JP2000076168A - Distribution method of cache updating notice and system therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability in a client and to reduce a network traffic amount by shortening response time to requests from respective clients and also reducing the number of times of access. SOLUTION: A server 1 periodically analyzes the access log of a proxy cache, compares the list of addresses exceeding the threshold of the set number of times of the access with a contents gathering table and performs the updating of addition or elimination. Further, to the request from the client, the present contents collecting table and an updating notice destination address are displayed and a reporting destination address is edited. The contents collecting table and a history log are periodically referred to by an updating request/notice distribution processing and the updating is requested to the proxy cache. When the updating to the address is present, an updating notice is transferred to a mail address stored in the contents collecting table. The respective clients 2 request latest contents to the proxy cache and refer to them by the updating notice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to TCP / IP (Tra
nsmission Control Protocol / Internet Protocol) network, a WWW proxy server (World Wide Web Proxy
A cache update notification distribution method and system for distributing a cache update notification to transfer the latest content, which is automatically collected from an access log of a server) and has updated access, based on a request from each client, based on a request from each client About.

[0002]

2. Description of the Related Art Conventionally, in a TCP / IP network such as the Internet or an intranet, when a visitor (client) of a homepage visits a WWW page by a WWWProxy server (proxy cache for WWW), the original page is accessed. Return to homepage viewer. Then, it caches (stores) it in its own disk, and reads and sends out the WWW page stored in the disk for subsequent access to the same WWW page. That is, a so-called cache process for speeding up data processing is executed.

In such a system, each client acquires the contents of the server at a predetermined time (for example, every several minutes). If there is a change in the content, each client notifies it. In addition, when acquisition of content is not set at a time determined for each client, access is made for each new content and the update of the content is confirmed.
Since the content acquisition time is set for each client as described above, the number of accesses from the client to the WWW proxy server increases. If the power of each client is not turned on (ON), it is not clear whether the content has been updated.

As a proposal for this type of system, Japanese Patent Laid-Open Publication No.
A conventional example disclosed in Japanese Patent Publication No. 68010 “Distributed Cache Management System” is well known. In this conventional example, consistency between directory information of a server that provides a communication address and the like and cache information of a client that reuses this directory information by a cache is efficiently maintained.

[0005]

As described above, in the above-described conventional example, since the content acquisition time is set for each client, the number of accesses from the client to the WWW proxy server increases, and If the client is not turned on (ON), it is not known whether the content has been updated. In other words, W
Since the WW proxy server does not always hold the latest content with a large number of accesses, the response time to a request from each client increases, and the number of accesses increases. That is, there are disadvantages that the operability on the client is poor and the network load increases.

[0006] The present invention solves the above-mentioned problems in the conventional technology. The response time of a request from each client in a WWW proxy server is shortened, the operability in the client is improved, and It is an object of the present invention to provide a cache update notification distribution method and a system thereof that can reduce the number of accesses to the WWW proxy server, reduce the amount of network traffic, and suppress the increase in network load.

[0007]

In order to achieve the above object, a cache update notification distribution method according to the present invention distributes a cache update notification from a server to a client. Analyze the access log, create an address list exceeding the threshold of the set access count, compare this list with the content collection table, add and update changes, and then respond to requests from clients The editing process displays the current content collection table and the update notification destination address to edit the notification destination address. The update request / notification delivery process periodically refers to the content collection table and the history log to the proxy cache. Request an update, then
When the address in the content collection table is updated, an update notification is transferred to the e-mail address stored in the content collection table, and the client requests the latest content from the proxy cache and refers to the updated content by the update notification. ing.

A cache update notification distribution method according to the present invention distributes a cache update notification from a server to a client, and the client registers, updates, or updates a cache request address in a content collection table of the server. The server notifies the server of the change of deletion, sets a flag in the content collection table through the editing process so that the address is not updated by the change notification from the client, and newly registers it. Analyze the cache access log, create an address list that exceeds the set access count threshold, and periodically refer to this content collection table and history log by the update request / notification distribution process to the proxy cache. Request an update and then in the content collection table When there is an update to dress, to transfer the update notification to the email address that is stored in the content collection table, the client is, by this update notification, refer to request the latest content to the proxy cache.

