JP3308925B2 - State monitoring method, state monitoring system, and machine-readable recording medium recording program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for monitoring the status of devices connected to a network, and more particularly to a status monitoring technology for monitoring whether or not monitored devices are in the same status continuously for a predetermined time or more. About.

[0002]

2. Description of the Related Art Conventionally, the state of a device to be monitored such as a communication device connected to a network is monitored, and when the same state continues for a predetermined time or longer, the fact is notified to an administrator or the like. ing. Such a technique has been conventionally used, for example, when monitoring forgotten line disconnection of a communication device.

When monitoring whether a monitoring target device is in the same state continuously for a predetermined time or more, conventionally,
Generally, it is as follows. The status monitoring device inquires the monitoring target device about the current status at regular intervals. The monitoring target device notifies the status monitoring device of the current status of its own device each time an inquiry is made. If the current status reported from the monitored device is the same as the status reported at the time of the previous inquiry, the status monitoring device determines that the status of the monitored device has not changed, and Are increased by the inquiry interval, and if they are not the same, the same state duration is set to “0”. Thereafter, by comparing the same state continuation time with a predetermined time, it is determined whether or not the monitoring target device is in the same state continuously for a predetermined time or more.

[0004]

In the case of the above-mentioned prior art, an event that the state of the monitored device changes and returns to the original state can be detected before the next inquiry is made. To do so, it is necessary to shorten the query interval, but there is still a problem that it cannot be detected completely. In other words, there is a problem that even if the monitored device is not in the same state continuously for a predetermined time or more, the same state may be erroneously determined to be continuous for a predetermined time or more. Further, when the inquiry interval is shortened, there is a problem that the load on the monitoring target device and the status monitoring device increases. According to the technology (for example, Japanese Patent Application Laid-Open No. 6-242995) that constantly notifies the status of the monitoring target device to the status monitoring device via a dedicated line,
Although erroneous determination is eliminated, a dedicated line must be provided, resulting in a problem of increased cost.

Accordingly, an object of the present invention is to provide a state monitoring technique which does not erroneously determine that the same state continues for a predetermined time or more when the monitored device is not in the same state for a predetermined time or more. The object is to make it possible to realize it with a low load.

[0006]

According to the state monitoring method of the present invention, in order to achieve the above object, when a state transition occurs in its own apparatus, the monitored object apparatus determines the time at which the state transition occurs and the time after the state transition. When state inquiry information is received from the state monitoring device, the latest state transition information being held is sent to the state monitoring device, and the state monitoring device transmits a predetermined state transition time shorter than the warning time. An inquiry is made to the monitored device at an inquiry interval to obtain the latest state transition information held by the monitored device, and based on the obtained latest state transition information and the current inquiry time, It is determined whether or not the monitoring target device is in a predetermined warning target state continuously for a predetermined warning time or longer.

As a system suitable for carrying out this method, the state monitoring system of the present invention comprises:
A state transition record storage unit, and a state transition detection unit that stores state transition information including a time at the time of the state transition and a state after the state transition in the state transition record storage unit when a state transition occurs in the own device. Response means for transmitting the latest state transition information stored in the state transition record storage unit to the state monitoring device in response to an inquiry from the state monitoring device, wherein the state monitoring device performs State transition inquiry means for making an inquiry to the monitored device at a short predetermined inquiry interval to obtain the latest state transition information of the monitored device; and the latest state transition information acquired by the state transition inquiry means. Whether or not the monitoring target device has been in a predetermined warning target state continuously for a predetermined warning time or more based on the current inquiry time and And a condition determining means for determining.

[0008] In this configuration, the state transition detecting means in the monitoring target device, every time a state transition occurs in its own device,
State transition information including the time when the state transition occurs and the state after the state transition is stored in the state transition record storage unit.

On the other hand, in the state monitoring apparatus, the state transition inquiry means obtains the latest state transition information by inquiring the monitored apparatus of the latest state transition information at a predetermined inquiry interval, and determines the condition. The means determines, based on the latest state transition information acquired by the state transition inquiry means and the current inquiry time, whether or not the monitoring target device has been in the warning target state continuously for the warning time or longer.

Further, the state monitoring method of the present invention determines whether or not the monitoring target device is in the warning target state continuously for the warning time or more by also considering whether or not the monitoring target device has been reset. In order to eliminate an erroneous determination result that may occur when the reset of the monitored device is ignored, the monitored device determines the time when the status transition occurs when the status transition occurs in the device itself. Holds state transition information including the state after the state transition, if the reset is performed in the own device, measures the operating time since the reset was performed, if there is an inquiry from the state monitoring device, The latest state transition information being held and measured and the operation time are sent to the state monitoring device, and the state monitoring device inquires the monitored device at a predetermined inquiry interval shorter than the warning time. To obtain the latest state transition information and operating time held and measured by the monitoring target device, and perform a previous inquiry based on the operating time obtained at the time of this inquiry and the operating time obtained at the time of the previous inquiry. It is determined whether or not a reset has been performed in the monitoring target device after the time.If the reset has not been performed, the latest state transition information acquired at the time of this inquiry and the current inquiry time are used. It is determined whether or not the monitored device is in a predetermined warning target state continuously for a predetermined warning time or more based on,
If the reset has been performed, a predetermined warning is issued to the monitored device based on the reset occurrence time at which the reset was performed, the state taken by the monitored device immediately after the reset, and the current inquiry time. It is determined whether or not a predetermined warning target state has been continuously present for a time or more.

