RU2457622C2 - Data archiving system and method - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: announcement signal, which identifies data to be archived, is sent from a source system to a destination system. A feedback signal, which identifies the announcement signal received by the destination system, is sent from the destination system to the source system, wherein it is determined from the feedback signal whether the announcement signal has been received by the destination system correctly. If it has been determined that the announcement signal has not been correctly received, at least parts of the announcement signal are resent from the source system to the destination system. The data identified by the announcement signal are sent from the source system to the destination system for archiving.

EFFECT: high reliability of archiving data.

6 cl, 2 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to systems, methods and computer programs for archiving data.

BACKGROUND OF THE INVENTION

It is known that a data archiving system comprises a source system and a recipient system. The data, and in particular the documents that need to be archived, are sent from the source system to the recipient system along with an attribute file that uniquely identifies the data. The recipient system archives the received data, for example, on a write-once storage device (WORM). The attribute file is used as a key that allows you to find data in the recipient system. If an error occurs while transferring the attribute file from the source system to the recipient system, then the attribute file received in the recipient system may be damaged, so that data received from the source system can no longer be found in the recipient system, that is, data in the destination system will be lost.

SUMMARY OF THE INVENTION

The aim of the present invention is to provide a method, system and computer program for archiving data, which provides an increased degree of data integrity.

This goal is achieved by using a method of archiving data in which: a notification message (notification) is transmitted from the source system to the recipient system, identifying the data that should be archived; a feedback message is transmitted from the recipient system to the source system, in which the notification received by the recipient system is identified; the feedback message determines whether the notification was received correctly by the recipient system; at least parts of the notification that were incorrectly received by the recipient system are retransmitted from the source system to the recipient system if it was determined that the notification was received incorrectly; The data identified in the notification is transferred from the source system to the recipient system to archive this data.

Since the feedback determines whether or not the notification was received correctly by the recipient system, and since at least the damaged parts of the notification are retransmitted from the source system to the recipient system, if it was determined that the notification was received incorrectly, the probability of that the notification will be incorrectly received by the recipient system. The notification is preferably used as a key that uniquely identifies data in the recipient system, namely, the notification is used to locate data in the recipient system. Therefore, since the likelihood of a damaged notification is reduced, the likelihood of data loss due to key corruption is reduced, and the degree of data integrity is increased.

According to a preferred embodiment of the invention, at least parts of the notification that were not received correctly by the recipient system are retransmitted from the source system to the recipient system until the notification is correctly received by the recipient system.

Since at least portions of the notification are retransmitted until the notification is correctly received by the recipient system, the likelihood of a damaged notification being received by the recipient system is further reduced, resulting in an additional increase in data integrity.

In accordance with another embodiment of the invention, after archiving the data in the recipient system, a confirmation message is transmitted from it to the source system identifying the data recorded in the archive in the recipient system, at least some of the data that was incorrectly received by the recipient system are retransmitted from the source system to the destination system. Thus, the integrity of the data in the recipient system is further enhanced.

According to a preferred embodiment of the invention, at least parts of the data that were not received correctly by the recipient system are retransmitted from the source system to the recipient system until the data is correctly received by the recipient system. Thus, the integrity of the data in the recipient system is further enhanced.

Also, in a preferred embodiment, the same data is archived on a write-once storage device. Since the data is recorded on such a storage device only once, they can be stored for a long time without the risk of damage.

In one preferred embodiment of the invention, the same data is archived on several write-once storage devices. Thus, if the data recorded in the archive on one storage device with write-once are damaged, they can be read from another storage device, and, accordingly, the degree of data integrity is increased. In one embodiment of the invention, a confirmation message is transmitted to the source system after it is confirmed that the data is correctly recorded in the archive on multiple write-once storage devices. In this case, the degree of data integrity is also increased.

The above objectives are also achieved using a data archiving system in which the inventive method is implemented and which comprises:

source system for providing data to be archived;

a recipient system for archiving data;

the first transmission means for transmitting a notification identifying data to be archived and for retransmitting at least parts of the notification that were not received correctly by the recipient system from the source system to the recipient system, if it was determined that the notification was not taken correctly;

second transmission means for transmitting a feedback message in which the notification is identified from the recipient system to the source system;

decision-making means, which determines from the feedback message whether the notification was received correctly or not by the recipient system;

third transmission means for transmitting the data identified in the notification from the source system to the recipient system.

