JP3596602B2 - WWW server access method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to page data (data identified by a page address) on a WWW server by a WWW (World Wide Web) browser of a client (client PC (Personal Computer)) in a local network (LAN (Local Area Network) or the like). Server access method for realizing the access (page access) of the WWW server.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a client-server system implemented using a network such as the Internet, when page data of a WWW server is accessed from a client WWW browser, the page data is once accessed by using a proxy server. The page data for the page was kept on the proxy server. For example, JP-A-11-143759, JP-A-2000-076162, and JP-A-11-345244 disclose technologies using such a proxy server ("proxy server cache system", "reception processing server"). Pre-processing device ”and“ Similar information extraction and display method and system ”).
[0003]
With the technology 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, WWW Since the page data stored in the proxy server can be obtained without accessing the server, 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]
[Problems to be solved by the invention]
In the above-described conventional WWW server access method, a proxy server is provided to speed up an access response. However, the following problems still occur.
[0006]
The first problem is that when data (page data) is not stored in the proxy server, or when the stored data is old (when a data update request is received from the client and the data has already been updated), Since the latest data of the page requested to be accessed by the proxy server is not always held, the proxy server needs to access the WWW server. Therefore, it takes a long time for the client to obtain the desired page data. It is necessary.
[0007]
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.
[0008]
In view of the above, an object of the present invention is 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. WWW server access method that can increase the possibility of obtaining the latest page data quickly (can increase the processing speed) and reduce the load on the proxy server due to the reduced number of accesses to itself Is to provide.
[0009]
That is, according to the present invention, the relay server determines, for each page for which a connection request (access request) has been made from a client, how many intervals based on the frequency of past page data updates by a plurality of connected clients. It is calculated whether or not the page data should be updated, and a WWW server page access request (specifying the page address of the page in order to acquire the page data on the WWW server) to the proxy server at each interval is calculated. Access request). 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 receives and retains the page data (page data updated to the latest one) acquired by the proxy server (the relay server keeps its own page data so that it becomes new page data whenever possible). To update the page data held by). 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]
The patent publications related to the prior art for the WWW server access method of the present invention include, in addition to the above-mentioned publications, the point that the present invention considers efficient access from a WWW browser of a client to a WWW server. There is a similar “JP-A-2000-010947”.
[0011]
However, the technology (“the server information sharing method and the client server system to which the method is applied”) described in the above publication has a different configuration and effect from the present invention as shown in the following a and b. .
[0012]
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 of 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.
[0013]
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, according to 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, This has the effect of reducing the load on the proxy server.
[0014]
[Means for Solving the Problems]
According to the WWW server access method of the present invention, a plurality of relays provided between a plurality of clients and a proxy server in a local network (LAN or the like) connected to a WWW server via a network (Internet or the like). For each of the servers, the plurality of clients accessing in a distributed manner and the page access history information are referred to, and the page address, access time, and "page data are updated by the page access for each page access from the client" Page access information creating means in the relay server for creating page access information having "information indicating whether or not the page access information is created", and referring to the page access information created by the page access information creating means, the page addresses are the same. To access the page An update time group indicating a time group at which the page access is performed when the page data is updated is detected, and the page data update indicating how often the page data should be updated based on the update time group is detected. By calculating an interval, a 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 page that has been frequently requested in the past; Referring to the page data update table created by the page data update table creation means, for each page that has been frequently accessed in the past by the client, the proxy server is updated at regular intervals indicated by the page data update interval. WWW server page access required And a page address on the WWW server specified by the WWW server page access request based on a WWW server page access request from the page access requesting means in the relay server performing the latest Page access means in the proxy server for performing a WWW server page access for acquiring the page data of the above, and transmitting the page data acquired by the WWW server page access to the relay server; and the WWW server by the page access means Page data holding means in the relay server for receiving and holding the page data acquired from the proxy server from the proxy server.