[0011] As a system suitable for carrying out this method, the condition monitoring system of the present invention comprises:
A state transition record storage unit, and a state transition detection unit that stores state transition information including a time at the time of the state transition and a state after the state transition in the state transition record storage unit when a state transition occurs in the own device. An operating time measuring means for measuring an operating time since a reset has occurred in the own device, and a latest state stored in the state transition record storage unit in response to an inquiry from the state monitoring device. A response unit for transmitting the transition information and the operation time measured by the operation time measurement unit to the state monitoring device, wherein the state monitoring device transmits the operation time to the monitored device at a predetermined inquiry interval shorter than the warning time. Inquiry is performed to obtain the latest state transition information and operation time of the monitored device, and the operation time acquired at the time of this inquiry and the operation acquired at the time of the previous inquiry. Based on the time interval, an inquiry means for determining whether or not the monitoring target device has been reset since the last inquiry, and the inquiry means determines that the reset has not been performed. In this case, based on the latest state transition information obtained at the time of the current inquiry by the inquiry means and the current inquiry time, the monitoring target device is continuously determined for a predetermined warning time or more. It is determined whether or not the state is a warning target state.If it is determined that the reset has been performed, the reset occurrence time at which the reset was performed and the monitoring target device The monitoring target state is continuously determined for a predetermined warning time or longer based on the status and the current inquiry time. And a condition determining means for determining whether it be a.

In this configuration, the state transition detecting means in the monitored device, when a state transition occurs in its own device, transmits state transition information including the time when the state transition occurred and the state after the state transition. The operation time is stored in the state transition record storage unit, and the operation time measuring unit measures the operation time after the reset is performed in the own device.

On the other hand, in the state monitoring device, the inquiry means makes an inquiry to the monitored device at a predetermined inquiry interval to acquire the latest state transition information and operating time of the monitored device, Based on the operation time acquired at the time of this inquiry and the operation time acquired at the time of the previous inquiry, it is determined whether or not the monitoring target device has been reset since the time of the previous inquiry. If the inquiry means determines that the reset has not been performed, the condition determination means compares the latest state transition information acquired by the inquiry means at the time of the current inquiry with the current inquiry time. It is determined whether or not the monitoring target device is in a predetermined warning target state continuously for a predetermined warning time or longer based on the predetermined warning time, and when it is determined that the reset has been performed, Is determined in advance based on the reset occurrence time at which the reset was performed, the state taken by the monitoring target device immediately after the reset, and the current inquiry time, for a predetermined warning time or more for the monitoring target device. It is determined whether or not a warning target state is set.

[0014]

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

FIG. 1 is a block diagram of an embodiment of the present invention, which comprises a plurality of monitored devices 1-1 to 1-n, a status monitoring device 2, and a network 8 for interconnecting the devices. Have been. The network 8 is a network capable of one-to-n connection such as a LAN and a public line.

The monitored device 1-1 includes a state transition detecting unit 11, a state transition record storage unit 12, and a response unit 13. The other monitored devices have the same configuration.

The state transition detecting means 11 is a device to be monitored 1
When a state transition occurs at −1, a function of writing state transition information in which the time and the state after the transition are paired to the state transition record storage unit 12 is provided. When the state transition information is written in the state transition record storage unit 12, if the latest state transition information is stored in the state transition record storage unit 12, the state transition information written in the previous state transition may be used. May be overwritten, or may be added to the already written state transition information. Also,
In the case where a format in which data is written in addition to the already written status transition information is adopted, the status transition record storage unit 12
If the storage capacity is limited, the oldest state transition information may be deleted after a certain number of records have been recorded, or may be deleted after a certain time has elapsed since the recording. If the record is to be deleted after a certain period of time, the inquiry interval is set shorter than the record holding time. If the same state continues for more than the record retention time in the monitored devices 1-1 to 1-n, the latest state transition record is deleted because the retention time has elapsed, and the state transition record storage unit 12 has no record. At this time, even if the state transition inquiring means 31 makes an inquiry, only the acquired information can be used as the monitoring target device 1-1.
The current state of is unknown. However, the latest state storage unit 4
The current status is checked by referring to the record of No. 1. Even when the monitored devices 1-1 to 1-n are limited in storage capacity, it can be continuously monitored that the devices are in the same state.

The response means 13 sends the latest state transition information stored in the state transition record storage unit 12 to the state monitoring apparatus 2 in response to an inquiry from the state monitoring apparatus 2 applied via the network 8. Has a function.

The state monitoring device 2 includes a data processing device 3 including a computer, a storage device 4, an output device 5 such as a display device, a facsimile, a pager, an input device 6 such as a keyboard, and a recording medium 7. ing.