In a preferred embodiment, the data archiving system enables one or more of the aforementioned preferred steps or variations of the data archiving method of the invention to be performed.

The above objectives are also achieved using a source system that provides data that must be archived, and the source system contains:

the first transmission means for transmitting a notification identifying data to be archived and for retransmitting at least parts of the notification that were not received correctly by the recipient system from the source system to the recipient system, if it was determined that the notification was not taken correctly;

decision-making means for determining by the feedback message that was transmitted from the second transmission means for transmitting the feedback message from the recipient system to the source system, the notification was received correctly or not by the recipient system;

third transmission means for transmitting data identified by the notification from the source system to the recipient system.

In a preferred embodiment, the source system providing the data is intended to perform one or more of the above preferred steps or variations of the inventive method for archiving data.

The above objectives are also achieved using the recipient system, providing data archiving, containing a second transmission means for transmitting a feedback message that identifies the notification identifying the data to be archived from the recipient system to the source system.

In a preferred embodiment, the recipient system is designed to perform one or more of the above preferred steps or variations of the inventive method for archiving data.

The above objectives are also achieved using a computer program for archiving data, carrying out the stages proposed in the invention method, when the computer program is executed by a computer, and the computer program contains:

a first software code tool for providing data to be archived in the source system;

a second software code tool for archiving data in the recipient system;

a third program code tool for transmitting a notification identifying data to be archived and for retransmitting at least parts of the notification that were not received correctly by the recipient system from the source system to the recipient system, if it was determined that the notice was not correctly received;

fourth software code means for transmitting a feedback message in which a notification is identified from the recipient system to the source system;

the fifth means of program codes, designed to determine the feedback message, correctly or not, the notification was received by the recipient system;

a sixth program code tool for transmitting data identified by the notification from the source system to the recipient system.

In a preferred embodiment, the computer program is designed to perform one or more of the above preferred steps or variations of the inventive method for archiving data.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described below with reference to the drawings, which show:

figure 1 is a block diagram of a data archiving system in accordance with the invention;

figure 2 is a block diagram of a method of archiving data in accordance with the invention.

DETAILED DESCRIPTION OF THE INVENTION

The figure 1 shows a block diagram of a data archiving system. The system contains the creating system 2, the source system 3, and the receiving system 4. The creating system 2 creates data, for example documents, such as documents in WORD format. The creating system 2 comprises transmission means 5 for transmitting data created in the creating system 2 to the source system 3. The source system 3 comprises receiving means 6 for receiving data. The source system 3 generates a notification in accordance with the data received from the creating system 2 by the receiving means 6. The notification preferably contains an attribute file, which may contain the name of the data file and other attributes that uniquely identify the corresponding data. For example, if the data file contains a document that is a drawing of the structure to be manufactured, for example, an aircraft, the attribute file may contain the type of aircraft, the identification number of the material indicated in the drawing, etc.

The source system 3 also contains transmission means 7 (first transmission means) for transmitting a notification from the source system 3 to the receiving system 4. Thus, the attribute file is preferably transmitted from the source system 3 to the receiving system 4. The notification is received by means of receiving 8 of the recipient system 4. After the means of transmission 7 transmits a notification to the recipient system 4, it transmits to the recipient system 4 a message about the end of the transmission. The message about the end of the transmission is received by the receiving means 8, which serves as an indication that the transmission of the notification from the source system 3 to the destination system 4 is completed. The notification is imported into the database 9 of the recipient system 4. The recipient system 4 generates a feedback message containing information identifying the notification received by the receiving means 8 of the recipient system 4. The recipient system 4 also contains transmission means 10 (second transmission means), intended for transmitting a feedback message from the recipient system 4 to the source system 3. The feedback message is received by the receiving means 11 of the source system 3.

The source system 3 also comprises decision means 12 for determining the identity of the notification identified by the feedback message to the notification generated by the source system 3. For example, the feedback message may comprise a notification received by the receiving means 8 of the recipient system 4. Thus, comparing a feedback message with a notification generated by the source system 3, it can be easily determined whether the notification has been correctly received by the recipient system 4.