A cache update notification distribution system according to the present invention distributes a cache update notification from a server to a client. The server periodically analyzes a proxy cache access log and sets a threshold value of a set access count. Compare the address list exceeding the content collection table with the added or deleted one, and update the addition or deletion. In response to a request from the client, display and notify the current content collection table and update notification destination address through editing processing. Edit the destination address, and periodically refer to this content collection table and history log by the update request / notification delivery process to request an update to the proxy cache,
When the address in the content collection table is updated, an update notification is transferred to the e-mail address stored in the content collection table, and the client requests and refers to the latest content from the proxy cache according to the update notification. There is a configuration.

A cache update notification distribution system according to the present invention distributes a cache update notification from a server to a client, and the server registers and updates an address for making a cache request to a content collection table from the client. Alternatively, a flag is set in the content collection table through the editing process so as to prevent the update process from being executed by the change notification of deletion, and the flag is newly registered. Next, the access log of the proxy cache is periodically analyzed to set the threshold value of the number of access times Create an address list that exceeds the limit, periodically refer to the content collection table and history log through update request / notification distribution processing, request an update from the proxy cache, and check if there is an update in the address in the content collection table. When the content collection table Transfer the update notification to the email address stored, the client, this update notification, it is constituted to refer requesting latest content to proxy cache.

[0011] As the server, at least the same WW
In response to W page access, a WWW proxy server for reading and processing stored WWW pages at a high speed, a WWW server for transferring data at a URL position using the HTML protocol, and a mail for processing transmission and reception of e-mail in the WWW A server, an access log that records the number of accesses to a preset address, and a log analysis processing unit that refers to the access log and totals addresses whose preset number of accesses exceeds a threshold to create a list. An editing processing unit for editing a request for adding, updating, or deleting an update notification from the WWW server to the content collection table via the WWW server; and a content collection list unit including the content collection table, at predetermined intervals. An update request is sent to the WWW proxy server, and the result is sent to the update request and Update request / notification distribution processing unit that creates and transfers an update notification to the e-mail address stored in the content collection table when there is an update based on the notification distribution history information, and a history of the update request and notification distribution And a history access log for storing information.

[0012] The client has at least a WWW browser that accesses a WWW server in the server and performs a data read process;
And a mail software unit for managing writing.

When the server updates a deletion by comparing an address list exceeding a threshold value of a set access count with a content collection table, the server issues a deletion notification in an update request / notification distribution process. The deletion data is stored in another file.

[0014] TCP / I between the server and the client
It is configured to execute communication by the P protocol.

In the cache update notification distribution method and the system according to the invention having the above-described structure, the content collection table is created by analyzing the access log output from the server (WWW proxy server). An access request is made to the WWW proxy server through the update request / notification distribution process based on the content collection table, and the WWW proxy server caches the updated content. Each client accesses the WWW server and sets an update notification for the selected content through editing processing. Further, the client refers to the content collection table and the history access log by the update request / notification distribution processing, and receives the update notification through the mail software.

As described above, the WWW proxy server automatically collects the latest contents having a large number of access times and always holds the latest contents, so that the response time at the WWW proxy server for requests from each client can be shortened. Operability on the client is improved.

Also, an update notification request for the content collection table is set, and each time the update notification is received by e-mail without referring to the corresponding address, and is referred to.

As a result, the number of accesses to the WWW proxy server can be reduced, the network traffic amount is reduced, and the increase in the network load can be suppressed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a cache update notification delivery method and system according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a cache update notification distribution method and system according to an embodiment of the present invention. The system in this example is a server 1
And a client 2. Note that a large number of clients 2 are actually arranged.

The server 1 and the client 2 are a central processing unit, a CRT display device for displaying a database on a screen, an input device such as a keyboard, a mouse and a trackball for inputting characters and symbols, and coordinates, a hard disk device, and a floppy disk device. A general-purpose computer having a basic configuration such as a ROM storing a control program, a working RAM, and a printer for printing out is used. This system is compatible with UNIX and Windows
It is generally realized by a network OS such as NT Server or NetWare.

In FIG. 1, a server 1 includes a WWW proxy server 11 and a WWW server 1 which perform operations described below.
2, MAIL server 13, access log 14, log analysis processing unit 15, editing processing unit 16, content collection list unit 17, update request / notification distribution processing unit 18, and history log 19
have. The client 2 has a WWW browser 21 and a mail software (mail reader) unit 22.

