JP2000029765A - Optimum caching managing method of web client and its system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimally manage a WEB caching of newest and required data by the update frequency and reading the frequency of contents viewed. SOLUTION: In this optimum caching managing method, the content updating frequency at a WEB server 20 and the reading frequency at a WEB client 10 are analyzed to decide the keeping period and the arranging place of cache data according to the analyzing result, and contents, which is read frequently at the web client and frequently updated at the WEB server are stored on the memory of the WEB client, without storing in cache areas 12, 14 on a disk by the WEB client.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a caching management method in a client that browses contents from a Web (Web) server, and more particularly to a method and system for determining an appropriate cache data retention period and location.

[0002]

2. Description of the Related Art A conventional WEB browser cyclically accumulates all content data browsed from a WEB server in a designated temporary work temporary disk area. The content data stored in the temporary disk area is called "cache data", and the area is called "cache area".

However, according to the conventional cache data storage management method, frequently browsed data and frequently updated content data are also stored in the cache area, which causes pressure on the disk area and the processing speed of the CPU. Will cause a decline.

FIG. 6 is a diagram for explaining a conventional cache data management method in a Web client. Referring to FIG. 6, when the web client 10 makes a content request to the web server 20 (1), the content data is transmitted from the web server 20 (2), and the web client caches the content data. At this time, if the same content already exists, it is overwritten with the latest content (3). When the cache area exceeds the specified capacity, the cache data stored in the cache area is deleted from the oldest one (4). WEB again
When the client 10 makes a content request to the web server 20, content data is transmitted from the web server 20, and the web client 10 repeats a browsing cycle of caching the content data.

[0005]

As described above, in the conventional WEB client system, all the caching data fetched from the server is stored in the WEB client side. Therefore, it is necessary to secure a disk area for a large amount of caching data. There is a problem that the processing performance is degraded because the file IO and the use of the CPU are wasted.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide the latest and necessary data WE based on the frequency of updating or browsing the contents.
It is an object of the present invention to provide a method and a system capable of optimally managing B caching.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a content update frequency in a web server,
The browsing frequency at the B client is analyzed, and the retention period and the location of the cache data are determined according to the analysis result. That is, the present invention
Storage of caching data in a WEB client based on a predetermined calculation formula based on a numerical value determined according to the magnitude of the content browsing frequency at the client and a numerical value determined according to the magnitude of the frequency of updating the content of the WEB server. The period and storage location are determined, and the content that is frequently browsed by the WEB client and frequently updated by the WEB server is not stored in the cache area on the disk but is stored in the memory of the WEB client. I do.

[0008]

Embodiments of the present invention will be described. FIG. 1 is a diagram for explaining a web caching management method according to an embodiment of the present invention. Referring to FIG. 1, in one embodiment of the present invention, at the time of the first browsing, the WEB client 10
(1), the content data is transmitted from the web server 20 (2), and the web client 10 caches the content data (3). At this time, if the cache area exceeds the specified capacity, the cache data stored in the cache area is deleted from the oldest one ((4) -1).

In the second and subsequent browsing, when the web client 10 makes a content request to the web server 20 (1), the content data is transmitted from the web server 20 (2), and the web client 10 caches the content data. (3). At this time, a caching method is selected and executed from the first browsing request date / time information and the content data update date / time information as follows (4).

[0010] That is, the storage period and storage location of the caching data are determined based on a predetermined formula from the content browsing frequency of the web client 10 and the content update frequency of the web server 20. For example, frequently browsed content and frequently updated content are not cached on disk,
Caching is performed on the memory until the end of the web browser. More specifically, when the web client requests content to the web server in the second and subsequent browsing, the web server transmits update date and time information together with the content to the web client, and the web client refers to the content this time. The reference frequency information is calculated from the date and time information and the previous reference date and time information, and the update frequency information is calculated from the currently received update date and time information of the content and the previously received update date and time information. Calculate the content retention ratio from a corresponding numerical value and a numerical value corresponding to the update frequency information using a predetermined formula,
The storage period and storage location of the content are determined with reference to a table or the like in which the storage period and storage location corresponding to the value of the storage ratio are stored in advance.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a diagram for explaining an embodiment of the present invention, and is a diagram showing a process of referring to the first WEB content.

It is assumed that the client terminal 10 first refers to the contents on the WEB server 20 using a WEB browser.

When browsing the content for the first time, the client terminal 10 requests content data (step S10). The WEB server 20 transmits the update date-1 to the client terminal 10 together with the content data (step S11). The data is stored in the cache area of the client terminal 10 as cache data.

At this time, in the cache data of the referenced content, the date and time when the content was updated and the content update date and time-1 are recorded as attributes.

If the cache area of the client terminal is insufficient and the cache data of the new content cannot be stored, the old cache data is deleted (step S14) and the cache data of the new content is stored.

At the same time, the date and time when the content was first referenced (content reference date and time-1) is determined (step S).
12) Then, the attribute is recorded in the cache data (step S15). The cache area stores the content update date and time-1 and the content reference date and time-1 together with the content data.

FIG. 3 is a diagram for explaining the operation of the embodiment of the present invention, and is a diagram showing a process of referring to the WEB contents after the second time.

It is assumed that the client terminal 10 uses the WEB browser to refer to the previously referred content on the WEB server 20. The WEB server 20 receives the content data request from the client terminal 10 (step S20), and transmits the content data (step S21).

The referenced content data, ie, W
The content data transmitted from the EB server 20 includes:
The date and time when the content was updated on the WEB server 20 (content update date and time-2) is recorded as an attribute.

In the client terminal 10, the WEB
The date and time when the content was referenced from the server (content reference date and time-2) is stored in the memory as an attribute. Further, the reference date / time-2 of the content is determined (step S2).
2).

