JPH01197863A - Local terminal simulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a local terminal simulator that relays communication between the virtual computer and the remote terminal and provides a local terminal interface to the virtual computer when the virtual computer is used from a remote terminal. , ``Aiming at a local terminal simulator that improves line usage efficiency for communication with a remote terminal, it relays communication between a virtual computer and a remote terminal, and has the virtual computer transmit the communication to the local terminal. means for interpreting input/output commands issued by the virtual machine to the local terminal and executing the required communication with the remote terminal, and storage means for retaining screen information received from the remote terminal. , and, when the input/output command is a sequence of commands for dividing and reading the screen information of the local terminal, the required information corresponding to each command in the command sequence is determined from the screen information held in the storage means. It is configured by means of dividing the parts and sequentially transferring them to the virtual machine. □ [Industrial Application Field] The present invention relays communication between the virtual machine and the remote terminal in a computer and provides a local terminal interface to the virtual machine when the virtual machine is used from a remote terminal. Regarding local terminal simulators.

[Conventional technology]

FIG. 2 is a block diagram showing an example of the configuration of a computer system.

One or more virtual machines (hereinafter referred to as VM) 3 are realized under the control of a VM management unit 2 executed by a processing device 1 .

As is well known, VM3 is a function that simulates a virtual computer system (that is, a virtual computer) with a required configuration different from an actual computer system (actual computer), and each VM
For each different individual operating system (
(hereinafter referred to as O8) can be constructed and operated under the control of the system.

The VM management unit 2 controls the simulation of each VM3,
A local terminal 6 and an external storage device are managed so that each VM is logically isolated so that they do not interfere with each other, and are actually connected to the processing device l via the channel device 4! 7. When each VM3 exchanges information with peripheral devices and communication devices such as the communication control device 5, communication line 9, and remote terminal 10, input/output commands issued from the O38 of the VM3 (for example, It has the function of relaying necessary information between the peripheral devices and communication devices and the VM0 by receiving and receiving the information (issued to the VM) and communicating with the channel device 4.

Further, the VM management unit 2 has a control function for inter-VM communication that mediates information exchange between different VMs.

With such functions of the VM management unit 2, - development of multiple different O8 or application programs within the computer system;
It is well known that maintenance tests can be performed in parallel.

In that case, the user can use the local terminal 6 assigned as an operator console to the required VMS.
Work progresses by exchanging information with 38.

In order to exchange information with the local terminal 6 assigned as the operator console of the VM 3, the O38 uses data writing input/output commands (hereinafter simply referred to as commands) to display information on the display screen of the display device of the local terminal 6. ), and issues data reading commands for reading information input from the keyboard and displayed on the display screen (screen information).

When the O38 executes an input/output command and issues a command to the operator console, the VM management unit 2 issues a command to the channel device 4, which causes the O38 to
A data input/output operation between the data area provided in the area of M3 and the local terminal 6 is started, and completion of the input/output operation is also notified to 038 via the VM management unit 2.

Here, data reading commands from the operator console include commands that read all information on the display screen (for example, the RB (Read [1uffer) command) and commands that read only the updated part on the display screen (for example, RM (Read Modified) command), etc., and one input/output operation generally consists of multiple commands chained together in a so-called data chain. For example, all the information on the display screen is divided into multiple commands. transfer to the area of

In order to enable the use of VMs as described above even from a remote location, the user can access the desired VM 3 from a remote terminal 10 connected via the channel device 4, communication control device 5, and communication line 9. A local terminal simulator 11 is provided which can access the OS 8 and exchange information through an interface with the operator console.

, in that case the local terminal simulator 11 is a separate VM
If the operator console of VM3 (i.e. local terminal 6) is defined in the VM management unit 2 to be operated under 0813 of 12, and the operator console of VM3 (i.e. local terminal 6) is simulated on VM12, the command string for the operator console issued by O88 will be as follows. , passed to the VM 12 by the y'M management unit 2,
It passes through 0813 to the local terminal simulator 11.

FIG. 3 is a block diagram showing an example of the configuration of the local terminal simulator 11. For example, in the case of a data reading command, the command analysis processing unit 15 receives and receives a command string. When each command in the command string is analyzed and notified to the transmission/reception conversion control unit 16, the transmission/reception conversion control unit 1
6 generates a command string for remote communication in accordance with the contents of the notified command, and sends the communication to the communication control unit 14.

The communication control unit 14 is a program having a normal data communication processing function, and requests the communication control device 5 to perform requested communication processing via the channel device 4.

As a result, when data is received from the remote terminal 10, the data is passed to the command analysis processing section 15 via the communication control section 14 and the transmission/reception conversion control section 16.

In the case of remote communication, the remote terminal 10 usually transmits all the information on the display screen at once, so the command analysis section 15
specifies the data of the part necessary for the command to be processed for the time being, sends a request to the VM management unit-2 to transfer it to the area specified by the command in the VMa, and then the VM management unit 2 transfers the data between VMs. The transfer ends the simulation of data transfer for one command in the command sequence issued by 038.

