JPH10190778A - Sampling system for communication error log - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the analysis of a communication error and to improve maintenance by preserving the communication error log of an initial stage when a large quantity of communication errors is produced in the sampling system of the communication error log. SOLUTION: The sampling system is provided with a communication error log file 14 which cyclically stores the communication error log, a means for judging whether overwriting is executed on a former communication error log 15 while referring to the overwriting propriety condition 11 of a communication error log control table, in writing the produced communication error log 16 into the communication log file 14 and a means for generating the new communication error log file and judging whether it can be stored or not when overwriting cannot be executed while referring to a new communication error log file generation condition 12 preserved in the communication error log control table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication error collecting method, and more particularly to a communication error log collecting method when a large number of communication errors occur.

[0002]

2. Description of the Related Art Conventionally, a communication control apparatus logs communication errors of a communication line in order to facilitate error analysis when a communication error occurs. The file for logging this communication error is usually used cyclically in consideration of effective use of computer resources.

[0003] In addition, a communication error often causes a large number of errors after the first error. For this reason, when writing is continued up to the last record of the communication error log file and further returned to the first record and continued to be written, the initial communication error log may be overwritten and deleted. As a result, the most important initial error log could not be confirmed, and error analysis was difficult.

[0004] In order to avoid this, in a conventional method, when a communication error occurs, logging of the communication error is stopped so that necessary information is not erased. However, in this method, logging of communication errors of other lines is stopped, and communication error analysis of the line that triggered the stop of logging can be performed.However, inconveniences such as insufficient analysis of communication errors of other lines cannot be performed. Occurs.

There is also a method in which a communication error log file is divided for each line so that a communication error log of a target line is not erased by logging a communication error of another line. However, this method has a disadvantage that the number of records in a communication error log file that can log a communication error per line is limited.

[0006] Further, since the log file is not a flexible method for newly expanding the log file as needed, a problem remains in terms of effective use of computer resources such as a memory.

[0007] Such a conventional example is disclosed in Japanese Unexamined Patent Publication No. Hei.
Japanese Patent No. 49943 discloses a "communication line tracing method", in which a memory for cyclically storing trace data obtained by tracing a control state of a communication line and a condition for overwriting when data is stored are referred to to determine whether or not overwriting is possible. There is disclosed a system provided with means for performing the following.

[0008]

The first problem is that, in the prior art, there is a possibility that an initial error log is overwritten and disappears, and if overwritten, error analysis becomes difficult. is there.

The reason is that one communication error log file is used cyclically, and the old communication error log is overwritten without any control.

[0010] The second problem is that the memory area of the communication error log file is not minimized and is not effectively used.

The reason is that, since the memory area of the communication error log file is conventionally fixed, the required minimum memory area is made variable, and a new file is not created as needed. It is difficult to use it effectively.

(Object of the Invention) An object of the present invention is to save an initial communication error log when a large number of communication errors occur, thereby facilitating the analysis of communication errors and improving maintainability. .

[0013]

According to the present invention, there is provided, as a means for solving the above-mentioned problems, means for logging a communication error of a communication line, and a communication error log file for cyclically storing the communication error log. And conditions for allowing or not overwriting old data in the communication error log file,
When writing a communication error log control table holding the conditions for creating a new communication error log file and a newly generated communication error log to the communication log file, whether to overwrite the old communication error log at the write position. No, the overwriting permission / non-permission determining means for determining by referring to the overwriting permission / prohibition condition, and when the overwriting cannot be performed, referring to the new communication error log file creation condition held in the communication error log control table. Means for determining whether a new communication error log file can be created, and means for storing, when the new communication error log file is created, the newly generated communication error log in the file. And a communication error log collecting method.

