KR100297649B1 - Apparatus and method for disk mirror copying in electronic switching - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk mirror copying apparatus and method for an electronic switching system, comprising: an SRAM which is a dedicated memory for copying a disk mirror in a CCS block; After storing, after reading the data again and copying it to the second hard disk in the standby state, the CCS control unit serving as the main CPU to control the entire CCS block is assigned to mainly serve as an interface between the operator and the disk controller. This reduces the burden on the main CPU, which controls the entire CCS block, and enables faster disk mirror copying.

Description

Apparatus and method for disk mirror copying in electronic switching

In the electronic switching system, in particular, when the operation programs or data stored in each of the redundant hard disks are different from each other, the operation programs or data of the hard disks on which the relatively latest operating programs or data are mounted are different from each other. Relates to a disk mirror copy method to copy to.

In recent years, the all-electronic switching system under development basically performs voice exchange and packet exchange functions, and accommodates ISDN (Integrated Service Digital Network) subscribers. .7 Adopting common line signaling to provide subscribers with fast, accurate and diverse services, and providing a high degree of flexibility in the exchange, processing, accumulation and processing of information. It is known to be able to.

Such an electronic switching system can be largely divided into a Central Control Subsystem (CCS) block, an Interconnection Network Subsystem (INS) block, and an Access Switching Subsystem (ASS) block. The CCS block performs operations and maintenance functions, and performs network management, test and measurement, billing statistics, I / O device control, and dialogue with other systems. The INS block performs a connection function between the ASS block and the ASS block, or between the ASS block and the CCS block. In addition, the ASS block performs most of call processing functions such as subscriber and relay line matching, various signaling devices and packets, and self-operation maintenance.

In the CCS block, the hard disk is configured with redundancy, and the hard disk has data data that provides various operation programs for operating the aforementioned CCS block, INS block, and ASS block, and various data required by the operation program. Are listed. Therefore, when the power of the electronic switching system is turned on, various operating programs and data data stored in the hard disk are read, and then distributed and mounted on the CCS block, the INS block, and the ASS block, respectively. Each redundant hard disk contains the same operating program and data data. When the power of the electronic switching system is turned on, the operating program and data data contained in the active hard disk is read out. It is common.

In an electronic switching system having such a structure, a new operating program or data data may be stored in an active hard disk, and may be different from the operating program or data data stored in a standby hard disk. In this case, a disk mirror copy operation is required to match the contents of the active hard disk with the contents of the standby hard disk.

1 shows a block diagram of a prior art for performing such a disk mirror copy.

Referring to FIG. 1, a conventional disk mirror copy system includes a system console 10, a CCS controller 20, a dynamic random access memory (DRAM) 30, a disk controller 40, and an active state. The first hard disk 50 and the second hard disk 60 in the standby state are included. Here, the CCS control unit 20 is a main CPU that substantially controls the entire CCS block described above, and the DRAM 30 includes various operation programs and data data necessary for the CCS control unit 20 to control the entire CCS block. have.

In FIG. 1, when the operating program or data data recorded on the first hard disk 50 and the operating program or data data recorded on the second hard disk 60 are different from each other, the operator uses the system console 10 to access the CCS. The control unit 20 provides a disk mirror copy command. The CCS control unit 20 that receives the disk mirror copy command transmits the disk mirror copy command to the disk control unit 40. The disk controller 40 reads data from the first hard disk 50 in an active state in response to the disk mirror copy command. The structure of the data contained in the first hard disk 50 is shown in FIG. Referring to FIG. 2, data stored in the first hard disk 50 may include a plurality of file blocks F0 to Fn, each of which comprises one or more sectors, for managing file blocks. Directory block (D) for data, bitmap block (B) for sector management, start position of directory block (D) and file blocks (F0 to Fn) and bitmap block (B) It consists of a structure including the super block (S).

Therefore, in response to the disk mirror copy command, the disk controller 40 reads data from the first hard disk 50 in an active state, but the super block S, the bitmap block B, and the directory block ( D) is first read out and provided to the CCS controller 20, and the CCS controller 20 stores the super block S, the bitmap block B, and the directory block D once in the DRAM 30. .

Thereafter, the CCS control unit 20 reads the super block S, the bitmap block B, and the directory block D stored in the DRAM 30 to the disk control unit 40 again, and provides the disk control unit. 40 denotes a first hard disk 50 in an active state and a second hard disk in a standby state of the super block S, the bitmap block B, and the directory block D provided from the CCS control unit 20. It records in (60) at the same time.

