JP2002073404A - Access method for www server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an access method that increases a possibility of fast acquisition for latest page data by clients and reduces loads of a Proxy server. SOLUTION: The access method provides two relay servers 108-109 between several clients 101-106 and a Proxy server 107. The clients 101-106 access separately each relay server 108-109. The relay servers 108-109 calculate an interval of an update on each page data being frequently requested, which indicates how long the interval is suitable for the update on the page data on a basis of the information to show a past update frequency. The relay servers request a WWW server page access to the Proxy server 107 by the updated interval of these page data and store the page data of a WWW server 200 after receiving them from the Proxy server 107.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local network (LAN (Local Area Network)).
k))) (client PC (P
personal Computer)) WWW (Wo)
The present invention relates to a WWW server access method for realizing access (page access) to page data (data identified by a page address) on a WWW server by a browser (rld Wide Web).

[0002]

2. Description of the Related Art Conventionally, in a client / server system realized using a network such as the Internet, when a client WWW browser accesses page data of a WWW server, a proxy server is used. However, the page data of the page once accessed is held in the proxy server.
For example, JP-A-11-143759 and JP-A-200
No. 0-076162 and JP-A-11-3452.
No. 44 discloses a technique using such a proxy server (“proxy server cache system”,
"Preprocessing device of reception processing server" and "Similar information extraction and display method and system") are introduced.

[0003] According to the technique using such a proxy server, the page data of the page once accessed is stored in the proxy server. Therefore, when a client on the local network accesses the same page, Can obtain the page data held in the proxy server without accessing the WWW server, so that the access response can be made faster.

[0004] However, conventionally, there has been no idea that a relay server is further provided between the proxy server and the client.

[0005]

SUMMARY OF THE INVENTION The above-mentioned conventional WWW
In the server access method, a proxy server is provided to speed up an access response. However, the following problems still occur.

The first problem is that data (page data) is not stored in the proxy server, or that the stored data is old (when a data update request is received from a client and the data has already been updated). Does not always hold the latest data of the page requested to be accessed by the proxy server, so the proxy server needs to access the WWW server. This means that it takes a long time.

A second problem is that the greater the number of clients, the greater the load on the proxy server, and the slower the access response.

In view of the above, it is an object of the present invention to provide several relay servers between a proxy server and a plurality of clients so that a plurality of clients can access each relay server in a distributed manner. For clients, it is more likely that the latest page data is obtained quickly (higher processing speed can be realized), and for the proxy server, the load can be reduced due to the reduced number of accesses to itself. It is to provide a server access method.

In other words, according to the present invention, the relay server determines whether each page for which a connection request (access request) has been made from a client has been made based on the frequency of past page data updates by a plurality of clients to be connected. Calculate how often the page data should be updated and send WW to the proxy server at each interval.
A W server page access request (an access request that specifies the page address of the page to obtain the page data on the WWW server) is made. Further, in accordance with the WWW server page access request, the proxy server accesses the WWW server by specifying the requested page address (page access), and acquires the latest page data at that time. Further, the relay server sets the page data acquired by the proxy server (page data updated to the latest one).
(Relay server updates its own page data so that it becomes new page data whenever possible). By such a series of processes, it is possible to improve the characteristics and performance as described above (quickly supply the latest page data to the client and reduce the load on the proxy server).

[0010] Patent documents relating to the prior art for the WWW server access method of the present invention include, in addition to the above-mentioned publications, a WWW browser of a client.
There is “Japanese Patent Laid-Open No. 2000-010947” which is similar to the present invention in that efficiency of access to a WW server is considered.

However, the technology described in the above-mentioned publication (“server information sharing method and client server system to which the method is applied”) is described in a and b below.
The configuration and effects are different from those of the present invention.

A. In terms of configuration, the “proxy server” in the present invention corresponds to the “word-of-mouth server” in the invention described in the above-mentioned publication, and the “client” in the present invention corresponds to the “client” in the above-mentioned publication. In this regard, the two inventions have similarities. However, the “relay server” in the present invention is a server that connects a plurality of client PCs and a proxy server via a network, and is not mentioned in the above publication. In view of the fact that the existence of the relay server is the main point in the configuration of the present invention, it can be said that the above publication and the present invention have a clear difference in the configuration.

