JPH06139208A - Shared data management system - Google Patents

Abstract

(57) [Abstract] [Purpose] In distributed processing such as collaborative work, shared data can be retrieved without exclusive control, and when updating, other operators are notified of the update, and Take the consistency of and use master data efficiently. [Configuration] When the workstation 2 duplicates master data from the master data section 11 of the host machine 1,
The shared data update notifying unit 12 stores in the lock management unit 13 information indicating which master data has been duplicated and which workstation 2 has stored it. At any workstation 2, the replicated data is updated,
When the master data is updated accordingly, the shared data update notification unit 12 retrieves the information stored in the lock management unit and notifies the other workstations 2 storing the update target data of the update.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shared data management system for maintaining consistency of data updates when replicating and distributing master data and performing collaborative work.

[0002]

2. Description of the Related Art When designing using an information processing device on a network, a plurality of operators may share data. Conventionally, when updating such shared data, an exclusive control method is applied in order to obtain data consistency. In this exclusive control method, only the operator who has fetched the shared data in the update mode in advance can update the shared data, and other persons cannot handle this shared data.

[0003]

However, the above-mentioned conventional method is effective in ensuring data consistency, but while one operator is extracting shared data in the update mode, another operator is Has the drawback of not being able to see its data. In general, whether or not to update shared data is often decided after referring to the data. For this reason, in the exclusive control (exclusive lock) method as described above, which is fetched in the update mode in advance, unnecessary locks frequently occur and shared data cannot be used efficiently.

The present invention has been made in view of the above situation, and when the master data is duplicated and the collaborative design work is performed, the shared data is not applied in advance (without exclusive lock) without applying the update mode. It is an object of the present invention to provide a shared data management system which can take out the data and can notify other operators handling the same shared data of the updated contents when the shared data is updated.

[0005]

A shared data management system according to the present invention is a shared data management system in which a host information processing device for storing one or more master data and a plurality of information processing devices are connected on a network. In the management system, when any information processing device in the plurality of information processing devices duplicates and stores the master data of the host information processing device, it is possible to determine which master data is stored in which information processing device. When any information processing device among the plurality of information processing devices described above updates the copy of the master data, which information processing device updates the copy of which master data is detected. Detecting means, the master data detected by the detecting means, and the information detected by the information processing apparatus based on the master data detected by the detecting means. Search means for searching for another information processing apparatus that duplicates the same master data as the master data, and if this searching means detects another information processing apparatus that duplicates the same master data as the master data, this information processing apparatus And notification means for notifying the update of the copy of the master data.

Further, according to the present invention, the storage means stores, in advance, the master data and information indicating the relationship between the master data and the information processing device storing the master data, the first identifiers pre-assigned to the master data, respectively. A second identifier assigned to each of the plurality of information processing devices is used to store the information in a table state, and the searching means stores the first identifier corresponding to the master data detected by the detecting means and the detected information processing. Using a second identifier corresponding to the device,
Another information processing device that duplicates the same master data as the master data is searched from the information stored in the storage means.

Further, a shared data management system according to the present invention is a shared data management system for a computer system in which a master file provided in a host device is shared by a plurality of data processing terminals. A management table that manages the names of the data processing terminals that use the data in association with each other, and the data contents updated by the data processing terminals are reflected from the data processing terminals from the data processing terminals. Means for updating the data in the master file in accordance with the request, a means for detecting the data processing terminal using the data in the master file to be updated by referring to the management table, and the detected data processing Means for notifying the terminal that the data in the master file has been updated. Characterized in that it.

[0008]

The arbitrary information processing device connected on the network duplicates the arbitrary master data from the information processing device storing the original data (master data) and stores it without performing exclusive control. . At this time, the storage unit stores the first identifier pre-assigned to the master data and the second identifier pre-assigned to any information processing device in a table state. The storage means creates and stores such management information as needed.

When the operator of any information processing apparatus updates the master data during the collaborative work, first, the copy of the master data stored in the above information processing apparatus is updated. After this, the master data is updated. When the copy of the master data is updated, the detection unit detects which information processing apparatus has updated the copy of the master data.

