JP2003288239A - Management method for partitioning use of storage, its server, and client system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve system performance and to make maximum use of a high-capacity storage by managing exclusive access control of a virtual partition by a plurality of log-in users in collective management in a database and maintaining log-in information on the client side. <P>SOLUTION: This server system is constructed of a virtual partition allocation part 10 setting the virtual partition in a storage 4 and allocating the virtual partition to a group with registered users and an exclusive access control part 20 performing exclusive access control of the virtual partition by a plurality of log-in users on the virtual partition having a usage condition set for each group. The log-in information is maintained on the client side, and when log-in to the server is carried out by using the long-in information, use of the allocated virtual partition is allowed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage division utilization management method suitable for a file system capable of sharing files, a server and client system thereof, and a recording medium on which the method is programmed and recorded.

[0002]

2. Description of the Related Art When a file transfer service is provided between a plurality of systems on a network, file management is important in addition to sending and receiving files. NFS (Network File System), UNIX as a file system
(Registered trademark) type ftp, Windows (registered trademark)
System file sharing system is famous. Each of the above file systems has a function of sharing information in common, but the usage unit is a user or host, and when storage is allocated in groups, the usage conditions can be set or changed. There are some things and some things that cannot be done. Conventionally, they are used properly according to the features of the application.

By the way, when the file transfer is considered as a service, it is essential to support the file access function. The file access function is a file access function such as opening, closing, creating, deleting, and updating of a file, and these are file management functions on the transmission / reception side rather than file transfer. At this time, what is important is exclusive control of the file when writing, and without this, the intended processing is changed to another processing by one file transfer, and the processing result cannot be guaranteed.

[0004]

Recently, a server storage rental business has become a hot topic. A virtual partition is set in storage of a so-called server, and is assigned to a group in units of the unit, and the virtual partition is shown as virtual storage to each user registered in the group. At this time, the most important design item is exclusive control when the above-mentioned information is simultaneously accessed. Conventionally, this exclusive control is controlled by using a lock file unique to each file, and the exclusive information held as a lock file is scattered, so recovery (initialization) at the time of system failure is not easy. It was In order to solve this, if lock files are aggregated and centrally managed, as the number of files to be handled increases, the search time for the target lock file increases, the processing speed decreases, and the system performance decreases.

On the other hand, as the connection form of the client to the server, the wired form has been the mainstream until now, but the use form by mobile has increased, and the wireless connection is rapidly increasing. As is well known, in the case of wireless connection, the network is often disconnected, and if the network connection is cut off, the client needs to log in to the server again, it takes time to restart, The workability was poor.

The present invention has been made in view of the above circumstances. In a file sharing use environment in which a virtual partition is set in the storage of a server and the virtual partition is assigned to a group in which users are registered, the use status of the virtual partition It is possible to improve system performance by managing the exclusive access control of virtual partitions by multiple logged-in users in a database in a centralized manner and by retaining login information on the client. An object of the present invention is to provide a method for managing divided use of storage, a server and a client system for the method, and a recording medium on which the method is programmed so that the capacity storage can be used without waste.

[0007]

In order to solve the above-mentioned problems, the present invention is a divided usage management method of a storage that shares a file, wherein a virtual partition is set in the storage of the server, and the virtual partition is set. Is provided to a group in which users are registered, usage conditions are set for each group in the virtual partition, and a shared use management method for storage is provided in which exclusive access control of virtual partitions is performed by the plurality of logged-in users.

Further, in the storage division utilization management method of the present invention, at least one virtual partition name, capacity, and
Register the usage conditions including exclusive information in the database,
When updating the usage conditions, it is characterized in that the availability of changes is determined and checked by referring to the database and checking the usage status of the storage.

Further, in the storage division utilization management method of the present invention, the exclusive access control of the virtual partition is performed by referring to the database in which the exclusion information of the target information is registered and determining whether the command can be executed. It is characterized by performing.

Further, in the storage division utilization management method of the present invention, the login information is held in the client,
It is characterized in that the use of the allocated virtual partition is permitted by logging in to the server using the login information.

In order to solve the above problems, the present invention provides
A server system for managing shared use of a storage sharing a file, wherein a virtual partition is set in the storage, a virtual partition assigning unit assigning the virtual partition to a group in which a user is registered, and usage conditions are set for each group. A server system comprising: an access control unit that controls exclusive access to the virtual partition by the logged-in plurality of users.

