JPH05241999A - Inter-host information update synchrnoizing device - Google Patents

Abstract

PURPOSE:To improve access efficiency by performing inter-host exclusive control on a common table only when update is performed, and performing exclusive control only on a host when reference is performed. CONSTITUTION:In a table update request host 10A, a table update requester 51 performs such control that the exclusion of the common tables 20A, 20B can be performed on plural host controllers 40 by an inter-host exclusive control means 11A so as not to update the common tables 20A, 20B simultaneously by a table update means 14A in its own and another hosts. When it succeeds in exclusion, the table update requester 51 performs the exclusive control on the host by starting up an in-host exclusive control means 13A, and starts up the table update means 14A. The table update means 14A updates the common table 20A, and starts up a communication means 15A to inform update data to another host. When the exclusion of the table 20A fails, the acceptance of a request is awaited.

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 synchronization device for updating a common table storing common information of a plurality of hosts.

[0002]

2. Description of the Related Art Conventionally, an inter-host information update synchronization device is
An inter-host exclusive control means is provided with an inter-host exclusive control information table for determining whether or not it is possible to refer to or update the common table from multiple hosts having a common table containing information common to multiple hosts. Therefore, a common table having information common to a plurality of hosts is exclusively used for reference and update.

[0003]

However, in such a conventional inter-host information update synchronization device, even if only the reference of the table having the information common to a plurality of hosts frequently occurs and the update is small, the inter-host information update synchronization device There is a drawback that access efficiency is poor because exclusion control means must perform exclusion.

The present invention solves the above-mentioned drawbacks, and an object of the present invention is to provide an inter-host information update synchronization device capable of improving the access efficiency at the time of referring to a common table having common information among a plurality of hosts. ..

[0005]

SUMMARY OF THE INVENTION According to the present invention, a plurality of hosts, each of which is connected through a communication control device and includes a common table for storing common information, and a host of the common table based on an input exclusive request signal are input. In the inter-host information update synchronization device including a plurality of host control devices that perform exclusive control, the update request side host outputs the exclusion request signal based on the exclusion request from the update requester, and the update requester Update request and update data by performing in-host exclusive control of the common table of the own host and updating, and at the end of update, this update data is sent to the host on the update receiving side via the communication control device, and the update end Notify this update requester, release the exclusive control within the host by the release notification of this update requester, and update completion signal from all hosts on this update receiving side. And a first access means for notifying the update requester of completion of update and canceling the exclusive request based on the update requester, and the host on the update receiving side inputs the update data transmitted via the communication control device. It is characterized by including a second access means for performing the in-host exclusive control of the common table of the own host to update it, releasing the in-host exclusive control at the end of the update, and 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 a reference request from a reference requester for reference, and refer to reference end at the end of reference. It is possible to include means for notifying the requester and for canceling the in-host exclusive control by the notice of cancellation of the reference requester.

Further, according to the present invention, the first access means is an inter-host exclusive control means for outputting the exclusion request signal based on an exclusion request from the update requester, and an update request from the update requester. Based on the first in-host exclusive control means that inputs and performs in-host exclusive control of the common table of the own host and releases the in-host exclusive control by the release notification from this update requester, and the update data from this update requester The common table of the own host is updated, the update data is output at the end of the update, and the first table updating means for notifying the update requester of the update completion and the update data from the first table updating means It transmits to the update reception side host via the communication control device, and notifies the update requester of the update completion based on the update completion signal from all the update reception side hosts. The second access means receives the update data from the first communication means via the communication control device and inputs the update data from the first communication means. A second communication means for returning the update completion signal based on the update end signal, an update request signal based on the update data from the second communication means and the update data, and a host based on the input update end notification A table control unit that outputs an internal exclusion release signal and the update end signal, and an internal host exclusive control of the common table of the own host based on the update request from the table control unit, and an internal host release based on the internal host exclusion release signal The second host exclusive control means for releasing exclusive control and the common table of the own host are updated based on the update data from the table control means. And a second table updating means for outputting the update end notification at the end of updating, wherein the first in-host exclusive control means and the second host exclusive control means are respectively based on a reference request from an update reference person. A table reference including means for performing in-host exclusive control of the common table of the own host, wherein the first access means and the second access means refer to the common table of the own host based on a reference request from the update reference person. Means can be included.

