KR100290624B1 - Error check method of electronic switching system database using relation compare of data file - Google Patents

Abstract

The present invention relates to an error checking method of an electronic switchgear database using a relation comparison of a data file. The present invention relates to a relation between a processor mounted data (PLD) file stored in a memory of an electronic switchgear and a PLD file stored on a disk. By comparing the data with each other, it is possible to prevent the error caused by the inconsistency of the relation stored in the memory and disk, and provides the error information on the part where the error occurred so that the error can be corrected before the failure occurs. There is an advantage to improve the performance of the system, and therefore, an advantage of providing the operator with ease of system maintenance.

Description

Error check method of electronic switching system database using relation compare of data file

The present invention relates to an error checking method of an electronic switchgear database using a relation comparison of a data file, and relates to a relation of a processor load data (hereinafter referred to as a PLD) file stored in a memory inside the electronic switchgear. The present invention relates to an error checking method that compares a relation of a PLD file stored in a disk with each other and prevents an error due to a mismatch between a memory and a relation stored in the disk.

When you run a system, you can sometimes assume that an unexpected situation has occurred that damages the database within the system.

In this case, the most effective way is to compare the relation currently stored in the system memory with the relation on disk.

However, the data stored in the system memory can be examined immediately using the query method on the system, but the data stored on the disk can be checked by loading it from another system or by stopping the processing that is being performed by the currently running system. You have no choice but to read it.

This method is inconvenient to interrupt a series of tasks currently being performed, there is a problem that it takes a lot of time to find the inconsistency because the data of the disk must be read directly by using another processor or another system in the system.

SUMMARY OF THE INVENTION In view of the conventional problems as described above, the present invention allows the relation of a file used in a currently operating processor and a relation of a corresponding file stored on a disk to be periodically checked or periodically requested by an operator. The goal is to implement a method to prevent errors from being mismatched.

1 is a schematic view showing a part of an electro-electric exchanger to which the present invention is applied.

Fig. 2 is a diagram showing the relation of the PLD file relation of the disk in the electronic switchboard and the relation of the PLD file of the memory in the electronic switchboard used in the present invention.

<Description of the reference numerals for the main parts of the drawings>

1: PLD file in memory 11, 12: relation

2: PLD file in the disk 3: Subscriber Interchange Subsystem

31, 41, 51: matching exchange processor 4: relay line matching exchange subsystem

5: No.7 signal matching exchange subsystem 6: connection network subsystem

61: network control processor 62: number translation processor

7: Central control system 71: Operation and maintenance processor

72: input and output control processor 73: central control maintenance processor

In order to achieve the above object, in the error detection method of the mismatch between the relation information of the data file stored in the system memory and the data information stored in the disk,

A first step of determining whether an error checking execution time set by an operator is reached;

A second process of reading a relation of a data file corresponding to the processor to be inspected from the disk when an error checking execution time is reached or a request for execution by a direct command of an operator is input;

A third step of comparing the relation header stored in the memory of the processor in the read relation;

A fourth process of comparing relation data read after the third process with relation data stored in a memory of the processor;

And a fifth process of notifying each operator of the relation header and the data when the data is matched with each other.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram showing an example of a system and a system disk to which the present invention is applied. The system illustrated as an example in the present invention relates to an electron exchanger, which is not limited to the electron exchanger. This applies to systems that use auxiliary storage.

Hereinafter, the system will be described as an electron exchanger from the following.

There are a plurality of processors 3 to 7 having different functions in charge in the electronic switchboard.

That is, an Access Switching Subsystem for Subscriber Lines (ASS-S) 3 for accommodating subscribers using regular telephone lines;

A relay line matching subsystem (ASS-T) (4), which is responsible for the relay line registration;

An Access Switching Subsystem for No. 7 Signaling (ASS-7) 5 which is responsible for matching No. 7 signals when using the common line (No. 7) signaling method;

An Interconnection Network Subsystem (INS) 6 which is responsible for the connection of the respective processors in the electronic switchboard;

A central control subsystem (CCS) 7 for controlling each system is provided.

In addition, there are a plurality of subsystems.

Each of the subsystems is equipped with corresponding processors. Each matching exchange subsystem 3, 4, and 5 performs traffic control No. 7 maintenance and operation management of subscriber and trunk line signaling devices. Access Switching Processor (ASP) (31, 41, 51) is built-in, the connection network sub-system 6 is connected to the Interconnection Network Processor (INP) 61 in charge of the operation management of the switch (61) And a number translation processor (NTP) 62 for translating the station number and the called number of the connected calls, and a processor in charge of operation and maintenance in the central control system 7. Maintenance Processor (OMP) 71, Man-Machine Processor (MMP) 72 and Central Control Maintenance Processor (C) in charge of matching with the operator. CMP) 73 is built in.