[0015]
In addition, the WWW server access method of the present invention can be applied to each of several relay servers provided between a plurality of clients and a proxy server in a local network connected to a WWW server via a network. Based on the WWW server page access request from the relay server and the plurality of clients that are accessed in a distributed manner, by specifying a page address on the WWW server specified by the WWW server page access request to obtain the latest page data And a page access means in the proxy server for transmitting page data acquired by the WWW server page access to the relay server. , Page access history information A page access information creating means for creating a page access information 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 each page access from the client; By referring 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 data for each page frequently accessed in the past are calculated. Pages for which the update interval is set A page data update table creating means for creating a data update table, and referring 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, Page access requesting means for making a WWW server page access request to the proxy server at regular intervals indicated by a data update interval, and receiving from the proxy server page data acquired from the WWW server by the page access means. It can also be realized as a recording medium on which a program for functioning as page data holding means for holding and storing is stored.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described in detail with reference to the drawings.
[0019]
(1) First embodiment
FIG. 1 is a block diagram showing the configuration of the WWW server access method according to the first embodiment of the present invention.
[0020]
Referring to FIG. 1, the WWW server access method according to the present embodiment includes a local network 100, a WWW server 200, and the Internet 300 (which can be realized by another network such as an intranet). It is configured.
[0021]
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.
[0022]
The WWW server 200 has page data identified by a page address.
[0023]
As shown in FIG. 1, in the local network 100, the clients 101 to 104 access (connect) to the relay server 108, and the clients 105 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.
[0024]
The relay server 108 refers to the page access history information 30 indicating the past page access history of each of the clients 101 to 104 connected thereto, and the page access information 10 by referring to the page access history information 30 (see FIG. 4). Page data for creating a page data update table 20 (see FIG. 4), comprising: a page access information creating means 110 for creating a page data update table; an access time group detecting means 111; an update time group detecting means 112; The update table creating unit 114 refers to the page data update table 20 to request the proxy server 107 to access a WWW server page (a request for access performed by specifying a page address of the page in order to acquire page data on the WWW server 200). Request) page access A requesting unit 115 is configured to include a page data holding means 116 for holding receiving the page data obtained from the WWW server 200 by page access means 117 in the proxy server 107 from the proxy server 107.
[0025]
Although not shown, the relay server 109 includes the same units as the relay server 108.
[0026]
The proxy server 107 makes a WWW server page access to the WWW server 200 based on the WWW server page access request by the page access requesting means 115 (page access to the WWW server 200 by the page address specified by the WWW server page access request). The WWW server 200 includes a page access unit 117 for obtaining the page data identified by the page address (the latest page data at that time) from the WWW server 200.
[0027]
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 and It comprises 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, and a next page address transition step A8.
[0028]
FIG. 3 is a flowchart showing a page data update process 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.
[0029]
FIG. 4 shows the configuration 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, and page data update means). FIG. 9 is a block diagram showing the processing of the table creation means 114.
[0030]
Referring to FIG. 4, each entry in the page access information 10 includes a page address field 11, an access time field 12, and an update flag 13 (a flag indicating whether or not page data has been updated by the page access). Have on the element.
[0031]
Each entry in the page data update table 20 has a page address field 21, an access time group field 22, an update time group field 23, and a page data update interval field 24 as elements.
[0032]
Here, some means in FIG. 1 will be described with reference to FIG.
[0033]
The page access information creation unit 110 refers to the page access history information 30 and obtains information (page information) regarding each page access from the clients 101 to 104 in the past (during a certain period when the history information in the page access history information 30 is collected). Each entry (an entry having a page address field 11, an access time field 12, and an update flag 13 as an element) has an address, an access time, and "information indicating whether the page data has been updated by the page access". The page access information 10 is created.
[0034]
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, searches the access time field 12 in the entry group, and searches for a page access in the past. , A time group (access time group) at which a page access is made to the same page address is detected as information indicating the frequency of.
[0035]
The update time group detecting means 112 refers to the page access information 10 and selects an update flag 13 from an entry group having the same page address in the page address field 11 (an entry group extracted by the access time group detecting means 111). Is extracted (information indicating that the page data has been updated by the page access), the access time field 12 in the entry group is searched, and the page data of the page having the same page address is retrieved. Is detected (update time group).
[0036]
The page data update interval calculation unit 113 is configured to update the client 101 to 104 (relay server) based on an update time group (information detected by the update time group detection unit 112) indicating the frequency of update of page data of the same page address in the past. 108 shows how often the page data held by itself should be updated with the goal of always providing the latest page data when there is an access request from each client connected to the server 108). Calculate the page data update interval.