[Problem to be solved by the invention]

In this way, by sequentially executing the simulation of each command in the command sequence, information exchange with a remote terminal is possible.
It is simulated by an ink interface with a local terminal for OS8.

However, according to the above processing method, in the lower row of data-chained commands, for each command simulation,
Data transmission of full screen information from the remote terminal 10 is performed,
There is a problem that communication lines are inappropriately occupied.

An object of the present invention is to provide a local terminal simulator that improves line usage efficiency for communication with a remote terminal for using a VM from a remote terminal.

[Means to solve the problem]

FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of the local terminal simulator, where 21 is the local terminal simulator, 25 is a command analysis processing unit that analyzes the command sequence issued by O8 to the operator console of the local terminal, and 26 is the command of the command analysis processing unit 25. A transmission/reception conversion control section generates a command sequence for data transfer with a remote terminal based on the analysis result and requests the communication control section 14 to execute the command. 27 is a received data storage area for saving data received from the remote terminal. .

[For production]

Command analysis processing unit 2 of local terminal simulator 21
5 receives the data reading command sequence issued by O8 running on the VM, analyzes the command, and notifies the transmission/reception conversion control unit 26.

The transmission/reception conversion control unit 26 generates a required remote communication command sequence, requests the communication control unit 14 to execute communication, and receives data received from the remote terminal as a result.

The command analysis processing unit 2 stores it in the communication data storage area 27.
Notify 5.

If the command sequence is data chained, the command analysis processing unit 25 extracts the data corresponding to each command from the received data storage area 27 without notifying the transmission/reception conversion control unit 26 of the analysis results of subsequent commands. is sequentially divided and transferred to the VM area specified by the command, and the simulation of the command sequence ends.

With the above processing method, data is transmitted from the remote terminal only once for a data reading command sequence, so the usage rate of the communication line can be reduced.

〔Example〕

When the VM 3 shown in FIG. 2 is used from a remote terminal 10, according to the present invention, the local terminal simulator 11 of the VM 12 is replaced with the local terminal simulator 21 having the configuration shown in FIG. In other words, simulating the local terminal on the VM 12 is defined in the VM management unit 2 as in the past.

Therefore, when the O88 issues a command sequence to the operator console, this command sequence is passed to the VM 12 by the VM management unit 2, and then to the local terminal simulator 21 via 0813.

In the local terminal simulator 21 of FIG. 1, when the command analysis processing unit 25 receives a data reading command sequence, it analyzes the commands in the command sequence as in the conventional manner and notifies the transmission/reception conversion control unit 26. The transmission/reception conversion control section 26 generates a command string for remote communication in accordance with the contents of the notified command, and sends the communication to the communication control section 14 .

When data is received from the remote terminal 10, the communication control unit 1
4, the transmission/reception conversion control section 26 receives the data, stores it in the received data storage area 27, and notifies the command analysis processing section 25 of completion of reception.

If the command sequence is data chained, the command analysis processing unit 25 analyzes all of the remote terminal 10 stored in the received data storage area 27 without notifying the transmission/reception conversion control unit 26 of the analysis results of subsequent commands. The screen information is divided into data parts corresponding to each command, and a request is sent to the VM management unit 2 to transfer the first part to the area of the VM 3 specified by the corresponding command. When this is completed, the received data storage area 27
Specifying the next part above, requests the VM management unit 2 to transfer data, and simulates data transfer for the next command.

In this way, the data in the received data storage area 27 is sequentially transferred to the designated VM area, and the simulation of the command sequence is completed.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when a virtual machine is used from a remote terminal, a local terminal simulator that provides a local terminal interface to the virtual machine executes command sequences for data reading. Since data transmission from the remote terminal is required only once, there is a significant industrial effect of improving the efficiency of communication line usage.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a block diagram of an example configuration of a computer system, and FIG. 3 is a block diagram showing a conventional configuration. In the figure, 1 is the processing unit, 2 is the VM management unit, and 3.12 is the V
M, 4 is a channel device, 5 is a communication control device,
6 is a local terminal, 8.13 is O3, 9 is a communication line, 10 is a remote terminal, 14 is a communication control unit, 11.2
1 is a local terminal simulator, 15.25 is a command analysis processing unit, and 16.26 is a transmission/reception conversion control unit. Fig. 1 is a block diagram showing the configuration of the present invention. Fig. 1 is a block diagram of an example of the configuration of a computer system. Fig. 112

Claims (1)

[Claims] When relaying communication between a virtual computer and a remote terminal and simulating the communication for the virtual computer as communication with a local terminal, the virtual computer means (25, 26) for interpreting input/output commands to be issued and performing necessary communications with the remote terminal; storage means (25, 26) for retaining screen information received from the remote terminal;
27), and when the input/output command is a string of commands for dividing and reading the screen information of the local terminal, each of the command strings is extracted from the screen information held in the storage means (27). A local terminal simulator characterized by comprising means (25) for dividing required parts corresponding to a command and sequentially transferring them to the virtual machine.