B. The access request from the “client agent” in the above publication increases the load on the word-of-mouth server as the number of clients increases, and the effect of reducing the load on the word-of-mouth server cannot be obtained at all. On the other hand, in the present invention, the proxy server does not respond to access requests from all clients on the network, but accesses the relay server from a plurality of clients to which the relay server is connected for a certain period of time in the past.
Since the process of calculating the page data update interval based on the update frequency and issuing a WWW server page access request to the proxy server at each interval is performed, access to the proxy server is only from several relay servers,
There is an effect that the load on the proxy server can be reduced.

[0014]

According to the WWW server access method of the present invention, a plurality of clients and a proxy server are connected on a local network (LAN, etc.) connected to a WWW server via a network (Internet, etc.). For each of the plurality of relay servers provided in the server, the plurality of clients that access in a distributed manner and the page access history information are referred to, and the page address, access time, and “ Page access information creating means in the relay server for creating page access information having "information indicating whether or not page data has been updated by the page access"; and page access information created by the page access information creating means. And the page address is the same. Then, the update time group indicating the time group at which the page access was performed when the page data is updated by the page access is detected, and at what interval the page data should be updated based on the update time group Calculating a page data update interval indicating a page address and a page data update table in which a page address and a page data update interval are set for each page that has been frequently accessed in the past. Means for creating a table,
With reference to the page data update table created by the page data update table creating means, for each page for which a client has frequently requested access in the past, the proxy server is provided at regular intervals indicated by the page data update interval. Page access request means in the relay server for making a WWW server page access request to the server, and WWW from the page access request means
Based on the server page access request, a WWW server page access for obtaining the latest page data is performed by specifying a page address on the WWW server specified by the WWW server page access request, and the WW
Page access means in the proxy server for transmitting page data obtained by W server page access to the relay server; and receiving and holding the page data obtained from the WWW server by the page access means from the proxy server. And a page data holding unit in the relay server for storing.

Further, according to the WWW server access method of the present invention, each of a plurality of relay servers provided between a plurality of clients and a proxy server in a local network connected to a WWW server via a network. A plurality of clients that are accessed in a distributed manner and a page address on the WWW server specified by the WWW server page access request based on the WWW server page access request from the relay server. The WWW server page access for obtaining the page data of the proxy server, and the page access means in the proxy server for transmitting the page data obtained by the WWW server page access to the relay server. Relay server, page access Access information for creating page access information having a page address relating to each page access from a client, an access time, and "information indicating whether or not page data has been updated by the page access" with reference to the document history information Creation means,
With reference to the page access information created by the page access information creating means, an update time group indicating the time group of the page access where the page address is the same and the page data is updated by the page access is detected. By calculating the page data update interval indicating how often the page data should be updated based on the update time group, the page address and the page for each page that has been frequently accessed in the past are calculated. A page data update table creating means for creating a page data update table in which a data update interval is set, and referring to the page data update table created by the page data update table creating means, the client requests frequently access requests in the past. About each page that was Page access request means for performing the WWW server page access request to the proxy server at fixed time intervals indicated by the page data update interval,
Further, the present invention can be realized as a recording medium recording a program for functioning as page data holding means for receiving and holding page data obtained from the WWW server by the page access means from the proxy server. .

[0016] The WWW server access method of the present invention is more generally applied to a network provided between a plurality of clients and a proxy server in a local network connected to the WWW server via a network. For each of the relay servers, the plurality of clients to access in a distributed manner, for each page that has been frequently accessed in the past from the client, based on information indicating the frequency of page data update in the past, A page data update interval indicating at what interval the page data should be updated is calculated, a WWW server page access request is made to the proxy server at each page data update interval, and the WWW is sent by the proxy server. Receiving the page data obtained from the server To obtain the latest page data by specifying the page address on the WWW server specified by the WWW server page access request based on the relay server held and the WWW server page access request from the relay server , And the proxy server that transmits the page data acquired by the WWW server page access to the relay server.

Further, according to the WWW server access method of the present invention, each of a plurality of relay servers provided between a plurality of clients and a proxy server in a local network connected to a WWW server via a network. In response to this, based on the WWW server page access request from the relay server and the WWW server page access request from the relay server, a page address on the WWW server specified by the WWW server page access request is specified, and the latest WW to get page data
Assuming that there is the proxy server that performs W server page access and transmits the page data acquired by the WWW server page access to the relay server, the relay server is configured to send an access request frequently from a client in the past. For each existing page, a page data update interval indicating how often the page data should be updated is calculated based on the information indicating the frequency of page data update in the past, and for each page data update interval, A WWW server page access request is made to the proxy server, and the program is realized as a recording medium recording a program for causing the proxy server to function to receive and hold page data acquired from the WWW server. It is also possible.