Further, the communication error log control table of the present invention includes a preset time (T) indicating overwriting permission / inhibition conditions, and the number of communication error log files that can be created without affecting the system. And the maximum number of communication error log files created (M) indicating the number of communication error log files created by the communication control device up to the present, and the number of communication error log files currently created (m) indicating the number of communication error log files created so far. The availability determining means firstly determines a communication error occurrence time of a communication error log to be written,
The difference (t) from the error occurrence time of the old communication error log written at the writing position of the currently used communication error log file is determined, and the time held in the overwrite permission condition of the communication error log control table is further determined. A difference (Tt) from (T) is determined, and if this (Tt) is negative, it is determined that overwriting is possible, and if it is positive or 0, it is determined that overwriting is not possible. The difference (M) between the maximum number (M) of communication error log files created in the control table and the current number (m) of communication error log files created.
−m), and if (M−m) is positive, creation is possible, negative or 0
Then, it is determined that creation is impossible, and if creation is possible, a new communication error log file is created, and the current number of created communication error log files is counted up, and the communication error log collection method is characterized in that But also.

Further, the present invention provides a medium characterized by recording a program for executing the above method as the above means.

Further, the means of the present invention will be described in detail with reference to the drawings.

According to the communication error log collection method of the present invention, the communication error log control table (10 in FIG. 1) determines whether the old communication error log already written at the write position of the communication error log file can be overwritten. Means for judging using the overwrite permission condition (11 in FIG. 1) and the conditions for creating the communication error log file (12 and 13 in FIG. 1) held in the communication error log control table (10 in FIG. 1)
And a communication error log file control unit (20 in FIG. 2) having means for making a determination by using the command.

A communication error log control table (FIG. 1)
In 10), the time (T) is included in the overwrite permission condition (11 in FIG. 1), and the maximum number of communication error log files (12 in FIG. 1) is set to a level that does not affect the system. The number of error log files created (M) is
Number of communication error log files currently created (13 in Fig. 1)
Holds the number (m) of communication error log files created by the communication control device up to the present.

The overwriting permission / non-permission determining means first determines the communication error occurrence time (16a in FIG. 1) of the communication error log (16 in FIG. 1) to be written and the communication error log file (FIG. 1 in FIG. 1) currently in use. The difference (t) from the error occurrence time (15a in FIG. 1) of the old communication error log (15 in FIG. 1) written at the writing position of 14) is obtained.

Next, the difference (T−T) from the time (T) held in the overwrite permission condition of the communication error log control table is described.
Find t). If (Tt) is negative, it is determined that overwriting is possible, and if it is positive or 0, it is determined that overwriting is not possible.

The means for determining the creation of a communication error log file includes the maximum number M of communication error log files created (12 in FIG. 1) in the communication error log control table (10 in FIG. 1) and the current number of created communication error log files. m (1 in FIG. 1)
The difference (M−m) from 3) is obtained, and if it is positive, it is determined that it can be created, and if it is negative or 0, it is determined that it cannot be created. If the communication error log file can be created, the current number m of communication error log files created (13 in FIG. 1) is counted up.

[Operation] In a communication error, a large number of errors often occur after the first error. The log file is usually used cyclically in consideration of effective use of computer resources. For this reason, in the conventional method, when writing is performed up to the last record of the error log file, and further returning to the first record and continuing to write, the initial communication error log may be overwritten. For this reason, the most important initial error log could not be confirmed, and error analysis was difficult.

According to the present invention, the time of a record (log) to be overwritten in an error log file is checked, and if a certain time or more has not elapsed, the record is not written and a new record is not written. By creating an error log file at the beginning, it is possible to avoid erasure of important initial error logs by overwriting.

That is, according to the present invention, when the difference between the time of the error log to be written and the time of the error log being written is separated by a certain interval T or more, the writing (overwriting) is continued and the certain time T or more is continued. If not, create a new error log file and continue writing.

Therefore, the initial communication error log can be confirmed on the communication error log file, and the communication error analysis can be easily performed.

Further, an initial communication error log of a large number of communication errors generated in a short time can be confirmed.

[0027]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

[Structure] FIG. 1 is a diagram for explaining the principle of the present invention, and is a schematic diagram mainly showing a data structure.
FIG. 2 is a schematic diagram showing a schematic configuration of the present embodiment.

The communication control unit 21 shown in FIG. 2 controls the line, and if any communication error occurs on the line under control, creates a communication error log and creates a communication error log file control unit. A request for writing a communication error log is made to the communication device 20.

The communication error log stores a communication error occurrence time and communication error information as shown at 16 in FIG.

The communication error log file control unit 20 receives the request for writing the communication error log, and determines from the communication error log control table 22 whether or not the newly generated communication error log can be overwritten with the old communication error log. The determination method is as follows.

