KR19990016747A - User Command Control Device and Method for Preventing System Overload - Google Patents

Abstract

The present invention relates to a user command control apparatus and method for preventing a system overload, the apparatus of the present invention is a command list file that stores the syntax and syntax for each command available and the type and characteristics of each command parameter, the system operator An initialization device that performs initialization upon logging in to use the system, an instruction list table that reads and loads the command list file from the initialization device, an overload table that stores an overload level value of the current system, and A token splitter for dividing a command into token units and outputting a list of tokens, and a syntax for outputting an error message when an error occurs by checking whether the token list is received and whether it is proper to a grammar. Analysis device, the grammar analysis device Inputting the token list outputted from the received token list, analyzing the meaning of the token list, and outputting an error message if an error occurs, and outputting the token list if appropriate, and a token list output from the semantic analysis device. It consists of a command execution device that accepts and executes the corresponding command, which has the advantage of improving the availability of the system.

Description

User Command Control Device and Method for Preventing System Overload

The present invention relates to an apparatus and a method for controlling a user command for preventing a system overload, and in particular, each operator (service operation manager, managing this in a service control system (SCP), which is one of the devices constituting an intelligent network). System maintenance manager, system operation manager, service data manager) decodes the input command to check whether there is a grammar error, whether the parameter input range is correct or whether the command can be input under system overload, and so on according to the system load. The present invention relates to a user command control apparatus and method for preventing a system overload to execute or block a command.

The intelligent network service processes a service call (input transaction) originating from the service performing exchange and transmits its result (output transaction) to the service performing exchange again. Such a service control system performs fault tolerance and real-time processing. Is required. Therefore, such a service control system must guarantee the reliability of hardware components, maintain high availability at the network level, and for this purpose, various methods such as failure detection and isolation, call handling traffic adjustment by system overload control method, etc. I use it.

In addition, the service control system may generate an overload when the processing limit of the system is exceeded due to the large number of calls, and thus, the service control system cannot be controlled by performing an abnormal operation unexpectedly. However, conventionally, in a situation where a decrease in call processing performance due to such a system overload occurs, an unnecessary instruction is executed to further increase the system overload, that is, a monopoly or a system of a central processing unit (CPU). There was no effective way to control traffic spikes on a local area network (LAN) that is responsible for the communication functions between processors. In other words, if all commands are always allowed to an operator who lacks expertise in system hardware or software, there is always a potential cause of system overload due to operational skill or mistakes.

Therefore, in order to solve such a problem, in the conventional service control system, an element-specific measurer (response time measurer, CPU usage measurer, transaction wait rate measurer, etc.) for overload monitoring is placed on each processor to monitor overload. That is, the monitoring measuring instruments report the overload monitoring result to the overload comprehensive determiner located in the system control management processor, the overload comprehensive determiner determines the overload level by determining the overload of the entire system based on the result, and the system by the overload controller When the overload mechanism is in operation, it is designed to adjust the system load in real time according to the level.

When the factors that generate the system load are classified, they can be roughly classified into internal factors and external factors such as network traffic congestion. It is used to control the load by external factors, and is caused by the load due to internal factors, that is, the fault or error of the software and hardware components constituting the system, or due to the inexperienced operation of the operator. There is no way to control the load due to internal factors that occur when performing tasks that place a heavy load on the system in the event of a mistake or the nature of the system software, and these internal and external loads will overlap. The system is under heavy pressure and the availability of the system Uh, and eventually it becomes the system will go down to the service stopped.

In order to ensure the stable operation and high availability of the system, the most important thing is the prevention by proactive detection. However, in the event of overload despite these precautions, system availability should be maximized by suppressing its spread and eliminating all possible sources of load. The reason for this is that if the proper response is not taken in the nature of the overload, the call processing capacity drops rapidly and the call discard situation (i.e., the overload mechanism of the service control system starts from level 4 when overload occurs) is very short. This is because one-third of the calls are discarded, and two-thirds are discarded at level 5, and at level 6, UPU: User Part Unavailable message is reported to the network.