[0018]

Next, the present invention will be described in detail with reference to the drawings.

(1) First Embodiment FIG. 1 is a block diagram showing a configuration of a WWW server access method according to a first embodiment of the present invention.

Referring to FIG. 1, W according to the present embodiment
The WW server access method uses the local network 10
0, WWW server 200, and Internet 300
(It can also be realized by another network such as an intranet).

The local network 100 includes clients 101 to 106, a proxy server 107, and relay servers 108 to 109. It should be noted that the numbers of clients and relay servers in FIG. 1 are merely examples. However, in any case, the number of clients is larger than the number of relay servers, and one or more clients are connected to each relay server in a distributed manner.

Further, the WWW server 200 has page data identified by a page address.

As shown in FIG. 1, in the local network 100, clients 101 to 104 access (connect) to the relay server 108, and
5 to 106 access the relay server 109. In this way, the plurality of clients 101 to 106 are accessing the respective relay servers 108 to 109 in a distributed manner.

The relay server 108 has page access history information 30 indicating the past page access history of each of the clients 101 to 104 connected thereto.
A page access information creating unit 110 for creating the page access information 10 (see FIG. 4) by referring to the page access history information 30; an access time group detecting unit 111;
The page data update table 20 includes an update time group detection unit 112 and a page data update interval calculation unit 113.
(See FIG. 4) A page data update table creating means 114 for creating a page access request to the proxy server 107 with reference to the page data update table 20 (to obtain page data on the WWW server 200, Page access requesting means 115 for making an access request by designating the page address of
A page data holding unit 116 receives and holds the page data obtained from the WWW server 200 by the page access unit 117 in the proxy server 107 from the proxy server 107.

Although not shown, the relay server 10
9 includes the same units as the relay server 108.

The proxy server 107 accesses the WWW server 200 based on the WWW server page access request from the page access request unit 115 (the page to the WWW server 200 based on the page address specified by the WWW server page access request). Access), and the page data identified by the relevant page address (the latest page data at that time)
From the WWW server 200.

FIG. 2 is a flowchart showing a page data update table creation process in the WWW server access method according to the present embodiment. This processing includes a page access information creation step A1, an identical page address entry group search step A2, an identical page address entry group discovery determination step A3, an identical page address table setting step A4, an identical page address access time group detection / A table setting step A5, a same page address update time group detection / table setting step A6, a page data update interval calculation / table setting step A7,
It comprises a next page address transition step A8.

FIG. 3 is a flowchart showing page data update processing in the WWW server access method according to the present embodiment. This processing includes a WWW server page access request step B1, a WWW server page access step B2, and an updated page data holding step B3.

FIG. 4 shows the structure of the page access information 10 and the page data update table 20 (page access information creation means 110, access time group detection means 111, update time group detection means 112, page data update interval calculation means 113, Page data update table creation means 1
FIG. 14 is a block diagram showing an example of the processing of FIG.

Referring to FIG. 4, page access information 1
0 in the page address field 11
, Access time field 12 and update flag 13
(A flag indicating whether the page data has been updated by the page access).

Each entry in the page data update table 20 includes a page address field 21, an access time group field 22, and an update time group field 2
3 and a page data update interval field 24 as elements.

Here, some means in FIG. 1 will be described with reference to FIG.

The page access information creating means 110 refers to the page access history information 30 and
The information (page address, access time, and “whether the page data was updated by the page access”) regarding each page access in the past (during a certain period when the history information in the page access history information 30 was collected) from 1 to 104 Is generated in each entry (an entry having a page address field 11, an access time field 12, and an update flag 13 as elements).

The access time group detecting means 111 refers to the page access information 10, extracts an entry group having the same page address in the page address field 11, and
The access time field 12 in the entry group is searched to detect a time group (access time group) at which page access was performed to the same page address as information indicating the frequency of page access in the past.

The update time group detecting means 112 refers to the page access information 10 and
Among the entries having the same page address (entries extracted by the access time group detecting means 111), the update flag 13 becomes true (information indicating that the page data has been updated by the page access). A group of entries is extracted, the access time field 12 in the group of entries is searched, and a time group (update time group) at which page data is updated for a page having the same page address is detected.