The source system 3 also contains transmission means 14 (third transmission means) for transmitting data to be archived from the source system 3 to the receiving system 4. The transmitted data is received in the receiving system 4 by the receiving means 15. Data is transmitted by transmission means 14 to reception means 15 along with the notification. The recipient system 4 compares the notification transmitted by the transmission means 7 to the reception means 8 with the notification that was transmitted along with the data from the transmission means 14 to the reception means 15. If these two notifications are different, then another means 16 for transmitting the recipient system 4 transmits a confirmation message to the source system 3. The source system 3 includes another receiving means 17 for receiving a confirmation message. In this case, the confirmation message contains information that indicates an error that occurred during data transmission and / or notification from the transmission means 14 to the reception means 15. In this case, the source system 3 should provide retransmission of data and / or notifications to the recipient system 4.

The data archiving system 1 also comprises means 18 for generating a signature for the data. If the data is documents, then for each document the signature is determined by the signature generation tool 18. The signature generating means 18 may be a computer system generating a hash code, for example a checksum of data, in particular documents, using a hash program and generating encrypted hash codes using an encryption program. An encrypted hash code is, for example, a signature. The invention is not limited to such encrypted hash code generation. Other known means and methods for generating data signatures may also be used. The signature generating means 18 exchanges information with the recipient system 4 using the message transmitting and receiving means 21.

The data archiving system 1 also comprises at least two write-once (WORM) devices 19, 20 in which the archived data is stored. The devices 19, 20 exchange information with the recipient system 4 by means of transmitting and receiving messages 22 and 23, respectively.

Below will be described in more detail one of the variants of the method of archiving data in accordance with the invention with reference to the flowchart shown in figure 2.

At stage 101, the creating system 2 creates data, which in the present embodiment are documents.

At step 102, these documents are transmitted by means 5 for transmitting the creating system 2 to means 6 for receiving the source system 3.

At step 103, a notification is generated that uniquely identifies the documents to be archived. This notification is transmitted from the source system 3 to the recipient system 4 at step 104.

At step 105, a feedback message is generated generated by the recipient system 4, which uniquely identifies the notification received by the receiving means 8. In particular, the feedback message may contain a copy of the notification received by the reception means 8. In step 106, a feedback message is transmitted from the recipient system 4 to the source system 3, and in step 107, the source system 3 compares the notification generated by the source system 3 in step 103 with the notification of the feedback message received by the system receiving means 11 3. If these notifications differ, then all the notification generated by the source system 3, or parts of this notification that were not correctly received by the receiving device 8 of the recipient system 4, are retransmitted from the source system 3 to the floor system ents 4, i.e. in this case in the present method, step 104 is performed, and retransmission is carried out preferably only incorrectly received parts. If the notification generated by the source system 3 and the notification in the feedback message are identical, then the source system 3 no longer sends notifications to the recipient system 4, and after the recipient system waits for another notification for a certain amount of time, the process continues to the stage 108. Alternatively, the transmission means 7 may transmit a message to the reception means 8, indicating that the notification generated by the source system 3 and the notification in the feedback message are identical, and YSTEM recipient 4 performs step 108 after receiving this message receiving means 8.

At step 108, the means 14 for transmitting the source system 3 transmits the documents to be archived, together with the notification to the recipient system 4. The notification in this embodiment of the method contains an attribute file that contains the names of the document files and other attributes that uniquely identify documents that must be archived.

If a message, such as a notification or feedback message, or data is transmitted, then a transmission end message is also transmitted, which indicates the completion of the transmission.

At step 109, a signature is generated for each document, and at step 110, the documents are archived in storage devices 19, 20 together with the signatures. At step 111, it is determined whether or not documents are correctly recorded on each of the storage devices 19, 20. This can, for example, be done if the signature is an encrypted hash code by decrypting the signature that was recorded on the devices 19, 20 together with the corresponding documents, and hashing the corresponding document. By hashing the corresponding documents, a first hash code is obtained, and as a result of the decryption of the signature, a second hash code is obtained. If the first and second hash codes match, then the corresponding document is correctly recorded on the WORM storage device. If each document is correctly recorded on each WORM device, the method continues to step 112. If the document on the WORM device is not recorded correctly, step 110 is repeated only for this document and for the WORM device on which this document is not recorded correctly.