The overload detector, which detects the occurrence of overload, notifies the fact to the overload controller located in the system control processor so that the overload control function operates immediately. However, the overload control is suppressed to the maximum and the causative factor is quickly removed. It is even more important to minimize the impact on system availability in advance.

Therefore, in the present invention, in order to solve the above problems, after determining the priority of each command for each command, and specify an overload level according to the priority, according to the overload level of the command and the current overload level of the system The present invention provides an apparatus and method for controlling a user command for preventing a system overload that operates and controls a system to remove an overload threat factor caused by internal factors.

The apparatus provided by the present invention includes a command list file in which the syntax and syntax for all available commands and types and characteristics of parameters of each command are stored by field, and the system operator logs in to use the system. An initialization device for performing initialization for the initialization, an instruction list table for loading and loading the command list file in the initialization device, an overload table for storing an overload level value of the current system, and an arbitrary command by the logged-in operator. In the case of inputting a token splitting device for dividing the input command into token units and outputting a list of tokens, and checking whether the grammar is proper by receiving the token list output from the token splitting device, an error message is generated when an error occurs. Output the list of tokens, if appropriate Inputs the grammar analysis device and the token list output from the grammar analysis device, and checks the number of parameters, the parameter type, the range of parameter values, the command enabler, and the overload level of the token list. A semantic analysis device for outputting and outputting the token list if appropriate, and a command execution device for receiving a token list output from the semantic analysis device and performing a corresponding command.

Meanwhile, the method of the present invention reads the command list file and initializes the command list table when a system operator logs in to the system, and then waits for input of the command in the first step. If an arbitrary command is input from the user, the second step of generating the token list by dividing the command into token units and checking whether the token list generated in the second step conforms to the grammar does not cause a grammatical error. If not, the third step of checking the command list table corresponding to the input command to recognize the overload level of the command, the check of the overload table to recognize the current overload level of the system to determine the A fourth step of comparing with the overload rating and a comparison result of the fourth step of the command If the overload rating is lower than the current overload rating of the system, it consists of a fifth step of executing the command.

1 is a configuration diagram for a service control / management system;

2 is a structure diagram of an instruction list file according to an embodiment of the present invention;

3 is a block diagram of a service control device for preventing a system overload according to an embodiment of the present invention;

4 is a flowchart illustrating a service control method for preventing a system overload according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

31: initializer 32: command list file

33: password file 34: command list table

35: token splitter 36: grammar analysis device

37: Overload Table 38: Meaning Analysis Device

39: instruction execution device

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a configuration diagram of a service control / management system, FIG. 2 is a structure diagram of a command list file according to an embodiment of the present invention, and FIG. 3 is a service control device for preventing a system overload according to an embodiment of the present invention. 4 is a flowchart illustrating a service control method for preventing a system overload according to an embodiment of the present invention.

1 is a configuration diagram of a service control / management system. From the standpoint of a network providing an intelligent network service, the present system combines a service control node (SCP) and a service management system (SMS). The system combines the functions of both systems.

Referring to FIG. 1, a service control / management system includes a common channel signaling No. 7 message transfer part processor (CMP) that allows a call initiated by a subscriber using an intelligent network service to be connected to a No. 7 signaling network (CMP). 1), the front end processor (CCP 1, 2: Common Channel signaling Processor 1, 2) (2, 3) to which the input transaction inputted to the CMP (1) is transferred, and operation management and maintenance of the system in case of OAP failure Dual auxiliary operation management processor (MAP: MAintenence standby Processor) (4), and CCP (2, 3) and the back end processor (SLP: Service Logic Processor 1, 2) connected to the LAN (9, 10) (5, 6), an Operation Administration Processor (OAP) (7) connected to the LANs (9, 10) and responsible for the operation management and maintenance of the system, and subscriber data management and service of the intelligent network service. Processor managing service status (Service Management Processo r) (8), the service subscriber database (15, 16) connected to the SLP1, 2 (5, 6) to provide subscriber and service operation information, and the OAP (7) connected to the subscriber and service operation A system node database (17) for providing information, an alarm monitor (18) and an audible alarm (19) for performing alarm processing when an error occurs in the system by the management of the OAP (7), and the SMP (8). Service subscriber master database 20 for providing data, a plurality of work seats 13 for inputting various commands to the service control / management system, and the work seats 13 for LAN 9, 10) is configured as a terminal server 14 to connect. At this time, the service processing memory databases 11 and 12 are built in the SLP1 and 2 (5, 6).