The page data update interval calculating means 113
Update time group (update time group detection means 1) indicating the frequency of update to page data of the same page address in the past
12 based on the information detected by the client 1).
01 to 104 (each client connected to the relay server 108), with the goal of always providing the latest page data when there is an access request, periodically updating the page data held by itself at what intervals. A page data update interval indicating whether to perform the update is calculated.

Page data update table creating means 114
Creates the page data update table 20 by the processing of the access time group detection means 111, the update time group detection means 112, and the page data update interval calculation means 113 as described above.

Next, the overall operation of the WWW server access method according to the present embodiment configured as described above will be described in detail with reference to FIGS.

As described above, in the local network 100 shown in FIG. 1, each client 101-104 or each client 105-10
No. 6 requests the relay server 108 or the relay server 109 to access page data by designating a page address.

First, the operation during the page data update table creation processing will be described (see FIG. 2).

Each relay server (here, the relay server 10
8), the page data update table 20 is created in the following manner at fixed time intervals (for example, every time a certain number of page accesses are accumulated and the page access history information 30 is updated). I do.

First, the page access information creating means 110 in the relay server 108
To the clients 101 to 104 (relay server 1
For each page for which an access request has been made from each client connected to page 08, information indicating whether the page address, access time, and page data have been updated are stored in the page in each entry in the page access information 10. Address field 11 (here, page address fields 11-1, 11-2, 11-3, 11-
,...), Access time field 12 (here, access time fields 12-1, 12-2, 12).
-3, 12-4,...) And the update flag 13
(Here, the update flags 13-1, 13-2, 13-
3, 13-4,...), And creates page access information 10 having the respective entries (step A).
1).

Next, the page data update table creation means 114 uses the access time group detection means 111, the update time group detection means 112, and the page data update interval calculation means 113 as shown in a to c below. A page data update table 20 is created.

A. After creating the page access information 10 in step A1, the access time group detecting unit 111 refers to the page address field 11 in each entry in the page access information 10, and sets the same page address for a certain page address. An entry group having the page address field 11 is searched (step A2), and it is determined whether an entry group having the same page address (two or more entries in total) has been found (step A3).

If the access time group detecting means 111 determines in step A3 that "an entry group having the same page address has been found", that is, if a certain page address is frequently (here, "two or more") pages If it is found that there is an access (access request), the page address is stored in the page data update table 2
Page address field 21 in an entry in 0
(Step A4).

Further, access time group detecting means 111
Detects the contents of the access time field 12 in a plurality of entries in the page access information 10 in which the page address is set as an access time group, and detects the access time group in the entry in the page data update table 20. Is set in the access time group field 22 (step A5).

For example, page access information 1 shown in FIG.
A search is made for the same page address as the page address in the page address field 11-1 in 0. If the page addresses in the page address fields 11-2 and 11-4 are the same page address, the corresponding page address is searched. Access time fields 12-1, 12-2, and 12, which are times at which page access was performed,
-4 is detected as an access time group, and the relevant page address is stored in the page data update table 20 shown in FIG.
, And the access time group is set in the access time group field 22-1.

B. The update time group detecting means 112 outputs the page access information 10 for which the same page address is set.
From the entry group (the entry group in which the access time group was detected in step A5), an entry group in which the update flag 13 is true is extracted as information indicating the frequency of page data update in the past. , The content of the access time field 12 in the entry group is detected as an update time group indicating a “time group in which the page data is updated”, and the update time group is detected in the entry in the page data update table 20. Update time group field 23
(Step A6).

For example, in the case of the above example (the page address field 11- in the page access information 10 shown in FIG. 4).
1, 11-2, and 11-4 have the same page address), the update flags 13-1, 13-
When the update flags 13-1 and 13-4 are true among 2, 2, and 13-4, the contents of the access time fields 12-1 and 12-4 are detected as an update time group, and the update time group is detected. Is set in the update time group field 23-1 in the page data update table 20 shown in FIG.

C. Page data update interval calculation means 113
Is based on the update time group detected by the update time group detection unit 112 (information indicating the past update frequency of the page data for each page).
With the goal of the relay server 108 always providing the latest page data when there is an access request in the future from ".about.104,"
The page data update interval, which is information indicating whether to update the page data in the relay server 108, is calculated, and the page data update interval is set to the page data update interval in the entry in the page data update table 20. It is set in the field 24 (step A7).

