JP3166834B2 - Duplicated circuit control method and duplicated circuit control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an information processing system. In particular, both the active system that operates mainly and the standby system that substitutes for the operation of the active system when any failure occurs in the active system, that is, the system that is duplicated as the active system and the standby system The present invention relates to system switching control.

[0002]

2. Description of the Related Art In the present specification, switching control of a circuit duplicated between an active system and a standby system is called a duplicated circuit control, and a device for controlling the duplicated circuit is called a duplicated circuit control device.

In the conventional redundant circuit control device, when a failure occurs in a component (port) of the active system, information on whether or not to switch from the active system to the standby system and a component number (port number) Are described in the configuration file. Whether or not to execute the switching is set in advance based on the importance of the effect of the failure of the port on the entire system. In accordance with this configuration file, switching is performed according to conditions according to the failure detection location, but even if a failure occurs in multiple ports, system switching will not be performed if switching is not required for those ports Become.

Further, in the conventional redundant circuit control device, system switching is performed even in a situation where there is no need to switch the system because the influence of the failure occurrence is low, such as during nighttime when the traffic volume is small. This is because dynamic parameters such as the current time and the traffic volume are not taken into consideration as a basis for system switching.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a redundant circuit control method and a redundant circuit control device which take into account the occurrence of a failure in a plurality of ports and dynamic parameters at the time of failure. It is.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an apparatus for operating an information processing apparatus duplexed to an active system and a standby system from an active system to a standby system. In the redundant circuit control method for switching operations, a step of setting a weight in proportion to the magnitude of the influence of the occurrence of a failure on each port constituting the active device, a step of detecting the occurrence of a failure in the port, A redundant circuit control method, comprising: a step of collectively evaluating faults in all detected ports in accordance with a weight setting; and a step of switching operation from an active device to a standby device according to the evaluation. Provided are a recording medium recording a duplicated circuit control program according to the method, and a duplicated circuit control device.

Further, the present invention provides a duplicated circuit control method characterized in that the weight setting changes with time, a recording medium storing a duplicated circuit control program by the duplicated circuit control method, and a duplicated circuit control device.

[0008]

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

Referring to FIG. 1, an active system 1 and a standby system 2 are connected to a redundant circuit controller 3.

The active system 1 determines whether or not to switch to the standby system 2 when a failure occurs. The switching is calculated based on the importance of the effect of the failure, and when the switching needs to be performed, a switching request signal is output to the redundant circuit control device 3.

When receiving the switching request signal, the redundant circuit control device 3 outputs a switching control signal to the active system 1 and the standby system 2 to switch between the active system 1 and the standby system 2.

When a failure occurs in the port 15, a failure signal is input to the data processing device 11. The data processing device 11 determines whether or not to perform switching based on the value of the dynamic parameter, the failure signal from the port 15, the weighting information from the storage device 12, and the dynamic parameter information. When it is determined that the switching is necessary because the influence is large, the switching request signal is output to the duplex switching control circuit 3.

The storage device 12 has a weight setting file description section 13 and a dynamic parameter setting file storage section 14. The weight setting file storage unit 13 describes weight information for the switching determination function. The dynamic parameter setting file storage unit 14 describes information for reflecting dynamic parameters such as time and traffic volume in the switching determination function. Each setting is performed from the command line interface 4 or the network management system 5.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS.

The data processing device 11 in the active system 1 shown in FIG. 1 calculates a switching determination function from failure information detected from a port, and determines whether to switch from the active system to the active system. Do. First, the data processing device 11
The switching determination function calculated in will be described. The switching determination function is formulated by the following equation (1).

[0016]

(Equation 1) Here, the weighting coefficient c _k for switching is formulated by the following equation (2).

[0017]

(Equation 2) This is an equation for dynamically changing the weighting coefficient _ck by dynamic parameters such as time and traffic. A setting threshold δ for switching is defined, and

[0018]

(Equation 3) , The data processing device 1 outputs a switching request signal to the duplex switching control circuit 3.

Next, details of the operation at the time of switching determination will be described.

The data processing device 1 detects the occurrence of a failure based on a failure signal from the port 15 (step A1).

When the occurrence of a failure is detected, a weight setting file existing in the weight setting file storage unit is referred to (step A2). As shown in FIG. 3, each port number, a weighting constant c _k for switching, and a pointer to a dynamic parameter setting file are described in the weight setting file. The setting of the c _k is, c _k ≧
When a constant value of 0 is written, it is treated as a constant that does not consider dynamic parameters.

When _ck = -1 is set, _ck is treated as including a dynamic parameter, and the dynamic parameter setting file is referred to from the dynamic parameter setting file description unit 14 through the pointer information (step A3). As shown in FIG. 4, each dynamic parameter value and its function value are described in the dynamic parameter setting file. FIG.
Description of dynamic parameter x ₁ wherein the "1,10" is
It shall mean 1 ≦ x ₁ ≦ 10. Weighting coefficient c for switching according to the dynamic parameter setting file
_k is calculated (step A3). The data processing device 1
The value of the switching determination function S is calculated based on the calculated value of the weighting coefficient and the failure information from the port 15 (step A4). The set threshold value δ is compared with the value of S, and when S ≧ δ, a switching request signal is output to the duplex switching control circuit 3 (step A5). Upon receiving the switching request signal, the duplex switching control circuit 3 outputs a switching control signal to the active system 1 and the standby system 2, and switching from the active system to the standby system is performed.

