JPH076140A - Server program address managing device - Google Patents

Abstract

PURPOSE:To obtain the logical address (port number) of a server program to be required for the remote call of the server program by the retrieving processing of a client computer without inquiring the logical address to a server computer in each remote call. CONSTITUTION:When the server program 152 is started by the server computer 112. its logical address is informed to the client computer 111 and managed by a program address managing table 121. In the case of remotely calling the program 152, a client program 151 requests a program address managing means 131 to retrieve the logical address of the program 152. The means 131 retrieves the table 121 and acquires and returns the logical address. The program 151 specifies the received logical address to execute the remote call of the program 152.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a server program address management device, and more specifically, in a computer system constructed by a client computer and a server computer, a client program operating on the client computer is operated on the server computer. The present invention relates to a device that manages a logical address of a server program that is required when calling a server program that operates in.

[0002]

2. Description of the Related Art Generally, in a computer system composed of a server computer and a client computer, when a client program operating on the client computer calls a server program operating on the server computer by remote call, It is necessary to specify a logical address that is an in-computer address of a server program that is unique within the computer.

Therefore, in the past, in-computer addresses of server programs are managed in a table on the server computer, and if a request is made from a client computer,
By returning the logical address of the corresponding server program, the client program on the client computer can acquire the in-computer address of the server program. An example of the specific use of such a method is a port mapper on UNIX (registered trademark), which is a program for managing program addresses.

The port mapper manages in-computer addresses (also called port numbers) of server programs in a table called a port map. The port map is placed on the computer in which the server program exists. When the client program makes a remote call, the port mapper is first called by remote call to obtain the port number of the target server program. After the client program acquires the port number, the port number and the network address (Internet address) of the server computer will be 2
Is used to make a remote call to the server program.

[0005]

As described above, in the system in which the program address management table (port map) is placed on the server computer, every time the client program tries to make a remote call to the server program. In addition, it becomes necessary to inquire the server computer of the server program address (port number). Therefore, in an environment where a plurality of client programs remotely call a server program via the network, a remote call for obtaining the port number of the server program is added once for each remote call. As a result, the network and server computers will be overloaded.

The present invention has been proposed in view of the above circumstances, and an object thereof is to obtain a port number without performing an additional remote call for obtaining a port number. is there.

[0007]

In order to achieve the above object, the present invention requests the execution of a server program by designating a logical address of the server program to another computer via a network and receives the execution result. In a computer system that consists of a client computer that executes the requested server program and returns the results when a server program is requested to be executed by another computer, the client computer A client-side program address management table that stores the logical address of the server program that is running, together with the network address of the server computer, and a logical address of the server program that is notified from the server computer are managed by the client-side program address management table, So that and a client-side program address managing means for returning the logical address of the server program by searching the client-side program address management table in accordance with a request from the compliant program.

Here, the logical address of the server program is registered in the client-side program address management table by the server computer transmitting the logical address to the client computer at the timing when the server program is started on the server computer. In addition, a configuration is adopted in which the contents of the program address management table on the server computer side, which holds the logical addresses of each server program, etc., are collectively transmitted when the search of the client side program address management table on the client computer fails. It

[0009]

In the server program address management device of the present invention, the client computer side has a client side program address management table for storing the logical address of the server program running on the server computer together with the network address of the server computer. When the program address management means of the computer manages the logical address of the server program notified from the server computer in the client-side program address management table to request acquisition of the logical address of the server program from the client program, Search the client side program address management table and return the logical address of the server program.

[0010]

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

Referring to FIG. 1, an example of a computer system to which an embodiment of the present invention is applied is a program address management table 121 and a program address management means 131.
And a client computer 111 having a client program 151, a program address management table 122, a program address management means 132, a program address notification means 142, a server program 152,
The file access unit 162 and the server computer 112 having the notification target management file 172 are connected via a network.

Although only one client computer and one server computer are shown in FIG. 1, a plurality of client computers and server computers are generally provided.