Further, in the server system of the present invention,
The virtual partition allocating means is provided with a database in which a usage condition including at least a virtual partition name, capacity, and exclusive information is set and registered as one of group information at the time of group registration, and the database is used when updating the usage condition. It is characterized in that the availability of the change is determined by checking the usage status of the storage with reference to, and the updated usage condition is recorded in the database.

In the server system of the present invention,
The access control means uses the file name, session I
It is characterized in that it has a database of D and an exclusive mode and records the record, and whether or not the command can be executed is determined by referring to the database.

According to the above configuration, in the file sharing use environment in which the virtual partition is set in the storage of the server and the virtual partition is assigned to the group in which the user is registered, the usage status of the virtual partition according to the usage state of the group Changes can be facilitated. Also,
Centralized management of exclusive control enables quick recovery work at the time of failure, eliminating the increase in the search time of exclusive control due to the increase in the number of handled files, which occurs when centrally managing lock files in the past. Therefore, the processing speed is not adversely affected and the system performance is improved. Further, since the client holds the login information, the trouble of re-login is saved even if the network is disconnected, and the workability is improved.

In order to solve the above problems, the present invention provides
A program for a server system that manages divided use of storage, wherein the server program sets a virtual partition in the storage of the server system, and assigns the virtual partition to a group in which a user is registered; A program for causing a computer to execute a step of performing exclusive access control of the virtual partition by the plurality of logged-in users with respect to the virtual partition for which the usage condition is set in units.

In the server system program of the present invention, the step of assigning the virtual partition to the group in which the user is registered further includes the step of receiving a group registration request issued from the client, and the group registration based on the request. The step of requesting command execution, the step of acquiring the current storage usage from the database, determining the virtual partition creation position of the group to be newly registered, and creating the virtual partition, and at least the virtual partition name and capacity. , And a step of registering group information including exclusive information.

In the program for the server system of the present invention, the step of assigning the virtual partition to the group in which the user is registered further comprises the step of receiving a user addition request from the client, and a user addition command based on the request. And a step of registering new user information including a user name, a group name, and a password in the database.

In the server system program of the present invention, the step of assigning the virtual partition to the group in which the user is registered further includes the step of receiving a request for changing the usage condition from the client, and the usage condition based on the request. The step of requesting the execution of the change command, the step of acquiring the current storage usage status from the database and confirming whether the usage conditions can be changed, and the usage conditions can be changed and the virtual partition is moved. In that case, the step of accessing the virtual partition, moving the stored contents to a new partition, releasing the current area, and updating the group information including at least the virtual partition name and capacity of the changed database Characterized by including steps ing.

In the program for the server system of the present invention, the step of performing the exclusive access control further includes a step of receiving a command issued from the client and a thread generation request corresponding to each command. A step of inquiring of the database whether or not the command can be executed by the exclusion information, a step of permitting access to the virtual partition when the command execution is possible, and updating group information of the database including exclusion information for exclusive control. It is characterized by including the step of updating the group information of the database that needs to be changed when the command execution is completed, and the step of notifying the requesting client of the execution result of the command. The present invention also provides a computer-readable recording medium in which the above-mentioned program for the server system is recorded.

In order to solve the above problems, the present invention provides
A program for a client system connected to a server system that manages divided use of storage,
The step of issuing a login request to the server, the step of generating an authentication result from the server to generate and retain a login process resident in the client, and the step of retaining the login process, and obtaining the information used for the login request from the resident login process And a step of issuing a command execution request to the server. The present invention also provides a computer-readable recording medium recording the program for the client system described above.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a connection environment of a system in which a storage division utilization management method according to the present invention is realized. As shown in FIG. 1, it is possible to set a virtual partition in the storage 4 of the server 1 and to assign it to a group in that unit so that each user registered in the group can see the virtual partition as a virtual storage. Note that 3 is a network, and the storage 4 is a storage area in which virtual partitions are logically stored. Here, user # 0 and user # 1 as group A and user # as group B
Register # 2 and # 3, and create virtual partition A in group A
Is shown as being assigned to the virtual partition B in group B.

FIG. 2 is a block diagram showing the functional expansion of the configuration of a system that realizes the storage division use method according to the present invention. In the figure, the blocks with the same numbers as in FIG. 1 are the same as those in FIG. In FIG.
The server 1 includes a management application 11, a storage 4, a database (DB) 12, a server application 13, and a communication library 14.