[0037]
The page data update table creation unit 114 creates the page data update table 20 by the processing of the access time group detection unit 111, the update time group detection unit 112, and the page data update interval calculation unit 113 as described above.
[0038]
Next, the overall operation of the WWW server access method configured as described above according to the present embodiment will be described in detail with reference to FIGS.
[0039]
As described above, in the local network 100 as shown in FIG. 1, each of the clients 101 to 104 or each of the clients 105 to 106 designates a page address for the relay server 108 or the relay server 109. Request for access to page data.
[0040]
First, the operation at the time of the page data update table creation processing will be described (see FIG. 2).
[0041]
Each of the relay servers (here, paying attention to the relay server 108), is executed at a certain time interval (for example, every time a certain number of page accesses are accumulated and the page access history information 30 is updated) as follows. To create the page data update table 20.
[0042]
First, the page access information creating means 110 in the relay server 108 refers to the page access history information 30 and, for each page requested to be accessed by the clients 101 to 104 (each client connected to the relay server 108), Information indicating whether the page address, access time, and page data have been updated is stored in a page address field 11 (here, page address fields 11-1, 11-2, and 11) in each entry in the page access information 10. -3, 11-4,...), Access time field 12 (here, access time fields 12-1, 12-2, 12-3, 12-4,...), And update flag 13 (here, , Update flags 13-1, 13-2, 13-3, 13-4,...) To create a page access information 10 with a respective entry (step A1).
[0043]
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 to update the page data as shown in a to c below. A table 20 is created.
[0044]
a. After creating the page access information 10 in step A1, the access time group detection 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).
[0045]
If the access time group detection unit 111 determines in step A3 that “an entry group having the same page address has been found”, that is, frequently (here, “two or more times”) page access for a certain page address (access If it is found that the request has been issued, the page address is set in the page address field 21 in an entry in the page data update table 20 (step A4).
[0046]
Further, the 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 the access time group, and stores the access time group in the page data. It is set in the access time group field 22 in the entry in the update table 20 (step A5).
[0047]
For example, the same page address as the page address in the page address field 11-1 in the page access information 10 shown in FIG. 4 is searched, and the page address in the page address fields 11-2 and 11-4 is the same page address. In this case, the contents of the access time fields 12-1, 12-2, and 12-4, which are the times at which page access was performed to the page address, are detected as an access time group, and the page address is determined. This is set in the page address field 21-1 in the page data update table 20 shown in FIG. 4, and the access time group is set in the access time group field 22-1.
[0048]
b. The update time group detection means 112 further sets the update flag 13 to true from the entry group in the page access information 10 to which the same page address is set (the entry group in which the access time group was detected in step A5). As the information indicating the frequency of page data updates in the past, the content of the access time field 12 in those entry groups is updated to indicate the "time at which page data was updated". The update time group is detected as a group, and the update time group is set in the update time group field 23 in the entry in the page data update table 20 (step A6).
[0049]
For example, in the case of the above example (when the contents of the page address fields 11-1, 11-2, and 11-4 in the page access information 10 shown in FIG. 4 are the same page address), the update flag 13-1 , 13-2, and 13-4, when the update flags 13-1 and 13-4 are true, 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 set in the update time group field 23-1 in the page data update table 20 shown in FIG.
[0050]
c. The page data update interval calculation unit 113 sends future updates from the clients 101 to 104 based on the update time group detected by the update time group detection unit 112 (information indicating the frequency of past update of 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, "How often should the page data in the relay server 108 be updated periodically (every fixed time)?" The page data update interval is calculated, and the page data update interval is set in the page data update interval field 24 in the entry in the page data update table 20 (step A7).
[0051]
In this way, the page data update table creation unit 114 stores the page address of the page that has been frequently accessed in the past (here, the page address of the page that has been accessed two or more times), the access time group, An update time group and a page data update interval are set in a page address field 21, an access time group field 22, an update time group field 23, and a page data update interval field 24 in each entry in the page data update table 20, The page data update table 20 is created.
[0052]
For example, when creating the page data update table 20 shown in FIG. 4, the page address field 21-1, the access time group field 22-1, the update time group field 23-1, and the page data update interval field 24-1 are set. Information is set in the entry of the element as described above.