According to the present invention, the host on the update request side is started by the first communication means and a retry request is issued to the first communication means when the update completion signal is not received for a predetermined time or longer. Equipped with a retry means
The first communication means may include means for transmitting the update data from the first table updating 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 a first serial number storage means which is activated by the first communication means and which gives and stores serial number data of the own host.
The first communication means activates the first serial number storage means when the update data is received from the first table update means, and the update data includes a host from the first serial number storage means. Of the update receiving side, the host of the update receiving side includes a second serial number storage means for storing serial number data from the second communication means, 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 from the second serial number storage means. Means for adding serial number data and returning it, wherein the first communication means includes serial number data added to the 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 host on the update request side outputs an exclusive request signal to the plural host control device based on the exclusive request from the update requester by the first access means, and based on the update request and the update data from the update requester. It updates by performing in-host exclusive control of the common table of the own host, sends this update data to the host on the update receiving side via the communication control device at the end of update, and notifies the update requester of this update end The exclusive control in the host is released by the update 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 receiving side, and the exclusive request is released. The host on the update receiving side inputs the update data transmitted via the communication control device by the second access means, performs the in-host exclusive control of the common table of the own host to update, and at the end of update, the in-host exclusive control And the update completion signal is returned.

Further, the first access means and the second access means perform in-host exclusive control based on the reference request from the reference requester for reference, and notify the reference requester of reference end at the end of reference, The in-host exclusive control is released by the release notification of the reference requester.

As described above, it is possible to improve the access efficiency at the time of referring to the common table having common information among a plurality of hosts.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block configuration diagram of an inter-host information update synchronization device according to an embodiment of the present invention. FIG. 2 is a block diagram of the 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.

1 to 3, the inter-host information update synchronization device is a table update request host as a plurality of hosts each including common tables 20A and 20B connected via the communication control device 30 and storing common information. 10A
And a table update reception host 10B (here, the number of the table update reception host 10B may be one or more), and a plurality of hosts for performing mutual exclusion control between the common tables 20A and 20B based on the input exclusion request signal. The host control device 40, and the multiple host control device 40 includes an inter-host exclusive control information table 41.

A feature of the present invention is that the table update requesting host 10A outputs the above exclusion request signal as an update requester based on the exclusion request from the table update requesting person 51, and the table update requesting person 51 Common table 20 of own host based on update request and update data of
A update is performed by performing the in-host exclusive control of A, and at the end of the update, this update data is transmitted to the table update accepting host 10B via the communication control device 30 and the update end is notified to the table update requester 51 to request the table update. And a first access means for releasing the exclusive control in the host by the release notification of the person 51 and notifying the table update requester 51 of the update completion based on the update completion signal from the table update receiving host 10B and releasing the exclusive request. The table update reception host 10B inputs the above update data transmitted via the communication control device 30, performs the in-host exclusive control of the common table 20B of its own host, and updates it, and at the end of the update, the in-host exclusive control And a second access means for releasing the update completion signal and returning the update completion signal.

Further, the first access means and the second access means perform intra-host exclusive control based on the reference request from the table reference requesters 52A and 52B as reference requesters, and refer to them at the end of reference. It includes means for notifying the table reference requesters 52A, 52B of the end, and for canceling the in-host exclusive control by the cancellation notification of the table reference requesters 52A, 52B.