The date and time when the content was updated (content update date and time-2), the date and time when the content was referenced (content reference date and time-2), and the date and time when the content of the previously referenced content data in the cache area was updated ( The content update date and time-1) and the date and time when the content was referenced (content reference date and time-1) are compared, and the interval for browsing the content on the client terminal and the interval for updating the content on the WEB server are calculated. (Step S23).

The caching method in the client terminal is determined based on the calculated time (step S2).
4).

As a method of determining a caching method,
The interval for browsing the content on the client terminal and the interval for updating the content on the WEB server are represented by W
The constants corresponding to these intervals are obtained and multiplied by referring to the EB caching retention ratio table (see FIG. 4).

The result of this operation is defined as a retention ratio, and the cache data retention period and storage location are determined from the retention ratio. Referring to FIG. 4, a result obtained by multiplying an operation constant corresponding to an interval at which content is browsed on the client terminal by an operation constant corresponding to an interval at which content is updated on the WEB server is set as a retention ratio, and a value of the retention ratio The storage location is determined in accordance with the storage period of the cache data according to.

The content browsing interval at the client terminal is determined by the difference between the current content reference date and time and the previous content reference date and time ((content reference date and time-
2)-(content reference date-1)), and the interval at which the content is updated on the WEB server is calculated based on (content update date-2) information and (content update date-1) information, (content update date-1). 2)-(content update date and time
-1).

For example, referring to FIG. 4, the holding ratio is 1.
In the case of 00, the content data is stored in the memory until the browser ends. If the retention ratio is smaller than 0.99, it is stored in the cache area. In addition, when the content data is stored in the cache area, the cache data retention period is added to the date and time (content reference date and time-2) when the content was referenced from the WEB server as the content deletion date and recorded as an attribute.

If the cache area of the client terminal is insufficient and the cache data of the new content cannot be stored, the old cache data is deleted and the cache data of the new content is stored (step S).
26, S27).

Further, a caching period corresponding to the holding ratio is determined from the web caching holding ratio table (FIG. 4) to calculate a content deletion period (step S28).
The content data is written in the cache area with the content reference date / time-2 and the content deletion date / time added (step S29).

FIG. 5 is a diagram for explaining the operation at the time of terminating the browser in one embodiment of the present invention. When the web browser of the client terminal 10 is terminated, the cache data that exceeds the content deletion date and time is checked (step S32), and if there is the corresponding cache data, this is deleted (step S33) and the web browser is terminated. .

[0031]

As described above, according to the present invention,
The storage period and storage location of content are determined based on the content reference frequency and update frequency, and those with high reference frequency and update frequency are not cached or the storage period is shortened to save disk space and waste. There is an effect that the processing performance of the system is improved by eliminating the processing of the file IO and the CPU.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is a diagram illustrating a processing flow according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a processing flow according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating a processing flow according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a processing flow according to an embodiment of the present invention.

FIG. 6 is a diagram for explaining a conventional system.

[Description of Signs] 10 Web client 12, 14 Cache area 20 Web server 21, 22 Content data

Claims (6)

[Claims] When a web client caches content data from a web server, a content update frequency in the web server and the web
An optimized caching management method for a Web client, comprising analyzing a browsing frequency at a client, and determining a retention period and a storage location of content data according to the analysis result. 2. A method according to claim 1, further comprising the step of: determining a numerical value determined in accordance with the frequency of content browsing on said web client;
Based on a predetermined calculation formula from a numerical value determined according to the magnitude of the frequency of updating the content of the server, the storage period and the storage location of the caching data in the WEB client are determined, and frequently viewed by the WEB client, 2. The W client according to claim 1, wherein the content that is frequently updated by the WEB server is not stored in a cache area on a disk of the WEB client, but is stored in a memory of the WEB client.
EB client optimization caching management method. 3. When the web client requests content to the web server in the first browsing, the web server transmits update date and time information together with the content data from the web server to the web client. When the WEB client requests content from the WEB server in the second and subsequent browsing, the WEB server transmits the update date and time information together with the content data to the WEB client, Then, the reference frequency information is calculated from the current reference date and time information of the content data and the previous reference date and time information, and the update frequency is calculated from the update date and time information received this time and the update date and time information received previously for the content data. information Calculating a retention ratio of the content data from a numerical data corresponding to the reference frequency information and the numerical data corresponding to the update frequency information, using a predetermined formula, a retention period and a storage location corresponding to the value of the retention ratio WE is determined with reference to a table in which the content is stored in advance.
Optimization method for caching of client B. 4. When storing content data in the cache area based on the value of the holding ratio, the WEB client adds date and time information obtained by adding a cache data holding period to a reference date and time when the content is referred to. 4. The method according to claim 3, wherein the date and time are recorded as a deletion date and time. 5. The method according to claim 3, wherein when the web browser is terminated, the content data stored in said cache area and having a current date and time after said content deletion date and time are deleted from said content data. W described
EB client optimization caching management method. 6. When the web client requests content to the web server in the first browsing, the web server transmits update date information together with the content data from the web server to the web client. The update date and time information is recorded and held, and when the WEB client requests content to the WEB server in the second and subsequent browsing, the WEB client transmits the update date and time information together with the content data to the WEB client. The reference frequency information is calculated from the current reference date / time information and the previous reference date / time information for the content data, and the update frequency information is calculated from the currently received update date / time information and the previously received update date / time information of the content. Calculated and the reference frequency A retention ratio of the content data is calculated from a numerical value corresponding to the information and a numerical value corresponding to the update frequency information by a predetermined calculation formula, and a table storing a retention period and a storage location corresponding to the value of the retention ratio is referred to. And a means for deciding a retention period and a storage place of the content.