JP2002244855A - Server-client system and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make application programs existing on a server continuously usable on a client if the client once loads the application programs and starts execution. SOLUTION: A minimum program code required at the starting of the server itself is stored in ROM s3. Control programs and application programs for the server are stored in an auxiliary storage s6 such as an HDD and executed on a CPU s2 after loaded in an RAM s4. Various kinds of information on the server are displayed on a display device s10 such as a CRT via a video controller s9. The client side is similarly constituted. The application programs that are loaded from the server to the client in a connecting state to be an executable state can be executed at the client even after disconnection with the server.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a server / client system and a method for executing the same, and more particularly, to a server / client system having one or more servers having a large processing capability and one having a function simpler than a server. Also, the present invention relates to a server-client system, a method for executing the server-client system, and a recording medium to which more or more clients are connected and which operate in cooperation.

[0002]

2. Description of the Related Art A client in a conventional server-client system can use only programs installed and available on a client in a stand-alone state without being connected to the server. In the connected state, an application program on the server can be used in addition.

[0003]

However, in such a conventional example, since it is assumed that the server and the client are always in a connected state, there are the following disadvantages. In other words, when the client executes an application program that exists on the server,
Both must be connected. Also, even if a connection is made and the application program on the server is executed, if the connection is lost even once, the application program on the server that has been used until now cannot be executed at all, and the application program will be executed. Then, the application program causes a fatal error.

[0004] The present invention has been made in view of such a problem, and an object of the present invention is to first load and execute an application program existing on a server, and thereafter, the server and the client are started. Server / client client that can continue to use the application program on the client without error even if the connection with the client is lost
It is to provide a system.

Another object of the present invention is to execute an application program including a plurality of module groups and disconnect the client from the server even if a module that has not yet been loaded on the client remains on the server. In addition, only modules already loaded on the client are enabled,
It is an object of the present invention to provide a server client system capable of continuing to execute the application program.

Still another object is to execute an application program including a plurality of module groups.
Even when not connected to the server, only the minimum functions including the main module can be used by the client only, and when connected to the server, the functions of the modules existing on the server can be additionally used. To provide a server-client system.

[0007]

According to the present invention, in order to achieve such an object, the invention according to claim 1 is a method for loading and executing a plurality of application programs on a server to a client. Executing means for executing a plurality of application programs on the client on the client; first determining means for determining whether the server and the client are currently connected; and Second determining means for determining whether the currently executable application program has been loaded from the server, has not been loaded, or exists in the external storage device of the client. The application is loaded from the server to the client in a connected state and is executable. The Deployment program, is characterized in that it has to be run on the client, even after turning off the cut with the server.

In such a configuration, the first execution means for loading a plurality of application programs on the server into the client and executing the application program is to load the application programs stored on the server and in the external storage device of the client on the client. , So that only the shortcut icon for the activation is displayed on the client side. The second execution means for executing a plurality of application programs on the client on the client displays, on the client, a shortcut icon for the program stored in the external storage device of the client on the client, and selects the shortcut icon on the memory of the client according to the selection. To be loaded and executed. First determining means for determining whether the server and the client are currently connected operates on the client, constantly monitors whether or not the client and the server are connected, and stores the monitoring result in the memory of the client. Acts as a flag above. The application program currently executable on the client is
The second determining means for determining whether the application has been loaded from the server, the one before loading, or the one stored in the external storage device of the client is provided in such a manner that the application on the server is activated by selecting a shortcut icon. Instructed and loaded from the server to the client side and "loaded" if it is in the client's memory
If the shortcut icon has not been loaded yet from the server and only the shortcut icon exists on the client side, it is determined to be “Before loading”, and the application originally existing in the client external storage device is referred to as “Client external storage device”. Is in effect. "

The invention described in claim 2 is the first invention.
In the invention described in (3), a third execution means for loading and executing a minimum module including a main module required at the time of startup from an application program including a plurality of modules existing in the server to a client; Third determining means for determining whether the server and the client are currently connected; and, when the loaded main module is being executed, when a function not included in the main module is to be used, the function is included in the main module from the server. A fourth execution unit that loads and executes another module including a function that is not included in the client, and a fourth execution unit that determines which module of the main module and the other module is already loaded in the client. A determining means, and according to a result of the determination by the third and fourth determining means. It is characterized in that it has to change the functions of the application program.

