JP2013196400A - Redundancy configuration device, and method of controlling synchronous data used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a redundancy configuration device which can operate with a performance not lower than conventional ones even under a configuration in which a slight difference in performance or a difference in timing or the like is generated between an active system and a standby system, by means of a switching process or the like of a device in which hardware or software is updated.SOLUTION: A redundancy configuration device includes an active-system communication control device (1) and a standby-system communication control device (2) each of which has functions of operating while transferring synchronous data via an inter-device communication channel (100), and of performing duplex management of a hot standby configuration. The active-system communication control device (1) includes transmission rate control means (14) for controlling a transmission rate of the synchronous data between the active system and the standby system.

Description

  The present invention relates to a redundant configuration device and a synchronous data control method used therefor, and more particularly to a synchronous data control method in a redundant configuration device.

  In the redundant configuration device related to the present invention, due to device switching associated with EoL (End of Life) of device parts, both the active system and the standby system are not always replaced at the same time in the switching process. In some cases, devices having different processing capabilities and processing timings are used in a mixed manner in the active system and the standby system.

  In the above redundant configuration apparatus, synchronous data is exchanged between the active system and the standby system in order to make the statuses of the active system and the standby system the same (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 2007-028169

  In the above-described redundant configuration device related to the present invention, due to device switching and software file updating accompanying device part EoL, devices with different processing capabilities and processing timings are mixed in the active system and standby system in the switching process. May be used.

  In this case, when the application process in operation becomes bursty, the synchronization data exchanged between the active system and the standby system is discarded, and retransmission occurs, so that the processing response time of the application in the apparatus deteriorates. .

  However, since it is difficult to change the device processing that has already been operated and deployed, there is a search for a solution to such a problem without changing the device. In the above-mentioned Patent Document 1, a similar problem may occur.

  Therefore, the object of the present invention is to solve the above-mentioned problems, and in a configuration in which a slight difference in performance and a difference in processing timing occur between the active system and the standby system due to the switching process of the devices with updated hardware and software. It is another object of the present invention to provide a redundant configuration apparatus that can operate without deterioration from the conventional performance and a synchronous data control method used therefor.

The redundant configuration device according to the present invention operates by performing synchronous data transfer via an inter-device communication path, and has a function of performing redundant management of a hot standby configuration, and standby communication control. A redundant configuration device including a device,
The operational communication control device includes a transmission rate control means for controlling a transmission rate between the operational system and the standby system of the synchronous data.

The synchronous data control method according to the present invention includes an active communication control apparatus and a standby communication function each of which operates by transferring synchronous data via an inter-apparatus communication path and has a function of performing duplication management of a hot standby configuration. A synchronous data control method used for a redundant configuration device including a control device,
The active communication control apparatus executes a transmission rate control process for controlling a transmission rate between the active system and the standby system of the synchronous data.

  The present invention has a configuration and operation as described above, so that a slight difference in performance and a difference in processing timing and the like occur between the active system and the standby system due to the switching process of the devices with updated hardware and software. In this case, the effect of being able to operate without deterioration from the conventional performance can be obtained.

It is a block diagram which shows the structural example of the redundant configuration apparatus by embodiment of this invention. It is a sequence chart which shows the operation example of the redundant configuration apparatus by embodiment of this invention. It is a sequence chart which shows the operation example of the redundant configuration apparatus by embodiment of this invention. It is a sequence chart which shows the operation example of the redundant configuration apparatus by embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. First, the redundant configuration apparatus according to the present invention is a hot standby redundant configuration apparatus.

  In this hot standby redundant configuration device, if there is a slight difference in performance or processing timing between the active system and the standby system due to the switching process of the hardware and software updated devices, the active system and the standby system Since the synchronization data exchanged in the network is discarded and retransmission occurs, OS (Operating System) resources such as CPU (Central Processing Unit) and memory are consumed for data synchronization processing. May affect.

  In the redundant configuration device according to the present invention, by controlling the transmission rate between the operation system and the standby system of the synchronous data, to solve the above-described problem, that is, by the switching process of the device with updated hardware and software, etc. Even in a configuration in which a slight difference in performance or a difference in processing timing occurs between the active system and the standby system, the system can operate without deterioration from the conventional performance.

  FIG. 1 is a block diagram showing a configuration example of a redundant configuration apparatus according to an embodiment of the present invention. In FIG. 1, the redundant configuration apparatus according to the embodiment of the present invention includes an active communication control apparatus 1 and a standby communication control apparatus 2, and the active communication control apparatus 1 is configured according to the present embodiment. The standby communication control device 2 has a configuration with conventional performance.

