JPH0512088A - Continuity guaranteeing system of journal data - Google Patents

Abstract

PURPOSE:To guarantee the continuity of journal data in a system to preserve the prepared data as journal data. CONSTITUTION:A line change-over switch 1, when an operation system collating processing part 2 is normal, sends the data added through a line L to the operation system collating processing part 2, and at the time of the trouble, sends them to a waiting system collating processing part 3. The operation system collating processing part 2 and the waiting system collating processing part 3 add a serial number to the added data, and output it to an operation system file processing part 6 and a waiting system file processing part 7. The operation system file processing part 6 and the waiting system file processing part 7 output the data to add the added serial number to an operation type journal file 8 and a waiting system journal file 9. The operation system file processing part 6 outputs the journal data accumulated in the operation type journal file 8 and the waiting system journal file 9 to a magnetic tape 10 at the time of the preserving processing of the journal data so that the serial number can be continuous.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a journal data continuity guarantee system for guaranteeing the continuity of journal data.

[0002]

2. Description of the Related Art Conventionally, data and the like added from a terminal via a communication line have been saved as journal data. At that time, it has been conventionally practiced to duplicate the system in order to improve reliability.

FIG. 6 is a block diagram of a conventional example of this type, which includes a line changeover switch 61, an operating system collation processing unit 62 having a time addition unit 64, and a standby system collation processing unit 63 having a time addition unit 65. It is composed of an active file processing unit 66, a standby file processing unit 67, an active journal file 68, a standby journal file 69, and a magnetic tape 70.

The line changeover switch 61 sends the data added from the terminal via the line L to the operating system collation processing unit 62 when the operating system collation processing unit 62 is normal, and the standby system collation processing unit when it is not normal. Add to 63.

When data is added through the line changeover switch 61, the operation system collation processing unit 62 uses the time addition unit 64 to add the time at that time to the data. And
If the working file processing unit 66 is normal, the time-added data is sent to the working file processing unit 66, and if it is not working, the time-added data is sent to the standby file processing unit 67.

When data is added via the line changeover switch 61, the standby system collation processing unit 63 uses the time addition unit 65 to add the time at that time to the data. And
If the working file processing unit 66 is normal, the time-added data is sent to the working file processing unit 66, and if it is not working, the time-added data is sent to the standby file processing unit 67.

The active file processing unit 66 outputs the data with the time added from the active collation processing unit 62 or the standby system collation processing unit 63 to the active journal file 68 as journal data. Further, the active file processing unit 66 performs a journal data saving process at the start of system operation, for example. In this journal data storage processing, the active file processing unit 66 outputs the journal data accumulated in the active journal file 68 to the magnetic tape 70 if the standby journal file 69 does not have journal data accumulated. , When journal data is accumulated in the standby system journal file 69 (when a failure occurs in the active system file processing unit 66 and the active system file processing unit 66 is switched to the standby system file processing unit 67) Merges the journal data accumulated in the active journal file 68 and the journal data accumulated in the standby journal file 69 with the time added to them as a key, and the merged result is recorded on the magnetic tape 70. Output.

The standby system file processing unit 67 outputs the data with the time added from the active system verification processing unit 62 or the standby system verification processing unit 63 to the standby system journal file 69 as journal data. When the standby file processing unit 67 does not operate normally at the timing of the journal data saving process, the standby file processing unit 67 replaces the active file processing unit 66 and saves the same journal data as described above. Perform processing.

[0009]

As described above, conventionally, when the system is all normal, the operation system collation processing unit 6 is used.
2 and the active file processing unit 66 are used to store the journal data only in the active journal file 68, a failure occurs in the active file processing unit 66, and the active journal file 68 changes to the standby journal file 69. There is a possibility that the journal data may be missing when switching to, and furthermore, since only the time is added to the journal data, even if there is a missing, there is a problem that it cannot be detected.

