. A connection control information storage unit for storing connection control information including judgment condition information, which is information relating to a condition for judging whether or not to execute a process corresponding to the new request, and further comprising: 3. The unit determines whether or not to execute the process corresponding to the new request after referring to the connection control information stored in the connection control information storage unit. Server device. 4. The determination condition information relates to an upper limit of the number of requests being processed that are requests for resources belonging to any one or any two or more of the resource divisions. The server device described. 5. The determination condition information relates to a result of comparing the numbers of requests being processed for resources belonging to any one or any two or more of the resource divisions. The server device according to item 3. 6. The server device according to claim 3, wherein the connection control information is such that the number of requests being processed and the determination condition information are associated with each other. 7. The new request further comprises a time information acquisition unit for acquiring time information which is information on the current time, the judgment unit referring to the time information acquired by the time information acquisition unit. The server device according to claim 1, wherein it is determined whether or not the process corresponding to is executed. 8. An error information generation unit that, when the determination unit determines that the process corresponding to the new request is not executed, generates error information that is information regarding the fact that the determination is not possible. The server device according to claim 1, further comprising: an error information storage unit that stores the error information. 9. Information relating to the number of requests being processed included in the number-of-connections information or information relating to the number of requests being processed with respect to a resource belonging to any one or any two or more of the resource divisions, 9. The server device according to claim 1, wherein the server device according to any one of claims 1 to 8 is configured by multiplying a weight according to an attribute of a resource requested by a request being processed and then counting the number. 10. The server device according to claim 1, wherein the resource division is on a site-by-site basis. 11. A connection number information acquisition connection used to configure the server device according to claim 1, wherein the computer acquires at least connection number information including information regarding the number of requests being processed. Number information acquisition means,
Also, when a new request is received, a process corresponding to the new request is executed based on the connection number information acquired by the connection number information acquisition unit and the resource division to which the resource designated by the new request belongs. A program that functions as a judgment means for judging whether or not it is. 12. The server device according to claim 2, wherein the computer is at least one of the resource divisions among the number of requests being processed, or any two or more of them. Connection number information acquisition means for acquiring connection number information including information on the number of resources to which the resource belongs, and when receiving a new request, the connection number information acquired by the connection number information acquisition unit and the new A program for functioning as a determination unit that determines whether or not to execute the process corresponding to the new request, based on the resource classification to which the resource indicated by the request belongs.