The program address management table 121 on the client computer 111 is a table for managing the address of the server program on the server computer on the client computer 111, and has a plurality of entries as shown in FIG. Each entry has a network address 501 of the server computer that is unique in the network.
And the program address 502 of the server program that is unique in the computer, the program number 503 of the server program, the version number 504, and the identification number 505 of the transport protocol to be used, which are keys when searching the address of the server program. It has a configuration to be registered. Note that this program address management table 121, in order to enable high-speed access, is similar to the embodiment described later in the client computer 111.
It may be arranged on the cache memory.

The program address management table 122 on the server computer 112 is a table for managing the address of the server program on its own computer on its own computer, and has a plurality of entries, and each entry has the table of FIG. Data of the same type as the program address management table 121 is registered.

The notification object management file 172 is a file for registering the network address of the computer to share the information of the program address management table 122, and has a plurality of entries as shown in FIG. The network address 601 of each computer, which is unique in the network, is registered. This registration is performed by the user in advance.

FIG. 4 is a flow chart showing an example of processing of the client computer 111 and the server computer 112 shown in FIG. 1. The detailed functions and the overall operation of each part of this embodiment will be described below with reference to the drawings. To do.

When started, the server program 152 existing on the server computer 112 requests the program address management means 132 to register its own program address that is unique within the computer (301, 301 in FIG. 4).
302, 303). At this time, the program number and version number of the own program 152 are notified.

Upon receiving the request, the program address management means 132 adds the transport protocol identification number of the server program 152, the program address of the server program 152, and the self-address in addition to the program number and version number notified from the server program 152. The network address of the computer 112 is acquired from the system, and these data are stored in the program address management table 122, that is, the network address of the server computer 112, the program address of the server program 152, the program number of the server program 152, and the version number of the server program 152. And an entry containing the identification number of the transport protocol (3
At the same time, the registration contents are passed to request the program address notifying means 142 to register in another computer (305).

Upon receiving the request, the program address notifying means 142 uses the file access means 162 to read the list of network addresses of the computers existing in the notification object management file 172 (306), and the network address in the list is read. The registration contents passed from the program address management unit 132 are transmitted to the program address management unit 131 existing on each computer shown through the network to request the registration of the program address (307).

Upon receiving the registration request, the program address management means 131 causes the program address management table 121 on its own computer 111 to notify the registered contents, that is,
An entry including the network address of the server computer 112, the program address of the server program 152, the program number of the server program 152, the version number of the server program 152, and the identification number of the transport protocol is registered (308, 309).

As described above, the registration of the program address related to the activation of the server program 152 is completed (31).
0).

The same operation as described above is performed every time the server program is started on the server computer,
As shown in FIG. 2, the program address of each server program on the network is registered in the program address management table 121 on the client computer 111.

Now, after that, the client computer 111
In order for the above client program to remotely call the server program 152 on the server computer 112,
When acquiring the program address of the server program 152, the program address management means 131
The network address of the server computer 112, the program number of the server program 152, the version number, and the identification number of the transport protocol are notified and a search for the program address is requested (311).

Upon receipt of this request, the program address management means 131 searches the program address management table 121 shown in FIG. 2 using the notified data as a key, and finds the program address of the found server program 152 as the client program 152. Return to (3
12).

The client program 151 designates the program address of the returned server program 152 to call the server program 152 remotely.

In the present embodiment, when the server program 152 disappears, the program address management means 132 deletes the data related to the server program 152 from the program address management table 122 and notifies the program address of the deletion request. Means 14
2, the program address management means 131 of the client computer 111 which has issued a deletion request to each computer of the network address managed by the notification target management file 172 receives the program address management table 12
The corresponding data is deleted from 1.

If a client program that calls the server program on the local computer exists on the server computer 112, the client program retrieves the program address management table 122 to obtain the address of the server program to be called.