The storage device 4 includes a latest status storage unit 41 and a warning output status storage unit 42. The latest state storage unit 41 has an area for each of the monitored devices 1-1 to 1-n, and each area stores the latest state transition information of the corresponding monitored device. Warning output state storage unit 42
Also has an area for each of the monitored devices 1-1 to 1-n, and each area stores information indicating whether a warning such as a warning message for the corresponding monitored device is currently output. You.

The data processing device 3 includes state transition inquiry means 31 and condition determination means 32.

The state transition inquiring means 31 sends each monitored device 1-1 at every preset inquiry interval T.
1 to 1-n are sequentially processed, and the monitoring target device 1-i
(1 ≦ i ≦ n) The function of inquiring the latest state transition information and the state of the monitored device 1-i based on the latest state transition information sent from the monitored device 1-i in response to the inquiry. And a function for determining whether or not the status has changed since the previous inquiry, and when the status of the monitored device 1-i has changed, the latest status transition information obtained by the current inquiry is stored in the latest status storage unit. 41, a function for writing to the corresponding area, and a function for notifying the condition determining means 32 of the device ID of the monitored device 1-i when the state of the monitored device 1-i has not changed. The above-mentioned inquiry interval T is set, for example, by the administrator using the input device 6, and its value can be set arbitrarily.

The condition judging means 32, when notified of the device ID of the monitored device 1-i from the state transition inquiring device 31, ie, the status of the monitored device 1-i has not changed since the previous inquiry. In this case, the monitoring target device 1-i
Is a preset warning target state, and it is determined whether or not the time from when the state becomes the warning target state to the present time (at the time of this inquiry) is equal to or longer than a preset warning time Tk. It has a function and a function of outputting a warning to the monitoring target device 1-i to the output device 5 when the time is equal to or longer than the warning time Tk. Note that the above-mentioned warning target state and warning time Tk are set, for example, by the administrator using the input device 6, and their values can be arbitrary. However, the warning time Tk is the inquiry interval T
Longer, that is, Tk> T.

The recording medium 7 connected to the data processing device 3 is a disk, a semiconductor memory, or another recording medium, in which a program for causing the data processing device 3 to function as a state monitoring device is recorded. This program is read by the data processing device 3 and controls its operation to realize the state transition inquiry means 31 and the condition determination means 32 on the data processing device 3.

FIG. 2 is a flowchart showing a processing example of the data processing device 3, and the operation of this embodiment will be described below with reference to the drawings.

Each time the state transition detecting means 11 in the monitored device 1-i detects that its own device has transitioned,
The state transition information in which the time when the state transition occurs and the state after the transition are paired is written in the state transition record storage unit 12.

On the other hand, the state monitoring apparatus 2 performs the processing shown in the flowchart of FIG. 2 at every preset inquiry interval T.

In step A1, the state transition inquiry means 31 sends one of the monitored devices 1-1 to 1-n (for example, the monitored device 1- 1) via the network 8.
Inquire 1) for the latest state transition information.

The response means 13 in the monitored device 1-1 is
When an inquiry from the state monitoring device 2 is received, the latest state transition information is extracted from the state transition record storage unit 12 and sent to the state monitoring device 2 via the network 8.

The state transition inquiry means 31 receives the latest state transition information from the monitored device 1-1,
By comparing the time of occurrence of the state transition contained therein with the time of the previous inquiry, it is determined whether or not a state transition has occurred in the monitored device 1-1 since the previous inquiry (step A2).

If there is a state transition (YES in step A2), the latest state information is written to the area of the latest state storage unit 41 allocated to the monitored device 1-1 (step A3). Thereafter, the state transition inquiry unit 31 refers to the area allocated to the monitoring target device 1-1 in the warning output status storage unit 42, and outputs a warning for the monitoring target device 1-1 to the output device 6 at present. It is checked whether it is present (step A4). In the initial state, information indicating “not output warning” is stored in each area of the warning output state storage unit 42.

When the warning is being output, that is, when the information indicating "Warning is being output" is stored in the corresponding area of the warning output state storage unit 42 (step A4 is YE).
S) indicates that at this point, a state transition has occurred in the monitored device 1-1, and continuous identical states have been released.
A warning release message or the like to release the warning for the monitored device 1-1 is output to the output device 5, and the contents of the area of the warning output status storage unit 42 assigned to the monitored device 1-1 are displayed as "warning""Notoutput" (step A
5, A6), and then the process of step A7 is performed. On the other hand, if it is not "Warning is being output" (NO in step A4), the process in step A7 is immediately performed.

The monitoring target device 1 after the last inquiry
When the state of -1 has transitioned, the above-described processing is performed. When the state has not transitioned (NO in step A2), the following processing is performed.

If the decision result in the step A2 is NO,
The state transition inquiry means 31 controls the condition
2, the monitoring target device 1 currently being processed
The device ID of -1 is notified (step A8).

The condition judging means 32 includes a monitoring target device 1-1.
When the device ID of the monitoring target device 1-1 is notified, the status transition information of the monitoring target device 1-1 stored in the latest status storage unit 41 is referred to, and the status of the monitoring target device 1-1 at the time of this inquiry is determined in advance. It is determined whether or not the state is a predetermined warning target state (step A9).