The management application 11 is an application program for an administrator to execute a command on the server 1, and the DB 12 stores virtual partition information, group information, and user information. The server application 13 is an application program that executes commands. The server application 13 starts up the system and executes various function commands by executing the following procedures.
That is, a process is activated by the system activation command in the management application 11 to execute initialization processing, and then the server application is activated as a resident process. Further, by the command received from the client application 22 described later, a thread corresponding to each command is generated in the server application 13 and each function command is executed. Then, the server application 13 and the management application 11
The system termination process is performed by communicating between the processes started by the system termination command in 1. and terminating the resident process. Here, the thread is a concept when a plurality of processes existing in the computer at the same time are further abstracted and regarded as objects.
The communication library 14 controls transmission / reception of messages,
Performs socket communication that handles interprocess communication.

The client 2 has a communication library 21.
, A client application 22 and a local disk 23. The communication library 21 is the same as the communication library 14 in the server 1, and the client application 22 includes
Is an application program for executing commands. The local disk 23 is a storage area held by the user.

FIG. 3 is a diagram cited for explaining the function provided by the server according to the present invention. The server 1 is divided into a virtual partition allocation unit 10 and an exclusive access control unit 20 if the parts related to the present invention are functionally classified. The virtual partition allocation unit 10 has a function of setting a virtual partition in the storage 4 and allocating the virtual partition to a group in which users are registered. In addition, the access control unit 20 sets the virtual partition for which the usage condition is set on a group basis,
It has a function to control exclusive access to virtual partitions by multiple logged-in users. At the time of group registration, the virtual partition assigning unit 10 sets and registers a usage condition including at least a virtual partition name, capacity, and exclusive information as one of the group information, and when updating the usage condition, the usage status of the storage 4 is indicated. By confirming it is decided whether or not the change is possible, and the database to be updated and the user name, group name, when adding the user,
Contains a database that stores user information consisting of passwords. Further, the exclusive access control unit 20 has a file name, a session ID, and an exclusive mode as a record, and includes a database that determines whether or not a command can be executed by referring to the record. The database included in the virtual partition allocation unit 10 and the access control unit 20 is shown as DB 12 here.

Each processing procedure of the server 1 for group registration, user addition, use condition change, and information access requested by the user will be described in detail below with reference to FIGS. 4 to 7. Here, the group information includes a virtual partition name, allocated capacity, used capacity, RAID (Redundant Array of Inexpensive D).
isks) level, exclusive information, and user information means a user name, group name, and password.

First, the processing of the group registration request issued by the user will be described with reference to FIG. First, the user requests the administrator to register the group (1).
Upon receipt of this, the administrator requests execution of the group registration command of the management application 11 (2). As a result, the management application 11 acquires the current storage usage status from the DB 12, determines the virtual partition creation position of the group to be newly registered, and creates the virtual partition. (3,4). Then, group information including a virtual partition name, allocated capacity, RAID level, etc. is registered in the DB 12. (5)

Next, user addition will be described with reference to FIG. First, the user requests the administrator to add a user (1). In response to this, the administrator requests execution of the user addition command of the administrator application (2). Then, new user information including a user name and a password is registered in the DB 12 (3).

Next, the change of the group use condition will be described with reference to FIG. First, the user requests the administrator to change the usage conditions (1). Upon receipt of this, the administrator requests execution of the use condition changing command of the management application (2). By this, DB1
The current usage status of the storage is acquired from 2 and it is confirmed whether the usage conditions can be changed (3). Here, whether the change is possible or not can be determined by whether the capacity can be changed from the current capacity of the storage 4, whether there is a file in the virtual partition to be changed that is exclusively controlled, and cannot be changed immediately. Based on. If you can change the usage conditions and move the virtual partition,
The virtual partition is accessed, the stored content is moved to a new partition, and the current area is released (4). Further, the group information including the changed virtual partition name, allocated capacity, RAID level, etc. of the DB 12 is updated (5).

Finally, a procedure for the user to access the information on the server 1 will be described with reference to FIG. First, user authentication is performed. That is, the client application 22 issues a login command, and the communication library 21 transmits a message (1, 2). In response to this, the communication library 14 issues a login thread generation request to the server application 13 (3), and D
An inquiry for user authentication is sent to B12 (4). When the authentication is obtained, various commands for information acquisition, registration, and operation by the client application 22 are issued (5). Then, a message is issued via the communication library 21 of the client 2 (6), and the communication library 14 of the server 1 receiving the message via the network 3
A thread generation request corresponding to each command is issued to the server application 13 (7), and the server application 13 inquires of the DB 12 whether or not a command can be executed based on exclusive information or the like (8).