When copying to the super block S, the bitmap block B, and the directory block D is completed, the disk controller 40 reads data from the first hard disk 50 in units of files having a predetermined size. To perform. First, the files read from the first hard disk 50 are stored in the DRAM 30 via the disk control unit 40 and the CCS control unit 20, and then again via the CCS control unit 20 and the disk control unit 40. The first hard disk 50 in the active state and the second hard disk 60 in the standby state are simultaneously recorded. In the conventional disk mirror copy system, the disk mirror copy function is completed by repeatedly performing the above-described operation.

In such a conventional disk mirror copying system, as described above, the CCS control unit 20 is a main CPU that controls the entire CCS block, and the DRAM 30 requires the CCS control unit 20 to control the entire CCS block. Various operating programs and data are loaded. However, since the CCS control unit 20 accesses all the time during the disk mirror copy function, there is a problem that other operation programs for controlling the CCS block cannot be executed during the disk mirror copy function. In particular, considering that the amount of data stored on the hard disk is so large that the time required to execute a disk mirror copy, for example, about 20 to 30 minutes, can be executed. There is a problem that the time is delayed that much.

Therefore, the present invention relatively excludes the access of the main CPU in executing the disk mirror copy, so that if there is a service request to another operation program even during the disk mirror copy, the disk mirror copy time can be executed. It is an object of the present invention to provide a disk mirror copying apparatus and method which can be relatively shortened.

According to one aspect of the present invention for achieving the above object, in an electronic switching system, it is mounted in a CCS block having an operation and maintenance, network management, test and measurement, billing statistics, input and output device control functions, A disk mirror copying apparatus for mirror copying data of the first hard disk containing the latest data to a second hard disk among the configured first hard disk and second hard disk, comprising: a disk mirror copy dedicated memory; When a disk mirror copy command is input, reading data of the first hard disk, storing the data in the disk mirror copy dedicated memory, and copying the data stored in the disk mirror copy dedicated memory to the second hard disk By repeating a plurality of times, the amount of data read once from the first hard disk is limited to a predetermined amount, and when the entire data of the first hard disk is copied to the second hard disk, the result is reported. A disk controller; CCS control unit which acts as a main CPU to control the entire CCS block, and transmits the disk mirror copy command from the operator to the disk control unit, and receives a report that the disk mirror copy is completed from the disk control unit, the CCS control unit for transmitting it to the operator ; It includes a system console in charge of the interface function between the CCS control unit and the operator.

According to another aspect of the present invention for achieving the above object, in the electronic switching system, mounted in the CCS block, the latest data in the first hard disk of the redundant first hard disk and the second hard disk, And a disk controller for controlling the first and second hard disks, a CCS controller serving as a main CPU for controlling the entire CCS block, and a system console for interfacing with the CCS controller and an operator. And a disk mirror copying method using a disk mirror copying apparatus having a disk mirror copy-only memory, wherein: when an operator provides a disk mirror copy command to the CCS controller using the system console, the CCS controller is configured to copy the disk mirror. Transmitting a copy command to the disc controller; In response to the disk mirror copy command, the disk controller reads the data of the first hard disk, stores the data in the disk mirror copy dedicated memory, and then stores the data stored in the disk mirror copy dedicated memory in the second hard disk. A second step of repeating the copying process for a plurality of times and limiting the amount of data read once from the first hard disk to a preset amount; A third step of checking, by the disk controller, the amount of remaining copy data remaining on the first hard disk each time the data recorded on the first hard disk is copied to the second hard disk by the predetermined amount; A fourth step of, if the remaining copy data amount is less than or equal to the preset amount, copying the remaining copy data to the second hard disk, and then reporting the completion of the disk mirror copy to the CCS control unit; The CCS control unit includes a fifth step of notifying the operator of the result through the system console when receiving the report that the disk mirror copy is completed.

1 is a view showing a disk mirror copying apparatus of the prior art,

2 is a general structural diagram of data stored in a hard disk of an electronic switching system;

3 is a view showing a disk mirror copying apparatus according to a preferred embodiment of the present invention;

4 is a flowchart illustrating a disk mirror copying method according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: system console 200: CCS control unit

300: SRAM 400: Disk Control Unit

500, 600: Hard Disk

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 shows a disk mirror copying apparatus according to a preferred embodiment of the present invention. In FIG. 3, the disk mirror copy apparatus includes a system console 100, a CCS controller 200, a static random access memory (SRAM) 300, a disk controller 400, and an active first hard disk ( 500) and a second hard disk 600 in a standby state.