Further, in the above-mentioned conventional example, when a failure occurs in the active system collation processing unit 62 and switching to the standby system collation processing unit 63 is performed, the active system collation processing unit 62 and the standby system collation processing unit 62. There is a possibility that the time given to the data may be shifted due to the time difference managed by 63. For this reason,
If a failure occurs in the active file processing section 66 after the failure in the active collation processing section 62 and a switch is made to the standby file processing section 67, it is added to the data in the saving process. Since the merging process is performed using the specified time as a key, there is a problem that the continuity of the journal data is not guaranteed.

Further, in the above-mentioned conventional example, when a failure occurs in the active file processing unit 66 and the journal data is accumulated in the standby journal file 69, the active journal file 68 and the standby journal file 69 are read. Since it is necessary to perform the merge process using the time added to the data as a key, there is a problem that the journal data saving process takes time.

An object of the present invention is to guarantee the continuity of journal data and to speed up the journal data saving process.

[0013]

According to the present invention, in order to ensure the continuity of journal data, (a) an active system collation processing unit, a standby system collation processing unit, an operational system file processing unit, and a standby system In a system including an active file processing unit, an active journal file, and a standby journal file, the active collation processing unit adds a serial number to the generated data, and the active file processing unit and the standby When the standby collation processing unit fails, the standby collation processing unit appends a serial number to the generated data in place of the active collation processing unit. Data with serial numbers is sent to the active file processing unit and the standby file processing unit, and the active file processing unit and the standby file processing unit The serial number-added data sent from the operating system collation processing unit or the standby system collation processing unit is output to the operating system journal file and the standby system journal file, respectively, and the operating system file processing unit or the The standby-system file processing unit outputs the journal data accumulated in the active-system journal file and the standby-system journal file to the storage unit so that the serial numbers are continuous when the journal data is stored. Further, according to the present invention, in order to speed up the journal data saving process, (b) the active system file processing unit or the standby system file processing unit is accumulated in one of the journal files during the journal data saving process. The journal data is sequentially output to the storage means while checking for missing serial numbers, and by detecting missing serial numbers, the other journal file is searched and the leading serial number of the missing serial numbers is added. The journal data is searched for, and the journal data is sequentially output to the storage means while checking for missing serial numbers in order from the found journal data.

[0014]

In the configuration (a), the active collation processing unit adds a serial number to the generated data and sends it to the active file processing unit and the standby file processing unit. Further, when a failure occurs in the active system collation processing unit, the standby system collation processing unit performs similar processing.

When the data to which the serial number is added is added to the active file processing unit and the standby file processing unit, the data is accumulated in the active journal file and the standby journal file.

Further, the active file processing unit or the standby file processing unit magnetically records the journal data accumulated in the active journal file and the standby journal file so that the serial numbers are consecutive when the journal data is stored. Output to storage means such as tape.

Further, in the configuration of (b), the active file processing unit or the standby file processing unit is accumulated in one journal file (for example, the active journal file) during the journal data saving process. The stored journal data is output to the storage means while checking for missing serial numbers.

When a missing serial number is detected, the other journal file (standby system journal file) is searched to find the journal data to which the leading serial number of the missing serial numbers is added, The journal data is output to the storage unit while sequentially checking for missing serial numbers from the found journal data.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which a line changeover switch 1, an operational system collation processing unit 2 having a serial number addition unit 4, and a standby system collation processing unit 3 having a serial number addition unit 5 are shown. , The active file processing unit 6, the standby file processing unit 7, the active journal file 8,
A standby journal file 9 and a magnetic tape 10 are provided.

The line changeover switch 1 sends the data added from the terminal via the line L to the working system collation processing unit 2 when the working system collation processing unit 2 is normal, and the standby system collation processing unit when it is not normal. Output to 3.

The operation system collation processing unit 2 is the line changeover switch 1
When the data is added from, the serial number adding unit 4 is used to add a serial number to the data. If both the active file processing unit 6 and the standby file processing unit 7 are normal, both are processed. If only the active file processing unit 6 is normal, only the active file processing unit 6 is processed by the standby file processing. When only the section 7 is normal, the data with the serial number is sent only to the standby file processing section 7.