[0010] In such a configuration, of the application program composed of a plurality of modules existing in the server, a minimum module including a main module required at the time of startup is loaded into the client and executed.
The execution means is a main module having a minimum function required by the application program to start the application program, and an additional module including an additional function (this is generally known as a dynamic module (DLL)). , It acts to load only the main module from the server first. Third determining means for determining whether the server and the client are currently connected is operating on the client, constantly monitoring whether or not the client and the server are connected, and storing the monitoring result in the memory of the client. To act as a flag. In a case where a function not included in the main module is to be used during execution of the loaded main module, a fourth execution unit that loads and executes another module including a function not included in the main module from the server to the client includes: If a client tries to use a function that is not included in the main module while the main module is running on the client, a module that includes that function can be dynamically loaded from the server to the client and executed. Works. 4. Determine which module of the main module and other modules has been loaded on the client
Is operated on the client side to monitor and determine which of the main module and the other modules has been loaded on the client side, and act to hold the determination result as a flag.

The invention described in claim 3 is the same as the claim 2
In the invention described in the above, out of the application program consisting of the plurality of modules, a minimum module including a main module required at the time of startup exists in the client, and the other modules exist in the server. It is a feature.

In such a configuration, even if the client is started in a stand-alone state without being connected to the server, only functions that can be realized with a minimum number of modules including the main module existing in the client are available. Further, when the client is connected to the server, in addition to the minimum functions, the module existing in the server is additionally loaded so that the additional functions included in the additional module can be used.

[0013] The invention according to claim 4 is a server / server.
An execution method of a client system, wherein only a shortcut icon for starting the application program is displayed on the client side so that an application program stored on the server and in an external storage device of the client can be executed on the client. Displaying, on the client, a first execution step of loading and executing a plurality of application programs on the server to the client, and displaying a shortcut icon to the program stored in the external storage device of the client on the client; A second execution step of executing a plurality of application programs on the client on the client such that the application programs are loaded and executed on the memory of the client upon selection; and operating on the client;
A first determination step of determining whether or not the server and the client are currently connected so as to constantly monitor whether or not the client and the server are in a connected state, and to hold the monitoring result as a flag in the memory of the client; When,
The application on the server is instructed to start by selecting a shortcut icon, loaded from the server to the client side, and is determined to be "loaded" if it is in the memory of the client. The shortcut on the side
If only the icon exists, it is determined to be “before loading”, and the application that can be executed by the client at present is determined to be “existing in the client's external storage device” so that the application that originally exists in the client's external storage device is determined. Second to determine whether the program is loaded from the server, before loading, or in the external storage device of the client
And a determining step.

The invention described in claim 5 is the same as the claim 4.
In the invention according to the above, if the application program is required for its startup and consists of a main module having a minimum function and an additional module including an additional function, first load only the main module from the server, A third execution step of loading and executing a minimum module including a main module required at the time of startup from an application program including a plurality of modules existing in the server on a client; A third determination for determining whether or not the server and the client are currently connected, so as to constantly monitor whether or not the client and the server are in a connected state, and to hold the monitoring result as a flag on the memory of the client. Step and executing the main module during execution of the main module on the client. If the client tries to use a function that is not included in the module, the module containing the function can be dynamically loaded from the server to the client side and executed. A fourth executing step of loading and executing another module including a function not included in the main module from the server to the client when trying to use a function not included in the module, and operating on the client side. To determine which of the main module and other modules are already loaded on the client side, and to hold the determination result as a flag,
And a fourth determining step of determining which of the main module and the other modules has been loaded on the client.

The invention described in claim 6 is the same as the invention in claim 5
In the invention described in the above, even when the client is started in a stand-alone state not connected to the server, only the functions that can be realized with a minimum number of modules including the main module existing in the client are available. When a client is connected to a server, in addition to the minimum functions, additional modules included in the server are additionally loaded so that the additional functions included in the additional module can be used. It is.

