JP3218608B2 - Remote maintenance processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote maintenance processor for preventing destruction of system resources due to erroneous transmission and reception of data for remote maintenance in a computer network.

[0002]

2. Description of the Related Art FIG. 2 shows an example of the configuration of a computer network system. A plurality of computers 1, 2, and 3 are connected by a communication network 4 to transfer files and the like by necessary mutual communication, and are related to each other. Information processing is enabled, and each computer can also perform necessary individual information processing.

In such a system, for a system resource such as a file commonly used by a plurality of computers, a certain computer 1 is used as a host and is responsible for maintenance of information of the file, and another computer 2 is used as a server. ,
The operation is often performed such that the file is transferred from the host to the server and updated to the latest information whenever necessary.

In such a case, for example, an operation is performed such that a responsible host is separated for each file, and a computer is a host for a certain file and a server for another file.

In some cases, the hosts are hierarchized. In this case, for example, when a certain file is transferred from the computer 1 of the host to the computer 2 of a plurality of sub-hosts having the file, the sub-hosts are assigned respectively. The file is transferred to the computer 3 of the server that performs the file transfer.

[0006]

In the above system, for example, if a sub-host erroneously transfers a file to a host or a server erroneously transfers a file to a sub-host or a host, the contents of the latest information file are destroyed. there's a possibility that. If such an event occurs, the influence may be applied to the lower-layer computers.

An object of the present invention is to provide a remote maintenance processing apparatus capable of preventing the destruction of system resources due to an erroneous file transfer as described above.

[0008]

FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 1 shows a configuration of a remote maintenance processing device, which is a computer that exchanges data with each other via a communication line 10, and includes a level check unit 11, a data reception unit 12, and a data transmission unit 13.

[0009] The level checking unit 11 is provided with a given local station level value 14.
When receiving the reception level value from the data receiving unit 12, comparing the own station level value 14 and the reception level value, only when the reception level value is not smaller than the own station level value 14, The reception permission is returned to the data receiving unit 12.

[0010] When receiving predetermined data from the communication line 10, the data receiving section 12 extracts the reception level value from the predetermined section of the received data, passes it to the level inspection section 11, and receives the reception permission value from the level inspection section 11. The received data is used as valid data for a predetermined process only when there is the response of

When transmitting predetermined data to the communication line 10, the data transmitting section 13 inserts the own station level value 14 held in the level checking section 11 into a predetermined section of the transmission data and transmits the data. .

[0012]

According to the remote maintenance processing device of the present invention, for example, in the order of the host, the subhost, and the server,
Level values are determined so as to be sequentially reduced, and set as respective own station level values, and the transmission source adds the own station level value to data such as a transfer file and transmits the data.

The receiving side compares and checks the received level value with the own station level value held therein, and checks the received level value.
Only when the bell value is not smaller, the received data is used as valid data, for example, for file maintenance. When the own station level value is larger, the received data is discarded, for example, as invalid data. .

Therefore, for example, even if the server erroneously transfers a file to the host, the host does not use the data, thereby preventing the system resources of the host from being destroyed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The level checking unit 11 shown in FIG.

For example, this level value is assigned to each computer by a computer network administrator in consideration of the operation of the network, and is stored in a magnetic disk storage device or the like as one of system constants to be initially loaded by each computer. Shall be kept.

FIG. 3 is a diagram showing an example of the processing flow of the present invention. In the receiving process, processing step 2 in FIG.
When the data receiving unit 12 receives the data transferred through the communication line 10 at 0, the receiving level value is extracted from the level information part of the received data in a certain format in a processing step 21 and passed to the level checking unit 11.

In a processing step 22, the level checking section 11 compares the local station level value with the reception level value, and if the reception level value is larger or equal to each other, determines in the processing step 23 that the reception data is valid data. The data receiving unit 12 is notified of reception permission.

Then, the data receiving section 12 executes a processing step 24
Then, using the received data, a maintenance process such as a file update is executed. If the reception level value is smaller than the local station level value in the comparison of the processing step 22, the level checker 11 determines that the received data is invalid data in the processing step 25 and notifies the data receiving section 12, In the processing step 26, the receiving unit 12 discards the data without using it, for example, and returns a response indicating that the data is discarded to the data transmission source.

In the transmission process, the data transmission unit 13 prepares transmission data in a predetermined format in a processing step 30 of FIG. 3B, and receives the own station level value 14 from the level check unit 11 in a processing step 31. Then, after being inserted into the level information part of the transmission data, it is transmitted to the communication line 10 in the processing step 32.

Therefore, in the computer receiving the transmission data, the data receiving unit 12 and the level checking unit 11 can check the level value as described above to determine the validity of the received data.

[0022]

As is apparent from the above description, according to the present invention, in the processing of the computer network, destruction of system resources due to erroneous data transmission / reception can be prevented, so that the reliability of the system can be significantly improved. There is an industrial effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of the present invention.

FIG. 2 is a block diagram illustrating a configuration example of a computer network.

FIG. 3 is a flowchart of the process of the present invention.

[Explanation of symbols]

 1, 2, 3 Computer 4 Communication network 10 Communication line 11 Level checker 12 Data receiver 13 Data transmitter 14 Own station level value 20-26, 30-32 Processing steps

Continued on the front page (72) Inventor Mitsuru Isogai 2-1-1-15 Kanocho, Chuo-ku, Kobe City, Hyogo Prefecture Inside Fujitsu Kobe Engineering Co., Ltd. (72) Inventor Takeshi Kobayashi 2-chome Kanocho, Chuo-ku, Kobe City, Hyogo Prefecture 1-115 Fujitsu Kobe Engineering Co., Ltd. (72) Inventor Hiromi Iga 2-1-1 Kano-cho, Chuo-ku, Kobe City, Hyogo Prefecture Fujitsu Kobe Engineering Co., Ltd. (72) Inventor Fumihiko Hirata Hyogo Prefecture Fujitsu Kobe Engineering, Inc. 2-1-1-15 Kano-cho, Chuo-ku, Kobe (72) Inventor Mitsuaki Takaya 2-1-1-15 Kano-cho, Chuo-ku, Kobe, Hyogo Prefecture (Kobe, Japan) 72) Inventor Hiroyuki Abe 2-1-1-15 Kano-cho, Chuo-ku, Kobe City, Hyogo Prefecture Inside Fujitsu Kobe Engineering Co., Ltd. (56) References JP-A-4-20141 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 29/08 H04L 12 / 18 G06F 11/30 G06F 15/00 310

Claims (1)

(57) [Claims] A computer for exchanging data with each other via a communication line (10), comprising a level checking unit (11), a data receiving unit (12), and a data transmitting unit (13), The level checking unit (11) holds a given own station level value (14), and when receiving a reception level value from the data receiving unit (12), the own station level value and the reception level value. Only when the reception level value is not smaller than the own station level value, the data reception unit is replied to the reception permission, and the data reception unit (12)
When receiving predetermined data from the communication line (10), takes out the reception level value from a predetermined portion of the received data, passes it to the level check unit (11), and outputs the received level value from the level check unit (11). Only when the answer of the reception permission is received, the received data is used as valid data for predetermined processing,
(13), when transmitting predetermined data to the communication line (10), inserts the own station level value (14) held in the level check unit (11) into a predetermined part of the transmission data. A remote maintenance processing device configured to transmit the data.