Next, the operation of this embodiment will be described. In FIG. 1, first, the operation of each unit will be individually described. The WWW proxy server 11 operates as a WWW proxy cache, and reads and processes stored WWW pages at high speed in response to accesses to the same WWW pages. The WWW server 12 has a URL (Uniform Resou
rce Locator) data in HTML (Hyper Text Tr
ansfer Protocol). The mail server 13 processes transmission and reception of e-mail on the WWW. The access log 14 records the number of accesses to a preset address.

The log analysis processing unit 15 includes an access log 14
And sums up the addresses for which the preset number of accesses exceeds the threshold to create a list. This list is compared with the content collection table of the content collection list unit 17, and addition or deletion is performed according to the processing mode.
In the case of deletion, the update request / notification distribution processing unit 18 saves the information in a file (not shown) in order to perform deletion notification. Also, the editing processing unit 16 displays the content collection table in the content collection list unit 17 here through the WWW server 12, and adds, updates, or deletes an update notification from the WWW server 12 to this content collection table. Store and reflect the request. Further, the content collection list unit 17 creates a content collection table.

The update request / notification distribution processing unit 18 fetches the information of the content collection list unit 17 and the history log 19, and issues an update request to the WWW proxy server 11 at preset intervals. The result is compared with the update information of the history log 19 and the history information of the notification distribution. If an update has been made by this reference, a mail address stored in the content collection table of the content collection list unit 17, that is, an update notification to the client 2 in this case, is created.
The data is transferred through the server 13 and through the processing of the mail software unit 22 of the client 2. Also, the history log 19
Stores update request and notification distribution history information.

In the client 2, the WWW browser 21 accesses the WWW server 12 to read data. Mail software (mail reader) part 2
2 manages reading / writing of e-mail.

Next, the overall operation will be described. In FIG. 1, first, many clients 2 access the latest contents of the WWW proxy server 11. Also, the access log 14 periodically stores information on the number of accesses from the WWW proxy server 11,
The log analysis processing unit 15 analyzes the information on the number of accesses in the access log 14. In this analysis, a list is created by summing up the addresses of a large number of clients 2 that have exceeded a preset threshold value for the number of accesses.

The log analysis processing section 15 reads out this list and the content collection table of the content collection list section 17, takes them in, and compares them. Add or delete as needed. However, when the deletion is performed, the update request / notification distribution processing unit 18 saves it in another file (not shown) in order to perform the deletion notification. Thereafter, the editing processing unit 16 displays a list of the current content collection table and its update notification from the WWW browser 21 through the WWW server 12, and edits the notification destination address as necessary.

Further, the update request / notification distribution processing unit 18
The information of the content collection table of the content collection list unit 17 and the history log 19 are read and fetched, and an update request is made to the WWW proxy server 11 at preset time intervals, for example, at intervals of several minutes. This request result is compared with the storage information in the history log 19. If there is an update by this reference, an update notification for the mail address stored in the content collection table of the content collection list section 17 is created and sent to the client 2 through the mail software section 22 through the mail server 13. Forward. Then, the WWW proxy server 11 sends the notification to the WWW browser 21 of the client 2.
Then, if there is a request for the address, the updated latest content is returned.

For example, as described in detail later, U
RL address "http://www.xxx.co.
jp / "is stored in the content collection table of the content collection list section 17, and this URL address is sent from the WWW browser 21 of the client 2 to the W
When a request is made to the WWW proxy server 11, the WWW proxy server 11 sends the latest contents in the cache to the WWW browser 21 of the client 2, the processing of the WWW server 12 and the mail server 13, and the WWW browser 21 of the client 2 and the mail. The data is transferred through processing with the software unit 22.

The client 2 is a WWW server 1
Access 2 In this case, in the server 1, the update request is set for the content selected from the content collection table of the content collection list unit 17, so that the update request / notification distribution processing unit 18 can update the content collection list unit 17 and the history log 19. , And transfers the update notification to the client 2 through the processing of the MAIL server 13. The client 2 receives the update notification through the processing with the mail software unit 22. As a result, the response time in the WWW proxy server 11 for the request from the client 2 is reduced, and the information can be provided by the update notification.