The search means uses the first identifier corresponding to the master data detected by the detection means and the second identifier corresponding to the detected information processing device, and uses the information stored in the storage means to obtain the master data. Another information processing device that duplicates the same master data as the data is searched. As a result of the search, when an information processing device that duplicates the same master data as the master data is detected, the notification means
This information processing device is notified of the update of the copy of the master data. As a result, the operator of the information processing apparatus can recognize the occurrence of data update.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the functional configuration of the shared data management system according to the present invention and the network configuration of the shared data management system. The host machine 1 has L
The workstation 2 (2A, 2) on a computer network such as an AN (local area network)
B, 2C) are connected. Such collaborative work on the network is performed by using the master data stored in the host machine 1 as the workstations 2A, 2B, 2
C replicates necessary data (hereinafter, the replicated data is referred to as local data), and each workstation 2
This is done by processing local data in A, 2B and 2C. Further, the data is updated by updating the local data in each of the workstations 2A, 2B and 2C and then updating the master data of the host machine 1.

The host machine 1 has a master data section 11
And manages the master data section 11. The master data unit 11 assigns the master data to each master data (data) as shown in FIG.
Correspondingly stores d). In this embodiment, the master data data is assigned to each of the identification numbers 1, 2, 3, and 4.
1, data2, data3, data4 are stored. Further, the host machine 1 has the shared data update notification unit 1
2 and a lock management unit 13.

The shared data update communication unit 12 determines to which workstation 2 the master data is duplicated by identifying numbers (id) 1, 2, 3, 4 stored in the master data unit 11 and The identification characters (user) A, B, and C attached to the workstation 2 are associated with each other and stored in the lock management unit 13 as management information. Further, the shared data update notification unit 12 is stored in the lock management unit 13 when the copy of the master data is updated in any of the workstations 2A, 2B, and 2C and the master data is updated accordingly. By referring to the management information, the other workstations 2A, 2B, 2C storing the update target data are notified of the update.

The workstations 2A, 2B, 2C are
Each has a local data section 21A, 21B, 21C. The operator of each workstation 2A, 2B, 2C copies necessary data from the master data section 11 of the host machine 1 and stores it as local data in the local data sections 21A, 21B, 21C for processing.

Next, a processing form of the joint work in the embodiment will be described. In the initial state immediately after starting the host machine 1 and the workstations 2A, 2B, 2C, the local data section 2 of the workstations 2A, 2B, 2C is
Local data is not stored in 1A, 21B, and 21C. In the initial state, the master data is only stored in the master data section 11 of the host machine 1.

After this, the workstations 2A, 2B,
2C Each operator has master data data1, data2, da stored in the master data unit 11.
Necessary data is copied from ta3 and data4 and stored in the local data sections 21A, 21B and 21C as local data. Each workstation 2A, 2
The operators B and 2C perform processing based on each local data. It should be noted that each operator can, if necessary, even during the processing of local data, the master data section 11
The data is duplicated, stored as local data in the local data section 21, and processed. When updating the data, the operator first updates the local data stored in the local data unit 21 of the corresponding workstation 2. When local data is updated, in order to reflect the updated contents in the master data,
A master data update request is sent to the host machine 1 via the network. After that, the master data to be updated stored in the master data unit 11 of the host machine 1 is updated.

Next, the operation of the shared data update notifying unit 12 in the above-mentioned processing mode will be described with reference to the flowchart of FIG. The shared data update notification unit 12 detects the creation of the local data as described above (step S1, YE
S), each of the workstations 2A, 2B, 2C has master data data1, data2, data.
The lock management unit 1 in the table state uses the management information as to whether 3 or 4 is stored using the identification number and the identification character.
3 (step S2).

If no local data is created (step S1, NO), or after the management information is created, the shared data update notifying unit 12 updates the local data by any operator of the workstations 2. It is detected whether or not the master data is updated according to (step S3). In step S3, when the update of the master data is not detected, the shared data update notifying unit 12 returns to step S1 again. Step S3
When the update of the master data is detected, the shared data update notifying unit 12 locks the workstation 2 that duplicates and stores the same master data as the master data corresponding to the updated local data. To detect (step S4).

If a copy of the master data corresponding to the updated local data is stored in another workstation 2 (step S5, YES), it is confirmed that the local data has been updated for this workstation 2. Notify (step S6). Then, the process returns to step S1 again. Similarly, if another workstation 2 is not detected in step S5, the process returns to step S1.

Next, a specific example of the above-mentioned operation will be described with reference to FIG. The operators of the workstations 2A, 2B and 2C can select the master data section 11 as shown in FIG.
Necessary data is duplicated and stored as local data in each local data unit 21A, 21B, 21C (step S1, YES). That is, workstation 2A
Is data1 with identification number 1 and data2 with identification number 2
And are stored in the local data section 21A. The workstation 2B stores the data 2 having the identification number 2 and the data 3 having the identification number 3 in the local data part 21B, and the workstation 2C stores the data 3 having the identification number 3 and the data 1 having the identification number 1 in the local data part 21C. To do.

