JP2000047953A - Remote file control device - Google Patents

Abstract

(57) [Summary] In a remote file control device to which a plurality of higher-level devices are connected, it is necessary to clarify on which higher-level device a remote transfer environment such as a communication path and a volume correspondence relationship has been set. Suppress the occurrence of troubles based on cancellation. A plurality of upper devices A and B and a storage device 6 are provided.
0, 6-1 and these higher-level devices A, B and storage device 6-
0, 6-1 and a remote file control device 1 having transmission path forming means for forming a communication path with the other center
, Communication path management information holding means TM-0, T for holding a higher-level device from which a communication path is set.
Volume management information holding means TM for holding M-1 and a volume correspondence set by which higher-level device.
−0 and TM-1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In a computer system having a sub-computer center having the same file as a file of a main computer center, which data from which higher-level device of the main computer center passes through which communication path to the sub-center. Then, the present invention relates to a remote file control device for controlling whether to transmit.

[0002]

2. Description of the Related Art For example, a disaster such as an earthquake occurs in an area where a computer center is located and data stored therein may be damaged, thereby impairing the function of the center. To prevent this, a sub-computer center (hereinafter referred to as “sub-center”) is set up in a different area from the main computer center (hereinafter referred to as “sub-center”). It is required to act on your behalf. In this case, it is necessary to provide a file equivalent to the file of the main center also on the sub-center side. The function of creating a file equivalent to the file of the main center is referred to as a remote file in the following description.

[0003] To realize a remote file, a conventional file transfer by CPU communication between the main center and the sub-center, a remote file control device for controlling a file at the main center, and a remote file control for controlling a file at the sub-center are provided. Methods such as file transfer between apparatuses, transfer of a file from a main center to a sub-center by transporting a replaceable medium such as a magnetic tape, and the like are conceivable.

At present, when considering the time difference between the file contents of the main center and the sub-center, the change of the application program, and minimizing the load increase due to the file transfer of the CPU in the main and sub-centers, the above-mentioned remote control is considered. Attention has been paid to a method based on file transfer between file control devices. That is, in the above-mentioned method, there is a problem that a large capacity memory is required for the primary and secondary CPUs, a load on the CPU is increased, and the like, for the file transfer by the CPU communication between the primary and secondary CPUs. In the method, there is a problem that the time difference of the file contents between the primary and secondary centers becomes large.

The outline of file transfer between remote file control devices (hereinafter, referred to as file control devices) will be described with reference to FIG. In FIG. 7, the main center is a higher-level device A, a higher-level device B, a file control device 50, a task / resource management module 51, channel interface modules 52-0 and 52-1, and transmission line interface modules 53-0 and 53. -1,... 53-M,
It comprises a device interface module 54, a storage device 55 and the like.

[0006] Similarly, the sub-center is composed of a host device C, a host device D, a file control device 60, a task / resource management module 61, a channel interface module 62-
0, 62-1, transmission line interface module 63
63-M, a device interface module 64, a storage device 65, and the like.

Also, 56-0, 56-1 ... 56-M and 66-0, 66-1 ... 66-M are routers,
The transmission path between the main center and the sub center is selectively connected. Then, when performing file transfer between the control devices between the file control device 50 of the main center and the file control device 60 of the sub-center, as described later, the setting between the file control devices is performed from the host device. At this time, the file transfer operating environment used previously is deleted, and a new operating environment is set.

[0008] This setting includes setting of a volume for designating a file to be associated with a file at the main center when transferring data to the sub-center, and setting of a volume at the time of transferring data over the transmission line. Transmission line interface
Which transmission line interface module of the modules 53-0, 53-1 ... 53-M and which transmission line interface module 63-0, 63 of the sub-center.
-1... 63-M are set for a communication path that specifies whether to associate them with 63-M.

When these settings are issued from a host device at the main center, the file control device 50 at the main center
After communicating with the file control device 60 of the sub-center connected by the designated communication path and synchronizing the setting information between the two file control devices 50 and 60, that is, after setting is completed, File transfer to the designated volume of the sub center is enabled.

[0010]

However, in the prior art, the setting of the communication path and the setting of the volume correspondence are performed in a single file control device by setting each of the upper device A and the upper device B. And does not recognize which of the higher-level devices A and B corresponds to which setting.