Next, a specific operation of this embodiment will be described. FIG. 2 is a diagram for explaining a specific operation of the embodiment. As shown in FIGS. 1 and 2, from the WWW browser 21 of the client 2, for example, a URL address / mail address “http: //www.xx
x. co. jp /. ○○○○ ＠ □□□. co. An update request for “jp” is sent to the edit processing unit 16 through the WWW server 12 of the server 1 (A1). The editing processing unit 16 updates the content collection table of the content collection list unit 17 (A2). The update request / notification distribution processing unit 18 periodically refers to the content collection list unit 17 and requests the WWW proxy server 11 for content (A3).

The WWW proxy server 11 acquires the relevant address through the content collection table of the update request / notification distribution processing unit 18 and executes the cache (A
4). As a result, the URL address “http:
// www. xxx. co. jp / "" http: //
www. yyy. co. jp / "..." http: // "
/ Www. xxx. co. jp / ”is updated, the MAIL server 13 sends the mail address“ ○○○○ ＠
□□□. co. jp ”is delivered (A
5).

The mail software unit 22 of the client 2 receives the update notification through the mail server 13 of the server 1 (A6). In response to the update notification from the MAIL server 13, the WWW browser 21 sends the “http: //www.xxx.c” to the WWW proxy server 11.
o. jp / ”, and refers to the updated latest content (A7).

As described above, in this embodiment, the WWW proxy server 11 always holds the latest contents with a large number of accesses, and the response time at the WWW proxy server 11 for a request from the client 2 or the like can be shortened. Become like In other words, the response time to the client's request is shortened, and the operability at the client is improved. Also, an update notification request for the content collection table is set, and each time the update notification is sent to the MAIL server 1 without referring to the corresponding address.
Reference after receiving through 3. As a result, W
The number of accesses to the WW proxy server 11 can be reduced, the amount of network traffic can be reduced, and an increase in network load can be suppressed.

Next, another embodiment will be described. FIG. 3 is a diagram for explaining a specific operation of another embodiment. In the other embodiment, registration, update, or deletion of an address for which a cache is requested from each client 2 can be executed with respect to the content collection list unit 17 of the server 1.

The edit processing unit 16 is configured to execute the WW of the client 2
The address to be cached by the W browser 21 and the update destination address are registered, updated, or deleted from the content collection table of the content collection list unit 17. For this reason, the content collection list section 17 is controlled so that the update processing in the log analysis processing section 15 shown in FIG.
Of the manual flag 1 for the content collection table is set. When the manual flag 1 is set in the content collection table of the content collection list unit 17, the log analysis processing unit 15 does not update or delete the record. The other operations are the same as in the above embodiment.

Next, the operation of the main part of another embodiment will be described in detail. In FIG. 3, the WW of the client 2
When the W browser 21 receives, for example, the URL address “http
p: // www. zzz. co. jp / "is the address to be referred to. Enter the e-mail address of the notification destination as "XXXXX"
＠ □□□. co. jp ”to the editing processing unit 16 through the WWW server 12 of the server 1. Editing unit 16
Sends this update request to the content collection list unit 17 (A11). In this case, the editing processing unit 16 sets the manual flag 1 in the content collection table of the content collection list unit 17 and performs new registration (A12). Other operations are the same as (A3, A4, A5, A6, A7).

As described above, in the other embodiment, registration, update, and deletion can be performed not only from the content collection table of the content collection list unit 17 created by the log analysis processing unit 15 but also to the address that the client 2 wants to refer to. As a result, the operability on the client 2 is improved.

[0039]

As is apparent from the above description, according to the cache update notification delivery method and system of the present invention, the access log output by the WWW proxy server is analyzed to automatically collect the content in which the content is concentrated. And always hold.

As a result, the response time at the WWW proxy server for the request from each client can be shortened, and the operability at the client is improved.

Also, an update notification request for the content collection table is set, and each time an update notification is received by e-mail without referring to the corresponding address, it is referred to.

As a result, the number of accesses to the WWW proxy server can be reduced, the network traffic amount is reduced, and the increase in the network load can be suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of a cache update notification distribution method and system according to the present invention.

FIG. 2 is a diagram illustrating a specific operation of the embodiment.

FIG. 3 is a diagram for explaining a specific operation of a main part of another embodiment.