Further, the first access means inputs the inter-host exclusive control means 11A which outputs the exclusion request signal based on the exclusion request from the table update requester 51 and the update request from the table update requester 51. Then, the in-host exclusion control means 13A and the in-host exclusion control are performed as the first in-host exclusion control means for performing the in-host exclusion control of the common table 20A of the own host and releasing the in-host exclusion control by the release notification from the table update requester 51. Control table 1
2A and the common table 20A of the own host is updated based on the update data from the table update requester 51, the update data is output at the end of the update, and the first table for notifying the table update requester 51 of the update end Table updating means 14A as updating means, and table updating means 14A
From the table update reception host 10B via the communication control device 30 to notify the table update requester 51 of the completion of the update based on the update completion signal from the table update reception host 10B to perform the inter-host exclusive control. The second access means includes the communication means 15A as the first communication means to be released, and the second access means receives the update data from the communication means 15A via the communication control device 30 and updates the update data 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 based on the update data from the communication means 15B and the update data are output, and an in-host exclusion release signal and the above-mentioned based on the input update end notification A table control unit 21 that outputs an update end signal, and an own host host based on an update request from the table control unit 21. An in-host exclusion control means 13B and an in-host exclusion control table 12B as second in-host exclusion control means for performing in-host exclusion control of the communication table 20B and releasing the in-host exclusion control based on the in-host exclusion release signal; The common table of the own host is updated based on the update data from the table control means 21, and the table update means 14B is included as the second table update means that outputs the update end notification at the end of the update. 13A and 13B include means for performing in-host exclusive control of the common tables 20A and 20B of the own host based on reference requests from the table reference requesters 52A and 52B, respectively, and the first access means and the second access means. Based on the reference requests from the table reference requesters 52A and 52B. Table 20A,
It includes table reference means 22A and 22B for referencing 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 longer, the time access means 17 is a retry means for making a retry request to the communication means 15A. A communication table 16 is provided, and the communication means 15A includes means for transmitting the update data from the table updating 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 the serial number control means 19 as a first serial number storage means for giving and storing serial number data of its own host.
Communication means 15A including A and serial number table 18A
Includes means for activating the serial number control means 19A when receiving the 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, and the communication means 15B is the communication means 1
5B, and means for giving the serial number data added to the update data to the serial 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. In addition, the communication unit 15A compares the serial number data added to the update end signal from the communication unit 15B with the serial number data from the serial number control unit 19A, and the table update requester 5
1 includes means for notifying communication completion.

The operation of the inter-host information update synchronization device having such a configuration will be described. FIG. 4 is a flow chart showing the process of the table update request host of the inter-host information update synchronization device of the present invention. FIG. 5 is a flowchart showing the transmission processing of the communication means of the table update request host of the inter-host information update synchronization device of the present invention. FIG. 6 is a flow chart showing the receiving process of the communication means of the table update request host of the inter-host information update synchronization device of the present invention.
FIG. 7 is a flow chart 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 flow chart showing the processing of the time monitoring means of the table update request host of the inter-host information update synchronization device of the present invention.

In FIG. 4, the table update request host 1
In 0A, when it is necessary to update the common table 20A having information common to a plurality of hosts, the table update requester 51 does not simultaneously update the common tables 20A and 20B in the host and the other host by the table updating means 14A. To
The plural host control device 40 by the inter-host exclusive control means 11A
Is controlled so that the common tables 20A and 20B are mutually exclusive. If the exclusion is successful, the table update requester 51 activates the in-host exclusion control means 13A to perform in-host exclusion control, and activates the table update means 14A. The table updating means 14A updates the common table 20A, and activates the communication means 15A to notify other hosts of the updated data. If the exclusion of the table 20A fails, it waits until the request is accepted.

5 and 6, the communication means 15A
First, the serial number control means 19A is called and the serial number data unique to the table update request host 10A is serial number table 18A.
The serial number data obtained from the serial number control means 19A is stored in the serial number table 18A.
The time monitoring means 17 is called to monitor the communication status.

The time monitoring means 17 monitors the communication table 16 at predetermined time intervals, and if the state does not change, issues a retry request to the communication means 15A. After calling the time monitoring means 17, the communication means 15A adds the serial number data and transfers the update data via the communication control device 30 in order to update the table of another 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 used.
Is started, 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, and if the notified serial number data is old, it is ignored, and if it is not old, the update data is updated. Only to the table control means 21.

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

The table updating means 14B updates the common table 20B with the update data. Table control means 21
Then, after the table update is completed, the communication means 15B is called for reporting the data update completion. 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 has been completed. The communication means 15A of the data transmission source which has received the data update end notification compares the serial number data passed from the table update reception host 10B of the transmission destination with the serial number data stored in the serial number table 18B, and if they are the same, It is determined that the notification is an end notification for communication. If they are not the same, it is determined that they are not end notifications for this communication, and the end notifications are awaited.

