JP3006265B2 - Information update synchronization device between hosts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for an inter-host information update synchronizing device for updating a common table storing common information of a plurality of hosts.

[0002]

2. Description of the Related Art Conventionally, an information update synchronization device between hosts has
An inter-host exclusion control information table for determining whether or not a plurality of hosts having a common table including information common to the plurality of hosts can refer to or update the common table on the plurality of host controllers; Thus, a common table having information common to a plurality of hosts is excluded, and reference and update are performed.

[0003]

However, in such a conventional host-to-host information update synchronization device, even when only a table having information common to a plurality of hosts is frequently referred to and the number of updates is small, the host-to-host information update synchronization is not possible. The exclusion control means has to perform exclusion and has a disadvantage of poor access efficiency.

An object of the present invention is to solve the above-mentioned drawbacks, and an object of the present invention is to provide an inter-host information updating / synchronizing apparatus capable of improving access efficiency when referring to a common table having information common to a plurality of hosts. .

[0005]

SUMMARY OF THE INVENTION According to the present invention, a plurality of hosts which are connected via a communication control device and each include a common table for storing common information, and updates the common table based on an exclusive request signal input thereto. Do not do at the same time
In host-to-host information update synchronization device that includes a plurality host controller for exclusive control between the host as the host of the update request side, based on the exclusive request from the update requestor outputs the exclusive request signal, Based on the update request and the update data from the update requester, update is performed by performing in-host exclusive control of the common table of the own host, and when the update is completed, the update data is transmitted to the update receiving side host via the communication control device. Then, the update requester is notified of this update requester, the exclusive control within the host is released by the release requester's release notification, and the update requester is updated to the update requester based on the update completion signal from all hosts on the update accepting side. First access means for notifying completion and releasing the exclusion request, wherein the host on the update receiving side transmits the update data transmitted via the communication control device. Input performed hosts within the exclusive control of the common table of the local host to update, release the host in exclusive control at updating end, characterized in that it comprises a second access means for returning the update completion signal.

Further, according to the present invention, the first access means and the second access means perform in-host exclusive control based on the reference request of the reference requester and refer to the information. Means for notifying the requester and releasing the intra-host exclusive control by the release requester's release notification may be included.

Further, in the present invention, the first access means includes an inter-host exclusion control means for outputting the exclusion request signal based on the exclusion request from the update requester, and an update request from the update requester. Based on the first in-host exclusive control means for inputting and performing intra-host exclusive control of the common table of the own host and releasing the intra-host exclusive control by the release notification from the update requester, based on the update data from the update requester Updates the common table of its own host, outputs this update data at the end of the update, and notifies the update requester of the update completion from the first table update means, and the update data from the first table update means. Transmit to the update reception side host via the communication control device, and based on the update completion signal from all the update reception side hosts, notify the update requester of the update completion. And a first communication means for canceling the exclusive control between the hosts, and the second access means receives the update data from the first communication means via the communication control device and inputs the updated data. A second communication means for returning the update completion signal based on the update end signal, and an update request signal and the update data based on the update data from the second communication means; A table control unit that outputs an internal exclusion release signal and the update end signal, and performs in-host exclusion control of a common table of its own host based on an update request from the table control unit, and executes an in-host exclusion control based on the in-host exclusion release signal. A second intra-host exclusive control unit for releasing the exclusive control, and updating the common table of the own host based on the update data from the table control unit A second table update unit that outputs the update end notification at the end of the update, wherein the first intra-host exclusive control unit and the second host exclusive control unit are each based on a reference request from an update referrer. Means for performing intra-host exclusive control of the common table of the own host, wherein the first access means and the second access means refer to a table which refers to the common table of the own host based on a reference request from the update referrer Means can be included.

Further, according to the present invention, the host on the update request side is activated by the first communication means, and when the update completion signal is not received for a predetermined time or more, the host on the update request side sends a retry request to the first communication means. Retry means to perform
The first communication means may include means for transmitting update data from the first table update means and activating the retry means, and means for retransmitting the update data based on the retry request. it can.