The standby system collation processing unit 3 is a line changeover switch 1
When the data is added from, the serial number is added to the data by using the serial number adding unit 5. If both the active file processing unit 6 and the standby file processing unit 7 are normal, both are processed. If only the active file processing unit 6 is normal, only the active file processing unit 6 is processed by the standby file processing. When only the section 7 is normal, the data with the serial number is sent only to the standby file processing section 7.

The active file processing unit 6 accumulates the data with the serial number added from the active collation processing unit 2 or the standby collation processing unit 3 in the active journal file 8 as journal data. When a failure occurs in the active system collation processing unit 2, the active system file processing unit 6 sends the serial number to be added to the next data to the standby system collation processing unit 3.

Further, the active file processing unit 6 performs a journal data saving process at the start of system operation, for example.

In the journal data storage process, the active file processing unit 6 operates the active journal file 8,
The journal data accumulated at the head of the standby journal file 9 is taken out, and the serial numbers added to both are compared. If they are the same or if the serial number added to the journal data in the active journal file 8 is smaller, the journals stored in the active journal file 8 are checked while confirming that there is no omission in the serial number. The data is output to the magnetic tape 10 in order from the beginning. When a missing serial number is detected, a binary search is performed on the standby journal file 9 to accumulate the journal data to which the leading serial number of the missing serial numbers is added in the standby journal file 9. It is determined whether or not it has been done.

When it is judged that the journal data to which the leading serial number of the missing serial numbers is added exists in the standby journal file 9, the standby journal file is checked while confirming that there is no missing serial number. The journal data accumulated in 9 are output to the magnetic tape 10 in the order of serial numbers from the above journal data. If it is determined that the journal data to which the leading serial number of the missing serial numbers is added does not exist in the standby journal file 9, the missing serial number is output to the magnetic tape 10 and then the active journal file is output. The unoutputted journal data accumulated in 8 are output to the magnetic tape 10 while confirming that there is no omission in order from the smallest serial number.

If a missing serial number is detected while the journal data accumulated in the standby journal file 9 is being output to the magnetic tape 10, the journal data in the active journal file 8 is output. The same processing as when a missing serial number is detected during the operation.

The standby system file processing unit 7 stores the data with the serial number added from the active system verification processing unit 2 or the standby system verification processing unit 3 in the standby system journal file 9 as journal data. Further, the standby journal file 9 sends the serial number to be added to the next data to the standby collation processing unit 3 when a failure occurs in the active collation processing unit 2. In addition, the standby file processing unit 7 uses the active file processing unit 6 when storing journal data.
If there is a failure in the operation, the active file processing unit 6
On behalf of the journal data storage process.

FIG. 2 is a diagram for explaining the operation when the system is normal,
FIG. 3 is an operation explanatory diagram when a failure occurs in the active file processing unit 6, and FIG. 4 is an operation explanatory diagram when a failure occurs in the active system collation processing unit 2. The operation of the embodiment will be described.

First, the operation when the system is normal will be described with reference to FIG.

When data is added from a terminal via the line L, the line changeover switch 1 operates the data by the operating system collation processing unit 2
Output to.

The operation system collation processing unit 2 is the line changeover switch 1
When the data is added from, the serial number is added to the data by using the serial number adding unit 4, and the data with the serial number is output to the active file processing unit 6 and the standby file processing unit 7.

When the data to which the serial number is added is added from the operation system collation processing unit 2, the operation system file processing unit 6 and the standby system file processing unit 7 are added to the corresponding operation system journal file 8 and standby system journal file 9, respectively. The data to which the serial number is added is stored as journal data.

Then, when it comes time to save the journal data, the active file processing unit 6 sequentially outputs the journal data accumulated in the active journal file 8 to the magnetic tape 10.

