Network distribution information management system

• US 5,854,895 A
• Filed: 04/07/1995
• Issued: 12/29/1998
• Est. Priority Date: 07/06/1994
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Nishina, Toshihide, Makimoto, Haruo, Okazaki, Yasuhiro, Kanayama, Hidehiko
• Primary Examiner(s): Lall, Parshotam S.
• Assistant Examiner(s): Winder, Patrice L.
• Application Number:
  US08/418,678
• Time in Patent Office: 1,362 Days
• Field of Search: 395/200.01, 395/200.18, 395/200.03, 395/200.07, 395/600, 395/200.3, 395/200.31, 395/200.42, 395/200.76, 395/200.51, 395/200.53, 707/1, 707/8, 707/201
• US Class Current: 709/221
• CPC Class Codes: G06F 16/27 Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
• CPC Class Codes: G06F 16/275 Synchronous replication

Abstract

A communication system which includes a plurality of information processing units connected to a network. Each information processing unit includes a database for storing information. A duplicate of the information is distributed to each of the other information processing units. Moreover, each information processing unit modifies the information in its database, extracts a differential of the information before modification and the information after modification, and transfers the differential to each of the other information processing units.

Claims

1. A distribution information management system of a first information processing unit of first and second information processing units connected to a network, said distribution information management system comprising:

a database for storing information, a duplicate of the information being distributed to the second information processing unit;

modification processing means for modifying the information in the database;

modification content management means for storing the contents of the information modification at the time of the information modification;

differential extraction means for extracting a differential between the information before modification and the information after modification, said differential extraction means referencing the modification content management means during the extraction of the differential and extracting as the differential a part of the information that has been modified; and

duplicate transfer processing means for transmitting the differential extracted by the differential extraction means to the second information processing unit, wherein

a plurality of information units are connected to the network,

the information in the database is distributed from the first information processing unit to each of the other information processing units connected to the network and the information that is distributed is definition information necessary for communication over the network, and

the information is distributed from the first information processing unit to the other information processing units based on a hierarchical positional relationship of said other information processing units and in accordance with the proximity along the network of each of said other information processing units to the first information processing unit.

2. A distribution information management system as defined in claim 1, further comprising:

identification symbol provision means for providing information identification symbols indicating the age of the differential transmitted to the second information processing unit, wherein

the differential extraction means includes a destination information management means for managing the information identification symbols and,

when information has been modified, said differential extraction means compares new information identification symbols indicating the modified information with old information identification symbols indicating the duplicate information of the second information processing unit managed by the destination information management means, and extracts a differential between the information corresponding to the old information identification symbols and the information corresponding to the new information identification symbols, said differential extraction means extracting as the differential a part that has been changed by referencing the modification content management means.

3. A distribution information management system as defined in claim 1, further comprising:

identification symbol provision means for providing information identification symbols indicating the age of the differential transmitted to the second information processing unit, wherein

the differential extraction means includes a destination information management means for managing the information identification symbols and,

after information has been modified, said differential extraction means compares new information identification symbols indicating the modified information with old information identification symbols indicating the duplicate information of the second information processing unit managed by the destination information management means, and extracts a differential between the information corresponding to the old information identification symbols and the information corresponding to the new information identification symbols.

4. A distribution information management system as defined in claim 3, wherein the differential extraction means includes

a resource information entry having a location of the information in the database, the information identification symbols, and a name of the information;

and

a distribution resource list provided for each of the information identification symbols, the distribution resource list having under its control one or a plurality of resource information entries, when a resource information entry having a symbol newer than the information identification symbol is present, said distribution resource list is prepared for the latest modified information identification symbols in these resource information entries; and

the differential extraction means retrieves the resource information entry under the control of the distribution resource list corresponding to the information identification symbol of the differential information to be transmitted, and extracts the modified information managed by the resource information entry.

5. A distribution information management system as defined in claim 4, wherein the differential extraction means has a resource information set that controls the one or a plurality of resource information entries so that the transmitted edition number of the distribution resource list is not exceeded, and wherein the retrieval of the modified information is executed for the resource information entries from the distribution resource list via the resource information set.

6. A distribution information management system as defined in claim 4, wherein the distribution resource list of the differential extraction means is placed in a queue in edition number order.