Referring to FIG. 5, an example of a computer system to which another embodiment of the present invention is applied is a program address management table 221, a program address management means 231, a table acquisition means 2 existing in a cache memory.
41 and a client computer 211 having a client program 251 and a server computer 212 having a program address management table 222, a program address management means 232 and a server program 252 are connected by a network.

Although only one client computer and one server computer are shown in FIG. 5, a plurality of client computers and server computers are generally provided.

The program address management table 221 on the client computer 211 is a table for managing the address of the server program on the server computer on the client computer 211, and is placed in a cache memory (not shown). Note that the contents of the program address management table 211 are the same as those of the previous embodiment shown in FIG. 2, and have a plurality of entries, and each entry has a network address 501 of the server computer that is unique in the network. And the program address 502 of the server program that is unique in the computer, the program number 503 of the server program that serves as a key when searching the address of the server program, and the version number 5
04 and the identification number 505 of the transport protocol to be used are registered.

The program address management table 222 on the server computer 212 is a table for managing the address of the server program on its own computer on its own computer, and like the program address management table 221, it has a plurality of entries. Then, the same data as the program address management table 121 of FIG. 2 is registered in each entry.

FIG. 6 is a flow chart showing an example of processing of the client computer 211 and the server computer 212 shown in FIG. 5, and the detailed functions and the whole operation of each part of this embodiment will be described below with reference to the drawings. To do.

When started, the server program 252 existing on the server computer 212 requests the program address management means 232 to register its own program address which is unique within the computer (401, 401 in FIG. 6).
402, 403). At this time, the program number and version number of the own program 252 are notified.

Upon receiving the request, the program address management means 232, in addition to the program number and version number notified from the server program 252, the identification number of the transport protocol of the server program 252, the program address of the server program 252 and its own The network address of the computer 212 is acquired from the system, and these data are stored in the program address management table 222, that is, the network address of the server computer 212, the program address of the server program 252, the program number of the server program 252, and the version number of the server program 252. And an entry including the transport protocol identification number is registered (404).

As described above, the registration of the program address related to the activation of the server program 252 is completed (40
5).

The same operation as above is performed by the server computer 212.
The program address management table 222 on the server computer 212 registers the program address and the like of each server program running on its own computer by being executed each time the server program is started.

Now, after that, the client computer 211
The upper client program 251 is the server computer 2
When the program address of the server program 252 is acquired in order to remotely call the server program 252 on 12, the network address of the server computer 212, the program number of the server program 252, and the version number of the program address management unit 231 are acquired. Then, the identification number of the transport protocol is notified and a search for the program address is requested (411).

Upon receiving this request, the program address management means 231 searches the program address management table 221 in the cache memory using the notified data as a key, and if it exists, the program address of the server program 252 is used by the client. It is returned to the program 251 (412, 415).

On the other hand, if it does not exist, the program address management means 231 issues a list transmission request of the program address management table 222 on the server computer 212 to the table acquisition means 241.

Table acquisition means 2 receiving this request
41 requests the program address management means 232 of the server computer 212 to transmit a list of the program address management table 222 (413), and in response to this request, the program address management means 232 returns the entire contents of the program address management table 222. When it comes (406, 4
07), and notifies it to the program address management means 231.

When the program address management means 231 receives the list of the program address management table 222 from the table acquisition means 241, it registers this in the program address management table 231 and the server program that satisfies the previous search request in the list. Whether or not the program address of 252 exists is searched again, and if there is, the program address is returned to the client program 251 (414, 415). If it does not exist in this list, the client program 251 is notified that it does not exist in the table (416).

The client program 251 designates the acquired program address of the server program 252 to call the server program 252 remotely.

In this embodiment, when the server program 252 disappears, the program address management means 232 erases the data related to the server program 252 from the program address management table 222. On the other hand, the client program 25
When the remote call of the server program 252 executed in step 1 is abnormally terminated due to the disappearance of the server program 252, the table acquisition means 241 causes the program address of the server computer 212 to operate in the same manner as when the search fails in the program address management means 231. The list of the management table 222 is acquired, and the program address management means 231 rewrites the contents of the program address management table 221.