First, the communication error occurrence time (16a in FIG. 1) of the communication error log to be written (16 in FIG. 1) and the communication error log file currently in use (FIG. 1)
The error occurrence time (15 in FIG. 1) of the old communication error log (15 in FIG. 1) written in the write position of (14)
The difference (t) from a) is obtained. Next, the difference (Tt) from the time held in the overwrite permission condition of the communication error log control table is obtained. If (Tt) is negative, it is determined that overwriting is possible, and if it is positive or 0, it is determined that overwriting is not possible.

When overwriting is permitted, the old communication error log is overwritten as it is.

If overwriting is not possible, it is determined whether a new communication error log file can be created. The determination method is as follows.

Communication error log control table (1 in FIG. 1)
0) The maximum number M of communication error log files created (12 in FIG. 1) and the current number m of communication error log files created
The difference (M−m) from (13 in FIG. 1) is determined. If it is positive, it is determined that creation is possible, and if it is negative or 0, creation is impossible.

If it can be created, a new file is created, and the current number m of communication error log files created (1 in FIG. 1).
3) Count up.

When a new communication error log file can be created, the file name of the currently used communication error log file is changed, and a new communication error log file is created.
Write the communication error log from the first record of the file.

When it is impossible to create a new communication error log file, the old communication error log can be overwritten as it is.

[Operation] Next, the operation of the embodiment of the present invention will be described with reference to FIG.

FIG. 3 is an operation flow of the communication error log file control unit (20 in FIG. 2).

Step 1: The communication error occurrence time (T1) of the communication error log to be written is read.

Step 2: Read the communication error occurrence time (T2) in the old communication error log at the write position.

Step 3: The difference (t) between the time (T1) read in step 1 and the time (T2) read in step 2 is determined.

Step 4: Overwrite permission / inhibition condition (T) in communication error log control table (10 in FIG. 1) (11 in FIG. 1)
And the result (t) of step 3 are compared.

If the overwrite permission condition (T) is smaller,
It is determined that overwriting is possible, and step 10 is performed. If the overwrite permission condition (T) is larger or equal, it is determined that overwrite is not possible and step 5 is performed. Step 5: Communication error log control table (1 in FIG. 1)
The maximum number of communication error log files (M) (12) shown in FIG. 1) is compared with the current number of communication error log files created (m) (13 in FIG. 1).

If the maximum number of communication error log files (M) is larger, step 6 is performed.

If the maximum number of communication error log files (M) is smaller or equal, step 10 is performed. (However, in order to leave the old communication error log, writing is stopped and a message or the like is output. Is also good.).

Step 6: The current number of communication error log files created in the communication error log control table (10 in FIG. 1) is incremented by one.

Step 7: Change the file name of the currently used communication error log file. Create a new communication error log file and write the communication error log to the first record.

Step 8: Create a new communication error log file.

Step 9: Write a communication error log in the first record.

Step 10: Overwrite the old communication error log.

[0053]

Next, an embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram showing specific data used in the present invention. In FIG. 4, reference numeral 40 denotes an example of a communication error log control table. Reference numeral 41 denotes a state in which the communication error log has been written up to the last record. The time of the communication error log to be written and the time of the old communication error log are compared, and until the overwriting is possible, that is, (n-1)
The state where the record has been written is 42. Reference numeral 44 denotes a file in which a new communication error log file is created and written in the first record.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIGS.

Referring to 40 in FIG. 4, the overwrite permission condition of the communication error log control table is set to 300 seconds, the maximum number of communication error log files created is 4, and the current number created is 1.

Further, since the communication error log file is used cyclically, when the writing to the last record is completed, the writing returns to the first record and starts writing (41 in FIG. 4).

Up to the (n-1) th record, the old communication error log was determined to be overwritable and was written.
Since the difference between the communication error log occurrence time of the communication error log 43 to be written next and the time of the old communication error log at the next writing position (the nth record) is 62 seconds,
Since this difference and the overwriting permission / prohibition condition of 40 in FIG. 4 are 300 seconds, it is determined that overwriting is not possible (step 4 in FIG. 3).