If the state of the monitored device 1-1 is not the warning target state (NO in step A9), the control is returned to the state transition inquiry means 31. On the other hand, if the status of the monitored device 1-1 is a warning target status (step A9 is YES), the time in the status transition information of the monitored device 1-1 and the time at the time of this inquiry (current time It is determined whether or not the difference from ()) is equal to or longer than a preset warning time Tk (step A10).

If it is determined that the time is equal to or longer than the warning time Tk (YES in step A10), the monitoring target device 1
-1 is output to the output device 5, and the information in the area assigned to the monitoring target device 1-1 in the warning output state storage unit 42 is changed to "Warning is being output" (step A11, A12), control is returned to the state transition inquiry unit 31. On the other hand, if it is determined that the time is not equal to or longer than the warning time Tk (step A10 is NO), the control is immediately returned to the state transition inquiry means 31.

The state transition inquiry means 31 performs the processing of step A7 when the control is returned from the condition determining means 32, when the determination result of step A4 is NO, and when the processing of step A6 is completed. In step A7,
It is determined whether an unprocessed monitoring target device exists. When it is determined that there is an unprocessed monitoring target device (YES in step A7), the process returns to step A1, and when it is determined that there is no unprocessed monitoring target device (step A7 is NO), The process ends.

Next, the operation of this embodiment will be described using a specific example. It is assumed that the monitoring target devices 1-1 to 1-n are communication devices that perform communication using a communication line of a pay-as-you-go system according to a connection time and need to pay attention to a long-time continuous connection. Further, the monitoring target devices 1-1 to 1-n transition between two states of a "connection state" and a "disconnection state", the "connection state" as a warning target state, and "2" as an inquiry interval T.
It is assumed that “0 minutes” and “30 minutes” are set in advance by the administrator as the warning time Tk.

When the contents of the state transition record storage unit 12 in the monitored device 1-1 are as shown in FIG. 3A, the state transition inquiry means 31
It is assumed that an inquiry is made to the monitoring target device 1-1 at 10:00 (Step A1).

The response means 13 in the monitored device 1-1 is
In response to this inquiry, the latest state transition information "19
98.10.1.9:26 connection ”to the state transition inquiry means 31.

The state transition inquiry means 31 outputs the time "1998.10.1. Time" in the latest state transition information from the previous inquiry time "1998.10.1.9:20".
9:26 "is newer, it is determined that a state transition has occurred in the monitored device 1-1 since the last inquiry, and the latest state transition information" 1998.10.10: 1.9: 2 "
6 connection ”is changed to the monitoring target device 1-1 in the latest state storage unit 41.
(Step A)
3).

Thereafter, the inquiry interval "20 minutes" elapses, and the next inquiry time "1998.10.1.10:
3B, if the contents of the state transition record storage unit 12 in the monitored device 1-1 have not changed, as shown in FIG. 3B, the determination results in steps A2 and A9 are NO and A9, respectively. Since the answer is YES, the duration of the connection state is calculated (step A10). In the case of this example, the duration is “1998.10.10: 00” − “199”.
8.10.1.9:26"=34 minutes, so that a warning is output and the contents of the warning output state storage unit 42 are changed to "Warning is being output".

Next, another embodiment of the present invention will be described. The main differences between this embodiment and the embodiment shown in FIG.
In the embodiment of FIG. 1, whether or not to output a warning based on only the latest state transition information stored in the state transition record storage unit without considering at all whether or not a reset has been performed in the monitored device. In contrast to this, in the present embodiment, whether or not to output a warning is controlled in consideration of whether or not the monitoring target device has been reset.
That is, in the embodiment of FIG. 1, the reset is performed between the latest state transition indicated by the state transition information stored in the state transition record storage unit and the current inquiry, and the same continuous state is temporarily set. Even if it is released, it controls whether a warning is issued based on the difference between the time at the time of the state transition indicated by the latest state transition information stored in the state transition information storage unit and the time at the time of this inquiry. Therefore, if the difference is equal to or longer than the warning time Tk and the state is the state to be warned, a warning is issued. Therefore, in the present embodiment, when a reset is performed in the monitoring target device, the processing is performed by regarding the pair of the reset time and the status taken by the monitoring target device immediately after the reset as the latest state transition information. By doing so, the above-mentioned problem is solved. Less than,
Another embodiment of the present invention will be described in detail.

FIG. 4 is a block diagram of another embodiment of the present invention, which comprises n monitoring target devices 1-1a to 1-1na, a status monitoring device 2a, and a network 8 such as a LAN. I have.

The monitored device 1-1a includes an operating time measuring unit 14 and an operating time storage unit 15 in addition to the configuration of the monitored device 1-1 shown in FIG. Is provided with a response means 13a. still,
Other monitoring target devices have the same configuration.

The operating time measuring means 14 is the monitoring target device 1
-1a has a function of measuring the time since the start of operation and storing the time in the operation time storage unit 15. That is, the operating time measuring unit 14 has a function of constantly measuring the time since the monitoring target device 1-1a is started or reset, and storing the measurement result in the operating time storage unit 15 as the operating time.