In addition, the operation and maintenance processor 71 is connected to the disk 74, which stores the data required in the electronic switch as well as the algorithm implemented in the present invention.

Each sub-system as described above performs signal processing according to the signal type or subscription type of the call when the call is generated from the subscribers, and translates the number of the incoming call and connects the call to other subscribers in other countries or countries. Do this.

In this case, when an unpredictable type of error occurs while a plurality of processors are performing their respective tasks, as described above, an error occurs mainly in the data of the disk 74 or the processor currently in operation. Estimate.

Therefore, it is to check whether the data used in the processor and the data stored in the disk 74 are the same before the above error occurs.

Fig. 2 is a diagram showing the relation of the PLD file relation of the electronic switchboard disk and the memory in the electronic switchboard processor used in the present invention.

Here, relations 11 and 12 of PLD files (1, 2) in memory or disk represent normalized planar files or tables, with each column in the relation being an attribute and a tuple of one row without a repeating group. It is called (tuple).

The comparison is performed to check the state of what kind of error has occurred in the data through mutual comparisons. The comparison method is as follows.

The relation header and the relation data in memory and disk are compared, respectively, using the checksum value of the memory and the checksum value of the disk.

When comparing relation data, if the check-sum of relation data is different from each other, each tuple of relation is compared with each other and the wrong number of tuples and data are output to the operator.

In detail, the comparison function is performed by the operator's command as follows.

First, the operator randomly or periodically executes a memory / disk comparison check command. Upon receiving this, the electronic switchboard reads the information stored in the disk. If the state of the processor to be inspected is normal, the PLD file of the processor is read from the disk to obtain the information necessary for the inspection.

The task target is a disk backup relation and obtains a check-sum of each header and a check-sum of data.

After comparing the data in the memory and the disk, if there is a mismatch between the check-sum of the memory and the check-sum of the disk, a check is started in the unit of the relation's tuple, and the operator is notified by a message to the operator. .

Meanwhile, when the function is to be performed periodically, the execution cycle, time, and execution state are set to allow (ALLOW), and such periodic comparison performance information is stored in a database. Subsequently, the time signal is generated after the time signal is generated at the set time, and when the time signal is generated, the all electronic switch performs comparison. Subsequent executions are the same as the direct command by the operator, and thus will be omitted.

For reference, the information recorded in the header during the relation header check is as follows.

PLD HEADER: PLD header

GDIR (Global Relation Directory)

RDIR: Relation Directory

RDIC: Relation Dictionary

REPTBL (Replicated Relation Table)

TRSCHDTBL (Transaction Schedule Table): Transaction Scheduling Table

TRCONFTBL (Transaction Conflict Table)

DISTRTBL (Distributed Relation Table): Distributed Relation Table

DARITBL (Direct Access Relation Table): Direct Access Relation Table

INDSEQ (index sequence table): INDSEQ table

HASH (hash table): HASH table

After performing the error checking as described above, the operator checks the result of error checking and corrects the data of the part where the error has occurred, so that the system is operated without knowing the data error. do.

As described in detail above, the present invention periodically inspects a system using a relation comparison function, informing an operator that a system database part is damaged, and providing error information on a part where an error has occurred to detect an error before a failure occurs. As a result of the modification, there is an advantage of improving the stability of the operation of the system, thereby accompanying the advantage of providing the operator with ease of system maintenance.

In addition, a preferred embodiment of the present invention is disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (3)

In the method of checking the mismatch between the relation information of the data file stored in the system internal memory and the relation information of the data file stored on the disk, A first step of determining whether an error checking execution time set by an operator is reached; A second process of reading a relation of a data file corresponding to the processor to be inspected from the disk when an error checking execution time is reached or a request for execution by a direct command of an operator is input; A third step of comparing the relation header stored in the memory of the processor in the read relation; A fourth process of comparing relation data read after the third process with relation data stored in a memory of the processor; And the fifth step of informing each operator of the relation header and the data header when it is mutually matched, and determining the error as an error if not matched, and informing the operator of the mismatch information. How to check for errors in the exchange database. The method of claim 1, A step of detecting an item to be compared among table and index data by comparing each element in the header when comparing relation headers in the third process; Comparing a check-sum for each item with respect to the detected item; A third step of comparing individual elements in the mismatched item if the check-sum mismatches in the comparing process; And a fourth step of notifying the operator of the data of the corresponding element when there is a mismatch in the individual element comparison process. The method of claim 1, Comparing the check-sum of the relation data with each other when comparing relation data in the fourth process; A second step of re-compare for each tuple of the relation when the check-sums do not match each other in the comparison process; And a third step of notifying the operator of the number of inconsistent tuples and data when the tuples are inconsistent in the comparison process.