JPS5972548A - Logging system of circuit log - Google Patents

Abstract

PURPOSE:To reduce the storage capacity and to attain an effective application of a storage region, by storing an on-line processing program in a user region of a main storage device and at the same time providing a common region to record the logging data of a circuit log together with replacement. CONSTITUTION:A user region 2 is provided together with a basic operating system OS1. The region 2 includes an on-line control program 4, an on-line processing program 5 and a common region 3 for both programs. A logging region 6 is provided at a part of the region 3. The region 6 includes a control block 7 and a data region 8. The logging data are successively logged at and after a head address (a) of the region 8. When the region 8 is filled with the logging data, these data are erased successively with that logged first. Then new data are recorded in place of the erased data. In such a way the storage region and ensures an effectively application of the storage region is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical field of the invention This invention has an online function and has a common area in the main memory (a processing program that is stored in the user area of the main memory and is loaded into the user area). The present invention relates to a logging system for line logs in an information processing device provided with an area in which data can be received and transferred.

(2) Background of the technology In recent information processing systems, systems that construct information networks using a large number of intelligent terminals have become commonplace, and relatively small information processing devices are also required to have online functionality. ing.

Online data transmission includes time-division processing and remote batch processing, and relatively small computers often perform online processing using remote batch processing. In this case, the online processing program and the online management program that manages it are loaded into the user area of the main memory to perform online processing, and the logging data dump described later is dumped into the user area. This is done by loading the program.

When an information processing device is equipped with an online function, the data flowing over the line during online business execution and the operation of the online management program are logged as a line log for investigation and analysis in the event of a failure, debugging of the processing program, etc. Therefore, it becomes necessary to allocate a storage area for recording logging data. Logging of line logs is generally performed by an online management program creating a line log and logging it in an allocated storage area.

(3) Prior Art and Problems In conventional information processing devices, line logs are logged in a specific file or storage area prepared by the system in advance, and usually line logs are logged from the beginning. Everything is recorded until the end. Therefore, files or areas for logging remain fixedly allocated and require a fairly large storage area. However, when a relatively small information processing device is equipped with an online function, securing a file or area for this logging becomes a heavy burden, and an information processing device that performs online processing using batch processing is This logging file or storage area is not used except when it is waiting for processing, which poses an obstacle to the efficient use of resources.

(4) Purpose of the Invention This invention provides that when a line failure occurs, the logging data that is referred to is often only the data of a few items immediately before the failure occurs; Focusing on the fact that it is not necessary to record a large amount of data as long as the purpose is to deal with the problem, line logs can be effectively logged without creating a specific file or fixed storage area. Furthermore, it is an object of the present invention to provide a logging method that facilitates data logging and dumping.

(5) Structure of the Invention The line log logging method of the present invention is based on an information processing apparatus in which an online processing program is loaded into a user area of the main memory during data transmission, and a common area is provided in the user area. A logging method for a line log during transmission, characterized in that a logging area for the line log is set within the common area during data transmission, and the latest logging data is recorded in the logging area while being updated. It is. In other words, by focusing on the fact that generally in the case of line-related failures, only a few pieces of data immediately before the failure occurs are valid, by cyclically recording the logged line logs while constantly updating them with the latest data, a relatively small amount of data can be saved. By using the common area in the user area of the main memory as the logging area for line logs, data can be logged without the need for a specific file or storage area. , updates and dumps can be easily performed.

(6) Examples of the invention Next, further explanation will be given based on the illustrated embodiment.

FIG. 1 shows the contents of the main memory during online processing, where 1 is the basic O5, which is a basic operating system such as SPV and JCPIFCP. 2 is a user area, and a common area 3 is provided in this user area 2. The common area 3 is an area used when data and information are transferred between processing programs loaded into the user area 2. 4 is an online management program, 5 is an online processing program, and the online processing program 5 executes online business with the support of the online management program 4. The online management program 4 and online processing program 5 are programs loaded into the user area 2 by a job command. The online management program 4 is the online processing program 5.
Data is sent and received to and from other stations via the communication line in response to a request from the communication line. At this time, a line log is created based on the data flowing on the line, commands from the processing program 5, operations of the online management program 4, etc. Then, the line log created in the logging ffRM 6 in the common area 3 is logged.