[Explanation of symbols]

 1 server 2 client 11 WWW proxy server 12 WWW server 13 MAIL server 14 access log 15 log analysis processing unit 16 editing processing unit 17 content collection list unit 18 update request / notification distribution processing unit 19 history log 21 WWW browser 22 mail software unit

Claims (8)

[Claims] 1. A cache update notification delivery method for delivering a cache update notification from a server to a client, wherein the server periodically analyzes an access log of a proxy cache and obtains an address list exceeding a set access count threshold. And compare this list with the content collection table and add
Update the change, and then respond to the request from the client, edit the notification destination address by displaying the current content collection table and update notification destination address through the editing process, and save the content collection table and history log. The update request / notification distribution process periodically refers to the proxy cache to request an update, and then, when an address in the content collection table is updated, updates the mail address stored in the content collection table. A cache update notification delivery method, comprising: transferring a notification; and the client requesting and referring to the latest content from a proxy cache by using the update notification. 2. A cache update notification delivery method for delivering a cache update notification from a server to a client, wherein the client notifies a content collection table of the server of a change in registration, update, or deletion of an address requesting a cache. The server sets a new flag by setting a flag in the content collection table through the editing process so that the update process is not executed for the address based on the change notification from the client, and then periodically stores the access log of the proxy cache. Analyze and create an address list exceeding the set access count threshold, request the proxy cache to update the content collection table and history log by periodically referencing the update request / notification delivery process, Next, the address in the content collection table is updated. A cache update notification, wherein the update notification is transferred to the e-mail address stored in the content collection table, and the client requests the proxy cache for the latest content by referring to the update notification. Delivery method. 3. A cache update notification distribution system for distributing a cache update notification from a server to a client, wherein the server periodically analyzes a proxy cache access log to exceed a set access count threshold. Adds or deletes the contents by comparing the address list with the contents collection table, and displays the current contents collection table and update notification destination address through the editing process in response to a request from the client, and displays the notification destination address. Edit and periodically refer to this content collection table and history log by the update request / notification delivery process,
Requests an update to the proxy cache, and when an address in the content collection table is updated, transfers an update notification to an e-mail address stored in the content collection table, and the client notifies the proxy cache by this update notification. A cache update notification distribution system that requests and refers to the latest content. 4. A cache update notification distribution system for distributing a cache update notification from a server to a client, wherein the server registers, updates or deletes an address at which a cache request is made to a content collection table from the client. A flag is set in the content collection table through editing processing so that update processing by notification is not performed, and new registration is performed. Next, the access log of the proxy cache is periodically analyzed to exceed the set access count threshold. Create an address list, periodically refer to this content collection table and history log through update request / notification distribution processing, request an update to the proxy cache, and when an address in the content collection table is updated, Stored in the content collection table Transfer the update notification to the email address, the client, this update notification, cache update notification delivery system characterized by reference requesting latest content to proxy cache. 5. The server according to claim 3 or 4, wherein at least a W stored for access to the same WWW page.
A WWW proxy server for reading and processing WW pages at high speed, and a W for transferring data at a URL position using the HTML protocol.
A WWW server, a mail server that processes transmission and reception of e-mail in the WWW, an access log that records the number of accesses to a predetermined address, and a predetermined number of accesses exceeding a threshold value with reference to the access log. A log analysis processing unit for compiling a list by summing addresses present, an editing processing unit for editing a request for adding, updating, or deleting an update notification from the WWW server to the content collection table via the WWW server; A content collection list section having a table and an update request to a WWW proxy server at a preset interval, the result is compared with the update request and the notification delivery history information. An update request to create and forward an update notification to the stored email address Cache update notification delivery system comprising: the notification delivery unit, a history access log for storing history information update request and notification delivery, the. 6. A client according to claim 3 or 4, wherein the client accesses at least a WWW server in the server to read data, and a mail software unit that manages reading / writing of e-mail. A cache update notification delivery system comprising: 7. The server performs a deletion notification in an update request / notification delivery process when the server updates a deletion by comparing an address list exceeding a set access count threshold with a content collection table. 4. The cache update notification delivery system according to claim 3, wherein the deleted data is stored in another file for the purpose. 8. A cache update notification delivery system according to claim 3, wherein communication between the server and the client is performed by a TCP / IP protocol.