JP4550604B2 - Setting information synchronization program - Google Patents

Description

  The present invention is a configuration information synchronization device that synchronizes the configuration information held by each distribution server in a distribution server system that is operated via a load distribution device that manages processing load distribution. It relates to a program to make it function.

  In a distributed server system in which a plurality of distributed servers are operated via a load balancer, setting information such as information as a host emulator must be the same in each distributed server that is the target of load distribution. Conventionally, when installing a system, it is necessary to manually distribute and match the setting information to all distributed servers that are to be distributed. It was necessary to distribute and synchronize the setting information.

Therefore, in the distributed processing system, in order to be able to change the definition information of each distributed processing device in real time, a management device that centrally manages the definition information is provided, and the definition information A method is known in which changes are controlled synchronously and transferred to each distributed processing device (for example, Patent Document 1).
JP 11-345180 A

  In recent years, the form of a distributed server system operated via a load balancer has increased, and the scale of the system configuration has increased. In addition, since a situation in which the setting information of the distributed server needs to be changed frequently occurs, a mechanism that can flexibly change the setting information from the client side of the distributed server system is required.

  However, in a distributed server system operated via a load balancer, configuration information cannot be distributed by directly specifying each distributed server constituting the system from the client side to be used. Each time the configuration information needs to be changed, the configuration information must be distributed manually to each distributed server. For this reason, when the system configuration is large, manually distributing the setting information to a large number of distributed servers not only increases the work load but also may cause erroneous work.

  In the distributed server system, since client requests are distributed by the load balancer, a technology for centrally managing client setting information change requests by applying a centralized management device for definition information as in Patent Document 1 is applied. I can't do it.

  An object of the present invention is to provide a setting information synchronization processing technique for synchronizing setting information held in each distributed server constituting a distributed server system in a distributed server system operated via a load balancing apparatus that manages load balancing. It is to be.

In order to achieve the above object, the present invention provides a distributed server system operated via a load balancer that manages load balancing, wherein each of the distributed servers holds a distributed server that constitutes the distributed server system. A program for functioning as a setting information synchronization device for synchronizing information, wherein the setting information synchronization device includes: 1) setting information storage means for storing the setting information; and 2) one of the distributed server system. Group information storage means for storing group information for designating a primary server and one or a plurality of secondary servers; 3) upon receiving a setting information setting request from the load balancer, Determining means for determining whether is designated as a primary server or a secondary server; ) Ru with the configuration information synchronization means.

The setting information synchronization means performs processing for notifying the setting request for the setting information to other secondary distributed servers when the server is the primary server, and storing the setting information in the setting information storage means, When the own server is a secondary server, a setting request for the setting information is notified to the primary server, and the setting information transferred from the primary server is stored in the setting information storage means .

  In the present invention, setting information and group information to be synchronized are stored in each distributed server constituting the distributed server system. The group information is information for setting one primary server and one or more secondary servers that are targets of load distribution in the distributed server system.

  When a client of the distributed server system transmits a setting request (or update request) for the setting information of the distributed server, the setting request by the load balancer operating the distributed server system is changed according to the load status at that time. It is distributed to one. The distributed servers that have been distributed determine whether the local server is designated as primary or secondary based on the group information stored in the group information storage means.

  As a result of the determination, if the server is primary, the setting information setting request is immediately distributed to all other secondary distributed servers (secondary servers), and the received setting information is stored in the setting information storage means.

  On the other hand, as a result of the determination, if the server is secondary, the setting information setting request is transferred to the primary distributed server (primary server) with reference to the setting information. The primary server receives the transferred setting information setting request and immediately distributes it to the other secondary servers. Then, the secondary server stores the setting information setting request received from the primary server in the setting information storage means.

  As described above, since the setting information setting request transmitted from the client is distributed to one of the distributed servers in the distributed server system by the load distribution device, it cannot be requested by specifying the distribution destination. Therefore, in the present invention, all setting information setting requests are once notified to the primary server, and then notified from the primary server to other secondary servers. As a result, even in the distributed server system operated by the load balancer, the setting information setting request (or update request) is notified to all the distributed servers set in the group information, and the setting information is synchronized. Can do.

Further, in the present invention, when the own server is a primary server, when the group information setting request is received, the group information setting request is notified to the other secondary server when the group information setting request is received. When the local server is a secondary server and receives the group information setting request, the group information setting request is notified to the primary server, and the group information transferred from the primary server is received. Ru and a group information synchronization means for performing a process of storing the group information storage means.

As a result, even when there is a change in the group configuration, the group information can be automatically distributed and synchronized.

  Thereby, for example, even when the configuration of the distributed server system is changed by adding a distributed server, the group information and the setting information can be synchronized immediately and automatically by distributing the information setting request. .