Further, according to the present invention, the host on the update request side includes first serial number storage means activated by the first communication means and providing and storing serial number data of the host itself.
The first communication means is means for activating the first serial number storage means when receiving the update data from the first table updating means, and the host from the first serial number storage means is provided to the update data. Means for adding and transmitting serial number data, the update receiving side host includes second serial number storage means for storing serial number data from the second communication means, and the second communication means Means for giving the serial number data added to the update data received from the first communication means to the second serial number storage means, and an update end signal from the table control means to the update end signal from the second serial number storage means. Means for replying by adding serial number data, wherein the first communication means includes serial number data added to an update end signal from the second communication means and serial number data from the first serial number storage means. Compare with By the matching results can include means for notifying the communication completion to the update requestor.

[0010]

The update requesting host outputs an exclusion request signal to the plurality of host control devices based on the exclusion request from the update requester by the first access means, and based on the update request and the update data from the update requester. Updates by performing intra-host exclusive control of the common table of the own host, transmits the update data to the update accepting host via the communication control device when the update is completed, notifies the update requester of the update completion, and The exclusive control in the host is released by the release notification of the update requester, and the update requester is notified of the update completion based on the update completion signal from all the hosts on the update accepting side to release the exclusive request. The host on the update accepting side inputs the update data transmitted through the communication control device by the second access means, performs the exclusive control in the host of the common table of the own host, updates the host, and executes the exclusive control in the host at the end of the update. And returns an update completion signal.

The first access means and the second access means perform in-host exclusive control based on the reference request of the reference requester to perform reference, and notify the reference requester of the reference end when the reference is completed, The exclusive control within the host is released by the release notification of the reference requester.

As described above, the access efficiency at the time of referring to the common table having information common to a plurality of hosts can be improved.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an apparatus for synchronizing information update between hosts according to an embodiment of the present invention. FIG. 2 is a block diagram of a table update request host of the inter-host information update synchronization device of the present invention. FIG. 3 is a block diagram of the table update receiving host of the inter-host information update synchronization device of the present invention.

In FIG. 1 to FIG. 3, the host information update synchronizing device is a table update requesting host as a plurality of hosts including common tables 20A and 20B which are connected via the communication control device 30 and store common information. 10A
And a table update reception host 10B (here, the number of table update reception hosts 10B may be one or more), and a plurality of hosts that perform exclusive control between the common tables 20A and 20B based on the input exclusion request signal. And a host control device 40. The multiple-host control device 40 includes an inter-host exclusive control information table 41.

Here, the feature of the present invention is that the table update request host 10A outputs the above exclusion request signal based on the exclusion request from the table update requester 51 as the update requester, and the table update requester 51 Table 20 of the host based on the update request and update data
A is updated by performing exclusive control within the host of A, and when the update is completed, the update data is transmitted to the table update reception host 10B via the communication control device 30 and the update completion is notified to the table update requester 51 to request the table update. Access means for releasing the exclusive control in the host by the release notification of the user 51, notifying the table update requester 51 of the completion of the update based on the update completion signal from the table update reception host 10B, and releasing the exclusive request. The table update receiving host 10B receives the update data transmitted via the communication control device 30, performs the exclusive control within the host in the common table 20B of the host, updates the same, and executes the exclusive control within the host when the update is completed. And second access means for returning the update completion signal.

Further, the first access means and the second access means perform in-host exclusive control based on the reference request of the table reference requesters 52A and 52B as the reference requester, and refer to the information when the reference is completed. It includes means for notifying the table reference requesters 52A and 52B of the end, and releasing the intra-host exclusive control by the release notification of the table reference requesters 52A and 52B.