When the status monitoring device 2a inquires about the status transition information, the response means 13a sends the latest status transition information stored in the status transition recording storage unit 12 to the status monitoring device 2a, Is sent, the operating time stored in the operating time storage unit 15 is sent to the state monitoring device 2a.

The state monitoring device 2a has a data processing device 3a in place of the data processing device 3, a storage device 4a in place of the storage device 4, and a recording medium 7a in place of the recording medium 7. Is different from the state monitoring device 2 shown in FIG.

The storage device 4a is the same as the storage device 4 shown in FIG.
Is provided with a latest operating time storage unit 43 in addition to the configuration provided in the first embodiment.

The latest operating time storage unit 43 has an area for each of the monitored devices 1-1a to 1-na, and each area stores the operating time of the corresponding monitored device.

The data processing device 3a is different from the data processing device 3 shown in FIG. 1 in that a state transition inquiry means 31a is provided instead of the state transition inquiry means 31 and an operation time inquiry means 33 is added. Are different.

The operating time inquiring means 33 has a function of inquiring the monitored device 1-ia of the operating time instructed by the state transition inquiring means 31a, and is transmitted from the monitored device 1-ia in response to the inquiry. It has a function of notifying the operation time to the state transition inquiry means 31a.

The state transition inquiry means 31a has the following functions in addition to the functions provided in the state transition inquiry means 31 of FIG.

A function of acquiring the operating time of the monitored device 1-ia using the operating time inquiry means 33. Based on the state transition information sent from the monitored device 1-ia and the previous inquiry time, Monitored device 1
If it is determined that the state of −ia has not changed from the time of the previous inquiry, the operation time of the monitored device 1-ia acquired by using the operation time inquiry unit 33 and stored in the latest operation time storage unit 43. By comparing the operation time of the monitoring target device 1-ia with the monitoring target device 1-ia,
A function of determining whether or not a has been reset since the last inquiry. If the monitored device 1-ia has been reset since the last inquiry, the reset time is calculated, and the calculated reset time is calculated. A function of storing a pair of the status to be taken immediately after reset by the monitored device 1-ia in the latest status storage unit 41 as the latest status transition information of the monitored device 1-ia.

The recording medium 7a is a disk, a semiconductor memory, or another recording medium, in which a program for causing the data processing device 3a including a computer to function as the state monitoring device 2a is recorded. This program is read by the data processing device 3a, and by controlling the operation of the data processing device 3a,
a, the state transition inquiry means 31a and the condition determination means 3
2. The operation time inquiry means 33 is realized.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. Steps A1 to A1 in FIG.
The process of Step 2 is the same as the process of Steps A1 to A12 in FIG. 2, and thus the detailed description is omitted here.

The state transition inquiry means 31a in the state monitoring apparatus 2a inquires one monitored apparatus (for example, the monitored apparatus 1-1a) about the latest state transition information (FIG. 5, step A1). When the latest state transition information is sent from the response unit 13a in the monitored device 1-1a in response to this inquiry, the operating time of the monitored device 1-1a is inquired using the operating time inquiry unit 33 ( Step B1).

Upon receiving the inquiry about the operating time from the operating time inquiry means 33, the response means 13a sends the operating time stored in the operating time storage unit 15 to the operating time inquiry means 33.

When the operating time inquiring means 33 obtains the operating time, the state transition inquiring means 31a determines whether the operating time has passed since the last inquiring based on the latest state transition information obtained in step A1 and the time of the last inquiring. It is determined whether the state of the monitoring target device 1-1a has transitioned (step A2).

If it is determined in step A2 that the state has changed, the processing in steps A3 to A6 is performed, and then the operating time inquiry means 33 executes step B
The operating time acquired in step 1 is written in the area corresponding to the monitored device 1-1a in the latest operating time storage unit 43 (step B8). When the process in step B8 is completed, it is determined whether or not there is an unprocessed monitoring target device (step A7). If there is, the process returns to step A1, and if not, the process is terminated.

On the other hand, if it is determined in step A2 that the state of the monitored device 1-1a has not changed,
The state transition inquiry unit 31a is a monitoring target device 1-1 acquired by the operation time inquiry unit 33 in step B1.
By comparing the operation time of the monitoring target device 1-1a with the operation time of the monitoring target device 1-1a stored in the latest operation time storage unit 43 (the operation time obtained at the time of the previous inquiry), the monitoring target is monitored after the previous inquiry. It is determined whether the device 1-1a has been reset (step B2). That is, if the operation time acquired in step B1 is shorter, it is determined that the operation time has been reset. Otherwise, it is determined that the operation time has not been reset.

If it is determined in step B2 that the monitored device 1-1a has not been reset, the processing of steps A8 to A12, B8, and A7 is performed.

On the other hand, if it is determined in step B2 that the monitored device 1-1a has been reset, the state transition inquiry means 31a determines that a reset has occurred in the monitored device 1-1a. The calculated time is calculated (FIG. 6, step B3). This reset occurrence time is
It can be obtained by performing an operation of (current inquiry time−operating time). Next, the state transition inquiry unit 31a sets the reset occurrence time obtained in step B3 as the state transition time, and sets the state that the monitored device 1-1a takes immediately after the reset as the current state of the monitored device 1-1a. The transition information is stored in the latest state storage unit 41 as the latest state transition information of the monitored device 1-1a (step B4).