FIG. 2 shows the contents of the logging area 6, which consists of a management block 7 and a data area 8. The first logging data created by the online management program 4 is logged at the start address a of the logging area 6, and subsequent line logs are logged in order from the start address a. When the data area 8 is full, the first logged data, that is, the data recorded at the start address a, is erased in order and the latest data is recorded, and the recorded data is updated to the latest line log. Go.

Figure 2 shows a state in which data is being recorded while being updated.The newest logging data is recorded in the storage area at address 1, and the oldest logging data is recorded in the storage area at address. In the management block 7, there are the first address a of the logging area, the address 1 where the latest line log at the present time is logged, and the address where the oldest line log at the present time is recorded. The number of pieces of logging data currently recorded in the data area 8 is stored. The online management program 4 records the line log while updating it to the latest one, and also updates the contents of the management block 7.

In this way, the latest logging data is recorded in the logging area 6 in a number that matches the storage capacity of the data area 8. It should be noted that the empty space space that occurs in the data area in FIG. 2 appears as the difference between the number of bytes of logging data to be erased and the number of bytes of logging data to be updated.

When a failure such as a line error occurs during online business execution, the online processing program 5 stops running, and the logging data in the data area 8 stops with a predetermined number of line logs recorded immediately before the failure occurred. . Therefore, as shown in FIG. 3, if you load the logging dump program 9 into the user area 2, extract the line log from the common area 3, and dump it to the printing device 10, you can investigate the line log immediately before the failure occurred. This makes it possible to deal with line failures.

If the online business is completed without any line failure, the line log will remain in the common area 3, but the line log will remain in the common area 3, but the line log will remain in the common area 3.
When the Chiron program uses the common area 3, the logging data is erased, and the area allocated as the logging area 6 can also be used as a normal common area. Therefore, by providing the logging area 6 in the common area 3, The storage capacity of the common area 3 is not restricted. Furthermore, since the common area 3 is an area that can be easily operated by application programs, by logging line logs in the common area 3,
The writing, reading, and updating procedures are simplified.

(7) As described in detail, according to the logging method of the present invention, the logging area for line logs is set in the common area in the user area of the main memory, so a special file for logging or a fixed There is no need to secure a large amount of storage space, and resources can be used effectively. That is, for example, if this logging area is allocated in the basic O5 area of the main memory, that area will be fixedly allocated and the capacity of the user area of the main memory will be reduced. According to this method, the storage area that can be used by other application programs is not reduced, and it is extremely effective in making effective use of resources.

In addition, since the logging area is located in the user area within the main memory, data can be written, updated, and read easily and in a short time.The procedure is also simplified, and when dumping logging data, It is sufficient to load a logging dump program into the user area and read data from the common area, and there is no need to prepare a special macro instruction for dumping line logs.

Furthermore, take a logging area in the common area of the user area,
Since the logging data is updated while being logged on i'1k 17fi, it is possible to constantly record the necessary logging data in a relatively small storage area, and it is possible to use small information processing with small storage capacity. This is particularly effective as a logging method for devices.

[Brief explanation of the drawing]

The figures show an example of the data structure in the main memory in the method of the present invention. Fig. 1 shows the data structure in the main memory during online processing, and Fig. Figure N3, which is a diagram showing the data structure of the logging area taken, is a diagram showing the data structure of the main memory when dumping the line log. In the figure, 1 is the basic 0312 user area, 3 is the common area, 4 is the online management program, and 5 is the online processing program. Agent Patent Attorney Takao Nishi

Claims (1)

[Claims] (1) A logging method for line logs during data transmission of an information processing device in which an online processing program is loaded into a user area of the main memory during data transmission, and a common area is provided in the user area; A logging method for line logs, characterized in that a logging area of the log is set in the common area at the time of data transmission, and the latest logging data is recorded in the logging area while being updated.