Next, the operation when a failure occurs in the active file processing unit 6 will be described with reference to FIG.

When data is added from the terminal via the line L, the line changeover switch 1 outputs the above data to the operation system collation processing unit 2.

The operation system collation processing unit 2 is the line changeover switch 1
When the data is added from, the serial number is added to the data by using the serial number adding unit 4. After that, the active collation processing unit 2 outputs the data to which the serial number is added to the standby system file processing unit 7 because the active system file processing unit 6 has a failure.

When the file to which the serial number is added is added to the standby file processing unit 7 from the operation collation processing unit 2,
It is stored in the standby journal file 9. As described above, when a failure occurs in the active file processing unit 6, the data with the serial number is sent only to the standby file processing unit 7, and therefore, the missing journal data occurs in the active journal file 8. However, there is no loss of journal data in the standby journal file 9.

After that, when it comes time to save the journal data, the standby file processing unit 7 replaces the active file processing unit 6 with the journal data of the journal data because a failure has occurred in the active file processing unit 6. Save the data. When the active file processing unit 6 is restored, the normal operation shown in FIG. 2 is performed again.

Next, the operation when a failure occurs in the active system collation processing unit 2 will be described with reference to FIG.

When a failure occurs in the operating system collation processing unit 2,
The line changeover switch 1 outputs the data added from the terminal via the line L to the standby system collation processing unit 3, and the operating system file processing unit 6 and the standby system file processing unit 7 wait for the serial number to be added to the next data. The system collation processing unit 3 is notified.

The standby system collation processing unit 3 is the line changeover switch 1
When the data is added from the serial number adding section 5, the serial number adding section 5 is caused to perform a serial number adding process with the serial number added from the active file processing section 6 and the standby file processing section 7 as an initial value. After that, the standby system collation processing unit 3 outputs the data with the serial number added to the operating system file processing unit 6 and the standby system file processing unit 7.

The active file processing unit 6 and the standby file processing unit 7 respectively use the serial number-added data sent from the standby verification unit 3 as journal data for the active journal file 8 and the standby journal file 9. Accumulate in.

After that, when it comes time to save the journal data, since the active file processing unit 6 is normal, the active file processing unit 6 performs the journal data saving process. When the operating system collation processing unit 2 is restored, the normal operation shown in FIG. 2 is performed again.

FIG. 5 is a diagram showing an example of the contents of the active journal file 8 and the standby journal file 9.
In this example, from the time the journal data with the serial number “100” is output to the active journal file 8 until the time the journal data with the serial number “150” is output to the active journal file 8
A failure occurred in the active file processing unit 6, and the serial number "2
A failure occurs in the standby system file processing unit 7 from the time when the journal data to which "00" is added is output to the standby system file 9 until the time when the journal data to which the serial number "300" is added is output to the standby system file 9. This is about the case when occurs.

When the contents of the active journal file 8 and the standby journal file 9 are as shown in FIG. 5,
Assuming that the active file processing unit 6 saves the journal data, the following process is performed.

The active file processing unit 6 first takes out the journal data accumulated at the head of the active journal file 8 and the standby journal file 9, and compares the serial numbers added to both. In the case of this example, since the serial numbers are both “1”, the active file processing unit 6 confirms that there is no omission in the serial numbers, and sequentially checks the journal data accumulated in the active journal file 8 from the beginning. Output to tape 10. When the journal data to which the serial number “150” is added is read and a missing serial number is detected, the active file processing unit 6 performs a binary search for the standby journal file 9 and the serial number at the beginning of the missing serial number. The journal data to which the serial number (101 in this example) is added is the standby journal file 9
To determine whether or not it has been accumulated in.