Therefore, in the environment of a computer system in which a plurality of higher-level devices A and B are connected to one file control device 50, if the setting of the file transfer environment is canceled from one higher-level device, for example, the higher-level device A, When the file transfer environment set by the other higher-level device B is released and the remote device transfer is performed from the higher-level device B that has not released the setting of the file transfer environment, the file transfer environment disappears. Therefore, execution of remote file transfer becomes impossible. When the setting is released from one higher-level device in this way, the setting of the other higher-level device may be released, thereby adversely affecting the other higher-level device.

[0012] Therefore, an object of the present invention is to provide a communication system in which a plurality of higher-level devices have established a communication path and a volume correspondence relationship. An object of the present invention is to provide means for setting / releasing remote settings in a file control device so as not to adversely affect a file transfer environment.

[0013]

Means for Solving the Problems In order to achieve the above object, when setting a communication path and setting a volume correspondence from a host device, the file control device has previously set each setting to which file device. Since there is no management information to store whether the setting has been made, in the present invention, management information for storing the setting of the communication path and the setting of the volume correspondence relationship from which higher-level device is set for each setting is newly created. To do.

As shown in FIG. 1, a task / resource management module 2, channel interface modules 3-0 and 3-1 and a transmission line interface are provided in a file control device 1 of a main center having upper devices A and B. Modules 4-0 and 4-1 and device interface modules 5-0 and 5-1 are provided.

Communication path management information holding units TM-0 and TM- which hold communication path management information indicating which higher-level device has set a communication path by the transmission path interface modules 4-0 and 4-1. 1 is provided. Further, a volume management information holding unit VM-0, in which the storage devices 6-0 and 6-1 hold volume management information indicating which volume the data is written in accordance with the instruction of which higher-level device,
VM-1 is provided.

Therefore, when the setting of the file transfer operation environment is released from a certain higher-level device, for example, the higher-level device A, the communication path management information and the volume management information are combined with the higher-level device that has issued the setting release. It becomes possible to recognize the transmission path interface module and the storage device, and it is possible to correctly release only the communication path and volume correspondence set by the higher-level device that has issued the release of the file transfer operation environment, It is possible to prevent the setting of the file transfer operation environment set in the same file control device 1 from the other higher-level device B from being released.

When the setting of the file transfer operation environment is released from a certain higher-level device, for example, the higher-level device A, if the release of all settings is specified, the remote transfer operation environment set by the other higher-level device B is set. By canceling the setting of all the communication paths and the setting of the volume correspondence in the file control device, it is possible to reduce the load on other host devices.

[0018] In other words, the above objects are as follows:
This is achieved by the configuration of (3). (1) In a remote file control device having a plurality of higher-level devices, a storage device, and a transmission path forming unit connected to the higher-level device and the storage device and forming a communication path with the other center, which remote device has been set A communication path management information holding unit for holding a communication path and a volume management information holding unit for holding a higher volume device that sets a volume correspondence are provided.

(2) In the remote file control device of (1), when executing the individual release command of the file transfer environment issued from a certain higher-level device, it recognizes from which higher-level device the individual release command is issued. The communication path management information holding means and the volume management information holding means cancel the setting of the communication path and the setting of the volume correspondence set by the same high-level device as the high-level device which issued the individual release command. And

(3) In the remote file control device of the above (1), the remote file control device includes a release command identification means for identifying whether a release command issued from a higher-level device is an individual release command or an all settings release command. When executing the all setting release command instructing the release of all the settings of the file transfer environment issued from the host device,
All communication path settings and volume correspondences in the remote file control device, including the communication path settings and volume correspondence settings that were set from other higher-level devices that are not the higher-level device that issued this all setting release command. Is canceled.

As a result, the following effects can be obtained. (1) Since there is provided communication path management information holding means for indicating from which higher-level device the communication path has been set, and volume management information holding means for indicating which higher-level apparatus has a volume correspondence relationship. When a plurality of higher-level devices are connected to one file control device and a plurality of remote transfer environments are set in the file control device,
It is easy to determine which host device sets each of the plurality of remote transfer environments.

(2) When executing the individual release command of the file transfer environment, the file transfer environment set by the same higher-level device as the higher-level device that issued the release command can be released accurately, so that any higher-level device can be released. Even if the setting of the remote transfer environment is released from the device, the release can be executed without affecting the remote transfer environment set by the other host device.

(3) Further, when the setting of the remote transfer environment is canceled from a certain higher-level device to the file control device, the setting is canceled by another higher-level device by designating cancellation of all settings. The setting of the remote transfer environment in the same file control device can be arbitrarily released.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a diagram illustrating a remote file transfer system using the present invention, and FIG. 4 is a diagram illustrating a state of setting and releasing a communication path according to the present invention.