Further, the first access means inputs the exclusive request between the hosts 11A which outputs the exclusive request signal based on the exclusive request from the table update requester 51 and the update request from the table update requester 51. The exclusive control means 13A and the exclusive control means 13A serve as the first exclusive control means in the host which performs the exclusive control in the host of the common table 20A of the own host and releases the exclusive control in the host in response to the release notification from the table update requester 51. Control table 1
2A and the first table that updates the common table 20A of its own host based on the update data from the table update requester 51, outputs this update data when the update is completed, and notifies the table update requester 51 of the update end. Table updating means 14A as the updating means, and table updating means 14A
Is transmitted to the table update reception host 10B via the communication control device 30, and the table update requester 51 is notified of the update completion based on the update completion signal from the table update reception host 10B, and the inter-host exclusive control is performed. The communication means 15A is included as the first communication means to be released, and the second access means receives update data from the communication means 15A via the communication control device 30 and performs the update based on the input update end signal. A communication means 15B as a second communication means for returning a completion signal; an update request signal and the update data based on the update data from the communication means 15B; A table control means for outputting an update end signal; The intra-host exclusive control means 13B and the intra-host exclusive control table 12B as second intra-host exclusive control means for performing intra-host exclusive control of the communication table 20B and releasing the intra-host exclusive control based on the intra-host exclusive release signal; A table updating unit that updates the common table of the host based on the update data from the table control unit and outputs the update completion notification when the update is completed; 13A and 13B include means for performing in-host exclusive control of the common tables 20A and 20B of the host based on reference requests from the table reference requesters 52A and 52B, respectively, and the first access means and the second access means Is based on the reference request from the table reference requesters 52A and 52B. Table 20A,
It includes table reference means 22A and 22B for referring to 20B.

The first access means is activated by the communication means 15A, and when the update completion signal is not received for a predetermined time or more, the first access means makes a retry request to the communication means 15A. A communication table 16 is provided, and the communication means 15A includes means for transmitting update data from the table update means 14A and activating the time monitoring means 17, and means for retransmitting the update data based on the retry request.

Further, the first access means is activated by the communication means 15A, and is provided with a serial number control means 19 as a first serial number storage means for providing and storing serial number data of its own host.
A and the communication means 15A including the serial number table 18A.
Includes means for activating the serial number control means 19A upon receiving update data from the table updating means 14A, and means for adding the serial number data of the host from the serial number control means 19A to the update data and transmitting the update data. The second access means includes a serial number control means 19B and a serial number table 18A as second serial number storage means for storing serial number data from the communication means 15B.
Means for giving the serial number data added to the update data received from 5B to the number control means 19B, and means for adding the serial number data from the serial number control means 19B to the update end signal from the table control means 21 and returning it. The communication means 15A compares the serial number data added to the update end signal from the communication means 15B with the serial number data from the serial number control means 19A, and determines the table update requester 5
1 means for notifying communication completion.

The operation of the host-to-host information updating / synchronizing device having such a configuration will be described. FIG. 4 is a flowchart showing the processing of the table update requesting host of the inter-host information update synchronization device of the present invention. FIG. 5 is a flowchart showing the transmission process of the communication means of the table update requesting host of the inter-host information update synchronization device of the present invention. FIG. 6 is a flowchart showing the reception processing of the communication means of the table update requesting host of the inter-host information update synchronization device of the present invention.
FIG. 7 is a flowchart showing the processing of the table update receiving host of the inter-host information update synchronization device of the present invention. FIG. 8 is a flowchart showing the processing of the time monitoring means of the table update requesting host of the inter-host information update synchronization device of the present invention.

In FIG. 4, table update requesting host 1
In 0A, when the common table 20A having information common to a plurality of hosts needs to be updated, the table update requester 51 prevents the table updating means 14A from simultaneously updating the common tables 20A and 20B on own and other hosts. To
The multiple host control device 40 is used by the inter-host exclusive control means 11A.
Is controlled so that the common tables 20A and 20B are mutually exclusive. If the exclusion succeeds, the table update requester 51 activates the intra-host exclusive control unit 13A to perform exclusive control within the host, and activates the table update unit 14A. The table updating means 14A updates the common table 20A and activates the communication means 15A to notify other hosts of the update data. If the exclusion of the table 20A fails, the process waits until the request is accepted.