Here, if the command can be executed, access to the virtual partition of the storage 4 is permitted,
Of the group information in the DB 12, the used capacity and others are updated (10). Then, the execution result is notified to the client application 22 via the server application 13, the communication library 14, and the communication library 21 (11, 12, 13). On the other hand, if command execution is impossible due to exclusive control or lack of capacity, the client application 22 is notified according to the above-described route that command execution is impossible. The details of exclusive control and the details of login will be described later.

As described above, here, in sharing file information, the following six functions, which were conventionally realized or could not be realized individually, are provided in a single form, and the storage is divided and used. Has been realized. That is, firstly, it is possible to use in units of users, and it is not necessary to set in units of hosts because it is not in units of hosts. This is achieved by performing group registration and adding users in the same group. Second
In addition, it is possible to share information only for users registered in the group. This is realized by referring to the DB 12 that stores group information and user information when the user accesses the information of the server 1.

Third, the existence is hidden from other groups. This is realized by acquiring the group name at the time of user authentication and referring only to the information of the group to which the user belongs based on it. Fourthly, various usage conditions can be set for the virtual partition. This is realized by setting a usage condition as one of the group information at the time of group registration. Fifth, the usage condition of the virtual partition can be easily changed. This is realized by acquiring the current usage status of the storage from the DB 12, confirming whether the usage conditions can be changed, and updating the usage conditions. Sixth, since it has an exclusive control function for information, it is possible for a plurality of users to simultaneously access virtual partitions to which they are assigned. This is realized by referring to the DB 12 storing exclusive control information as one of the group information when the user accesses the server information.

Exclusive control will be described with reference to FIG. What is characteristic here is that the exclusive control is centrally managed by the DB 12. When a user issues a client command to generate a server command execution request, the processing procedure of the server is as follows.
That is, the server application 13 first receives a command execution request via the communication library 14 (1). As a result, the server application 13
Generates a command thread (2) and acquires exclusive information of the target information (file) (3). Here, at the time of non-exclusive, a command can be executed to access the information in the storage 4, and after the command is executed, the execution result is notified to the client (4,5, 6, 7). That is, when the target information is not exclusive, access to the virtual partition is permitted, and the group information in the database 12 including the exclusive information is updated for exclusive control of the target information (4). Next, by executing the command, the target information stored in the storage 4 is accessed and a predetermined process is performed (5). Then, after the command is executed, the group information of the database 12 that needs to be updated with the execution of the command is updated (6), such as releasing the exclusive control to the target information. Then, the command execution result is notified to the client (7). On the other hand, when the target information is exclusive (3), the command cannot be executed, and the client is notified that the command cannot be executed (7).
Here, the exclusive information is a file name, a session ID,
A table is configured with the exclusive mode as a record and is registered in the DB. Here, as the exclusive mode, "1"
Is read-only when, and read-write is prohibited when "2".

Next, the login operation will be described with reference to FIG. Here, the characteristic feature is that the client holds the login information. The processing procedure of the server 1 when the user logs in is as follows. That is, first, the user issues a login request at the client (1). This is transmitted to the server application 13 via the communication library 14 (2), and the server application 13 generates a login thread (3). As a result, the server application 1
3 inquires of the DB 12 about user authentication (4). The server application 13 obtains the authentication result and notifies the client 2 of the authentication result via the communication library 14, the network 3, and the communication library 21 (5). Then, at this time, the client 2 causes the client application 22 to generate a login process consisting of the authenticated user name, password, group name, and current path, and make it resident (6).

The communication procedure between the command process and the login process will be described below. First, the client side will be described with reference to FIG. First, it is assumed that the user issues each command of information acquisition, registration, and operation on the client 2 (1). The command process (file list, file copy, file deletion, directory creation, etc.) created for each command is
The login information of the user is acquired by communicating with the resident login process (2). After acquiring the login information, each command process issues a command execution request to the server 1 through the communication library 21 (3).

Next, regarding the procedure on the server 1 side, FIG.
Will be described with reference to. On the server 1 side, the server application 13 first receives the command execution request (1). Then, the server application 13
Thread corresponding to the received command (file list,
(File copy, file deletion, directory creation, etc.)
Is generated and an inquiry is made to the DB 12 as to whether or not a command such as exclusive information can be executed (2, 3). Then, the command is executed to access the information in the storage 4 (4). At this time, the group information in the DB 12 is updated and the command execution result is notified to the client 2 (5, 6).