In FIG. 2, the same symbols as those in the other figures indicate the same parts, 1 is a file control device, 2 is a task / resource management module, 3-0 and 3-1 are channel interface modules, 4-0, respectively. 4-1 are transmission line interface modules, 5-0 and 5-1 are device interface modules, 6-0 and 6-1 are storage devices, and the TM table 2-1 is a communication path management information holding unit. , VM table 2-2 is a volume management information holding unit.

The file control device 1 holds the data processed by the upper devices A and B of the main center in the storage device 6-0 or the storage device 6-1 based on the instruction from the upper devices A and B, and also processes the data. The data is transmitted to the sub-center shown in FIG. 3 via the transmission line, and includes the task / resource management module 2, the channel interface modules 3-0 and 3-1, the transmission line interface module 4-0, 4-1 and device interface modules 5-0 and 5-1.

The task / resource management module 2 performs work allocation control, data transfer control, data storage control, and the like. The transmission line interface modules 4-0 and 4-1 are connected to the host device A, B, a TM table 2-1 in which communication path management information indicating which transmission path interface module of the sub-center is in a connected state according to an instruction from any one of B, and storage devices 6-0, 6-1
And a VM table 2-2 in which the volume of the sub-center corresponding to the volume configuring the volume and the volume management information indicating the higher-level device that instructed the setting of the correspondence, and a setting release command from the higher-level device are output. When the setting is cancelled, there is provided a canceling command identifying means 2-3 for identifying whether the setting canceling command is an individual canceling command described later or an all setting canceling command.

Channel interface module 3
−0 is connected to the host device A, and the channel interface module 3-1 is connected to the host device B.
Further, the device interface module 5-0 is connected to the storage device 6-0, and the device interface module 5-0
The module 5-1 is connected to the storage device 6-1. The transmission path interface module 4-0 is connected to the transmission path interface module of the file control device 11 of the sub-center via the router 7-0 in accordance with an instruction from the host device A or B.
The modules 14-0, 14-1... And transmission paths are selectively configured. Similarly, the transmission line interface
The module 4-1 includes the file control device 11 of the sub center.
Transmission line interface modules 14-0, 14-
.. And the transmission path are selectively configured.

Device interface module 5
-0, data is stored in a predetermined position of the storage device 6-0 in accordance with an instruction from the host device A or B. Similarly, the device interface module 5-1 includes:
The data is stored in a predetermined position of the storage device 6-1.

The storage device 6-0 stores data processed by the host device A or B. The storage device 6-0 is composed of, for example, a magnetic disk device and has a volume (volume number V).
M ₀ -DVS ₀ , VM ₀ -DVS 1...). Similarly, the storage device 6-1 has the same configuration and is managed by volume numbers VM ₁ -DVS 0, VM ₁ -DVS ₁ . This volume number is a serial number.

As shown in FIG. 3, the sub-center is also constructed in the same manner as the main center.
1, a TM table 12-1, a VM table 12-2, a task / resource management module 12 provided with a release instruction identifying means (not shown), a channel interface module 13-0 (CA ₀ '), 13-1 ( CA ₁ '), the transmission line interface module 14-0 (R
_{A 0 '), 14-1 (RA} 1'), ··· 14-M (R
A _M '), device interface module 15
−0 (DA ₀ ′), 15-1 (DA ₁ ′), storage device 1
6-0, 16-1 etc., and routers 17-0, 17-
The transmission line interface modules 14-0 to 14-M can be selectively connected to the transmission line interface modules 4-0 to 4-M of the main center by 1... 17-M. .

Hereinafter, the operation of the present invention will be described for A, communication path setting, B, volume correspondence setting, C, individual release of the file transfer operation environment, D, and all settings of the file transfer operation environment. I do.

A. When a communication path is set from the host device A,
(1) The host device A of the main center sends the file control device 1
Communication path (for example, RA ₀-RA₀′)
Issue.

(2) This setting command is received by the channel interface module 3-0, and
The resource management module 2 is notified that this communication path setting command has been issued.

(3) The task / resource management module 2 of the main center sends the designated parameter, that is, RA ₀ -R
That the connection of the A ₀ ', and decodes the parameters, corresponding RA ₀ clogging transmission line interface module 4-0
And if this is unused, the transmission line interface module 4-0
Module 4-0 and transmission line interface of sub-center
Setting the communication path with the module 14-0 is performed by the transmission line interface module 14 of the sub center.
Ask −0 to notify.