  That is, the active communication control apparatus 1 includes APL (Application) groups 11-1 to 11-N and a redundancy control unit 12, and the redundancy control unit 12 includes a DB (database) 13, a transmission rate control unit 14, and the like. It has. The standby communication control device 2 includes APL groups 21-1 to 21 -N and a redundancy control unit 22, and the redundancy control unit 22 includes a DB 23.

  The active communication control device 1 and the standby communication control device 2 transfer synchronous data via the inter-device communication path 100 and operate as redundant configuration devices.

  The redundancy control units 12 and 22 are applications having a function of performing the redundant management of the hot standby configuration of the communication control device, and each APL group 11-11-1-1 created by processing with the APL server 3 or the like. The synchronization data required for each N and 21-1 to 21-N is stored and synchronized with the standby system.

  The transmission rate control unit 14 performs data transmission control to the inter-device communication path 100 in the active redundancy control unit 12. When the standby system is activated, the transmission rate control unit 14 performs dummy synchronous data transfer in order to confirm the synchronous data processing capability on the standby system side, and confirms a rate value at which no retransmission occurs.

  The transmission rate control unit 14 performs transfer control at a rate that does not exceed the rate when the synchronous data is transferred to the standby system in response to a request from the APL groups 11-1 to 11-N. In this embodiment, the transmission rate control unit 14 is provided so that communication between the active system and the standby system can be performed even when there is a synchronous data registration request from the APL groups 11-1 to 11-N in bursts. This makes it possible to prevent unnecessary retransmissions and prevent response delays in synchronous data registration requests.

  In addition, since the dummy synchronous data transfer can be processed as normal data in the redundant controller 22 of the conventional performance that does not have the configuration of the present embodiment, it can be operated as it is in the existing processing, and the active device It is possible to respond without changing the process.

  2 to 4 are sequence charts showing an operation example of the redundant configuration apparatus according to the embodiment of the present invention. The operation of the redundant configuration apparatus according to the embodiment of the present invention will be described with reference to FIGS. Here, an operation is shown in which the corresponding redundant configuration device connects to the APL server 3 and returns a response to the request from the APL server 3.

  FIG. 2 shows the in-device operation when the standby communication control device 2 is started up. When the standby communication control device 2 is activated, the redundant control unit 22 that has become the standby system issues a synchronization request for all data to the active redundant control unit 12 (a1 in FIG. 2). At that time, in order to determine the communication rate between the active system and the standby system at the transmission rate control unit 14, the redundancy control unit 12 first transmits dummy data to the standby system redundancy control unit 22 at the maximum rate. (A2 in FIG. 2).

  The dummy data can be processed as normal data by the standby redundancy control unit 22 and returns a response after processing, but if it cannot be processed by the standby system and is discarded (a3 in FIG. 2), the operational system No response is returned to the active redundancy control unit 12 and the retransmission timer expires [Retransmission T. O (Time Out)] (a4 in FIG. 2).

  In the redundancy control unit 12, since the corresponding data is retransmitted at that timing, it is regarded as NG, the transmission rate control unit 14 lowers the communication rate, and the dummy data transmission is performed again (a5 in FIG. 2). The redundancy control unit 12 repeats this process to determine a communication rate at which no retransmission occurs.

  At this time, since the communication rate value at which retransmission does not occur for each configuration pattern of the devices having different performances is stored in advance in the transmission rate control unit 14, the pattern of the communication rate reduction width is reduced. The time until determining the communication rate can be shortened.

  The communication rate between the active system and the standby system that are determined as described above and that does not cause retransmission is stored in the transmission rate control unit 14. Thereafter, the dummy data remaining in the standby system is deleted (a6 in FIG. 2), and then the data stored in the active DB 13 is synchronized in accordance with the all data synchronization request in the process a1 (FIG. 2). 2 a7), a normal response is returned from the standby system to the active system (a8 in FIG. 2), stored in the standby DB 23, and data is expanded to the standby APL groups 21-1 to 21-N. Thus (a9 in FIG. 2), the data in the active system and the standby system are matched, and the operation in the redundant configuration is continued (a10 in FIG. 2).

  FIG. 3 shows the in-device operation in response to a request from the APL server 3 in the above redundant configuration. When the active APL group 11-1 receives a processing request from the APL server 3 (b1 in FIG. 3), it instructs the redundant control unit 12 to issue a synchronous data registration request (b2 in FIG. 3). After the synchronization data registration request is stored in the active DB 13, data is transmitted to the standby redundancy control unit 22 via the inter-device communication path 100 in order to synchronize with the standby system (b3 in FIG. 3). ).