The programs for realizing the functions of the virtual partition allocation unit 10 and the exclusive access control unit 20 shown in FIG. 3 are recorded on a computer-readable recording medium and recorded on this recording medium. The storage division utilization management system is constructed by causing the computer system constituting the server to read the program and sequentially reading and executing the program. The computer system mentioned here includes an OS and hardware such as peripheral devices.

Further, the computer system also includes a homepage providing environment (or display environment) if the WWW system is used. Further, the computer-readable recording medium refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, the computer-readable recording medium is, for example, a volatile memory (RAM) inside a computer system which serves as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line.
Those that hold the program for a certain period of time are also included.

The above program may be transmitted from a computer system that stores the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the program may be a program for realizing some of the functions described above. further,
It may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and includes a design etc. within the scope not departing from the gist of the present invention. Be done.

[0042]

As described above, according to the present invention, the exclusive control is centrally managed so that the recovery work in the event of a failure can be speeded up, which conventionally occurs when the lock files are aggregated and centrally managed. Since the search time for exclusive control does not increase with the increase in the number of files handled, the processing speed is not adversely affected and the system performance is improved. Further, since the client holds the login information, the trouble of re-login is saved even if the network is disconnected, and the workability is improved. Further, according to the present invention, when sharing file information, (1) a mechanism that can be used on a user-by-user basis, which was conventionally realized or could not be realized, and (2) only users registered in a group Information sharing mechanism, (2) mechanism that hides the existence from other groups, (3) mechanism that enables various usage conditions to be set in the virtual partition and facilitates changes, (4) exclusive control of information It has a single function that allows multiple users to simultaneously access virtual partitions to which it has been assigned, and then realizes the divided use of storage. That is, by performing group registration and adding users in the same group, it is possible to use in units of users, and there is no need to set in units of hosts because they are not in units of hosts. In addition, the user
By accessing the DB 12 storing the group information and the user information when accessing the information, the information can be shared only by the users registered in the group.
Further, by acquiring the group name at the time of user authentication and referring to only the information of the group to which the user belongs based on it, the existence is hidden from other groups. Also, various usage conditions can be set for the virtual partition. This is realized by setting a usage condition as one of the group information at the time of group registration. Furthermore, the usage conditions of the virtual partition can be easily changed. This is achieved by acquiring the current usage status of the storage from the database, checking whether the usage conditions can be changed, and updating. Further, since it has an exclusive control function for information, it is possible to simultaneously access virtual partitions to which a plurality of users are assigned. This is realized when the user accesses the information of the server by always referring to the database storing the exclusive control information as one of the group information.

[Brief description of drawings]

FIG. 1 is a diagram showing a connection environment of a system in which a storage division utilization management method according to the present invention is realized.

FIG. 2 is a block diagram showing a functional expansion of the configuration of a system that realizes the method for dividing and using storage according to the present invention.

FIG. 3 is a diagram cited for explaining a function provided by a server system according to the present invention.

FIG. 4 is a diagram cited to explain a processing procedure of the server system according to the present invention.

FIG. 5 is a diagram cited for explaining a processing procedure of the server system according to the present invention.

FIG. 6 is a diagram cited for explaining a processing procedure of the server system according to the present invention.

FIG. 7 is a diagram quoted for explaining a processing procedure of the server system according to the present invention.

FIG. 8 is a diagram cited for explaining a processing procedure of the server system according to the present invention.

FIG. 9 is a diagram cited to explain a processing procedure of the client system according to the present invention.

FIG. 10 is a diagram cited for explaining a processing procedure of the server system according to the present invention.

FIG. 11 is a diagram cited for explaining a user login processing procedure according to the present invention.