[0023]

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIGS. 1, 2 and 5. FIG.

Referring to FIG. 5, the weight setting file storage unit 12 describes values of ports 1 to 4 and weighting coefficients for the numbers. For the obstacles of numbers 1 to 3, the weighting coefficients are treated as constants. The fault number 4 is treated as including the dynamic parameter in the weighting coefficient, and the dynamic parameter setting file is referred to (step A2). Here, it is assumed that only the time is handled as the dynamic parameter of the number 4. a parameter x ₁ represents time, x ₁ = 0 represents the day, x ₁ = 1 denote the night. The value of x ₁ described in the dynamic parameter file and the function values based on, for calculating the value of the weighting coefficient (step A3). The switching determination function S is calculated using the calculated weighting coefficient value (step A4). The threshold value δ for switching determination is δ
If it is set as = 10, for example, (1) No. 1 has a fault S = 10 switching (2) No. 2 fault has occurred S = 5 No switching has occurred (3) Nos. 2 and 3 have faults S = 5 + 5 = 10 Switching (4) No. 4 causes a failure in the daytime S = 10 Switching (5) No. 4 causes a fault in the night S = 5 No switching is performed. In this example, since the failure of number 1 has a large effect, a switching request signal is output when a single failure occurs (step A5). For the faults of Nos. 2 and 3, when a single fault occurs, the fault has little effect, so no switching request is output. However, when faults occur simultaneously, it is determined that the fault has a great effect. , A switching request signal is output. The number 4 is a line in which the influence of the failure differs between daytime and nighttime. The switching is performed when a failure occurs during the daytime, but not performed when a failure occurs at nighttime. The setting values of these weighting factors and dynamic parameters are stored in the command line interface 4.
And customizing from the network management system 5, flexible switching control can be realized.

Although the present invention has been described based on the embodiments, the present invention is not limited to these embodiments, and it is understood that alterations and improvements are possible within the ordinary knowledge of those skilled in the art. Of course.

[0026]

According to the present invention, a switching judgment function for judging a switching criterion is formulated, a weighting coefficient is set for each fault location, and the weighting coefficient is reflected in the switching judgment function.

Therefore, according to the present invention, when the condition is switched in accordance with the failure detection location, the influence of the failure is relatively small, so that the setting is performed so that the switching does not occur in the conventional redundant circuit control device. If there is a need to perform switching when a plurality of faults in the port being performed overlap, the active system can be switched to the standby system.

Further, according to the present invention, the weighting coefficient of the switching determination function is formulated using time, traffic volume, and the like as parameters, and the weighting coefficient can be dynamically changed.

For this reason, according to the present invention, for example, when a fault occurs in the daytime for a certain fault, switching is performed, but when a fault occurs at night, switching is not performed. Switching criteria can be dynamically changed for dynamic parameters such as traffic volume.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a redundant circuit control method according to the present invention.

FIG. 2 is a flowchart showing the operation of the redundant circuit control method of the present invention.

FIG. 3 is a diagram showing a weight setting file of the redundant circuit control method of the present invention.

FIG. 4 is a diagram showing a dynamic parameter setting file of the redundant circuit control method of the present invention.

FIG. 5 is a diagram illustrating a weight setting file and a dynamic parameter setting file according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 active system 2 standby system 3 duplex switching control circuit 4 command line interface 5 network management system 11 data processing device 12 storage device 13 weight setting file storage unit 14 dynamic parameter setting file storage unit 15 parts (port)

Claims (3)

(57) [Claims] 1. A duplex circuit control method for switching an operation of an information processing device duplexed to an active system device and a standby system device from the active system device to the standby system device, wherein the active system device is configured. For each port, a step of setting a weight setting that is proportional to the magnitude of the effect of the failure and that is in accordance with the time of the failure occurrence; a step of detecting the occurrence of the failure in the port; A duplex circuit control method, comprising: a step of collectively evaluating a failure in a port according to the weight setting; and a step of switching an operation from the active apparatus to the standby apparatus according to the evaluation. 2. A machine-readable recording medium storing a duplex circuit control program for switching an operation of an information processing device duplexed to an active device and a standby device from the active device to the standby device. In the process, for each port configuring the active system device, a process of recording a weight setting in proportion to the magnitude of the effect of the failure occurrence and according to the failure occurrence time, and detecting the occurrence of the failure in the port Causing the processor to execute a process, a process of collectively evaluating faults in all ports in which a fault is detected according to the weight setting, and a process of switching operation from the active device to the standby device according to the evaluation. A recording medium on which a duplicated circuit control program is recorded. 3. A duplex circuit control device for switching an operation of an information processing device duplexed to an active device and a standby device from the active device to the standby device, wherein the active device is configured. For each port, a weight setting storage unit that is proportional to the magnitude of the effect of the failure and records a weight setting according to the failure occurrence time, and detects the occurrence of the failure in the port and detects the failure. In a case where failures in all ports are collectively evaluated according to the weight setting, and when switching from the active device to the standby device is performed, a data processing unit that transmits a switching request signal; and the active system according to the evaluation. And a duplex switching control means for switching the operation from the device to the standby device. Place.