5 and 6, the communication means 15A
Firstly calls the serial number control means 19A and sends the unique serial number data to the table update requesting host 10A.
The serial number data obtained from the serial number control unit 19A and added to the update data is stored in the serial number table 18A.
To monitor the communication state, the time monitoring means 17 is called.

The time monitoring means 17 monitors the communication table 16 at predetermined time intervals, and issues a retry request to the communication means 15A if the state does not change. After calling the time monitoring means 17, the communication means 15A adds the serial number data and transfers the updated data via the communication control device 30 for updating the table of the other host. At the same time, the communication flag is stored in the communication table 16 for each table update receiving host.

In FIG. 7, in the table update receiving host 10B that has received the table update request, the communication means 15B
Is started and the serial number data added to the update data transferred from the table update request host 10A is compared with the contents of the serial number table 18B. If the notified serial number data is old, it is ignored. Is passed to the table control means 21.

The table control means 21 activates the intra-host exclusive control means 13B and excludes the common table 20B in order to prevent simultaneous updating or simultaneous reference in the host.
If the exclusion succeeds, the table updating means 14B is activated. If exclusion fails, wait until successful.

The table updating means 14B updates the common table 20B with update data. Table control means 21
Then, after the table update is completed, the communication unit 15B is called for a data update completion report. The communication means 15B adds the serial number data obtained from the serial number table by the serial number control means 19B and notifies the table update request host 10A via the communication control device 30 that the table update is completed. The communication means 15A of the data transmission source that has received the data update completion notification compares the serial number data passed from the destination table update reception host 10B with the serial number data stored in the serial number table 18B. It is determined that this is a communication termination notification. If they are not the same, it is determined that this is not an end notification for this communication, and the end notification is waited for.

In FIG. 6 and FIG. 8, when the end notification is not received after waiting for a predetermined time, a retry request is made by the time monitoring means 17. The communication unit 15A that has received the retry request issues a retry request by setting the communication-in-progress flag of the communication table 16 to "off", and sets the retry-in-progress flag of the communication table 16 to "on". Upon receiving the table update completion notification from all communication partner hosts, the communication unit 15A of the update data transmission source stops the time monitoring unit 17 and notifies the table update requester 51.

The table update requester 51 that has received the notification releases the exclusion of the common table 20A common to a plurality of hosts and ends the processing.

By the above operation, the table of each host having information common to a plurality of hosts is not updated only for a table having information common to a plurality of hosts of a certain host, and is updated without contradiction for all hosts.

When the table is referred to, the exclusive control means 13A (13B) in the host is called and exclusive is executed in order to prevent simultaneous execution with the update request by another process. When the exclusion is successful, the table reference unit 22A (22B) is called to refer to the common table 20A (20B). By this operation, when referring, the user can refer without regard to other hosts, and the access efficiency can be improved.

As described above, according to the present embodiment, the user who mainly refers to the system can improve the access efficiency by performing the exclusive control between the hosts of the common table only at the time of updating and performing the exclusive control only within the host at the time of reference. Can be improved. Further, since the table is updated via the communication control device, the communication may be interrupted due to the intermittent failure of the communication control device. However, the communication is not interrupted by performing the time monitoring. Furthermore, by managing using serial numbers, it is possible to prevent duplicate notifications from the communication control device.

[0032]

As described above, the present invention has an excellent effect of improving access efficiency when referring to a common table having information common to a plurality of hosts.

[Brief description of the drawings]

FIG. 1 is a block diagram of a host-to-host information update synchronization device according to an embodiment of the present invention;

FIG. 2 is a block diagram of a table update request host of the inter-host information update synchronization device of the present invention.

FIG. 3 is a block diagram of a table update receiving host of the inter-host information update synchronization device of the present invention.