[0016] Further, the invention according to claim 7 is a server / server.
A recording medium on which a program for causing a computer to execute a method of executing a client system is recorded, and the application program stored on a server and an external storage device of the client is started so that the application program can be executed on the client. Execution step of loading and executing a plurality of application programs on the server to a client so as to display only a shortcut icon for the client on the client side, and a program stored in an external storage device of the client Displaying a shortcut icon on the client, and executing a plurality of application programs on the client on the client such that the selection causes the application to be loaded and executed on the memory of the client. The server and the client operating on the client and constantly monitoring whether or not the client and the server are in a connected state, and retaining the monitoring result as a flag in the memory of the client. A first determination step of determining whether the application is currently connected, and an application on the server is instructed to start by selecting a shortcut icon;
If it is loaded from the server to the client and it is in the memory of the client, it is judged as "loaded". If it is not loaded from the server and only the shortcut icon exists on the client, it is called "before loading". Judges whether the application originally existing in the client's external storage device is "existing in the client's external storage device" so that the application program currently executable on the client is already loaded from the server. A computer-readable recording medium comprising a second determining step of determining whether the data is loaded before loading or is stored in an external storage device of the client, and causes the above-described steps to function.

Further, the invention according to claim 8 is a server / server.
A program for causing a computer to execute a method of executing a client system, wherein an application program stored on a server and an external storage device of the client can be executed on the client.
A first execution step of loading and executing a plurality of application programs on the server to a client so that only a shortcut icon for the activation is displayed on the client side, and storing the application program in an external storage device of the client A plurality of application icons on the client so that a shortcut icon to the selected program is displayed on the client and the selection causes the icon to be loaded and executed on the client memory.
A second execution step of executing the program on the client; and operating on the client, always monitoring whether the client and the server are in a connected state, and using the monitoring result as a flag in the memory of the client. A first determination step of determining whether the server and the client are currently connected so as to retain the application; and an application on the server is instructed to start by selecting a shortcut icon, and is loaded from the server to the client side; If it is on the client's memory, it is determined to be "loaded". If it has not been loaded from the server and only the shortcut icon exists on the client, it is determined to be "before loading". The application that exists on the device In the external storage device, whether the application program currently executable on the client is already loaded from the server, before loading, or in the client's external storage device. This is a program comprising a second determination step of determining whether each step is performed, and causing each of the steps to function.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a block diagram for explaining one embodiment of a server-client system of the present invention.
In the figure, reference numeral 1 denotes a server, and 2 denotes CPUs 2 for controlling the server. The minimum program code necessary for starting the server itself is stored in the ROMs3. The server control program and application programs are stored in an external storage device s6 such as an HDD, and are executed on the CPUs2 after being loaded into the RAMs4. Various information on the server is stored in the video controller s9.
Are displayed on a display device s10 such as a CRT. Also,
Command input to the server and the like are performed from a keyboard s8 connected via a keyboard controller s7. The server is connected to the client via the network controller s5.

Reference numeral 11 denotes a client, and reference numeral 12 denotes a CPU c12 that controls the server. The minimum program code necessary for starting the client itself is stored in the ROM c13. Client control programs and application programs are stored in an external storage device c16 such as an HDD, and are stored in a RAM c14.
Is executed on the CPU c12. Various information on the client is displayed on a display device c20 such as a CRT via a video controller c19. A command input or the like to the client is performed by a keyboard c18 connected via a keyboard controller c17.
It is performed from. The client is connected to the server via the network controller c15.

FIG. 2 is a flowchart for explaining the operation of the server-client system shown in FIG. First, the client 11 is started (S001).
Then, the operating system running on the client 11 displays a shortcut icon for starting the application A on the desktop so that the application A stored in the external storage device c16 of the client 11 can be started (S002). Subsequently, a shortcut icon for starting the application B stored in the external storage device C16 of the client 11 is also displayed on the desktop (S003). In this state, although the client 11 is not connected to the server 1 yet, the user instructs and uses the applications A and B of the client 11 using the keyboard C18 of the client 11 or the like. Can be.

Next, the tool that operates on the client 11 and monitors the connection status between the server 1 and the client 11 checks the connection status, and records the result as a flag in the RAMc 14 of the client 11 ( S004). If the connection state with the server 1 is not recognized, the process returns to S004, and the connection state with the server 1 is repeatedly checked. Of course, in this state, the use of the applications A and B from the client 11 is possible. FIG. 3 shows this state. In FIG. 3, reference numeral 21 denotes a desktop screen appearing on the display device c20 of the client 11, in which only a shortcut icon 22 to the application A and a shortcut icon 23 to the application B are displayed.

When the connection with the server 1 is recognized in S004, the operating system of the client 11 searches for an application that exists on the server 1 and is usable by the client. As a result of the search, the application C and the application If it is determined that D is available, a shortcut icon 24 to the application C is displayed on the desktop (S005), and a shortcut icon 25 to the application D is displayed on the desktop (S006). Here, only the shortcut icon for startup is displayed, and the application module itself still exists on the server. FIG. 4 shows this state. In FIG. 4, reference numeral 24 denotes a shortcut to the application C that is present on the server and is available on the client by being connected to the server.
Similarly, 25 represents a shortcut icon to the application D.