In FIGS. 6 and 8, when the end notification is not received even after waiting for a predetermined time, the time monitoring means 17 requests the retry. Receiving the retry request, the communication unit 15A sets the communication flag of the communication table 16 to "off" and issues a retry request, and sets the retry flag of the communication table 16 to "on". When the communication means 15A of the update data transmission source receives the table update completion notice from all the communication counterpart hosts, it stops the time monitoring means 17 and notifies the table update requester 51.

Upon receiving the notification, the table update requester 51 releases the exclusion from 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 by the table having information common to a plurality of hosts of a certain host, and is updated without any contradiction.

Further, at the time of referring to the table, in-host exclusive control means 13A (13B) is called and exclusive in order to prevent simultaneous execution with an update request by another process. If the exclusion is successful, the table reference means 22A (22B) is called and the common table 20A (20B) is referenced. By this operation, the reference can be made without being aware of other hosts at the time of reference, and the access efficiency can be improved.

As described above, in the present embodiment, the exclusive control between hosts of the common table is performed only at the time of updating, and the exclusive control is performed only within the host at the time of reference, so that the users who mainly refer can improve the access efficiency. Can be improved. Further, since the table is updated via the communication control device, communication may be interrupted due to an intermittent failure of the communication control device, but the time monitoring does not interrupt communication. Furthermore, by using the serial number for management, 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 the access efficiency at the time of referring to a common table having common information among a plurality of hosts.

[Brief description of drawings]

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

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

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

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

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

FIG. 6 is a flowchart showing a receiving process of the communication means of the table update request 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 request 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 (3)

[Claims] 1. A plurality of hosts, each of which is connected through a communication control device and includes a common table for storing common information, and a multi-host control device for performing inter-host exclusive control of this common table based on an input exclusion request signal. In the inter-host information update synchronization device including the, the update request side host outputs the exclusion request signal based on the exclusion request from the update requester, and based on the update request and the update data from the update requester. Performs exclusive control within the host of the common table of the own host to update, and at the end of update, sends this update data to the host on the update receiving side via the communication control device, and notifies the update requester of the end of update The in-host exclusive control is released by this update requester's release notification, and the update requester is notified to the update requester based on the update completion signal from all hosts on the update receiving side. A first access means for notifying new completion and canceling the exclusive request, and the host on the update reception side inputs the update data transmitted via the communication control device, and a common table of its own host The inter-host information update synchronization device, further comprising: second access means for performing the in-host exclusive control for updating, releasing the in-host exclusive control for returning the update, and returning the update completion signal. 2. The first access means and the second access means perform intra-host exclusive control based on a reference request from a reference requester for reference, and notify the reference requester of reference end at the end of reference. The inter-host information update synchronization device according to claim 1, further comprising means for releasing the in-host exclusive control by this reference requester release notification. 3. The first access means is an inter-host exclusive control means for outputting the exclusion request signal based on an exclusion request from the update requester, and an update request from the update requester as an input to the own host. Of the common table of the host, and the first in-host exclusive control means for releasing the in-host exclusive control by the release notification from this update requester and the own host common based on the update data from this update requester The table is updated, the update data is output at the end of the update, and first update means for notifying the update requester of the end of update and the update data from the first table update means for the communication control device. To the host on the update receiving side through the above, and based on the update completion signal from all the hosts on the update receiving side, the update requester is notified of the update completion Including a first communication means for releasing other control, the second access means receives the update data from the first communication means via the communication control device, based on the input update end signal Second communication means for returning the update completion signal, and output an update request signal and this update data based on the update data from the second communication means,
Table control means for outputting the in-host exclusion release signal and the update end signal based on the input update end notification,
Second in-host exclusive control means for performing in-host exclusive control of the common table of the own host based on the update request from the table control means, and for canceling in-host exclusive control based on the in-host exclusive release signal; A first table exclusive control means and a second table updating means for updating the common table of the own host based on the update data from the control means and outputting the update end notification at the end of the update. The second host exclusive control means includes means for performing in-host exclusive control of the common table of the own host based on the reference request from the update reference person, respectively, and the first access means and the second access means are:
3. The inter-host information update synchronization device according to claim 1, further comprising a table reference unit that refers to a common table of the own host based on a reference request from the update reference person.