[Explanation of symbols]

1 Server 2 Client 3 Network 4 Storage 10 Virtual Partition Allocation Unit 11 Management Application 12 Database (DB) 13 Server Application 14, 21 Communication Library 20 Exclusive Access Control Unit 22 Client Application 23 Local Disk

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiyoshi Sato             1-9-1, Konan, Minato-ku, Tokyo             IT Comware Co., Ltd. F term (reference) 5B065 BA01 ZA01                 5B082 CA01 CA19 FA17

Claims (15)

[Claims] 1. A method of managing shared use of storage sharing a file, wherein a virtual partition is set in the storage of a server, the virtual partition is assigned to a group in which users are registered, and the virtual partition is used in group units. A divided use management method for a storage, wherein conditions are set and exclusive access control of a virtual partition is performed by a plurality of logged-in users. 2. When registering the group, as one of the group information, at least a virtual partition name, a capacity,
It is characterized in that the use condition including exclusive information is set and registered in the database, and when the use condition is updated, whether or not the change is possible is determined and confirmed by checking the use condition of the storage by referring to the database. The storage management method according to claim 1. 3. The exclusive access control of the virtual partition is performed by referring to a database in which exclusive information of target information is registered and determining whether or not a command can be executed. Management method of storage of each. 4. The client holds login information,
2. The storage divided use management method according to claim 1, wherein the use of the allocated virtual partition is permitted by logging in to the server using the login information. 5. A server system for managing shared use of a storage sharing a file, wherein a virtual partition is set in the storage, and the virtual partition assigning unit assigns the virtual partition to a group in which a user is registered, and a group unit. A server system comprising: an access control unit that performs exclusive access control of the virtual partition by the plurality of logged-in users to the virtual partition for which the usage condition is set. 6. The virtual partition allocating means is provided with a database in which a use condition including at least a virtual partition name, capacity, and exclusive information is set and registered as one of group information when registering a group, and the use condition is updated. 6. The server system according to claim 5, wherein when performing, the availability of the change is determined by referring to the database and checking the usage status of the storage, and the updated usage condition is recorded in the database. 7. The access control means has a file name, a session ID, and an exclusive mode as a record, and has a database for recording the record, and determines whether or not a command can be executed by referring to the database. The server system according to claim 5. 8. A program for a server system that manages divided use of storage, comprising the steps of setting a virtual partition in the storage of the server system and allocating the virtual partition to a group in which users are registered. A program for causing a computer to execute a step of performing exclusive access control of the virtual partition by the plurality of logged-in users with respect to the virtual partition for which the usage condition is set in units. 9. The step of assigning the virtual partition to a user-registered group further comprises the steps of receiving a group registration request issued from a client, making a request to execute a group registration command based on the request, and a database. From the current storage usage status to determine the virtual partition creation position for the group to be newly registered, create the virtual partition, and register the group information including at least the virtual partition name, capacity, and exclusive information The program according to claim 8, further comprising a step. 10. The step of assigning the virtual partition to a user-registered group further comprises the step of receiving a user addition request from a client, the step of requesting execution of a user addition command based on the request, and the database: 9. The program according to claim 8, further comprising the step of registering new user information including a user name, a group name, and a password. 11. The step of assigning the virtual partition to a user-registered group further comprises the steps of receiving a usage rule change request from a client, requesting execution of a usage rule change command based on the request, and a database. Get the current usage status of storage from and confirm whether the usage conditions can be changed.If the usage conditions can be changed and the virtual partition is moved, access the virtual partition. , Moving stored content to a new partition to release the current area, and updating group information including at least a virtual partition name and capacity of the changed database. The program according to item 8. 12. The step of performing exclusive access control further comprises the steps of receiving a command issued from a client, issuing a thread generation request corresponding to each command, and determining whether or not a command can be executed based on exclusive information. Inquiring the database, allowing access to the virtual partition when the command can be executed, updating the group information of the database including exclusive information for exclusive control, and the change is required when the command execution is completed. 9. The program according to claim 8, further comprising a step of updating group information of the database, and a step of notifying a requesting client of a command execution result. 13. A program for a client system connected to a server system that manages divided use of storage, the step of issuing a login request to the server, and resident in the client after obtaining an authentication result from the server. A program for causing a computer to execute a step of generating and holding a login process, and a step of acquiring information used for a login request from the resident login process and issuing a command execution request to the server. 14. A recording medium for recording a server program for a server system for managing divided use of storage, wherein the server program sets a virtual partition in the storage of the server system, and the virtual partition is set by a user. A server program that causes a computer to execute a step of allocating a group to a registered group and a step of performing exclusive access control of the virtual partition by the plurality of logged-in users with respect to the virtual partition for which the usage condition is set for each group. Computer-readable recording medium. 15. A recording medium in which a client program for a client system connected to a server system that manages divided use of storage is recorded, the client program issuing a login request to a server, Generating an authentication result from the server and generating and holding a login process resident in the client; and acquiring information used for the login request from the resident login process and issuing a command execution request to the server. And a computer-readable recording medium recording a client program that causes a computer to execute the steps.