In the service control / management system having the above configuration, first, when a call initiated by a subscriber using an intelligent network service, that is, an input transaction is inputted to a CMP 1 connected to a NO.7 signaling network via a service exchanger, The CMP 1 transmits a protocol message to CCP1, 2 (2, 3), which is a front end processor. Then, the CCP1, 2 (2, 3) is the SLP 1, 2 (the latter processor through the LAN (9, 10) through the signal connection control unit on the embedded NO.7 protocol layer and the transaction sublayer of the Q & A application part. The call is divided into 5 and 6).

The SLPs 1, 2 (5, 6), who have received the call, perform the dialogue handler processing on the protocol to the input transaction, and service subscriber control information in the internal memory database 11, 12 in order to respond to each service. Access to generate a response message. Then, the generated response message is transferred back to the corresponding processor (CCP) of the duplicated CCP 1, 2 (2, 3) in the reverse order and transmits the response message for the query call to the service exchanger through the signaling network.

Here, each processing device is configured in redundancy to satisfy high performance and reliability. In addition, OAP (7), the processor in charge of the operation management and maintenance of the system, can be used when the system is first started or initialized, or system configuration and operation data management, overload comprehensive judgment and control, processor monitoring and switching, and restarting are performed. Perform the functions required for all operations. The most important role of the OAP 7 function is to monitor each hardware component and call processing process in order to ensure service continuity, isolate the corresponding part in case of failure, minimize failure propagation, and recombine after recovery is completed. Overload level by combining the fault management function that enables normal operation by reconfiguration and the measurement data reported by the overload monitor / measurer located in CCP 1, 2 (2, 3) and SLP 1, 2 (5, 6) It is a role to determine and control the overall load of the system.

The SMP 8 performs an overall function related to services such as changing or verifying subscriber data and a service number and service state management function.

FIG. 2 is a diagram illustrating a structure of a command list file according to an embodiment of the present invention. The command list file stores syntax and types of parameters and parameters for each command by field, and defines and manages fields. Thus, when adding a new command or deleting an unnecessary command, it is possible to change a new request by simply changing a field value stored in a file or adding or deleting a record corresponding to the command without changing the command syntax interpreter software configuration.

Referring to FIG. 2, the list file structure of the command input by the system operator includes a command name area (COM_ID) 21, a program file name area (PROG_ID) 22 on which the command is actually executed, and a minimum input parameter. Number area (PAR_MIN) 23, maximum input parameter number area (PAR_MAX) 24, user-classified area (USER_CLASS) 25 for command usage, and overload class area (OVLD_LEVEL) (26) for command usage. ), A data type area (PAR_TYPE) 27 indicating whether the parameter data is numeric or character, a minimum input value area (LOW_BOUND) 28, and a maximum input value area (UPPER_BOUND) 29. The minimum input value area (LOW_BOUND) 28 and the maximum input value area (UPPER_BOUND) 29 indicate that the data type is designated as a number (N: Numeric) in the data type area (PAR_TYPE) 27. Valid only for, the data type is character (A: Alphabetic) Specified or common letters and numbers: If specified in (AN Alphanumeric) is displayed as "0".