In the example of FIG. 5, the standby journal file 9
Since the journal data to which the serial number “101” is added can be found by performing a binary search of, the active file processing unit 6 confirms that there is no missing serial number, and the journal data accumulated in the standby journal file 9 is confirmed. Are sequentially output to the magnetic tape 10 from the journal data of serial number "101". After that, when a missing serial number is detected by reading the journal data to which the serial number “300” is added, the active file processing unit 6 performs a binary search for the active journal file 8 and finds the missing serial number. It is determined whether or not the journal data to which the first serial number (serial number “201” in this example) is added is accumulated in the active journal file 8.

In this example, since the journal data to which the serial number "201" is added is found by performing a binary search of the active journal file 8, the active file processing unit 6 operates while confirming that there is no omission in the serial number. The journal data accumulated in the system journal file 8 is sequentially output to the magnetic tape 10 from the journal data of the serial number “201”. Then, by outputting the journal data to which the serial number “500” is added to the magnetic tape 10, the storage processing of the journal data by the active file processing unit 6 ends.

[0051]

As described above, according to the present invention, a serial number is added to the generated data and accumulated in the active journal file and the standby journal file, and in the journal data saving process, Since the journal data accumulated in the standby journal file is output to the storage means so that the serial numbers are consecutive, it is possible to ensure the continuity of the journal data.

Further, according to the present invention, when the journal data is stored, the journal data accumulated in one of the journal files is output to the storage means while checking for missing serial numbers, and when missing serial numbers is detected. ,
Since the journal data accumulated in the other journal file is output to the storage means in sequence while checking for missing serial numbers, it is possible to read all the journal data of both the active and standby journal files. There is an effect that the processing speed of the journal data saving process can be improved as compared with the conventional example in which the merging process according to the comparison result must be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram during normal operation.

FIG. 3 is an operation explanatory diagram when a failure occurs in an active file processing unit.

FIG. 4 is an operation explanatory diagram when a failure occurs in the active system collation processing unit.

FIG. 5 is a diagram showing an example of contents of an active journal file and a standby journal file.

FIG. 6 is a block diagram of a conventional example.

[Explanation of symbols]

1,61 ... Line changeover switch 2, 62 ... Operational collation processing unit 3, 63 ... Standby system collation processing unit 4, 5 ... Serial number addition section 6, 66 ... Operational file processing unit 7, 67 ... Standby system file processing unit 8,68 ... Operational journal file 9,69 ... Standby journal file 10, 70 ... Magnetic tape 64, 65 ... Time addition section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiro Kuroko             2-17-11 Takanawa, Minato-ku, Tokyo NEC Corporation             Software Co., Ltd. (72) Inventor Katsumi Suzuki             2-17-11 Takanawa, Minato-ku, Tokyo NEC Corporation             Software Co., Ltd.

Claims (3)

[Claims] 1. A system including an active system collation processing unit, a standby system collation processing unit, an active system file processing unit, a standby system file processing unit, an active system journal file, and a standby system journal file. The operating system collation processing unit adds a serial number to the generated data, and sends the serial number added data to the operating system file processing unit and the standby system file processing unit. When the system collation processing unit fails, a serial number is added to the data generated in place of the active system collation processing unit, and the serial file added data is sent to the operating system file processing unit and the standby system file processing unit, The active file processing unit and the standby file processing unit are assigned serial numbers sent from the active system collation processing unit or the standby system collation processing unit, respectively. The added data is output to the active journal file and the standby journal file, and the active file processing unit or the standby file processing unit stores the active journal file and the standby system during journal data storage processing. A journal data continuity guarantee method characterized in that the journal data accumulated in a journal file is output to a storage unit so that serial numbers are consecutive. 2. The operating system file processing unit or the standby system file processing unit, when storing journal data,
The journal data accumulated in one journal file is sequentially output to the storage means while checking for missing serial numbers, and by detecting missing serial numbers, the other journal file is searched and the missing serial numbers 2. The journal data to which the leading serial number is added is searched, and the journal data is sequentially output to the storage means while checking for missing serial numbers in order from the found journal data. Journal data continuity guarantee method. 3. The journal data continuity guarantee system according to claim 1, wherein the storage means is a magnetic tape.