At step 112, the recipient system 4 generates a confirmation message containing information indicating documents that are correctly recorded in the archive, and documents that are recorded incorrectly. The confirmation message preferably contains a confirmation file in which for each document it is indicated whether the document was archived correctly or incorrectly.

This confirmation message is transmitted at step 113 by means 16 of the transmission of the recipient system 4 to means 17 of the reception of the source system 3.

The means 24 for making a decision of the source system 3 determines by a confirmation message whether all documents transferred to the recipient system 4 are recorded in the archive correctly. Further, if some documents were not recorded in the archive correctly, then the decision making means 24 determines which documents were recorded incorrectly. In this variant of the method, the confirmation message is a confirmation file, in each line of which the attributes of the attributes file identify the document that was indicated in the notification. In addition, each line of the file contains information indicating whether the document of this line is written to the archive correctly or not. Thus, by reading the confirmation message, namely, the confirmation file in the considered variant of the method, the decision making means 24 can easily determine whether the corresponding document is written to the archive correctly. If the document is not recorded in the archive correctly, then step 108 of the method is performed, in which only those documents that were incorrectly recorded in the archive are transferred from the source system 3 to the destination system 4. If all documents were recorded in the archive correctly, the execution of the method stops at step 115.

The data archiving system 1 is controlled by a computer program that performs the steps of the method in accordance with the present invention.

The invention is not limited to a data archiving system that includes a creating system. A data archiving system in accordance with the invention may also comprise only a source system and a receiver system.

Claims (6)

1. A method of archiving data, comprising the steps of:
transmitting a notification identifying the data to be archived from the source system (3) to the recipient system (4);
transmitting a feedback message identifying the notification received by the recipient system (4) from the recipient system (4) to the source system (3);
determination by feedback message whether the notification was received correctly or not by the recipient system (4);
retransmission of at least parts of the notification that were incorrectly received by the recipient system (4) from the source system (3) to the recipient system (4) if it was determined that the notification was received incorrectly until the notification will not be correctly accepted by the recipient system (4);
transferring the data identified in the notification from the source system (3) together with the notification to the recipient system (4) to archive this data; and after the data has been archived in the recipient system (4), the transmission from the source system (3) to the recipient system (4) of a confirmation message that identifies the data archived in the recipient system (4) indicating whether the data archived correctly; moreover, at least parts of the data that were not received correctly by the recipient system (4) are re-sent from the source system (3) to the recipient system (4) until the data is correctly received by the recipient system ( four). 2. The method of archiving data according to claim 1, in which the data is archived on a write-once storage device (19, 20). 3. The method of archiving data according to claim 2, in which the same data is archived on several write-once storage devices (19, 20). 4. The method of archiving data according to claim 1 and claim 3, in which a confirmation message is transmitted to the source system (3) after it is confirmed that the data are correctly recorded in the archive on several write-once storage devices (19, 20) . 5. The method of archiving data according to claim 1, in which time stamps are introduced into the data composition. 6. A data archiving system in which the method according to claim 1 is carried out and which comprises:
source system (3) designed to provide data that must be archived;
the first transmission means (7) for transmitting the notification from the source system (3) to the recipient system (4) identifying the data to be archived and for retransmission of at least parts of the notification that were not received correctly by the system -receiver (4) for archiving data, if it was determined that the notification was not received correctly until the notification was correctly received by the receiving system (4);
decision making means (12) determining, by feedback, transmitted from the second transmission means (10) for transmitting the feedback message from the recipient system (4) to the source system (3), the notification was received correctly or not by the recipient system (four);
the third transmission medium (14), designed to transmit data identified by the notification, together with the notification from the source system (3) to the recipient system (4), and at least parts of the data that were not correctly received by the recipient system (4 ) are retransmitted from the source system (3) to the receiver system (4) until the data is correctly received by the receiver system (4); and
the recipient system (4) intended for archiving data, which contains:
first reception means (8) for receiving a notification identifying data to be archived;
second transmission means (10) for transmitting from the recipient system (4) to the source system (3) a feedback message that identifies a notification identifying data to be archived;
third reception means (15) for receiving data identified by the notification together with the notification; and
additional transmission medium for transmission from the source system (3) to the receiver system (4), after the data has been archived in the receiver system (4), confirming messages from the source system (3) to the receiver system (4) that identifies the data archived in the destination system (4), indicating whether the data was archived correctly.

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