JPH06223017A - Computer system - Google Patents

Abstract

PURPOSE:To restart a communication by a program which uses a resource on a computer in resuming operation in a system wherein one computer uses the resource on the computer by using a communication function. CONSTITUTION:The computer A uses the resource on the computer B by using the communication function. When the power source is turned OFF, a substitute response request means 21 requests a computer C to make a substitute response. A saving means 22 saves necessary data. A transmission stopping means 25 once receiving information on the substitute response from the substitute response request means 21 stops the transmission of data by the computer B. A substitute response communication means 26 makes a communication with the computer B as a substitute for the computer A. When the power source is turned ON, a recovering means 23 reloads the saved data. A substitute response resetting means 24 resets the substitute response for the computer C. A transmission restarting means 29 once receiving information on the resetting of the substitute response from the substitute response resetting means 24 stops the substitute response communication means 26 and restarts sending the data of the computer B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system in which computers having suspend / resume functions are network-connected.

[0002]

2. Description of the Related Art In recent years, computers have been increasingly used intermittently while moving, as portability has improved due to advances in size and weight reduction. In order to support such a usage pattern, the resume function is essential. This feature
When a power-off request is made, the information necessary for executing the OS and applications running on the computer is saved in a storage device, and when the power is turned on again, the information is restored to instantly reproduce the state immediately before the power-off request. Is. Therefore, the operation of starting and stopping the OS and the application is unnecessary, and the operability is very good.

[0003]

In computers, especially workstations, it has become commonplace today to communicate between computers connected to a network in the form of use. However, the current resume function saves / restores the data necessary for the continuous use of the computer used as a stand-alone computer, and does not guarantee the resumption of communication via the network after restoration. . During suspension, the confirmation response to the data transmission from the partner computer could not be returned, the connection was disconnected due to the timeout of retransmission, or during the suspension, a confirmation packet from the partner computer indicating whether the computer was down was sent. However, there was a problem that it could not respond to it, and when it was confirmed that the computer was down, the connection was cut off and communication could not be resumed after the power was turned on again.

In view of the above problems, it is an object of the present invention to solve the problem of disconnection of a connection during suspension and to restart communication after power is turned on again.

[0005]

In order to solve the above problems, the present invention provides a computer system in which computer A, computer B, and computer C are connected to a network, and computer A uses a communication function to perform computer processing. Using the resources on B, computer A uses the resources of computer B after turning on the power, and the first and second means that operate before turning off the power after the power is turned off. It has the 3rd and 4th means which operate | moves by the time of starting a process, The said 1st means is,
Proxy response request means for requesting a proxy response to the computer C when the power is turned off. The second means saves data necessary for continued execution of the computer A after requesting the proxy response. Of the saving means, the third means is a recovery means for recovering the data saved immediately before the power is turned off and necessary for continuous execution, and the fourth means is a proxy for canceling the proxy response to the computer C. Response canceling means, computer C
Is a transmission stop means for stopping the data transmission of the computer B when receiving the request for the proxy response from the computer A and the computer B.
A transmission resuming unit that has a proxy response communication unit that communicates with the computer A instead of the computer A, and that stops the proxy response communication unit when the notice of cancellation of the proxy response is received from the computer A and restarts the data transmission of the computer B. It is characterized by having.

According to another aspect of the invention, when the computer A is in a suspended state and the computer C cannot receive a notice of cancellation of the proxy response even after a lapse of a certain time after suspension, the computer B is restrained. The computer C is characterized by having a time monitoring means and a resource releasing means in order to release the existing resources.

[0007]

According to the invention described in claim 1, in the computer system in which the computer A can use the resources on the computer B by using the communication function, the computer A instructs the computer C when the power is turned off. , Ask for a proxy response, computer C
Causes the computer B to stop transmitting data, and the computer C responds to the confirmation packet from the computer B indicating whether the computer is down, instead of the computer A, and disconnects the suspended connection. By solving the above problem, it becomes possible to restart the communication after the power is turned on again.

According to the second aspect of the present invention, when the computer A is in the suspended state and there is no notification of cancellation of the proxy response even after a lapse of a certain time after the suspension, the computer C becomes the time monitoring means. It is possible to avoid the resource shortage by releasing the resource bound by the computer B by using the resource releasing means.

[0009]

EXAMPLES The present invention will be described below based on examples.

FIG. 1 is a block diagram of a computer system as an embodiment of the present invention. As shown in FIG. 1, there are computer A, computer B, and computer C as computer systems. Since it is assumed that the computer A communicates with the computer B using the communication function, the necessary configuration in that case is shown. The computer A is composed of a central processing unit 1, a main storage unit 2, a communication control unit 3 and a peripheral unit 4, and the computer B is also composed of a central processing unit 5, a main storage unit 6, a communication control unit 7 and a peripheral unit 8. The computer C also has the central processing unit 9, the main storage device 10, the communication control device 11, and the peripheral device 1.
It consists of two.