That is, since the server and the client are connected, in addition to the client applications A and B,
Indicates that applications C and D of the server have become available. Here, the tool that monitors the connection state between the server 1 and the client 11 checks the connection state again, and records the result as a flag in the RAMc 14 of the client 11 (S007). S007 is repeated while the connection with the server is maintained.

If disconnection from the server 1 is detected in S007, it is confirmed whether or not the application C has been activated by the client during connection (S008). If it has not been activated, a shortcut icon to the application C is displayed. Is deleted from the desktop screen of the client 11 (S009). When it is confirmed that the application C has been activated, it is determined that the module necessary for executing the application C has already been loaded into the RAMc 14 of the client 11 and is available on the client even after disconnecting from the server. , Do not delete shortcut icons. Similarly, it is confirmed whether or not the application D has been activated by the client (S010). If the application D has not been activated, the shortcut icon for the application D is deleted from the desktop screen of the client 11 (S01).
1). If you confirm that App D is running,
It is determined that the module necessary for executing the application D has already been loaded into the RAMc 14 of the client 11 and is available on the client even after disconnecting from the server, and the shortcut icon is not deleted. When the processing so far is completed, the process returns to S004 and repeats the processing.

FIG. 5 is a diagram showing the desktop screen after the client is disconnected from the server. In S008, the application C is started even once in a state of connection with the server, and the module of the application C is already in the client 11 The shortcut icon is left because it has already been loaded on the side, and in S010, it is determined that the application D has never been started, so that the shortcut icon is deleted from the desktop after disconnecting from the server 1. ing.

[Second Embodiment] FIG. 6 is a second flowchart for explaining the operation of the server-client system shown in FIG. First, when the client 11 is activated (S101), the connection status with the server 1 is checked immediately (S102). If the connection state is not detected, the processing of S102 is repeated. If the connection with the server 1 is detected in S102, the minimum module including the main module of the application is loaded from the server 1 into the RAMc 14 of the client 11, and the application is started (S103). When the application is started, it is already connected to the server, so that all functions of the application are enabled. FIG. 7 shows this state. In FIG.
Reference numeral 27 denotes an application screen. A toolbar for selecting an application function is displayed at the upper end of the screen, indicating that all functions are valid (available) (S104).

Next, the tool for monitoring the connection status between the server 1 and the client 11 checks the connection status, and records the result as a flag in the RAMc 14 of the client 11 (S105). If the connection state is maintained, the process returns to S104. When disconnection from the server 1 is detected, the function used by the client 11 is confirmed before disconnection (S106), and according to the determination result,
The function of the application is changed (S107), and S10
Return to 5. FIG. 8 illustrates this state. In FIG. 8, reference numeral 28 denotes a screen of an application on the client 11 after disconnection from the server 1. RAMc1 of the client 11 not used on the client 11
Since it has been confirmed that the data has not been loaded on the device 4, it is shaded after cutting, indicating that it cannot be used.

[Third Embodiment] FIG. 9 is a third flowchart for explaining the operation of the server-client system shown in FIG. First, when the client 11 is started (S201), the minimum modules including the main module of the application stored in the external storage device c16 of the client 11 are stored in the R of the client 11.
It is loaded on the AMc 14 and becomes executable (S
202). FIG. 10 shows this state. In FIG. 10, reference numeral 29 denotes a screen of the application on the client 11, and the "operation" function and the "help" function are provided in the additional module on the server. Not yet loaded on the client 11 side,
Unavailability is indicated by shading.

Next, the tool for monitoring the connection status between the server 1 and the client 11 checks the connection status, and records the result as a flag in the RAMc 14 of the client 11 (S203). If the connection is not detected, the process returns to S203, and the monitoring of the connection state is continued as it is. In this state, the application screen remains as shown in FIG. 10 (S204). If the connection is detected, the application determines that the additional module can be loaded from the server 1 and makes the functions included in the additional module available. FIG. 7 shows this state. In FIG. 7, reference numeral 27 denotes an application screen, and a toolbar for selecting an application function is displayed at the top of the screen, indicating that all functions are valid (available) (S205). .