As described above, the page data update table creating means 114 sets the page address of the page frequently accessed in the past (here, the page address of the page accessed two or more times), The time group, the update time group, and the page data update interval are stored in the page address field 21, the access time group field 22, the update time group field 23, and the page data update interval field 24 in each entry in the page data update table 20. Then, the page data update table 20 is created.

For example, when creating the page data update table 20 shown in FIG.
Information is set in the entry having the 1-1, access time group field 22-1, update time group field 23-1, and page data update interval field 24-1 as elements as described above.

When the processing of step A7 is completed, the page data update table creating means 114 shifts the control to the processing of step A2 so as to perform the processing and determination of step A2 and subsequent steps for the next page address (step A2). A8). Thus, for example, the same processing as in the above example is performed for each entry having the page address fields 21-2, 21-3, and 21-4 as elements in the page data update table 20 in FIG.

On the other hand, the access time group detecting means 111
If it is determined in step A3 that "the entry group having the same page address cannot be found", the control is immediately transferred to perform the processing and determination in step A2 and subsequent steps for the next page address (step A8). Thus, a page that has not been frequently accessed in the past (“a page that has been accessed only once” in the present embodiment) is not subjected to the page data update processing illustrated in FIG. be able to.

The page data update table creation means 114 detects and calculates the value of each element for all page addresses, and then sets the values of the page data update table 20 collectively, thereby obtaining the page data update table 20. Can also be realized.

Second, the operation during the page data update processing will be described (see FIG. 3).

Each relay server (here, the relay server 10
No. 8).
For the page of the page address in the page address field 21 in each entry on the page data update table 20 held by itself, the proxy server 107 sends the page data update interval in the page data update interval field 24 in the entry to the proxy server 107. In response, a WWW server page access request (WWW
An access request for acquiring page data on the server 200 is performed (step B1).

For example, the page access requesting means 115 in the relay server 108 sets the page data update interval field 24-1 for the page of the page address in the page address field 21-1 in the page data update table 20 shown in FIG. At every page data update interval,
A WWW server page access request specifying the page address in the page address field 21-1 is made to the proxy server 107.

The page access unit 117 in the proxy server 107 receives the WWW server page access request issued from the relay server 108 or the relay server 109, and is identified by the page address specified in the WWW server page access request. A page access to a page on the WWW server 200 (WWW server page access) is performed, and page data updated as the latest one at that time is acquired from the WWW server 200 (step B2).

Each relay server (here, relay server 10
8) (in step B2), the page data holding means 116 in step B2
The page data acquired from the server 200 is received from the proxy server 107, and the page data (updated page data) is held (step B3).

As described above, by providing the relay server 108 and the relay server 109, the client 10
When the clients 1 to 104 and the clients 105 to 106 make an access request for each page, updated page data can be quickly obtained. Further, since the number of accesses to the proxy server 107 decreases, the load on the proxy server 107 also decreases.

(2) Modifications of First Embodiment The following modifications can be considered for the WWW server access method according to the first embodiment.

In the WWW server access method according to the first embodiment, the condition for setting a page address in the page data update table 20 is “a fixed period in the past (history information accumulation period in the page access history information 30)”. In this example, the number of times that an access request (page access) is made to the page address is two or more times. " That is, the criterion for determining whether or not an access request has been frequently made in the past is “2 in the past.
Whether or not there has been an access request more than once. "

However, the criterion of “frequently” can be set to “n (n is an integer of 3 or more) or more” instead of “2 or more”.

In this case, the access time group detection means 111 in the page data update table creation means 114
In the determination of step A3 in FIG. 2, it is determined whether or not a total of n or more entries with the same page address have been found.
The determination of s / no will be performed.

(3) Second Embodiment FIG. 5 is a block diagram showing a configuration of a WWW server access method according to a second embodiment of the present invention.

Referring to FIG. 5, the WWW server access method according to the second embodiment of the present invention is different from the WWW server access method according to the first embodiment shown in FIG. The difference is that a recording medium 500 on which a processing program is recorded is provided. This recording medium 500 may be a magnetic disk, a semiconductor memory, or another recording medium.

