KR100215571B1 - Data backup method of an exchange - Google Patents

Abstract

The present invention relates to a data backup method of an electronic switching system for backing up data to a local system in a distributed manner and collectively backing up data to a central backup device in a predetermined condition.

The method of the present invention is an electronic switching system equipped with an operation and maintenance processor (OMP) which is dedicated to the operation and maintenance of a plurality of local processors and systems and can store backup data on a disk. Checking a state of an active local backup storage device by a database management system on the local processor when an application program requesting data backup; Backing up data to the active storage device if the active local backup storage device is normal and transferring the result to an application program; If the active local backup storage device is FULL, store backup data in a standby local backup storage device, request a backup to a database management system on the OMP, and then backup data of the active backup storage device to the OMP. Transmitting; And when the backup data is transmitted, OMP's database management system stores the data in a disk storage device and delivers the result to a database management system on the local processor.

Description

Data backup method of electronic switch

The present invention relates to a method of backing up data in an electronic switchgear, and more particularly, a method of backing up data to a local backup system in a distributed manner in a predetermined manner and then backing up data to a central backup device in a batch. The data backup method.

In general, the electronic switchboard is distributed with a plurality of processors to perform their respective functions, and is managed by exchanging control information between these processors. These processors are hierarchical and are generally managed by a processor (OMP) that performs operations and maintenance.

For example, in the TDX-10 series of electronic exchangers, as well known in the processor system, a numbering translation processor (NTP), an interconnection network processor (INP), and an access switching processor (INP) connected via a bus are well known. It consists of an Access Switching Processor (ASP), a Man-Machine Processor (MMP), an Operation and Maintenance Processor (OMP), and an RS232C communication between the MMP and a personal computer (or console). do.

Here, the access switching processor (ASP) performs traffic control, SS No. 7 maintenance, maintenance and operation management service of the access switching system (ASS), and the INP (interconnection network processor) is a call using a space switch. Perform search and management

In addition, NTP (Number Translation Processor) responds to the number translation request from each ASP and performs route control function, and OMP (Operation and Maintenance Processor) manages a series of operation and maintenance related functions in the system. . Therefore, the magnet tape (MT) and the disk is controlled by the auxiliary storage device required for operation and maintenance. In this case, the fare record, statistics, maintenance, operation management information, etc. are stored in the MT, and the generic program and data are stored in the disc.

On the other hand, there are a lot of data to be managed in electronic switchboards, which are each distributed in a database and managed by a data management program (DBMS). For example, a semi-permanent connection (hereinafter referred to as SPC) should provide a semi-permanent connection path between two subscribers during normal operation. For this purpose, each of the destination ALS and the originating ALS has a database related to the connection. .

As such, there are various ways to access the distributed database in the electronic switchboard. The database is generally accessed through a database management system (DBMS). That is, in a distributed database environment, if a particular processor wants to access a database, the DBMS is used to access different processors.

In addition, data managed by each distributed DBMS should be backed up at regular intervals to prepare for data loss. A process of data backup in the prior art is as follows.

When a data backup request from an application running on any processor is entered into a database management system (DBMS), the database in that processor's Data Base Support Group (DBSG) local memory is being backed up. The backup data is transferred to the OMP Data Base Backup Group (DBBG) block, and the contents of the processor load data (PLD) on the disk are updated.

Therefore, conventionally, each time backup data is generated from an application (AP), the corresponding processor must transmit the backup data to the OMP. Therefore, the IPC transmission increases rapidly between the processor and the OMP, so that the IPC cannot be properly delivered. When a backup operation is performed in a non-transmitted state, data is temporarily stored in a local buffer of a corresponding processor. In this case, when a buffer full occurs, the DBMS can no longer perform a backup request.

Moreover, as backup requests become more frequent, the improvement to OMP causes the signal to increase, increasing the load on the OMP.

Accordingly, the present invention has been made to solve the above problems, and provides a method for efficiently backing up data while preventing data loss and reducing IPC burden by efficiently handling data backup requests of applications. have.

In order to achieve the above object, the method of the present invention is dedicated to the operation and maintenance of a number of local processors and systems in the electronic switch system equipped with an operation and maintenance processor capable of storing backup data on disk Checking a state of an active local backup storage device by a database management system on the local processor when an application program executed on the local processor requests data backup; Backing up data to the active storage device if the active local backup storage device is normal and transferring the result to an application program; If the active local backup storage device is FULL, store backup data in a standby local backup storage device, request backup to a database management system on the OMP, and then transfer backup data of the active backup storage device to the OMP. Doing; And storing the data in a disk storage device by the OMP database management system when the backup data is transmitted, and transferring the result to a database management program on the local processor.