(4) With this, the transmission line interface module 4-0 of the main center operates the routers 7-0, 17-
0 to the transmission line interface module 14-0 of the sub-center. When this connection is made, the transmission line interface module 4-
0 reports to the task / resource management module 2 that the setting of the communication path with this sub-center has been completed normally.

(5) The task / resource management module 2 of the main center sends the report to the TM table 2-1 as follows.
As shown in the upper section of FIG. 2B, as the communication path management information, the transmission path interface RA ₀ of the main center is set to the communication path with the transmission path interface RA ₀ ′ of the sub center by the setting command from the higher-level device A. Write down the settings. Thereby, the task / resource management module 2 notifies the channel interface module 3-0 that the setting of the communication path has been completed normally. Then, the channel interface module 3-0 reports to the upper-level device A that the setting of the communication path has been completed normally. In the file control device 11 of the sub-center, the task / resource management module 12 writes in the TM table 12-1 that the same communication path management information has been set.

FIG. 4 shows the transmission line interface module 4-0 of the file control device 1 of the main center and the transmission line interface module 14 of the file control device 11 of the sub center in response to a command from the host device A of the main center. −0, a communication path is set, and the communication path management information indicating this is set in the TM table 2 of the file control device 1.
-1 and TM table 12-1 of file control device 11
Indicates that they have been entered. At the same time, in response to a command from the host device B of the main center, the transmission line interface module 4-1 of the file control unit 1 of the main center and the transmission line interface module 14-1 of the file control unit 11 of the sub center are transmitted. A communication path is set, and communication path management information indicating this is stored in the TM table 2-1 of the file control device 1 and the file control device 11.
In the TM table 12-1.

B: Setting of volume correspondence from host device A
(1) After setting the communication path as described above,
The upper device A of the center is in
(For example, VM₀−DVS0, VM ₀'-D
VS7) is issued.

(2) This setting command is received by the channel interface module 3-0, and
The resource management module 2 is notified that the volume correspondence setting command has been issued.

(3) The task / resource management module 2 of the main center has designated parameters, that is, VM ₀ -DVS
0, the parameter of the volume correspondence of VM ₀ '-DVS 7 is decoded, and the status of the volume VM ₀ -DVS ₀ is accessed by accessing a device status management table (not shown) to determine whether the volume is usable. Perform a check. If it is not usable, this is notified to the higher-level device A via the channel interface module 3-0. However, if it can be used, the task / resource management module 2 executes the TM table 2-
1 to find the transmission line interface module 4-0 for which the communication path has been set in A.
The task / resource management module 2 sets a volume correspondence between the main center volume number VM ₀ -DVS ₀ and the sub center volume number VM ₀ ′ -DVS 7 for the transmission path interface module 4-0. Ask the sub-center to notify you of this.

(4) Accordingly, the transmission line interface module 4-0 of the main center changes the volume number VM ₀ -DVS0 of the main center and the volume number VM ₀ '-DVS 7 of the sub center according to an instruction from the host device A. The correspondence is notified to the transmission line interface module 14-0 of the sub-center via the transmission line.

(5) The transmission line interface module 14-0 of the sub-center receiving the notification notifies the file control device 11 of the setting of the volume correspondence. (6) The file control device 11 accesses a device status management table (not shown) to check whether or not the volume of the volume number VM ₀ '-DVS7 of the sub-center is usable. If it is not in a usable state, this is notified to the transmission line interface module 14-0 of the sub center, the transmission line interface module 4-0 of the main center, the task / resource management module 2, the channel interface module 3
The setting is notified to the upper-level device A via −0, and the setting ends abnormally. However, if the volume of the sub-center is usable, the task / resource management module 12 of the sub-center notifies the transmission path interface module 14-0 of the sub-center of the end of the setting of the volume correspondence. At the same time, in the task / resource management module 12, the VM table 12-
2 shows the setting of the volume correspondence relation and this is the host apparatus A
Indicate that it is based on instructions from.

(7) Transmission line interface of sub center
In the module 14-0, the completion of the setting of the volume correspondence is notified by the transmission line interface module 4- in the main center.
Notify 0. As a result, the transmission line interface module 4-0 of the main center notifies the task / resource management module 2 that the setting of the volume correspondence relation in the sub center has been completed normally.