The WWW server access processing program is as follows:
It is read from the recording medium 500 by the relay server 108 and the relay server 109 (hereinafter, the relay server 108 will be described as a representative), and the operation of the relay server 108 is described in the page access information 10 and the page data update table 2.
0, page access history information 30, page access information creation means 110, access time group detection means 111, update time group detection means 112, page data update table creation means 114 including page data update interval calculation means 113, page access request Means 115 and page data holding means 116. Relay server 108 controlled by WWW server access processing program
(Page access information creation means 110, access time group detection means 111, update time group detection means 11 based on the existence of page access information 10, page data update table 20, and page access history information 30)
2, a page data update table creating means 114 including a page data update interval calculating means 113, a page access requesting means 115, and a page data holding means 1
16) is exactly the same as the operation of the relay server 108 in the first embodiment, and a detailed description thereof will be omitted.

It is needless to say that the modification described in the above (2) can be applied to the present embodiment.

[0070]

As described above, according to the present invention,
By performing the following processes a to e, etc., for the client, the effect is that "when an access request is made to each page, the possibility that the updated latest page data can be obtained immediately increases." And the effect that the load is reduced due to the decrease in the number of accesses to the proxy server is generated for the proxy server.

A. In a client-server system, several relay servers are provided between a plurality of clients and a proxy server.

B. Based on the page access history information, for each page address, the time interval (page data update interval) at which the relay server should update the page data from the frequency (interval) at which the client accessed and updated the page data of the page in the past. ) Is calculated.

C. The relay server issues a WWW server page access request to the proxy server at regular time intervals (page data update intervals) calculated in b above.

D. The proxy server is the WWW of c above.
WW for the page requested to access the server page
The W server page is accessed, and “updated page data” is obtained from the WWW server.

E. The relay server receives the “updated page data” of d from the proxy server and holds it.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a WWW server access method according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a page data update table creation process in the WWW server access method shown in FIG.

FIG. 3 is a flowchart showing a page data update process in the WWW server access method shown in FIG.

FIG. 4 is a block diagram showing a configuration of page access information and a page data update table in FIG. 1;

FIG. 5 is a block diagram showing a configuration of a WWW server access method according to a second embodiment of the present invention.

[Explanation of symbols]

10 Page access information 11, 11-1 to 11-4 Page address field 12, 12-1 to 12-4 Access time field 13, 13-1 to 13-4 Update flag 20 Page data update table 21, 21-1 to 1 21-4 Page address field 22, 22-1 to 22-4 Access time group field 23, 23-1 to 23-4 Update time group field 24, 24-1 to 24-4 Page data update interval field 30 Page access history Information 100 local network 101 to 106 client 107 proxy server 108 to 109 relay server 110 page access information creation unit 111 access time group detection unit 112 update time group detection unit 113 page data update interval calculation unit 114 page data update table Creation means 115 Page access request means 116 Page data holding means 117 Page access means 200 WWW server 300 Internet 500 Recording medium

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G06F 17/30 240 G06F 17/30 240A

Claims (8)