Next, the tool for monitoring the connection status monitors whether or not the disconnection from the server has occurred (S206). If the disconnection is not detected and the connection status is maintained, the process proceeds to S20.
Return to 6 and continue monitoring. If disconnection is detected here, the function specified by the user among the additional modules at the time of connection before disconnection is checked by the user and used in the application (S207), and the function of the application is changed according to the check (S207). S208). FIG. 8 shows an example of this state. In FIG. 8, “help”, which is an additional function, is used by the client 11 during the connection and is already loaded on the RAMc 14 of the client 11. Available and
The “option” function indicates that the connection is not available after the disconnection because the connection is not used by the client 11 at the time of connection by shading it so that it cannot be selected.

[0031]

As described above, according to the present invention, when an application program existing on a server is used, the application on the server can be used even when the client is in a disconnected state and not always in a connected state. There is.

Further, when using an application program comprising a plurality of modules existing on a server, it is not necessary to be always connected to the server, and available functions are determined according to the connection state. There is an effect that the user can easily determine that it is impossible.

In an application including a plurality of modules, a minimum module including a main module required for starting the application is stored in an external storage device of the client, and a module for realizing other additional functions is stored in a server. By doing so, applications can be used even if launched in the client alone state,
In addition, by connecting to the server, the function can be expanded, and even if the connection is cut off again, there is an effect that the function in the additional module on the server can be continued to be used according to the use situation used before disconnection.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining an embodiment of a server-client system of the present invention.

FIG. 2 is a flowchart for explaining the operation of the server-client system of the present invention.

FIG. 3 is a diagram illustrating a state of a desktop when a client is started in an independent state according to the first embodiment of this invention.

FIG. 4 is a diagram illustrating a state of a desktop when a client is connected to a server according to the first embodiment of this invention.

FIG. 5 is a diagram showing a state of a desktop which has changed according to a use state before disconnection when a client is disconnected from a server and becomes a single state again in the first embodiment of the present invention.

FIG. 6 is a flowchart for explaining a second embodiment of the server-client system of the present invention.

FIG. 7 is a diagram showing one state of an application screen in the second and third embodiments of the present invention.

FIG. 8 is a diagram showing one state of an application screen in the second and third embodiments of the present invention.

FIG. 9 is a flowchart for explaining a server-client system according to a third embodiment of the present invention;

FIG. 10 is a diagram illustrating one state of an application screen according to a third embodiment of the present invention.

[Explanation of symbols]

1 server 2 server CPUs 3 server ROMs 4 server RAMs 5 server network controller s 6 server external storage device s 7 server keyboard controller s 8 server keyboard s 9 server video controller s 10 server display device s Reference Signs List 11 client 12 client CPUc 13 client ROMc 14 client RAMc 15 client network controller c 16 client external storage device c 17 client keyboard controller c 18 client keyboard c 19 client video controller c 20 client display device c 21 Client desktop screen 22 Shortcut to application A in client external storage device Icon 23 Shortcut icon to application B in external storage device of client 24 Shortcut icon to application C in external storage device of server 25 Shortcut icon to application D in external storage device of server 26 RAMc of client Shortcut icon to application C in 27 Application screen with “Option” function disabled 28 Application screen with all functions enabled 29 Application screen with “Option” and “Help” functions disabled

Claims (8)