FIG. 4 is a flowchart showing processing of a table update requesting host of the inter-host information update synchronization device of the present invention.

FIG. 5 is a flowchart showing a transmission process of a communication unit of a table update requesting host of the inter-host information update synchronization device of the present invention.

FIG. 6 is a flowchart showing a reception process of a communication unit of a table update requesting host of the inter-host information update synchronization device of the present invention.

FIG. 7 is a flowchart showing processing of a table update receiving host of the inter-host information update synchronization device of the present invention.

FIG. 8 is a flowchart showing the processing of the time monitoring means of the table update requesting host of the inter-host information update synchronization device of the present invention.

[Explanation of symbols]

 10A Table update requesting host 10B Table update receiving host 11A, 11B Inter-host exclusive control means 12A, 12B In-host exclusive control table 13A, 13B In-host exclusive control means 14A, 14B Table updating means 15A, 15B Communication means 16 Communication table 17 hours Monitoring means 18A, 18B Serial number table 19A, 19B Serial number control means 20A, 20B Common table 21 Table control means 22A, 22B Table reference means 30 Communication control device 40 Multiple host control device 41 Inter-host exclusive control information table 51 Table update requester 52A , 52B Table reference requester

Claims (2)

(57) [Claims] A plurality of hosts connected via a communication control unit and each including a common table for storing common information, and a host configured to not simultaneously update the common table based on an input exclusion request signal. In an inter-host information update synchronization device including a plurality of host control devices that perform exclusive control, an update requesting host outputs the above-mentioned exclusive request signal based on an exclusive request from an update requester, and the update requester Updates by performing in-host exclusive control of the common table of the own host based on the update request and the update data of the host, transmits the update data to the update receiving side host via the communication control device when the update is completed, and notifies the end of the update. The update requester is notified, the exclusive control in the host is released by the release requester's release notification, and the update request from all hosts on the update accepting side is released. A first access unit for notifying the update requester of the completion of the update based on a completion signal and canceling the exclusion request, wherein the host on the update accepting side updates the update transmitted through the communication control device. enter the data update performed hosts within the exclusive control of a common table of its own host releases the host in exclusive control when updating completion viewed including the second access means for returning the update completion signal, the first Access means and said second access means
Performs exclusive control within the host based on the reference request of the reference requester.
Go to the local host's common table, and at the end of the reference
Notify the reference requester of the end of the reference, and
An inter-host information updating / synchronizing device including means for canceling intra-host exclusive control in response to a cancellation notification . A first access unit that outputs the exclusion request signal based on the exclusion request from the update requester; and an own host that inputs the update request from the update requester. A first intra-host exclusive control means for performing intra-host exclusive control of the common table and releasing the intra-host exclusive control in response to a release notification from the update requester, and a common host for the own host based on the update data from the update requester A first table updating means for updating the table, outputting this update data at the end of the update, and notifying the update requester of the end of the update, and updating the update data from the first table update means with the communication control device To the host on the update accepting side, and notifies the update requester of the completion of the update based on the update complete signal from all the hosts on the update accepting side, and discharges the data between the hosts. First communication means for canceling the other control, the second access means receives update data from the first communication means via the communication control device, and based on an update end signal to be input A second communication unit that returns the update completion signal, and outputs an update request signal and the update data based on the update data from the second communication unit,
Table control means for outputting an in-host exclusion release signal and the update end signal based on the update end notification to be input,
Second intra-host exclusive control means for performing intra-host exclusive control of the common table of the host based on the update request from the table control means and releasing intra-host exclusive control based on the intra-host exclusive release signal; A second table updating unit that updates the common table of the host based on the update data from the control unit and outputs the update end notification when the update is completed, the first host exclusive control unit and the second The second host exclusive control means includes means for performing in-host exclusive control of the common table of the own host based on a reference request from the update referrer, respectively, the first access means and the second access means,
The inter-host information update synchronization device according to claim 1, further comprising table reference means for referring to a common table of the host based on a reference request from the update reference person.