If a client program that calls the server program on the local computer exists on the server computer 212, the client program retrieves the program address management table 222 to obtain the address of the server program to be called.

[0045]

As described above, according to the present invention, the following effects can be obtained.

Since the program address of the server program running on the server computer is managed by the program address management table on the client computer, the client program operating on the client computer can execute the server program on another computer. When making a remote call, it is not necessary to search the program address management table on the server computer, but only the program address management table on the local computer. Therefore, the acquisition of the program address of the server program is speeded up.
As a result, the remote call processing is speeded up.

By performing the search on the client computer, the load of the network and the server computer where the processing is likely to be concentrated can be partially taken over by the client computer, and in a computer system in which many computers are connected via the network. , The whole process can be speeded up.

In the configuration in which the list of program address management tables of the server computer is collectively obtained by the table obtaining means, the efficiency of the entire system is higher than that in the case where the program address is obtained each time each server program is started. Therefore, the processing of the entire system is speeded up.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts of a computer system to which an embodiment of the present invention is applied.

FIG. 2 is a diagram showing an example of contents of a program address management table.

FIG. 3 is a diagram showing an example of contents of a notification target management file.

FIG. 4 is a flowchart showing a processing example of a client computer and a server computer in the embodiment of FIG.

FIG. 5 is a main part configuration diagram of a computer system to which another embodiment of the present invention is applied.

FIG. 6 is a flowchart showing a processing example of a client computer and a server computer in the embodiment of FIG.

[Explanation of symbols]

111, 211 ... Client computer 112, 212 ... Server computer 121, 122, 221, 222 ... Program address management table 131, 132, 231, 232 ... Program address management means 142 ... Program address notification means 151, 251 ... Client program 152, 252 ... Server program 162 ... File access means 172 ... Notification target management file

Claims (7)

[Claims] 1. A client computer that requests execution of a server program by designating a logical address of the server program to another computer via a network, and a execution of the server program is requested from another computer. By doing so, in a computer system consisting of a server computer that executes the requested server program and returns the results, the client computer is given the logical address of the server program running on the server computer along with the network address of the server computer. The client side program address management table to be stored and the logical address of the server program notified from the server computer are managed in the client side program address management table, and the client side program address management table is used in accordance with the request from the client program. A server program address management device comprising: a client program address management unit that searches the ant program address management table and returns the logical address of the server program. 2. The server program address management device according to claim 1, wherein the server computer is provided with a program address notifying means for notifying the client computer of the logical address of the server program started in the own computer. 3. A server computer is provided with a notification target management file that holds a network address of a client computer that is a target of notification of a logical address of a server program running on its own computer, and the program address notifying means is a server program 3. The server program address management device according to claim 2, wherein the server program address management device is configured to notify the client computer of the network address held in the notification target management file of the logical address. 4. A server-side program address management table for storing, in the server computer, the logical address of the server program running on the computer together with the network address of the computer, and the logical address when the server program is started on the computer. 4. The server program address management means according to claim 3, further comprising server side program address management means for managing the server side program address management table and notifying the client computer of the logical address by the program address notifying means. apparatus. 5. The server program address management device according to claim 4, wherein the client side program address management table is arranged in a cache memory of a client computer. 6. A server computer program address management table for storing, in a server computer, a logical address of a server program running on the computer together with the network address of the computer, and a list request from the client computer,
A server side program address management means for returning a list of the server side program address management table, and a table acquisition means for requesting a list of the server side program address management table to the client computer, The client side program address management means acquires a list of the server side program address management table by the table acquisition means when the logical address of the corresponding server program does not exist as a result of the search, and acquires the client side program address management table. 2. The server program address management device according to claim 1, wherein the server program address management device has a configuration in which the server program address management device performs registration again and searches again. 7. The server program address management device according to claim 6, wherein the client side program address management table is arranged in a cache memory of a client computer.