1 is a conceptual diagram illustrating backup of data of a subscriber access processor in an electronic switch according to the present invention;

2A and 2B are flow charts illustrating the flow of a method of backing up data in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

10: subscriber access processor block 11: application program (AP)

12, 21: Data management program (DBMS) 13: Memory data

14: Local backup storage 20: Operation and maintenance processor block (OMP)

30: Central Backup Storage

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The structure of a general electronic switching system suitable for the present invention is applied to a plurality of access switching processors (ASPn: 10) and an electronic switching system included in an access switching network for accommodating a subscriber or a trunk, as shown in FIG. It contains an Operation and Maintenance Processor (OMP: 20) to handle the operation and maintenance of the system.

Referring to FIG. 1, an application program (AP) 11 is executed in the ASPn 10, data stored in the storage device 14 is managed by a database management system (DBMS) 12, and an OMP 20 is managed. ), Storage devices are managed by a database management system (DBMS) 21.

At this time, according to the present invention, there is a storage device 14 for temporarily backing up data in the ASPn 10, which includes an active file 15 for storing backup data and a standby file 16. . Therefore, if the backup data is stored in the current active file and the storage space of the file is full, the data is converted into the standby state to perform the data backup operation to OMP, and the standby file is changed to active and new backup data is stored there. Will be.

As such, in the present invention, when an application requests a data backup, the data management system (DBMS) 12 does not directly transfer the data to the OMP 20 for backup, but to some extent, backup data to its own storage device 14. After storing the data is more than a certain degree at this time, the backup data is sent to the OMP 20 at once.

By distributing and storing backup data in this way, an increase in IPC due to backup can be prevented and reliability is increased because data is distributed.

Furthermore, by storing the backup data of the local system into active and standby, data loss can be prevented during backup.

Next, a process of performing a data backup operation according to the present invention will be described in detail with reference to FIGS. 2A and 2B.

If data backup is required from the application program block, data verification and error detection are performed (101, 102). Subsequently, if applicable data, the database of the local memory data is changed and it is determined whether the data is normally performed (103).

If the data is successfully executed, it is checked whether data can be written to the currently active backup file, that is, if the active file is full, and if not, the data is backed up to the current active file (104, 105, 106, 107).

Subsequently, it is determined whether the backup operation is normally performed, and if the operation is normally performed, the execution result is transmitted to the application program block (108, 109).

If it is not applicable data or the normal performance is not performed, the application program block notifies the result of abnormal performance (that is, transmits an error message) and ends (110).

On the other hand, if the active file is full, the pointer of the backup file is moved to the standby file, and if it cannot be backed up by a failure other than the full file, the state is checked and corrected, and then the possibility of writing is again checked (120 to 123). ).

After the backup is requested, the new backup data is stored in the standby file and the entire active file is backed up.

To this end, it is first checked whether the OMP is operating normally, and if it is operating normally, the data of the active backup file is transferred to the OMP, and the transferred data is stored in the PLD of the corresponding processor of the disk (124 to 130).

Subsequently, if the backup data is normally stored on the disk, the change result according to the completion of the backup is transmitted to the data management system of the corresponding processor.If the disk is hard to write, the data is stored in the temporary buffer until the operation of writing to the disk is successful. It repeats (131-133).

As described above, the data backup method according to the present invention can prevent the overload of OMP by reducing the IPC between the local processors and the operation and maintenance processor in the electronic switchboard, and reliability by temporarily storing the data temporarily Can improve.

Claims (1)

In an electronic switching system equipped with an operation and maintenance processor (OMP) that is dedicated to the operation and maintenance of multiple local processors and systems, and that can store backup data on disk, Checking a state of an active local backup storage device by a database management system on the local processor when an application program executed on the local processor requires data backup; Backing up data to the active storage device if the active local backup storage device is normal and transferring the result to an application program; If the active local backup storage device is FULL, store backup data in a standby local backup storage device, request a backup to a database management system on the OMP, and then backup data of the active backup storage device to the OMP. Transmitting; And OMP's database management system stores the data in a disk storage when the backup data is transmitted, and transmits the result to a database management system on the local processor. .