Thereafter, the state transition inquiry means 31a
Refers to the area assigned to the monitoring target device 1-1a in the warning output state storage unit 42, and determines whether or not the content is "during warning output" (step B5). If "warning is being output", a message or the like is output to the output device 5 to cancel the warning for the monitoring target device 1-1a. After changing to "output", the control is passed to the condition judging means 32 to perform the process of step A8 in FIG. On the other hand, if "warning has not been output", the control is immediately passed to the condition determining means 32, and the process of step A8 in FIG. 5 is performed. When the control is passed to the condition judging means 32, step A
The processing of 9 to A12 is performed, and thereafter, the control is returned to the state transition inquiry means 31a.

Next, the operation of this embodiment will be described with reference to specific examples.

Now, for example, as shown in FIG.
At 10:20 on October 1, 2008, the state transition inquiry unit 31a inquires the monitoring target device 1-1a about the latest state transition information (step A1), and further monitors using the operating time inquiry unit 33. It is assumed that the operation time of the target device 1-1a has been inquired (step B1). Also,
As shown in FIG. 7, the contents of the state transition record storage unit 12, the operation time storage unit 15, and the latest operation time storage unit 43 at this time are “connection at 9:26 on October 1, 1998”, It is assumed that "10 minutes" and "34 hours".
Also, the monitored devices 1-1a to 1-na transition between two states, a "connected state" and a "disconnected state", the "connected state" as a warning target state, and "20" as an inquiry interval T.
It is assumed that “minute” and “30 minutes” are set in advance by the administrator as the warning time Tk.

When the process of step B1 is completed, the status transition inquiry means 31a determines whether or not a status transition has occurred in the monitored device 1-1a since the last inquiry (FIG. 5, FIG. 5). Step A2). In the case of this example, the time in the latest state transition information “October 1, 1998 9:26 connection” acquired in step A1 is changed to the previous inquiry time “October 1, 1998 10
Since the time is before "00 minutes", it is determined that the state of the monitoring target device 1-1a has not changed since the last inquiry (step A2 is NO).

If the decision result in the step A2 is NO,
The state transition inquiry unit 31a determines whether or not the monitored device 1-1a has been reset since the previous inquiry (step B2). In this example, step B
Since the time “10 minutes” obtained in step 1 is shorter than the operation time “34 hours” stored in the latest operation time storage unit 43, it is determined that the time has been reset (step B2).
Is YES).

If the decision result in the step B2 is YES, the state transition inquiry means 31a calculates a reset occurrence time (FIG. 6, step B3). In this case,
Since the current inquiry time is “10:20 on October 1, 1998” and the operation time acquired from the monitored device 1-1a is “10 minutes”, the reset time = (1998
(October 1, 10: 20-10) = 1998 October
It will be 10:10 on the 1st of the month.

Thereafter, the state transition inquiry means 31a
Is the reset time "10:10 on October 1, 1998
The information that pairs the “minute” and the state “disconnected” that the monitored device 1-1a takes immediately after the reset is stored in the latest state storage unit 41 as the latest state transition information of the monitored device 1-1a (step B4). ).

Next, the state transition inquiry means 31a
If the information on the monitoring target device 1-1a stored in the warning output status storage unit 42 is “during warning output”, the output device 5 cancels the warning for the monitoring target device 1-1a. At the same time as outputting the message, the information on the monitoring target device 1-1a in the warning output state storage unit 42 is changed to “not output warning” (steps B6 and B7),
The device ID of the monitoring target device 1-1a is notified to the condition determining means 32 (FIG. 5, step A8).

As a result, the condition judging means 32 refers to the area allocated to the monitored device 1-1a in the latest state storage section 41, and warns the state indicated by the latest state transition information stored therein. It is determined whether the state is the target state (step A9). In the case of this example, the state indicated by the latest state transition information is “disconnected” as shown in FIG. 7, and the state to be warned is “connected”. 32 returns control to the state transition inquiry means 31a.

When the control is returned, the state transition inquiry means 31a uses the operation time "10 minutes" acquired by the operation time inquiry means 33 in step B1 as the latest operation time as information on the monitored device 1-1a. Storage unit 4
3 is stored.

As described above, in this embodiment, when it is detected that the reset has been performed in the monitored device 1-1a (FIG. 5, step B2 is YES), the reset time "1" is set.
A pair of "10:10 on Oct. 1, 998" and the state "disconnected" taken by the monitored device 1-1a immediately after the reset is used as the latest state transition information of the monitored device 1-1a as the latest state storage unit 41. (FIG. 6, step B4), and it is determined whether or not to issue a warning based on the information (steps A9 and A10).
At the time of this inquiry when only "0 minute" has elapsed, "199
At 10:20 on Oct. 1, 2008, a warning is not erroneously output. If the reset is not considered at all as in the embodiment shown in FIG. 1, it is determined that the latest state transition information is “connection at 9:26 on October 1, 1998” and the processing of steps A9 and A10 is performed. The monitoring target device 1-1a sets the warning time “30”.
A warning is erroneously output in spite of the fact that the status is not "connection" for more than "minutes" consecutively.