FIG. 3 is a block diagram of a service control apparatus for preventing system overload according to an embodiment of the present invention. Referring to FIG. 3, the service control apparatus of the present invention may include syntaxes for all available commands and parameters for each command. The command list file 32 stores the types and characteristics by field, the password file 33 storing the authority to use the commands, and the initialization of the environment such as user settings when the system administrator logs in to use the system. An initialization device 31 to perform, an instruction list table 34 which reads and loads the command list file 32 from the initialization device 31, and an overload table for storing an overload level value of the current system ( 37), and when the logged-in operator inputs an arbitrary command, the inputted command is divided into token units to output a list of the tokens. A grammar for outputting an error message if an error occurs by checking whether the token splitting device 35 and the token list output from the token splitting device 35 are valid, and if the error is correct. When an error occurs by receiving the token list output from the analysis device 36 and the grammar analysis device 36 and checking the number of parameters, the parameter type, the range of parameter values, the command enabler, and the overload level of the token list. A semantic analysis device 38 for outputting an error message and outputting the token list if appropriate, and a command execution device 39 for receiving a token list output from the semantic analysis device 38 and performing a corresponding command. do.

At this time, the semantic analysis device 38 compares the overload rating of the input command with the overload rating of the current system stored in the overload table 37, and when the overload rating of the input command is lower than the overload rating of the system. The token list is output to the command execution device 39 so that the command is executed. Otherwise, an error message for rejecting the command execution is output at the same time as the current overload level output.

The present invention is to determine whether to perform the operation after determining whether to allow the system control in accordance with the load state of the input command determined according to the current system load status and the priority of the input command without immediately performing the operator's command as described above For this purpose, the syntax for all commands, the type of expected input parameters, the minimum number of parameters, the maximum number of parameters, the operator identification process to ensure that the commands entered are performed by a user with proper authority, and the objects to be actually executed. It decides whether to execute through a series of processes such as checking the position of operator command in the form.

4 is a flowchart illustrating a service control method for preventing a system overload according to an embodiment of the present invention. Referring to FIGS. 3 and 4, an operation of a service control apparatus having the configuration as described above may be performed first with respect to all commands. The command list file (34), which stores the command overload class and characteristic information, and the overload table (37), which stores the overload status of the current system, are classified by field. After that, first, when the system operator logs in to the system (S401), the initialization device 31 reads the command list file 32 and initializes the user environment such as initializing the command list table 34 (S402). ), And waits for an input of a command (S403). When an arbitrary command is input from the logged-in user, the token dividing device 35 divides the command into token units to generate a token list (S404), and generates the generated token list in the grammar analysis device 36. To pass.

Then, the grammar analysis device 36 checks whether the token list is grammatical suitable (S405), if a grammatical error occurs, outputs an error message (S408) and waits for input of a new command, and then a grammatical error. If does not occur, check the command list table 34 corresponding to the input command to recognize the overload level of the command and transfer it to the semantic analysis device 38, the semantic analysis device 38 is the overload table After checking the current overload rating of the system by checking 37, the overload rating of the input command is compared with the overload rating of the current system (S406).

As a result of the comparison (S406), if the overload level of the command is lower than the current overload level of the system, the token list for the input command is transmitted to the command execution device 39 to perform the corresponding command (S407), and if not, an error After outputting the message (S408), it waits for input of a new command.

At this time, in the initialization step (S402) of the user environment, additional operations such as user setting for the logged-in operator, environment initialization according to the terminal type, system logo output, and the like are performed, and the overload class comparison step of the semantic analysis device 38 ( In step S406, the function of analyzing the meaning of the parameters of the input command to determine whether there is an error is processed in parallel.

The semantic analysis of the semantic analysis device 38 includes the number of parameters, the parameter type, the range of parameter values, the command user, the overload rating, and the like. The overload class of the command is compared with the current system overload class determined by the OAP 7 of FIG. 1 and stored in the overload table 37 to determine whether to perform an input command.

As such, when the system is overloaded, that is, when the overload level of the input command is higher than the current overload level of the system, the execution of the input command is rejected. If the current overload class (overload table 37 value) of the system is smaller than the class of the input command stored in the command list table 34, the execution of the input command is normally processed.