Referring to FIG. 3, the system console 100 provides a disk mirror copy command from an operator to the CCS controller 200, and provides the operator with a disk mirror copy progress result from the CCS controller 200.

The CCS control unit 200 acts as a main CPU to control the entire CCS block described above, and transmits a disk mirror copy command input from the system console 100 to the disk control unit 400, and the disk mirror from the disk control unit 400. The copy progress is checked and delivered to the system console 100.

The first hard disk 500 in the active state and the second hard disk 600 in the standby state contain operating programs and data data for operating the electronic switching system. For example, it is stored in the data structure shown in FIG.

The disk controller 400 is a sub CPU that controls general operations of the first hard disk 500 and the second hard disk 600. When the disk controller 400 receives a disk mirror copy command from the CCS controller 200, the disk controller 400 is updated. Search the hard disk containing the operating program or data data, and read the operating program and data data from the hard disk by a preset amount and store the data in the SRAM (300), and then re-read the operating program and data data stored in the SRAM (300) By repeating the recording operation on the second hard disk 600, the disk mirror copy is completed, and the result is provided to the CCS controller 200.

On the other hand, the SRAM 300 is a memory provided for the disk mirror copy, the operation program and the data data is stored and read under the control of the disk controller 400.

The disk mirror copying apparatus according to the embodiment of the present invention having such a configuration has an SRAM instead of a conventional DRAM loaded with an operating program or data data, and utilizes the disk mirror copy as a memory for exclusive use of a disk mirror. It greatly reduces the function of the main CPU.

4 is a flowchart illustrating a disk mirror copying method according to an embodiment of the present invention, wherein the disk mirror copying method of FIG. 4 is performed using the disk mirror copying apparatus of FIG. 3. Therefore, the disk mirror copy operation according to the embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

First, when an operator provides a disk mirror copy command to the CCS control unit 200 using the system console 100 (S1), the CCS control unit 200 transmits a disk mirror copy command to the disk control unit 400 (S2). ).

When the disk mirror copy command is input from the CCS controller 200, the disk controller 400 searches the first hard disk 500 and the second hard disk 600 to determine a hard disk operating in an active state (S3). ). As a result of the search, if the first hard disk 500 is active, the disk controller 400 detects the total data capacity stored in the first hard disk 500 and reports it to the CCS controller 200 (S4). ).

When the CCS control unit 200 reports the total data capacity from the disk control unit 400, the CCS control unit 200 provides a disk mirror copy command to the disk control unit 400 again (S5). In this case, the total data capacity of the first hard disk 500 reported by the disk controller 400 to the CCS controller 200 may be substantially the total capacity of data to be mirrored.

On the other hand, when the disk controller 400 receives the disk mirror copy command again, the disk controller 400 accesses the first hard disk 500, reads out data stored in the first hard disk 500 by a predetermined amount, and stores the data in the SRAM 300. (S6). Thereafter, the disk controller 400 reads out the data stored in the SRAM 300 and stores the data in the second hard disk 600 (S7). The disk controller 400 calculates the remaining copy data capacity (S8). That is, after copying a part of data contained in the first hard disk 500 to the second hard disk 600, the disk controller 400 calculates the remaining data capacity to be copied.

Preferably, the amount copied to the second hard disk 600 is subtracted from the total data stored in the first hard disk 500. More preferably, each time the data contained in the first hard disk 500 is copied to the second hard disk by a predetermined amount for mirror copying, the predetermined amount may be subtracted from the total copy data capacity.

By this process, when the remaining copy data amount is calculated, it is compared whether the remaining copy data amount is larger than the preset amount copied once (S9). If the remaining copy data amount is larger than the preset amount, the disc controller 400 repeats the above-described processes S6, S7, and S8. When the above process is repeated, most of the data contained in the first hard disk 500 will be copied to the second hard disk 600, and the remaining copy data amount is smaller than the preset amount which is copied once in step S9. Will be the same.

If the amount of remaining copy data of the first hard disk 500 is less than or equal to the preset amount of one copy, the disk controller 400 reads out the data contained in the first hard disk 500 by a predetermined amount, and thus, the SRAM 300. After the data is stored in S10, data stored in the SRAM 300 is read and stored in the second hard disk 600 (S11). Thereafter, the disk controller 400 reports to the CCS controller 200 that the disk mirror copy is completed (S12), and when the disk mirror copy is completed, the disk controller 400 notifies the system console 100 of this (S13). This allows the operator to recognize that the disk mirror copy is complete.