At the same time when the above-mentioned local data is created, the lock management unit 13 of the host machine 1 manages information indicating which master data each local data unit 21A, 21B, 21C stores (6 in this embodiment). Information) is stored in a table state using the identification number and the identification character, as shown in the figure (step S2).

When the operator of the workstation 2A updates the local data of id = 1, the workstation 2A updates the master data of id = 1 to reflect the updated contents in the master data. The update request is sent to the host machine 1. As a result, the master data of id = 1 stored in the master data unit 11 is updated (step S3, YES).
At this time, when the shared data update notifying unit 12 receives the information indicating that the local data of id = 1 has been updated in the workstation 2A, the shared data update notifying unit 12 searches the management information of the lock management unit 13, and when id = 1, user ≠ Information that satisfies the condition A is detected (step S4, step S5, YE
S). That is, except for workstation 2A, id = 1
Detect the workstation that stores the data in the local data section. Thereby, in the embodiment, the workstation 2C is detected.

Thereafter, the shared data update notifying unit 12 sends the id = id to the workstation 2C via the network.
Notify that one local data has been updated in another workstation. As a result, the operator of the workstation 2C determines that the data of id = 1, that is, data.
It can be recognized that 1 has been updated.

Further, in the embodiment, when the local data is updated, the system of notifying the operator of the workstation 2 having the same local data of the update is not limited to the notification of the update. By applying data access control that prohibits subsequent updates, various update controls such as first-come-first-served basis can be realized.

In this embodiment, the master data section 1
In response to the update of the master data stored in No. 1, the workstation 2 using the master data to be updated is notified of the update. However, for example, when the local data is updated in any workstation 2, the update may be notified to a workstation using the same local data as the local data to be updated. It is possible.

[0027]

As described above in detail, according to the present invention,
When the shared data update notification unit creates local data from the master data, it stores management information in advance in the lock management unit, and the local data is updated by any processing device.
In response to this, when the master data is updated, by notifying another processor having the same local data of the update, it is not necessary to perform the exclusive control which has been conventionally applied. As a result, it is possible to coordinate and take data between operators, and the shared data can be used efficiently.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a shared data management system according to an embodiment of the present invention and a configuration of a network including the shared data management system.

FIG. 2 is a flowchart showing an operation of a shared data update notifying unit of the shared data management system according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Host machine, 2A, 2B, 2C ... Workstation, 11 ... Master data part, 12 ... Shared data update notification part, 13 ... Lock management part, 21A, 21B, 21C
… Local data section.

Claims (3)

[Claims] 1. A shared data management system in which a host information processing device storing one or more master data and a plurality of information processing devices are connected to each other on a network. When the information processing apparatus duplicates and stores the master data of the host information processing apparatus, a storage unit that stores information indicating which master data is stored in which information processing apparatus; Among them, any information processing device
When updating the copy of the master data, a detecting unit that detects which information processing apparatus has updated the copy of which master data, and the storage unit based on the master data and the information processing apparatus detected by this detecting unit Retrieval means for retrieving another information processing device that duplicates the same master data as the detected master data from the stored information, and other retrieving information processing device that duplicates the same master data as the above master data is detected by this retrieval means. If done,
A shared data management system comprising: a notification means for notifying the information processing device of the update of the copy of the master data. 2. The storage means stores information indicating a relationship between master data and an information processing device that stores the master data, a first identifier assigned to each master data in advance, and the plurality of information processes in advance. A second identifier assigned to each device is used to store in a table state, and the search means corresponds to the first identifier corresponding to the master data detected by the detection means and the detected information processing device. 2. The shared data management system according to claim 1, wherein another information processing device that duplicates the same master data as the master data is searched from the information stored in the storage means using the second identifier. 3. A shared data management system for a computer system in which a master file provided in a host device is shared by a plurality of data processing terminals, and a data name of the master file and a data processing terminal name using the data. And a means for updating the data in the master file according to a request from each data processing terminal so that the data content updated by each data processing terminal is reflected in the master file. And a means for referring to the management table to detect a data processing terminal that uses the data in the master file to be updated, and the data in the master file is updated in the detected data processing terminal. And a means for notifying that the shared data management system Beam.