Accordingly, the process proceeds to step 5 in FIG. 3, and a determination is made to create a new communication error log file. From 40 in FIG. 4, it is determined that a new communication error log file can be created by comparing the maximum number of communication error log files created and the current number of created communication error log files, and the newly created communication error log file (46 in FIG. 4) is determined. Write the communication error log to the first record of the parentheses.

If a limit of two or three is set for the number of error log files that can be newly created, if error log files are created up to the limit, even if a fixed interval T
Even if they are not apart from each other, a method may be used in which the last created error log file is used cyclically.

The present invention is also a medium such as a floppy disk storing a program for executing the above-described method of the present invention. With this medium, the above-described problems can be solved and the effects of the present invention can be obtained. That is clear.

[0061]

The first effect is that the initial communication error log can be confirmed on the communication error log file, and the communication error analysis becomes easy.

The reason is that the occurrence time of the communication error log to be overwritten is compared with the occurrence time of the communication error in the communication error log to be written, and a predetermined elapsed time set in advance in the overwriting permission condition elapses. If not,
This is because the old error log is left without being overwritten, so that an initial communication error log of a large number of communication errors generated in a short time can be confirmed.

A second effect is that unnecessary consumption of computer resources such as a memory can be suppressed.

The reason is that, according to the present invention, a log file is newly created as needed, so that only a minimum necessary memory area is used. Also, since error log files with important initial error logs are not overwritten, error log analysis is easy by checking the oldest error log file that is no longer used or the next oldest error log file. Will be able to do it.

[Brief description of the drawings]

FIG. 1 is a data configuration diagram for explaining the principle of the present invention.

FIG. 2 is a schematic diagram showing a configuration example of an embodiment of the present invention.

FIG. 3 is an operation flowchart of the communication error log file control unit according to the present invention;

FIG. 4 is a diagram showing an example of specific data of the embodiment.

[Explanation of symbols]

10, 22, 40 Communication error log control table 11 Overwrite permission / prohibition condition T 12 Maximum number of communication error log files created M 13 Current number of communication error log files created 14, 23 Communication error log file currently in use 15 Next write position 15a Communication error occurrence time of old communication error log 16 Communication error log to be written 16a New communication error occurrence time 20 Communication error log file control unit 21 Communication control unit 41 Example of writing to last record of log file 42 Old communication of log file Example of writing error log until overwriting possible 44 Example of creating new communication error log file 45 Communication error log file with changed file name because old communication error log cannot be overwritten 46 Newly created communication error log file

Claims (3)

[Claims] Means for logging a communication error of a communication line; a communication error log file for cyclically storing the communication error log; a condition for overwriting the communication error log file with old data; A communication error log control table holding conditions for creating the communication error log file, and whether to overwrite an old communication error log at the writing position when writing a newly generated communication error log to the communication log file. Overwriting permission / non-permission determining means for determining by referring to the overwriting permission / prohibition condition, and when the overwriting cannot be performed, referring to the new communication error log file creation condition held in the communication error log control table, New file creation determining means for determining whether a communication error log file of the new communication can be created; If the error log file is created, collected method of communication error log, characterized in that it comprises means for storing a communication error log that the newly generated in the file, the. 2. The communication error log control table according to claim 1, wherein the communication error log control table has a preset time (T) indicating an overwrite permission condition and a communication error log file indicating the number of communication error log files that can be created without affecting the system. The maximum number of log files created (M) and the current number of created communication error log files (m) indicating the number of communication error log files created by the communication control device up to the present time. First, the difference (t) between the communication error occurrence time of the communication error log to be written and the error occurrence time of the old communication error log written at the writing position of the currently used communication error log file is calculated. And a difference (T) from the time (T) held in the overwrite permission condition of the communication error log control table.
−t), and if this (T−t) is negative, it is determined that overwriting is possible, and if it is positive or 0, it is determined that overwriting is not possible. The new file creation determining means determines the communication error log file in the communication error log control table. The difference (Mm) between the maximum number of created (M) and the current number of created communication error log files (m) is determined. If (Mm) is positive, creation is possible, and if negative or 0, creation is impossible. 2. The communication error log collection method according to claim 1, further comprising: creating a new communication error log file and counting up the current number of created communication error log files if the communication error log file can be created. . 3. A medium on which a program for executing the method according to claim 1 or 2 is recorded.