(8) The task / resource management module 2
The setting of the volume correspondence relation is set in the VM table 2-2,
The data as shown in the upper column of FIG. Then, it notifies the channel interface module 3-0 that the setting of the volume correspondence has been completed normally,
The channel interface module 3-0 reports to the host device A that the setting of the volume correspondence has been completed normally.

FIG. 5 shows a volume number DVS0 connected to the file control device 1 of the main center and a volume number connected to the file control device 11 of the sub center in response to a command from the host device A of the main center. DVS
The volume of O 'is in correspondence with the volume of volume number DVS1 and the volume of volume number DVS1' is in correspondence with the volume of volume DVS1 'in response to a command from the host device B of the main center.
This indicates that the information, that is, the volume management information is described in the VM table 2-2 of the main center and the VM table 12-2 of the sub center.

C. Individual Release of File Transfer Operating Environment (1) The host device A issues an individual release command of the file transfer operating environment to the file control device 1. This individual release command includes a parameter, that is, a communication path (for example, R
A ₀ -RA ₀ ′) and the volume correspondence (VM ₀ -DV
S0, VM ₀ '-DVS 7).

(2) The individual release command is received by the channel interface module 3-0 together with the parameter, and notifies the task / resource management module 2 that the release command of the file transfer operation environment has been issued. .

(3) Accordingly, the task / resource management module 2 of the main center recognizes that the release command identifying means 2-3 decodes the command and recognizes that it is an individual release command, and, based on the designated parameters, the TM table. 2-1 is accessed to obtain the transmission line interface module 4-0 of the main center forming the communication path, and when this is detected, the sub center is informed that the file transfer operation environment of the parameter is to be released. Request the transmission center interface module 4-0 of the main center to notify.

(4) Transmission of the main center based on this request
By notification from the route interface module 4-0
Sub-Center Transmission Line Interface Module 14-0
Notifies the task / resource management module 12 of the
The disk / resource management module 12 decodes this and
Individual release command of file transfer operating environment based on parameters
Recognizes that the command has been issued from the host device A, and
No response by host device A by accessing Table 2-2
Volume number VM₀−DVS0 and VM ₀'-D
The volume correspondence with VS7 is released, and
Formed by the host device A by accessing the
Transmission center interface module 14-
Release the communication path at 0. The solution of this communication route
Transmission center interface module prior to removal
The release state is notified to the rule 4-0.

(5) Upon receiving this notification, the transmission path interface module 4-0 of the main center notifies the task / resource management module 2 of the main center that the release of the file transfer operation environment in the sub center has been completed normally. Notify.

(6) Accordingly, the task / resource management module 2 accesses the TM table 2-1 and the VM table 2-2 to cancel the setting of the communication path in the main center and the setting of the volume correspondence. . That is, the communication path in the transmission line interface module 4-0 is released,
Also, the volume numbers VM ₀ -DVS ₀ and VM ₀ ′ -DVS
The volume correspondence with 7 is canceled.

At this time, the task / resource management module 2
Recognizes that the release of the file transfer operation environment has been issued from the higher-level device A, and when releasing the setting of the communication path and the setting of the volume correspondence, the higher-level device A Check if it was set from. Only when they are from the same higher-level device A, the communication path and the volume correspondence are set. If the setting to be released is from the host device B, it is not released.

(7) Then, the task / resource management module 2 notifies the channel interface module 3-0 that the individual release command of the file transfer operation environment has been normally completed. As a result, the channel interface module 3-0 reports to the host device A that the individual release command of the file transfer operation environment has been normally completed.

The thick dotted line in FIG. 4 shows an image of releasing the communication path, and the thick dotted line in FIG. 5 shows an image of releasing the volume correspondence. In the case of release, only those of the corresponding higher-level device are released.

D. Release of All Settings of File Transfer Operation Environment (1) The upper device A forms a communication path using the issuance of a command to release all settings of the file transfer operation environment to the file control device 1 as a parameter. Road interface
This is performed by instructing the module 4-0.

(2) This all setting release command is received by the channel interface module 3-0, and notifies the task / resource management module 2 that the all setting release command of the file transfer operation environment has been issued. I do.

(3) Accordingly, the task / resource management module 2 of the main center recognizes that the release instruction identifying means 2-3 decodes this to be the all setting release command, and forms a communication path. Transmission line interface of main center
A module 4-0 is obtained from the above parameters, and a request is made to the transmission line interface module 4-0 forming this communication path to notify the sub center that all settings of the file transfer operation environment are to be released. I do.