[0053]
Then, when the processing in step A7 ends, the page data update table creating means 114 shifts the control to the processing in step A2 so as to perform the processing and determination in step A2 and subsequent steps for the next page address (step 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.
[0054]
On the other hand, if the access time group detecting means 111 determines in step A3 that "an entry group having the same page address cannot be found", it immediately performs the processing and determination in step A2 and subsequent steps for the next page address. Is transferred to (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.
[0055]
The page data update table creation unit 114 detects and calculates the values of each element for all page addresses, and then collectively sets the values of the page data update table 20, thereby creating the page data update table 20. It is also possible to realize.
[0056]
Second, the operation during the page data update process will be described (see FIG. 3).
[0057]
The page access requesting unit 115 in each relay server (here, paying attention to the relay server 108), determines 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. For each page data update interval in the page data update interval field 24 in the entry, a request to the proxy server 107 for a WWW server page access request specifying the relevant page address (for obtaining page data on the WWW server 200). Access request) (step B1).
[0058]
For example, the page access requesting means 115 in the relay server 108 determines whether the page of the page address in the page address field 21-1 in the page data update table 20 shown in FIG. At each data update interval, a WWW server page access request specifying a page address in the page address field 21-1 is made to the proxy server 107.
[0059]
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 the WWW server 200 identified by the page address specified in the WWW server page access request. The page access (WWW server page access) to the upper page is performed, and the page data updated as the latest one at that time is acquired from the WWW server 200 (step B2).
[0060]
The page data holding unit 116 in each relay server (here, paying attention to the relay server 108) receives the page data acquired from the WWW server 200 by the page access unit 117 in step B2 from the proxy server 107, and Data (updated page data) is held (step B3).
[0061]
As described above, by providing the relay server 108 and the relay server 109, when the clients 101 to 104 and the clients 105 to 106 make an access request to each page, they can quickly obtain updated page data. Can be. Further, since the number of accesses to the proxy server 107 decreases, the load on the proxy server 107 also decreases.
[0062]
(2) Modification of the first embodiment
The following modifications can be considered for the WWW server access method according to the first embodiment.
[0063]
In the WWW server access method according to the above-described first embodiment, the condition for setting a page address in the page data update table 20 is such that the condition that the page address is set in the past fixed period (history information accumulation period in the page access history information 30) The number of access requests (page accesses) to the address is two or more times. " That is, the criterion for determining whether or not an access request has been made frequently in the past is based on "whether or not an access request has been made twice or more in the past".
[0064]
However, it is also possible to set the criterion of “frequently” to “n (n is an integer of 3 or more) times” instead of “2 or more times”.
[0065]
In this case, the access time group detection means 111 in the page data update table creation means 114 determines whether or not entries of the same page address have been found to be n or more in total in the determination of step A3 in FIG. No will be determined.
[0066]
(3) Second embodiment
FIG. 5 is a block diagram showing a configuration of the WWW server access method according to the second embodiment of the present invention.
[0067]
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 recording is performed is provided. This recording medium 500 may be a magnetic disk, a semiconductor memory, or another recording medium.
[0068]
The WWW server access processing program is read from the recording medium 500 into 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 will be described as page access information 10, page data An update table 20, page access history information 30, page access information creation means 110, access time group detection means 111, update time group detection means 112, and page data update table creation means 114 including page data update interval calculation means 113; Control is performed as access request means 115 and page data holding means 116. The operation of the relay server 108 under the control of the WWW server access processing program (the page access information creating means 110 and the access time group detecting means 111 based on the existence of the page access information 10, the page data update table 20, and the page access history information 30) , The update time group detecting means 112, and the page data update table creating means 114 including the page data update interval calculating means 113, the page access requesting means 115, and the page data holding means 116) are the same as those of the first embodiment. Since the operation is exactly the same as that of the relay server 108, a detailed description thereof will be omitted.
[0069]
It is needless to say that the modification described in the above (2) can be applied to the present embodiment.
[0070]
【The invention's effect】
As described above, according to the present invention, the following processes a to e are performed so that the client can immediately obtain the updated latest page data by making an access request to each page. The effect that "the possibility of being able to do so is increased" is generated, and the effect that "the load is reduced due to a decrease in the number of accesses to itself" is generated for the proxy server.
[0071]
a. In a client-server system, several relay servers are provided between a plurality of clients and a proxy server.