The present invention as described above relates to a control method for allowing only control commands that are very important for system operation by executing or blocking a command for operating and controlling the system according to each overload level after checking the overall system load. It provides the effect of increasing the availability of the system by minimizing the load on the system in case of overload. In addition, it is possible not only to find out whether a user with proper authority has input, but also to add a new command or delete an unnecessary command, it is possible to change the command or parameter type by simply manipulating a file without changing the program of the command syntax interpreter itself.

Therefore, it can be changed at any time during the operation of the system, so that the command interpreter itself can be executed without interruption, and if you only know the command list file structure, the environment changes that occur during the life cycle of the software such as the addition and change of functions. Its flexibility is easy to adapt to, and it requires no extra effort for maintenance.

Claims (7)

Command list file that stores the syntax of all available commands and types and characteristics of each command parameter by field, and When the system operator logs in to use the system, an initialization device that initializes the environment, such as user settings, A command list table read and loaded from the command list file by the initialization device; An overload table that stores the current system overload level, A token dividing apparatus for dividing an input command by a token unit and outputting a list of tokens when the logged-in operator inputs an arbitrary command; A grammar analysis device that receives the token list output from the token splitting device and checks whether the grammar is proper and outputs an error message if an error occurs, and outputs the token list if it is proper; Inputs the token list output from the grammar analysis device and checks the number of parameters, parameter type, parameter value range, command available user, and overload class of the token list, and outputs an error message if an error occurs, and if appropriate, the token. A semantic analyzer that outputs a list, And a command execution device configured to receive a token list output from the semantic analysis device and perform a corresponding command. The method of claim 1, The semantic analysis device The overload level of the input command is compared with the overload level of the current system stored in the overload table. When the overload level of the input command is lower than the overload level of the system, the token list is output to the command execution device so that the command is executed. And if not, outputting an error message. The method of claim 1, The command list file is Command name field (COM_ID), The program file name area (PROG_ID) where the command is actually executed, Minimum input parameter area (PAR_MIN), The maximum number of input parameters (PAR_MAX), User-classified area (USER_CLASS) where commands are available, Command overload class area (OVLD_LEVEL), A data type field (PAR_TYPE) indicating whether the data type of the parameter is numeric or character, The minimum input field (LOW_BOUND), User command control device for preventing the system overload, characterized in that the maximum input value area (UPPER_BOUND). The method of claim 3, wherein The minimum input value area LOW_BOUND and the maximum input value area UPPER_ BOUND are It is valid only when the data type is designated as a number in the data type area PAR_TYPE, and when the data type is designated as a letter or when the letter and the number are specified in common, the system is overloaded. User command control device for prevention. In the service control method of the service control system used to maintain high reliability and availability of intelligent network services, In the situation where the call processing performance decreases due to the system overload, unnecessary instructions are executed to monopolize the central processing unit (CPU) or to amplify the traffic on the local area network (LAN) that is responsible for communication between system processors. To avoid weighting the system, specify the overload class for all commands and check the overload class of the current system, and if any command is entered, only if the overload class of the command is lower than the overload class of the current system. User command control method for preventing the system overload, characterized in that to perform. The method of claim 5, The service control method for preventing the system overload It has a command list file that stores the command overload class and characteristic information by dividing the syntax and type of each command's syntax and parameters by field, and the overload table that stores the current system's overload status. , After the system operator logs in to the system, the first step of reading the command list file to initialize the command list table and waiting for input of the command, A second step of generating a token list by dividing the command into token units when an arbitrary command is input from a user while waiting for input of the command in the first step; A third step of recognizing an overload level of the command by checking a command list table corresponding to an input command if a grammar error does not occur by checking whether the token list generated in the second step is grammatical; A fourth step of checking the overload table to recognize the current overload level of the system and comparing it with the overload level of the command recognized in the third step; And a fifth step of performing a corresponding command when the overload level of the command is lower than the current overload level of the system, as a result of the comparison of the fourth step. The method of claim 6, If the error in the grammar resulted in the error in the grammar step 3, If the overload level of the command is higher than the current overload level of the system as a result of the comparison in the fourth step, outputting an error message and then waiting for input of a new command.