(4) In response to the notification from the transmission line interface module 4-0 of the main center based on this request, the transmission line interface module 14 of the sub center
−0 notifies this to the task / resource management module 12, and the task / resource management module 12 decodes this and recognizes that the command for canceling all settings of the file transfer operation environment has been issued from the higher-level device A, and Table 12-2
To cancel all volume correspondences, and
By accessing the table 12-1, all remote transfer operation environments in the file control device 11 including the release of all communication paths of the sub-center are released. Prior to this release, the release is notified to the transmission line interface module 4-0 of the main center.

(5) In response to this notification, the transmission center interface module 4-0 of the main center reports that the release of all the settings of the file transfer operation environment in the sub-center has been completed normally. Notify module 2.

(6) As a result, the task / resource management module 2 accesses the TM table 2-1 and the VM table 2-2 to cancel the setting of all communication paths and the setting of all volume correspondences in the main center. File control device 1
Releases all remote transfer operating environments within.

(7) Then, the task / resource management module 2 notifies the channel interface module 3-0 that the command for canceling all settings of the file transfer operation environment has been completed normally. As a result, the channel interface module 3-0 reports to the higher-level device A that issued this command that the command for canceling all settings of the file transfer operation environment has been completed normally.

The thick dotted line in FIG. 6 is an explanatory diagram of the release state in response to the all setting release command from the host device A. When the all-settings release command is issued from the higher-level device A, the settings for those set by the higher-level device B are also released.

[0064]

According to the present invention, the following effects can be obtained. (1) Since there is provided communication path management information holding means for indicating from which higher-level device the communication path has been set, and volume management information holding means for indicating which higher-level apparatus has a volume correspondence relationship. When a plurality of higher-level devices are connected to one file control device and a plurality of remote transfer environments are set in the file control device,
It is easy to determine which host device sets each of the plurality of remote transfer environments.

(2) When executing the individual release command of the file transfer environment, the file transfer environment set by the same higher-level device as the higher-level device that has issued the release command can be accurately released. Even if the setting of the remote transfer environment is released from the device, the release can be executed without affecting the remote transfer environment set by the other host device.

(3) Further, when the setting of the remote transfer environment is released from a certain higher-level device to the file control device, the release of all the settings is designated, so that the setting is performed by another higher-level device. The setting of the remote transfer environment in the same file control device can be arbitrarily released.

[Brief description of the drawings]

FIG. 1 shows a principle diagram of the present invention.

FIG. 2 shows an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a remote file transfer system using the present invention.

FIG. 4 is a diagram illustrating a state of setting and canceling a communication path according to the present invention.

FIG. 5 is a diagram illustrating a state of setting and canceling a volume correspondence relation in the present invention.

FIG. 6 is an explanatory diagram of cancellation of all settings in the present invention.

FIG. 7 is an explanatory diagram of a conventional remote file transfer system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 File control device 2 Task / resource management module 2-1 TM table 2-2 VM table 2-3 Release command identification means 3-0, 3-1 Channel interface module 4-0, 4-1 Transmission path interface Module 5-0, 5-1 Device interface module

 ──────────────────────────────────────────────────続 き Continued from the front page F term (reference) 5B014 EA05 EB04 GD04 GD05 GD17 GD21 GD31 HA02 HA05 HA10 5B089 AA01 AC01 AD02 AD06 AF06

Claims (3)

[Claims] 1. A remote file control device having a plurality of host devices, a storage device, and a transmission path forming means connected to the host device and the storage device and forming a communication path with the other center. Remote file control characterized by comprising communication path management information holding means for holding a communication path that has been set, and volume management information holding means for holding a volume correspondence set from which higher-level device. apparatus. 2. When executing an individual release command of a file transfer environment issued from a certain higher-level device, recognizes from which higher-level device the individual release command is issued, and stores said communication path management information holding means and said volume management. 2. The remote file control device according to claim 1, wherein, based on the information holding unit, the setting of the communication path and the setting of the volume correspondence set by the same higher-level device that issued the individual release command are released. 3. The remote file control device according to claim 1, further comprising a release command identifying means for determining whether a release command issued from the host device is an individual release command or an all settings release command. When executing the all setting release command instructing the release of all settings,
All communication path settings and volume correspondences in the remote file control device, including the communication path settings and volume correspondence settings that were set from other higher-level devices that are not the higher-level device that issued this all setting release command. 2. The remote file control device according to claim 1, wherein the setting is canceled.