[Claims] In a local network connected to a WWW server via a network, distributed access is made to each of several relay servers provided between a plurality of clients and a proxy server. For each of the plurality of clients and each page for which the client has frequently requested access in the past, the table indicates at what interval the page data should be updated based on information indicating the frequency of page data update in the past. A page data update interval is calculated, and WWW is sent to the proxy server at each page data update interval.
Making a server page access request, the relay server receiving and holding the page data obtained from the WWW server by the proxy server, based on a WWW server page access request from the relay server,
WW specified in the WWW server page access request
A proxy server that performs a WWW server page access to acquire the latest page data by designating a page address on the W server and transmits the page data acquired by the WWW server page access to the relay server A WWW server access method characterized by the following. 2. In a local network connected to a WWW server via a network, distributed access is made to each of several relay servers provided between a plurality of clients and a proxy server. A page access having a page address, an access time, and "information indicating whether or not page data has been updated by the page access" with reference to the plurality of clients and the page access history information for each page access from the client. The page address is the same and the page data is updated by the page access by referring to the page access information creating means in the relay server for creating information and the page access information created by the page access information creating means. The page is accessed By detecting an update time group indicating a time group that has been updated and calculating a page data update interval indicating how often the page data should be updated based on the update time group, an access request frequently performed in the past is obtained. Page data update table creating means in the relay server for creating a page data update table in which a page address and a page data update interval are set for each of the pages having the error, and page data created by the page data update table creating means The relay server that makes a WWW server page access request to the proxy server at regular intervals indicated by the page data update interval for each page to which a client has frequently requested access in the past with reference to an update table Means for requesting page access within Performing a WWW server page access for acquiring the latest page data by specifying a page address on the WWW server specified by the WWW server page access request based on the WWW server page access request from the page access requesting means; A page access unit in the proxy server for transmitting page data obtained by the WWW server page access to the relay server; and receiving and holding page data obtained from the WWW server by the page access unit from the proxy server. And a page data holding unit in the relay server for storing. 3. A page access information having an entry having a page address field, an access time field, and an update flag as elements, and a page address field, an access time group field, an update time group field, and a page data update interval field. A page data update table having an entry in the element,
Referring to a page address field and an access time field in the page access information created by the page access information creating means, an access time group for the same page address is detected as information indicating the frequency of page access in the past. An access time group detecting means in a page data update table creating means for setting a page address and the access time group in a page address field and an access time group field in the page data update table; and an update flag in the page access information. Referring to the information indicating the frequency of updating the page data in the past, an update time group indicating the time at which the page data was updated is detected from among the access time groups detected by the access time group detecting means. And the said Update time group detection means in the page data update table creation means for setting a new time group in the update time group field in the page data update table, and update time for each page address detected by the update time group detection means Based on the group, a page data update interval indicating how often the page data of the page of each page address should be updated is calculated, and the page data update interval is determined by the page data update in the page data update table. 3. The WWW server access method according to claim 2, further comprising: a page data update interval calculation unit in said page data update table creation unit that sets the interval field. 4. The method according to claim 1, wherein “each page that has been frequently accessed in the past” means “each page that has been accessed twice or more in the past”. The WWW server access method according to claim 3. 5. In a local network connected to a WWW server via a network, distributed access is made to each of several relay servers provided between a plurality of clients and a proxy server. The plurality of clients and the WW from the relay server
Based on the W server page access request, a WWW server page access for obtaining the latest page data is performed by specifying a page address on the WWW server specified by the WWW server page access request, and the WWW
Assuming that there is the proxy server that transmits page data acquired by server page access to the relay server, the relay server is used to determine whether or not each page that has been frequently accessed by a client in the past is a page in the past. Based on the information indicating the frequency of data update, a page data update interval indicating how often the page data should be updated is calculated, and the WWW server page is sent to the proxy server for each page data update interval. A recording medium recording a program for making an access request and causing the proxy server to receive and hold page data acquired from the WWW server. 6. In a local network connected to a WWW server via a network, distributed access is made to each of several relay servers provided between a plurality of clients and a proxy server. The plurality of clients and the WW from the relay server
Based on the W server page access request, a WWW server page access for obtaining the latest page data is performed by specifying a page address on the WWW server specified by the WWW server page access request, and the W
Assuming that there is a page access means in the proxy server that transmits page data obtained by WW server page access to the relay server, the relay server refers to page access history information, and Page access information creating means for creating page access information having a page address related to page access, access time, and "information indicating whether or not page data has been updated by the page access", created by the page access information creating means With reference to the accessed page access information, an update time group indicating a time group at which the page access is performed when the page address is the same and the page data is updated by the page access is detected, and based on the update time group, How often By calculating a page data update interval indicating whether or not the page data should be updated, a page data update table in which a page address and a page data update interval are set for each page that has been frequently accessed in the past is created. With reference to the page data update table creation means and the page data update table created by the page data update table creation means, each page to which a client has frequently requested access in the past is indicated by the page data update interval. Page access requesting means for making a WWW server page access request to the proxy server at predetermined time intervals, and receiving and holding page data obtained from the WWW server by the page access means from the proxy server; A recording medium recording a program for functioning as page data holding means. 7. A page data update table creating means,
Referring to the page address field and the access time field in the page access information created by the page access information creating means, an access time group for the same page address is detected as information indicating the frequency of page access in the past, and Access time group detecting means for setting an address and the access time group in a page address field and an access time group field in a page data update table; and updating of page data in the past by referring to an update flag in the page access information. The update time group indicating the time at which the page data was updated among the access time groups detected by the access time group detection means is detected as the information indicating the frequency of the In the update table And update time group detecting means for setting the new time group field, based on the update time groups for each page address detected by the update time group detecting means,
Calculate a page data update interval indicating at what interval the page data of the page of each page address should be updated, and set the page data update interval in the page data update interval field in the page data update table. 7. The recording medium according to claim 6, further comprising: a page data update interval calculating unit that performs the updating. 8. The method according to claim 5, wherein “each page that has been frequently accessed in the past” means “each page that has been accessed twice or more in the past”. The recording medium according to claim 7.