According to the above-described embodiment of the present invention, instead of the conventional DRAM loaded with the operation program or the data data, the CCS acting as a main CPU for controlling the entire CCS block by using the SRAM as a memory for exclusive use of the disk mirror. It can be seen that the control is accessed only at the beginning and end of the disk mirror copy. Accordingly, the present invention relatively reduces the operation of the main CPU that controls the entire CCS block in the disk mirror copy, thereby sufficiently performing services for other operating programs during the time when the main CPU does not participate in the disk mirror copy operation. It is possible to improve service.

In addition, according to an embodiment of the present invention, data read from the active hard disk is stored in the SRAM via the disk controller, and then copied directly to the standby hard disk via the disk controller. Therefore, the present invention has the effect of reducing the disk mirror copy time.

Claims (7)

In an electronic switching system, the latest among the first and second hard disks, which are configured in a CCS block equipped with the operation and maintenance, network management, test and measurement, billing statistics, and input / output device control functions, is redundant. A disk mirror copying apparatus for mirror copying data of a first hard disk containing data to a second hard disk: Disk mirror copy-only memory; When a disk mirror copy command is input, reading data of the first hard disk, storing the data in the disk mirror copy dedicated memory, and copying the data stored in the disk mirror copy dedicated memory to the second hard disk By repeating a plurality of times, the amount of data read once from the first hard disk is limited to a predetermined amount, and when the entire data of the first hard disk is copied to the second hard disk, the result is reported. A disk controller 400; Acting as the main CPU to control the entire CCS block, and transmits the disk mirror copy command from the operator to the disk control unit 400, if the disk control unit 400 is reported that the disk mirror copy is completed, this CCS control unit 200 to deliver to the operator; And a system console (100) in charge of the interface function between the CCS control unit (200) and the operator. The disk mirror copying apparatus of claim 1, wherein the disk mirror copy dedicated memory is formed of SRAM. The disk mirror copying device of claim 1, wherein the first hard disk is in an active state. 4. The disk control unit 400 according to claim 1, 2 or 3, wherein: Each time the data stored in the first hard disk is copied to the second hard disk by the preset amount, the remaining copy data amount remaining on the first hard disk is checked, and the remaining copy data amount is larger than the preset amount. Less than or equal to, after copying the remaining copy data to the second hard disk, reporting to the CCS controller that the disk mirror copy is completed. 5. The disk control unit of claim 4, wherein the disc controller 400: Each time the data stored in the first hard disk is copied to the second hard disk by a predetermined amount, the disk mirror copying apparatus checks the remaining copy data amount by subtracting the total copy data by the predetermined amount. . In the electronic switching system, a disk controller for controlling the first and second hard disks, the first and second hard disks, which are mounted in a CCS block, and the main CPU for controlling the entire CCS block. A disk mirror copying apparatus having a CCS control unit serving as an interface, a system console performing an interface function between the CCS control unit and an operator, and a disk mirror copy-only memory, in which the latest data is stored on the first hard disk; In the disk mirror copy method used: If an operator provides a disk mirror copy command to the CCS control unit using the system console, the CCS control unit forwards the disk mirror copy command to the disk control unit; In response to the disk mirror copy command, the disk controller reads the data of the first hard disk, stores the data in the disk mirror copy dedicated memory, and then stores the data stored in the disk mirror copy dedicated memory in the second hard disk. A second step of repeating the copying process for a plurality of times and limiting the amount of data read once from the first hard disk to a preset amount; A third step of checking, by the disk controller, the amount of remaining copy data remaining on the first hard disk each time the data recorded on the first hard disk is copied to the second hard disk by the predetermined amount; A fourth step of, if the remaining copy data amount is less than or equal to the preset amount, copying the remaining copy data to the second hard disk, and then reporting the completion of the disk mirror copy to the CCS control unit; And a fifth step of the CCS control unit notifying an operator of the result through the system console when receiving the report that the disk mirror copy is completed. 7. The method of claim 6, wherein the remaining copy data amount of the third step is: Each time the data recorded on the first hard disk is copied to the second hard disk by a preset amount, the disk mirror copy method checks the remaining copy data amount by subtracting the total copy data amount by the preset amount. .