  The standby redundancy control unit 22 stores the synchronization data in the standby DB 23 and then expands the data to the corresponding APL group 21-1 (b4 in FIG. 3). When the data expansion to the APL group 21-1 is completed, the APL group 21-1 responds to the standby redundancy control unit 22 (b5 in FIG. 3), and the standby redundancy control unit 22 It responds to the control part 12 (b6 of FIG. 3).

  Only when there is a response from the redundant controller 22 in the standby system, the response to the registration request is completed to the APL group 11-1 as the synchronization data registration request source (b7 in FIG. 3), and a response is returned to the APL server 3. (B8 in FIG. 3).

  Here, when there are a large number of processing requests from the APL server 3, synchronous data registration requests from the APL group 11-1 to the active redundant control unit 12 are generated in bursts.

  In such a case, if the function of the transmission rate control unit 14 is not provided as in the present embodiment, the communication load between the active system and the standby system increases as shown in FIG. The redundant control unit 22 frequently discards (c4 and c6 in FIG. 4), and as a result, frequent retransmissions from the active redundant control unit 12 (c5 in FIG. 4), and the standby redundant control unit 22 increasingly. This results in a vicious circle of increasing the load of the server, and a response delay failure to the APL server 3 occurs (c7 in FIG. 4), resulting in deterioration of the performance of the entire apparatus in the hot standby configuration.

  Here, as in the data transmission of FIG. 3 (b3 processing), the transmission rate control unit 14 controls the transmission rate to the redundant control unit 22 of the standby system, so that the connection between the active system and the standby system is performed. It is possible to prevent retransmission of communication, and it is possible to prevent a response delay to the APL server 3 due to retransmission of communication between the active system and the standby system.

  As described above, in the present embodiment, in the redundant configuration device, in the configuration in which a slight difference in performance and a difference in processing timing occur between the active system and the standby system due to the switching process of the hardware and software updated devices. However, it is possible to operate without degrading the conventional performance.

  In the present embodiment, the above effect can be dealt with by adding a partial function (function of the transmission rate control unit 14) to the redundancy control unit 12. Furthermore, in the present embodiment, the above-described effects can be obtained without changing the conventional device that becomes the standby system.

1 Operational communication control device
2 Standby communication control devices 11-1 to 11-N,
21-1 to 21-N APL group
12,22 Redundant control unit
13,23 DB
14 Transmission rate control unit

Claims (8)

A redundant configuration device including an active communication control device and a standby communication control device each of which operates by transferring synchronous data via an inter-device communication path and has a function of performing redundant management of a hot standby configuration. And
The redundant configuration apparatus, wherein the active communication control apparatus includes a transmission rate control means for controlling a transmission rate between the active system and the standby system of the synchronous data.   The transmission rate control means performs dummy synchronous data transfer for confirming the synchronous data processing capability on the standby system side when the standby system is activated, and confirms a rate value at which retransmission does not occur. The redundant configuration apparatus according to claim 1.   The operational communication control device performs transfer control at a rate that does not exceed a rate value confirmed by the transmission rate control means when transferring the synchronous data to the standby system in response to a request from an application group. 3. The redundant configuration apparatus according to claim 2, wherein   The active communication control device performs the transfer control based on a rate value that is stored in advance in the transmission rate control means and that does not cause retransmission for each configuration pattern of a device having different performance in advance. The redundant configuration apparatus according to claim 3. Used for redundant configuration devices including an active communication control device and a standby communication control device, each of which operates by transferring synchronous data via an inter-device communication path and has a function of performing redundant management of a hot standby configuration A synchronous data control method,
The synchronous data control method, wherein the active communication control apparatus executes a transmission rate control process for controlling a transmission rate between the active system and the standby system of the synchronous data.   In the transmission rate control process, the active communication control apparatus performs dummy synchronous data transfer for confirming the synchronous data processing capability on the standby system side when the standby system is activated, and a rate at which no retransmission occurs. 6. The synchronous data control method according to claim 5, wherein the value is confirmed.   The operational communication control device performs transfer control at a rate that does not exceed the rate value confirmed in the transmission rate control process when the synchronous data is transferred to the standby system in response to a request from an application group. The synchronous data control method according to claim 6, wherein:   8. The synchronization according to claim 7, wherein the active communication control device performs the transfer control based on a rate value that is stored in advance and does not cause retransmission for each configuration pattern of devices having different performance in advance. Data control method.

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