[0072]
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.
[0073]
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.
[0074]
d. The proxy server makes a WWW server page access to the page for which the request for the WWW server page access of c above is made, and obtains “updated page data” from the WWW server.
[0075]
e. The relay server receives and holds the “updated page data” of d from the proxy server.
[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 21-4 page address fields
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
101-106 clients
107 proxy server
108-109 relay server
110 Page access information creation means
111 access time group detecting means
112 Update time group detection means
113 Page data update interval calculation means
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

Claims (6)

In a local network connected to a WWW server via a network,
For each of a plurality of relay servers provided between a plurality of clients and a proxy server, the plurality of clients accessing in a distributed manner,
The relay, which refers to the page access history information and creates page address, access time, and page access information having "information indicating whether or not page data has been updated by the page access" with respect to each page access from the client. Means for creating page access information in the server;
With reference to the page access information created by the page access information creating means, an updated 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. Then, by calculating a page data update interval indicating how often the page data should be updated based on the update time group, a page address and a page address of each page that has been frequently accessed in the past are calculated. A page data update table creating means in the relay server for creating a page data update table in which a data update interval is set,
Referring to the page data update table created by the page data update table creation means, for each page that has been frequently accessed in the past by the client, the proxy server is updated 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
Based on a WWW server page access request from the page access requesting means, 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 is performed. And a page access means in the proxy server for transmitting the page data obtained by the WWW server page access to the relay server;
A WWW server access method, comprising: a page data holding unit in the relay server for receiving and holding the page data acquired from the WWW server by the page access unit from the proxy server. Page access information having an entry having a page address field, an access time field, and an update flag as elements;
A page data update table having an entry having elements of a page address field, an access time group field, an update time group field, and a page data update interval field;
By 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. 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;
Referring to the update flag in the page access information, as information indicating the frequency of page data update in the past, the time at which the page data was updated in the access time group detected by the access time group detection means Update time group detecting means in the page data update table creating means for detecting an update time group to be indicated, and setting the update time group in an update time group field in the page data update table;
Based on an update time group for each page address detected by the update time group detection means, calculate a page data update interval indicating at what interval the page data of the page of each page address should be updated, WWW according to claim 1, characterized in that it has a page data update interval calculating unit of the page data update table created in means for setting the page data update interval in the page data update interval field in the page data update table Server access method. 3. The WWW server access 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". In a local network connected to a WWW server via a network,
For each of a plurality of relay servers provided between a plurality of clients and a proxy server, the plurality of clients accessing in a distributed manner, and based on a WWW server page access request from the relay server, A WWW server page access for acquiring the latest page data is performed by designating a page address on the WWW server designated by the WWW server page access request, and the page data acquired by the WWW server page access is transferred to the relay server. Assuming that there is a page access means in the proxy server that transmits to the
The relay server refers to the page access history information, and obtains a page address, an access time, and “information indicating whether or not the page data has been updated by the page access” for each page access from the client. The page access information created by the page access information created by the page access information created by the page access information created by the page access information created by the page access is created. An update time group indicating a time group is detected, and a page data update interval indicating how often the page data is to be updated is calculated based on the update time group. Page address for each page Page data update table creating means for creating a page data update table in which a page data update interval is set, and referring to the page data update table created by the page data update table creating means, the client frequently accesses in the past. For each requested page, a page access requesting unit for making a WWW server page access request to the proxy server at regular time intervals indicated by the page data update interval, and the page access unit acquires from the WWW server by the page accessing unit. A recording medium for recording a program for functioning as page data holding means for receiving and holding the page data from the proxy server. The page data update table creation 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 detection 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;
Referring to the update flag in the page access information, as information indicating the frequency of page data update in the past, the time at which the page data was updated in the access time group detected by the access time group detection means Update time group detecting means for detecting an update time group to be indicated, and setting the update time group in an update time group field in the page data update table;
Based on an update time group for each page address detected by the update time group detection means, calculate a page data update interval indicating at what interval the page data of the page of each page address should be updated, 5. The recording medium according to claim 4, further comprising: a page data update interval calculation unit that sets the page data update interval in a page data update interval field in the page data update table. 6. The recording medium according to claim 4, wherein "each page that has been frequently accessed in the past" means "each page that has been accessed twice or more in the past".

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