7. A distribution information management system as defined in claim 4, further comprising a differential extraction environment expansion processing means, when information has been modified, for creating an age identification symbol for the new information and for incorporating the age identification symbol as a resource information entry in a resource information set.

8. A distribution information management system as defined in claim 1, further comprising a differential extraction environment construction means for constructing the differential extraction means for performing differential extraction.

9. A distribution information management system as defined in claim 1, wherein a plurality of information processing units are connected to the network and the distribution information management system further comprising:

a differential extraction environment updating processing means for removing from the differential extraction means the extraction environment of the differential of the modified information corresponding to the information identification symbol that is made superfluous as a result of the transmission of differential information from the first information processing unit to other information processing units on the network.

10. A distribution information management system as defined in claim 9, wherein said differential extraction environment updating processing means deletes from the differential extraction means the distribution resource list for the modified information corresponding to the information identification symbol that is made superfluous as a result of the transmission of differential information from the first information processing unit to other information processing units of the network.

11. A distribution information management system as defined in claim 1, further comprising an operations control means for prompting a replacement of the differential between old and new information for at least one of the information processing units, other than the first information processing unit, at the time of a start-up of the first information processing unit.

12. A distribution information management system as defined in claim 11, wherein the operations control means prompts the replacement of the differential between the old and new information for the second information processing unit upon receiving a request from the second information processing unit.

13. A distribution information management system as defined in claim 1, further comprising a duplicate relay processing means for relaying the differential information received from the second information processing unit to the database.

14. A distribution information management system as defined in claim 1, further comprising:

a definition master for connecting and storing a classification of a respective information processing unit that is a target of definition, a unit name, and the definition information in said database,

wherein said distribution information management system divides said classification by a hierarchical level related to the hierarchical positional relationship and the proximity along the network of the respective information processing unit to the first information processing unit,

retrieves definition information for each hierarchical level from the definition master and

transmits the retrieved definition information from the first information processing unit to the second information processing unit.

15. A distribution information management system as defined in claim 1, wherein the first information processing unit includes a partitioned transmission processor that partitions the definition information that is to be transmitted, taking into account a receiving volume of the second information processing unit, and then transmits the definition information.

16. A distribution information management system as defined in claim 1, wherein the first information processing unit includes a partitioned application processor for partitioning the definition information that has been received and then applying the definition information.

17. A distribution information management system as defined in claim 1, wherein the information that is to be distributed is the definition information required for communication over the network, the distribution information management system further comprising:

information coupling means, in the relay of the definition information through its distribution to the partner information processing units that are the target of communication, for coupling the modified definition information created by the modification processing means and the relay prompt information that prompts the relay of the definition information; and

duplicate transfer processing means for transmitting the coupled modified definition information and the relay priority level information to the partner information processing unit.

18. A distribution information management system as defined in claim 17, further comprising relay priority level decision means for deciding a priority level for the relay of the modified definition information to each of the partner information processing units, and if the priority level is included in said relay prompt information, said information coupling means couples and transmits the relay prompt information and the modified definition information.

19. A distribution information management system as defined in claim 17, further comprising:

information separation means for separating the coupled information received into modified definition information and relay prompt information; and

relay execution means for relaying the modified definition information according to the relay prompt information.

20. A distribution information management system as defined in claim 19, further comprising:

relay condition decision means, when the relay priority level is different for a partner information processing unit, for evaluating and deciding the relay priority level of the definition information at the partner information processing unit and the host information processing unit, and deciding the relay conditions by selecting either the relay priority level of the host information processing unit or the relay priority level of the partner information processing unit.

21. A distribution information management system in which a plurality of information processing units are connected to a network, the plurality of information processing units including a first information processing unit and a plurality of partner information processing units of the first information processing unit, the distribution information management system comprising:

means for distributing definition information required for communication among the information processing units to the information processing units connected to the network;

means for relaying the definition information to the information processing units; and

means for transmitting definition information from the first information processing unit to the partner information processing units based on a hierarchical positional relationship of the partner information processing units and in accordance with the proximity along the network of each partner information processing unit to the first information processing unit.