The main storage device 2 of the computer A is backed up by a battery, and can retain the stored contents even when the power is turned off, and the contents of the register of the central processing unit 1 and the communication are stored in a part of the storage area when the power is turned off. Information and OS in control device 3
It is possible to save the data required for continuous execution such as.

The communication control device 3 of the computer A is a device for controlling the communication between the computer A and the computer B and the communication between the computer A and the computer C. In the case of this embodiment, in particular, the request for the proxy response and the proxy response The cancellation notice is transmitted to the computer C.

The communication control device 7 of the computer B is a device for controlling the communication between the computer B and the computer A and the communication between the computer B and the computer C, and transmits a confirmation packet to the computer A as to whether the computer is down. .

The communication control device 11 of the computer C is the computer C
Is a device for controlling the communication between the computer A and the computer A, and the communication between the computer C and the computer B, and particularly in the case of the present embodiment, the transmission stop and transmission restart notifications are transmitted to the computer B.

FIG. 2 is a functional block diagram of a computer system as an embodiment of the present invention. In FIG. 2, the computer A has a proxy response requesting means 21 and a saving means 2
2, a recovery means 23, and a proxy response cancellation means 24,
The computer C uses the transmission stop means 25 and the proxy response communication means 2
6, a time monitoring unit 27, a resource releasing unit 28, and a transmission resuming unit 29.

The proxy response requesting means 21 operates after the power is turned off until the power is turned off, and when the power is turned off, the proxy response request means 21 requests the computer C for a proxy response. The save means 22 operates after the power is turned off and before the power is turned off, and saves the data necessary for the continuous execution of the computer A after the proxy response is requested. The recovery unit 23 operates after the power is turned on until the processing is started using the resources of the computer B, and recovers the data saved immediately before the power is turned off and necessary for continuous execution. The proxy response canceling unit 24 operates after the power is turned on until the processing is started using the resources of the computer B, and cancels the proxy response to the computer C.

The transmission stopping means 25 stops the transmission of the data of the computer B when receiving the notice of the request for the proxy response from the computer A. The proxy response communication unit 26 communicates with the computer B in place of the computer A. The time monitoring means 27 monitors the time from the notification of the request for the proxy response to the notification of the cancellation of the proxy response. The resource releasing means 28 releases the resources bound by the computer B. The transmission restart means 29 restarts the transmission of the data of the computer B upon receiving the notification of the cancellation of the proxy response from the computer A. Next, the operation on the computer A side will be described with reference to FIGS. In the configuration as shown in FIG. 1, the computer A uses the resources on the computer B by using the communication function. FIG. 3 shows an operation sequence when the power is turned off. First, when the power is turned off, it is determined whether or not there is a program using the communication function at that time (steps 31 and 32). . Which program
Whether it is communicating with another computer B is controlled by the OS part stored in the main storage device 2, so step 3
The determination of 1 is made by referring to the OS. Further, in this determination, the partner computer B communicating with the program is also identified, and the communication information of the computer A and the communication information of the identified computer of the communication partner are also obtained. If it is determined in step 32 that there is a program using the communication function, the process branches to step 33, and if not, the process branches to step 34. In step 33, a communication function in-use flag indicating whether or not the communication function is used is turned on, and the following processing is performed. Proxy response requesting means 2
1 is used to notify the computer C of the proxy response request (step 35). At this time, the communication information of the computer A and the communication information of the computer of the communication partner are also transmitted together. Then, when the proxy response is possible in the computer C, the notification of suspend OK is received from the computer C (step 36). After receiving the notification of Suspend OK, the data necessary for the continuous execution of the computer A is stored in the main storage device 2 by using the saving means 22.
(Step 37). After saving the necessary data, the power is turned off (step 38). Step 34
Then, the communication function busy flag is turned off, and the following processing is performed. The data necessary for the continuous execution of the computer A is saved in the main storage device 2 by using the saving means 22 (step 37). After saving the necessary data, the power is turned off (step 38). FIG. 4 shows an operation sequence when the computer A in the power-off state through the above operation is powered on. First, when the power is turned on (step 41), the communication function in-use flag is checked (step 42). In step 43, when the communication function in-use flag is on, the process branches to step 44, and when the communication function in-use flag is off, the process branches to step 46. Step 44
Then, the proxy response cancellation means 24 is used to notify the computer C of cancellation of the proxy response (step 44). Then, when the proxy response is canceled by computer C, computer A
The notification of resume OK is received from the computer C (step 45). After receiving the notification of the resume OK or when the communication function in-use flag is off, the recovery means 23 is used to recover the data saved in the main storage device 2 and necessary for continuous execution. (Step 46). Next, the program processing is restarted (step 47). Calculator C
By the proxy response communication means 26, the communication function with the computer B is restored without disconnection,
The communication program can also be restarted. Next, the operation of the computer C will be described with reference to FIG. FIG. 5 shows step 35.
3 shows an operation sequence of the computer C which receives the request for the proxy response and the notice of cancellation of the proxy response from the computer A in step 44. In the figure, step 501 is computer A
This is the step of judging the event from the above and branching conditionally. If the event from the computer A indicates the request of the proxy response, the processing branches to step 502, and if not, the processing branches to step 506. Therefore, when the request for the proxy response is notified from the computer A, the process proceeds to step 502, and the transmission of the data of the computer B is stopped by using the transmission stop means 25 (step 502). As a result, it is possible to prevent the connection from being disconnected due to the retransmission timeout in data retransmission. When the computer C performs the processing of the transmission stop means 25, next, in step 503, the proxy response communication means 26 is started.