[Claims] A first execution unit that loads a plurality of application programs on a server to a client and executes the application program; a second execution unit that executes the plurality of application programs on the client on the client; First determining means for determining whether the server and the client are currently connected; and whether the application program currently executable on the client is already loaded from the server or before loading. Or second determining means for determining whether the application is in the external storage device of the client, wherein the application is loaded from the server to the client in a connected state and is in an executable state.
A server-client system, wherein the program can be executed on the client even after disconnection from the server. 2. A third execution unit that loads a minimum module including a main module required at the time of startup from an application program including a plurality of modules existing in the server into a client and executes the module. And third determining means for determining whether or not the client is currently connected. If an attempt is made to use a function not included in the main module during execution of the loaded main module, the function is not included in the main module from the server. A fourth execution unit that loads and executes another module including a function on the client; and a fourth determination that determines which module of the main module and the other module has been loaded on the client. Means in accordance with the determination result of the third and fourth determination means. Client-server system according to claim 1, characterized in that to be able to change the function of the application program. 3. A minimum module including a main module required at the time of startup of the application program including a plurality of modules exists in the client, and the other modules exist in the server. 3. The server-client system according to claim 2, wherein 4. The server according to claim 1, wherein only a shortcut icon for starting the application program is displayed on the client side so that the application program stored on the server and the external storage device of the client can be executed on the client side. A first execution step of loading and executing a plurality of application programs on a client; displaying a shortcut icon to the program stored in an external storage device of the client on the client; A second execution step of executing a plurality of application programs on the client on the client so as to be loaded and executed on the client; and running on the client, wherein the client and the server are always connected. Or not A first determining step of determining whether the server and the client are currently connected so that the monitoring result is stored as a flag in the memory of the client; Start is instructed by the selection, loaded from the server to the client side, if it is in the memory of the client, it is judged as "loaded", it has not been loaded from the server yet, and the client side has the shortcut
If only the icon exists, it is determined to be “before loading”, and the application that is currently executable on the client is determined so that the application that originally exists in the external storage device of the client is determined to be “present in the external storage device of the client”. Second to determine whether the program is loaded from the server, before loading, or in the external storage device of the client
And a determining step of executing the server-client system. 5. When the application program is composed of a main module having a minimum function necessary for starting the application program and an additional module including an additional function, first, only the main module is loaded from a server. A third execution step of loading and executing a minimum module including a main module required at the time of startup from an application program including a plurality of modules existing in a server, and operating on the client; A third determining step of constantly monitoring whether or not the client and the server are in a connected state, and determining whether or not the server and the client are currently connected, so as to hold the monitoring result as a flag in a memory of the client. The main module during execution of the main module on the client When trying to use a function not included on the client side, a module including the function is dynamically loaded from the server to the client side so that the module can be dynamically loaded and executed. A fourth execution step of loading and executing another module including a function not included in the main module from the server to the client when an attempt is made to use a function not included in the main module; It monitors and determines which module and other modules are already loaded on the client side, and which of the main module and other modules are loaded on the client so that the determination result is held as a flag. And a fourth determination step of determining whether the Server process executing on the client system of claim 4 that. 6. Even if the client is started in a stand-alone state without being connected to a server, only functions that can be realized by a minimum module including a main module existing in the client are available. When the device is connected to a server, an additional function included in the additional module can be used by additionally loading a module existing in the server in addition to the minimum function. 6. The execution method of the server-client system according to 5. 7. A recording medium recording a program for causing a computer to execute a method for executing a server-client system, wherein the application program stored on an external storage device of the server and the client is executed on the client. A first execution step of loading and executing a plurality of application programs on the server to a client so that only a shortcut icon for starting the application is displayed on the client side, Displaying on the client a shortcut icon to the program stored in the storage device, and loading the plurality of application programs on the client on the client so that the selection causes the application to be loaded and executed on the memory of the client; A second execution step to be executed; operating on the client, always monitoring whether or not the client and the server are in a connected state, and holding the monitoring result as a flag in the memory of the client, A first determination step of determining whether the server and the client are currently connected; an application on the server is instructed to start by selecting a shortcut icon; the application is loaded from the server to the client side; If there is, it is judged as "loaded", the shortcut has not yet been loaded from the server, and the client has
If only the icon exists, it is determined to be “before loading”, and the application that is currently executable on the client is determined so that the application that originally exists in the external storage device of the client is determined to be “present in the external storage device of the client”. A second method for determining whether the program is loaded from the server, before loading, or in the external storage device of the client.
A computer-readable recording medium comprising the steps of: 8. A program for causing a computer to execute a method of executing a server-client system, the program being executed so that an application program stored on a server and in an external storage device of the client can be executed on the client. A first execution step of loading and executing a plurality of application programs on the server to a client so that only a shortcut icon for activation is displayed on the client side; and a first execution step stored in an external storage device of the client. A second icon for executing a plurality of application programs on the client on the client, such that a shortcut icon to the selected program is displayed on the client, and the selection is loaded and executed on the memory of the client. The server and the client are operating on the client, always monitor whether the client and the server are in a connected state, and retain the monitoring result as a flag on the memory of the client. A first determination step of determining whether or not the application is currently connected; and starting of the application on the server is instructed by selecting a shortcut icon. The application is loaded from the server to the client side. ] Has not yet been loaded from the server, and the client
If only the icon exists, it is determined to be “before loading”, and the application that is currently executable on the client is determined so that the application that originally exists in the external storage device of the client is determined to be “present in the external storage device of the client”. A second method for determining whether the program is loaded from the server, before loading, or in the external storage device of the client.
A program for causing each of the steps to function.