22. A distribution information management system as defined in claim 21, further comprising:

a definition master for connecting and storing a classification of a respective information processing unit that is a target of definition, a unit name, and the definition information,

wherein said distribution information management system

divides said classification by a hierarchial level related to the hierarchical positional relationship and the proximity along the network of the respective information processing unit to the first information processing unit,

retrieves the definition information for each level from the definition master, and

transmits the retrieved definition information from the first information processing unit to the other information processing units.

23. A distribution information management system as defined in claim 21, wherein the first information processing unit includes a partitioned transmission processor that partitions the definition information that is to be transmitted, taking into account the volume received by the second information processing unit, and then transmits the definition information.

24. A distribution information management system as defined in claim 21, wherein the information processing unit includes a partitioned application processor for partitioning the definition information received and then applying the definition information.

25. A distribution information management system in which a plurality of information processing units are connected to a network, comprising:

means for distributing and relaying definition information required for communication among information processing units that include a first information processing unit and communication partners;

modification processing means for modifying the definition information;

information coupling means for coupling relay prompt information that prompts relay of the modified information and the modified definition information created by the modification processing means; and

duplicate transfer processing means for transmitting the coupled modified definition information and relay prompt information to the information processing units that are communication partners, based on a hierarchical positional relationship of said information processing units that are communication partners, and in accordance with a proximity, along the network, of each of said information processing units that are communication partners to the first information processing unit.

26. A distribution information management system as defined in claim 25, wherein each of the information processing units that are communication partners includes relay priority level decision means for deciding a priority level for the relay of the modified definition information, and wherein the priority level decided by the relay priority level decision means is included in said relay prompt information, and the relay prompt information is coupled with the modified definition information by said information coupling means and then transmitted.

27. A distribution information management system as defined in claim 26, further comprising:

relay condition decision means, when the relay priority level is different for a host information processing unit than a communication partner information processing unit of the host information processing unit, for evaluating and deciding the relay priority level of the definition information at the communication partner information processing unit and the host information processing unit, and deciding the relay conditions by selecting either the relay priority level of the host information processing unit or the relay priority level of the communication partner information processing unit.

28. A distribution information management system as defined in claim 25, further comprising:

information separation means for separating the coupled information received into modified definition information and relay prompt information; and

relay execution means for relaying the modified definition information according to the relay prompt information.

29. A distribution information management system of a first information processing unit of first and second information processing units connected to a network, said distribution information management system comprising:

a database for storing information, a duplicate of the information being distributed to the second information processing unit;

modification processing means for modifying the information in the database;

modification content management means for storing the contents of the information modification at the time of the information modification;

differential extraction means for extracting a differential between the information before modification and the information after modification said differential extraction means referencing the modification content management means during the extraction of the differential and extracting as the differential a part of the information that has been modified;

duplicate transfer processing means for transmitting the differential extracted by the differential extraction means to the second information processing unit;

a verification processor for verifying information transferred from the second information processing unit;

a recording processor for recording information found to be error-free as a result of the verification; and

a management list including a name of the definition information, a state of recording of the definition information, and a name of other definition information related to the definition information, wherein,

in a sequential verification and recording of a plurality of received information, said verification processor verifying subsequent information at the same time as previous information is recorded, and

the information is definition information required for communication among the first and second information processing units, and said verification processor receives the definition information and an operation classification, and executes a uniformity check on the definition information names, and a mutual relationship check of the definition information to the other definition information, and wherein

said recording processor writes the name of the definition information recorded from results of the uniformity check and the mutual relationship check, the operation classification, the recorded configuration of the definition information, and the names of the other, related definition information to the management list, and records the management list in a database.

30. A distribution information management system as defined in claim 29, wherein when there is an error, notice of the error is immediately given.

31. A distribution information management system as defined in claim 29, wherein when the definition information of a plurality of systems is processed collectively and an error is found, an error is noted only for the definition information of a system in which the error occurred, and the system is notified of the error.

32. A communication system comprising:

a network; and

a plurality of information processing units connected to the network, each information processing unit including a database for storing information, a duplicate of the information being distributed to each of the other information processing units, wherein each respective information processing unit

modifies the information in its database,

extracts a differential of the information before modification and the information after modification, and

transfers the differential to each of the other information processing units in accordance with a hierarchical positional relationship of said other information processing units and a proximity, along the network, of each of said other information processing units to the respective information processing unit wherein the differential is definition information.