[0076]

The first effect is that when the monitoring target device is not in the state to be warned continuously for more than the warning time, it is not erroneously determined that the state to be warned is longer than the warning time. Is a point. The reason is that the latest state transition information (including the state transition occurrence time and the state after the state transition) held by the monitoring target device is inquired at a predetermined inquiry interval, and the state transition information acquired by this inquiry is This is because, based on the time at the time of this inquiry, it is determined whether or not the warning target state is continuous for the warning time or longer.

The second effect is that it is possible to judge whether or not the monitoring target device is continuously in the warning target state for more than the warning time without applying too much load to the monitoring target device and the status monitoring device. . The reason is that the interval between inquiries made by the state monitoring device can be made longer than in the conventional technique. In other words, the inquiry interval in the present invention may be shorter than the warning time, and it is necessary to detect an event such as a state transition before returning to the next inquiry and a return to the original state. This is because the inquiry interval can be made longer as compared with the technology.

The third effect is that even if the monitoring target device is reset and the state of the monitoring target device is not the warning target status continuously for the warning time or more, the warning target status is erroneously continued for the warning time or more. Is that it is not determined that The reason is that the determination is made in consideration of whether or not the monitoring target device has been reset.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a flowchart showing a processing example of a data processing device 3 of FIG. 1;

FIG. 3 is a diagram for explaining a specific example of the operation of the data processing device 3 of FIG. 1;

FIG. 4 is a block diagram of another embodiment of the present invention.

FIG. 5 is a flowchart showing a processing example of a data processing device 3a of FIG. 4;

FIG. 6 is a flowchart showing a processing example of a data processing device 3a of FIG. 4;

FIG. 7 is a diagram for explaining a specific example of the operation of the data processing device 3a in FIG. 4;

[Explanation of symbols]

 1-1 to 1-n, 1-1a to 1-na monitoring target device 11 state transition detecting unit 12 state transition recording storage unit 13, 13a response unit 14 operating time measuring unit 15 operating time storage unit 2, 2a State monitoring device 3, 3a Data processing device 31, 31a State transition inquiry means 32 Condition determination means 33 Operation time inquiry means 4, 4a Storage device 41 Latest state storage unit 42 Latest operation time Storage unit 43 Warning output state storage unit 5 Output device 6 Input device 7, 7a Recording medium 8 Network

Claims (8)