Then, during the suspension, the proxy response communication means 26 of the computer C makes a proxy response. Proxy response communication means 26 performs the following processing. Computer B sends a confirmation packet to computer A, which confirms whether computer A is down, so computer C
However, instead of the suspended computer A, a confirmation packet addressed to computer A is taken out from computer B. This is based on the information of the computer A at the time of the notification of the request for the proxy response and the information of the computer of the communication partner. Next, the computer C responds to the transmission source computer B so that the suspended computer A is not down.

When the computer C starts the processing of the proxy response communication means 26, the suspend OK is transmitted to the computer A (step 504). Next, in step 505, the suspend time monitoring timer is started. In the figure, step 506 is a step of judging an event from the computer A and branching conditionally. If there is an event from the computer A before the suspension time monitoring timer times out using the time monitoring means 27 and an instruction to cancel the proxy response is given, the process proceeds to step 507. If there is no event from the computer A, the process proceeds to step 511. Branch to. Step 507
Cancels the suspend time monitoring timer. Next, the proxy response communication means 26 is stopped (step 508). next,
The transmission of the data of the computer B is restarted using the transmission restart means 29 (step 509). Then, the resume OK is transmitted to the computer A (step 510). on the other hand,
When the suspend time monitoring timer times out without the notification of the cancellation of the proxy response (step 511), the resource releasing means 28 is used to release the resource being used by the computer B (step 512). Here, release of resources means
Send a disconnection request, disconnect the connection,
Freeing resources such as buffers. Although the present description has been described based on the embodiment, it goes without saying that the present description is not limited to the above embodiment. Opponent computer B 1
Although it has been described as a device, it is possible to restart communication after the power is turned on again even when a plurality of devices are used.

[0020]

As described above, according to the present invention, the computer A
In a computer system capable of using the resources on the computer B by using the communication function, the computer A requests a substitute response from the computer C when the power is turned off.
The computer C stops the data transmission of the computer B, and further, the computer C responds to the confirmation packet from the computer B indicating whether the computer is down, instead of the computer A, and disconnects the suspended connection. By solving the above problem, it becomes possible to restart communication after the power is turned on again.

Further, according to the invention described in claim 2, when the computer A is in a suspended state and there is no notice of cancellation of the proxy response even after a lapse of a certain time after suspension, the computer C monitors the time. By using the means and the resource releasing means, it is possible to release the resource bound by the computer B and avoid running out of resources.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of a computer system according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of the embodiment.

FIG. 3 is a view showing an operation sequence when the computer A in the embodiment is turned off.

FIG. 4 is a diagram showing an operation sequence when the computer A in the embodiment is powered on.

FIG. 5 is a diagram showing an operation sequence of a computer C in the embodiment.

[Explanation of symbols]

 1, 5, 9 Central processing unit 2, 6, 10 Main storage device 3, 7, 11 Communication control device 4, 8, 12 Peripheral device 21 Proxy response request means 22 Evacuation means 23 Recovery means 24 Proxy response cancellation means 25 Transmission stop Means 26 Proxy response communication means 27 Time monitoring means 28 Resource releasing means 29 Transmission restarting means

Claims (2)

[Claims] 1. In a computer system in which computer A, computer B, and computer C are connected to a network, computer A uses resources on computer B by using a communication function, and computer A is powered off. After the operation, the first and second means operate until the power is turned off, and the third and fourth means operate after the power is turned on and the processing is started using the resources of the computer B. The first means is a proxy response requesting means for requesting a proxy response to the computer C when the power is turned off, and the second means is a computer A after requesting the proxy response. Is a saving means for saving the data necessary for continuous execution, the third means is a recovery means for recovering the data necessary for continuous execution saved immediately before the power is turned off, and the fourth means is Cancels the proxy response to computer C In the physical response canceling means, the computer C performs the communication between the computer B and the transmission stopping means for stopping the data transmission of the computer B when the computer A receives the notification of the request for the proxy response from the computer A. Have means,
A computer system having a transmission restart means for stopping the proxy response communication means and restarting the data transmission of the computer B upon receiving a notification of cancellation of the proxy response from the computer A. 2. When the computer A is in a suspended state and the computer C cannot receive the notice of cancellation of the proxy response even after a lapse of a certain period of time after the suspension, the resources bound by the computer B are released. The computer system according to claim 1, wherein the computer C has a time monitoring means and a resource releasing means.