(57) [Claims] 1. When a state transition occurs in the monitoring target apparatus, the monitoring target apparatus retains state transition information including a time when the state transition occurs and a state after the state transition, and receives an inquiry from the state monitoring apparatus. In this case, the latest state transition information held is sent to the state monitoring device, and the state monitoring device makes an inquiry to the monitoring target device at a predetermined inquiry interval shorter than the warning time, and the monitoring target device The latest state transition information held is acquired, and based on the acquired latest state transition information and the current inquiry time, the monitoring target device is continuously determined for a predetermined warning time or longer. A state monitoring method for determining whether or not the state is a warning target state. 2. When a state transition occurs in the own apparatus, the monitored apparatus holds state transition information including a time at which the state transition occurred and a state after the state transition, and the monitored apparatus performs a reset. In the case of a reset, the operating time since the reset was performed is measured, and if there is an inquiry from the state monitoring device,
The latest state transition information being held and measured and the operation time are sent to the state monitoring device, and the state monitoring device makes an inquiry to the monitored device at a predetermined inquiry interval shorter than the warning time to perform the monitoring. The latest status transition information and operation time that the target device holds and measures are acquired, and based on the operation time acquired at the time of this inquiry and the operation time acquired at the time of the previous inquiry, It is determined whether or not the monitoring target device has been reset. If the reset has not been performed, the monitoring is performed based on the latest state transition information acquired at the time of this inquiry and the current inquiry time. It is determined whether or not the target device has been in the predetermined warning target state continuously for a predetermined warning time or longer, and the reset has been performed. In this case, based on the reset occurrence time at which the reset was performed, the state taken by the monitored device immediately after the reset, and the current inquiry time, the monitored device continuously continues for a predetermined warning time or more. A state monitoring method, comprising: determining whether or not a warning target state is set in advance. 3. When a state transition has occurred in the own apparatus, the apparatus retains state transition information including the time at which the state transition occurred and the state after the state transition, and retains the state transition information when inquired from the state monitoring apparatus. A monitoring target device that sends the latest status transition information to the status monitoring device, and an inquiry to the monitoring target device at a predetermined inquiry interval shorter than the warning time to update the latest monitoring status held by the monitoring target device. State transition information is acquired, and based on the acquired latest state transition information and the current inquiry time, the monitored device enters a predetermined warning target state continuously for a predetermined warning time or longer. A status monitoring system, comprising: a status monitoring device that determines whether or not the status is monitored. 4. The state monitoring apparatus according to claim 1, wherein the monitoring target device includes: a state transition record storage unit; and a state transition information including a state transition occurrence time and a state after the state transition when the state transition occurs in the own device. State transition detecting means for storing in a recording storage unit, and response means for transmitting the latest state transition information stored in the state transition recording storage unit to the state monitoring device in response to an inquiry from the state monitoring device. A status transition inquiry unit that obtains the latest status transition information of the monitored device by inquiring the monitored device at a predetermined inquiry interval shorter than the warning time, Based on the latest state transition information obtained by the state transition inquiry means and the current inquiry time, the monitored device is continuously determined for a predetermined warning time or longer. 4. The state monitoring system according to claim 3, further comprising condition determining means for determining whether or not a warning target state is set. 5. When a state transition occurs in the own device, state transition information including a time at which the state transition occurs and a state after the state transition is held, and when a reset is performed in the own device, a reset is performed. The status monitoring device that sends the latest status transition information that has been held and measured and the operating time to the status monitoring device, and a warning time. Inquiry is made to the monitored device at a predetermined inquiry interval shorter than that, to obtain the latest state transition information and operating time held and measured by the monitored device, and to obtain the operating time obtained at the time of this inquiry. It is determined whether or not the monitoring target device has been reset since the last inquiry based on the operating time acquired at the time of the previous inquiry and the resetting is performed. If not, based on the latest state transition information obtained at the time of this inquiry and the current inquiry time, the monitoring target device continuously enters a predetermined warning target state for a predetermined warning time or longer. It is determined whether the reset has been performed, and if the reset has been performed, the monitoring is performed based on the reset occurrence time at which the reset was performed, the state taken by the monitoring target device immediately after the reset, and the current inquiry time. A status monitoring system comprising: a status monitoring device that determines whether the target device is in a predetermined warning target state continuously for a predetermined warning time or longer. 6. The monitoring target device includes: a state transition record storage unit; and a state transition information including a state transition occurrence time and a state after the state transition when the state transition occurs in the own device. State transition detecting means to be stored in a recording storage unit; operating time measuring means for measuring an operating time after a reset has occurred in its own device; and said state transition in response to an inquiry from the state monitoring device. A response unit that sends the latest state transition information stored in the recording storage unit and the operation time measured by the operation time measurement unit to the state monitoring device, wherein the state monitoring device performs Also, at a short predetermined inquiry interval, an inquiry is made to the monitored device to obtain the latest state transition information and the operating time of the monitored device, and to obtain the information acquired at the time of the current inquiry. Inquiring means for determining whether or not the monitoring target device has been reset since the last inquiry based on the operating time and the operating time obtained at the time of the previous inquiry; and When it is determined that the reset has not been performed, the monitoring target device is determined in advance based on the latest state transition information obtained at the time of the current inquiry by the inquiry means and the current inquiry time. It is determined whether or not a predetermined warning target state has been continuously detected for a warning time or longer, and if it is determined that the reset has been performed, the reset occurrence time at which the reset was performed And a warning time period in which the monitored device is set in advance based on a state taken by the monitored device immediately after reset and a current inquiry time. 6. The state monitoring system according to claim 5, further comprising condition determination means for determining whether or not the state is a predetermined warning target state continuously. 7. A state transition record storage unit, and state transition information including a time when a state transition occurs and a state after the state transition when a state transition occurs in the own apparatus, is stored in the state transition record storage unit. A state of the monitored device, comprising: a state transition detection unit; and a response unit that sends the latest state transition information stored in the state transition record storage unit to the state monitoring device in response to an inquiry from the state monitoring device. State transition inquiry means for inquiring the monitored device at a predetermined inquiry interval shorter than the warning time to obtain the latest state transition information of the monitored device; Based on the latest state transition information acquired by the means and the current inquiry time, the monitoring target device is continuously determined for a predetermined warning time or more. Recorded machine-readable recording medium a program for functioning as a condition judgment means for judging whether or not it is warned state are. 8. A state transition record storage unit, and state transition information including a time when the state transition occurs and a state after the state transition when the state transition occurs in the own apparatus, is stored in the state transition record storage unit. State transition detection means, operation time measurement means for measuring the operation time since the reset occurred in the own device, and response to an inquiry from the state monitoring device, stored in the state transition record storage unit. A computer for monitoring the state of the monitored device, comprising a response unit for transmitting the latest state transition information and the operation time measured by the operation time measurement unit to the state monitoring device. Inquiry to the monitored device at the inquiry interval of to obtain the latest state transition information and the operating time of the monitored device, and the operation acquired at the time of this inquiry. Based on the time and the operating time obtained at the time of the previous inquiry, an inquiry means for determining whether or not the monitoring target device has been reset since the time of the previous inquiry. If it is determined that the monitoring target device has not been performed, the monitoring target device is determined based on the latest state transition information acquired at the time of the current inquiry by the inquiry means and the current inquiry time. It is determined whether or not it is in a predetermined warning target state continuously for a time or more, and when it is determined that the reset has been performed, a reset occurrence time at which the reset was performed, The monitoring target device is at least a predetermined warning time based on the state that the monitoring target device takes immediately after reset and the current inquiry time. Machine-readable recording medium recording a program for functioning as a condition judgment means for judging whether or not it is warned state in which predetermined in connection with.