  According to the present invention, in the distributed server system operated via the load balancer, when the distributed server to which the setting information setting request is passed from the client-side application is the primary server, To the secondary server immediately. If the distributed server to which the setting information setting request is passed is a secondary server, the setting information setting request must be transferred to the primary server, and the setting information setting request is immediately sent from the primary server to another secondary server. Can be distributed to.

  Therefore, it is possible to automatically synchronize the setting information sent from the client, and it is possible to eliminate manual information setting / change processing such as setting of setting information at the time of introduction and change of setting information at the time of operation. . In particular, in a large-scale distributed server system, there is a significant effect in reducing the work load related to information synchronization.

  In addition, a setting information setting request can be received from a client without changing the operating environment of the load balancer. Therefore, the client can easily and flexibly change the setting information of the distributed server, and improvement in the usability of the distributed server system can be expected.

  In addition, since the changed information is immediately synchronized, it is not necessary to be aware of the mismatch in the environment settings of the distributed server system, so that the reliability of the information is improved.

  Further, according to the present invention, the group information setting request can be received not only by the primary server of the distributed server system but also by the secondary server. This allows the administrator to make a group information setting request without waiting for recovery of the primary server even when the load on the primary server is high or a communication error occurs. The degree is increased and the burden on the administrator can be reduced.

  FIG. 1 is a diagram showing a configuration example in the embodiment of the present invention.

  The Web server 1 (1a, 1b) is a computer that is a target of load distribution that constitutes the distributed server system 10 operated via the load distribution device 2.

  The load distribution device 2 receives a request to the distributed server system 10 transmitted from the Web client application 3 provided in the computer serving as the client, monitors the processing load of the Web server 1a and the Web server 1b, and processes the processing load. A device such as a computer or a router that distributes requests received to a Web server with a low level and manages load distribution.

  The Web client application 3 is provided in a computer used by a user of the distributed server system 10, and transmits a setting information setting request held by the Web servers 1a and 1b when the distributed server system 10 is installed or in operation. It is a program such as a Web browser that functions as processing means.

  The setting information is information held in all the Web servers 1 that are targets of load distribution in the distributed server system 10, and includes, for example, information as a host emulator such as a connection destination host name, screen configuration, display font, and macro. is there.

  The management tool 4 is a program that is provided in a computer as a client and functions as a processing unit that generates group information of the distributed server system 10 and transmits group information setting requests, synchronization requests, and the like to the Web servers 1a and 1b. .

  The group information is information that designates one primary server (Web server a) and one or a plurality of secondary servers (Web server b) as distributed servers constituting the distributed server system 10. In this example, it is assumed that the web server 1a = primary and the web server 1b = secondary are set in the group information.

  The web servers 1a and 1b include setting information synchronization processing units 11a and 11b, synchronization management units 13a and 13b, information storage units 15a and 15b, web server engines 17a and 17b, and CGI (Common Gateway Interface) 19a and 19b, respectively. . In the Web server 1a / 1b, setting information synchronization processing is realized by the setting information synchronization processing unit 11a / 11b and the synchronization management unit 13a / 13b.

  When receiving the group information setting request, the setting information synchronization processing unit 11a of the Web server 1a determines whether the own server is designated as primary or secondary based on the group information stored in the information storage unit 15a. This is a program that functions as a processing unit that notifies the web server 1b (secondary) of the received group information setting request and stores the received group information in the information storage unit 15a because the server itself is primary.

  The setting information synchronization processing units 11a and 11b are programs corresponding to interfaces such as CGI and ISAPI (Internet Server Application Program Interface).

  The synchronization management unit 13a is a program that manages the information synchronization processing state when the setting information synchronization processing unit 11a receives a group information setting request or receives a setting information setting request. Since the server itself is primary, the setting request for the received setting information is notified to the Web server 1b (secondary), and the setting information is stored in the information storage unit 15a. Further, the synchronization management unit 13a collectively transmits all the setting information stored in the information storage unit 15a to the Web server 1b (secondary) after setting the group information or in response to a request from the management tool 4.

  The information storage unit 15a is means for storing group information and setting information.

  The Web server engine 17a is a program that transmits a document in the Web server 1a described in HTML to the Web client application 3 in response to a request from the Web client application 3 via the HTTP protocol.

  The CGI 19a is a program that performs processing in response to an input from the Web client application 3. The CGI 19a notifies the synchronization management unit 13a of a setting information setting request. Moreover, you may perform the process which stores the received setting information in the information storage part 15a.

  The setting information synchronization processing unit 11b of the Web server 1b notifies the primary Web server 1a of the received group information setting request because the server itself is the secondary.

  Further, since the server itself is a secondary server, the synchronization management unit 13b notifies the primary Web server 1a of a setting request for the received setting information.

  First, the outline of the processing operation when there is a setting information change request from the Web client application 3 will be described with reference to FIGS. 1 and 2.

  Step S1: Information arrives from the Web client application 3 to the Web server 1. For example, during operation of the distributed server system 10, a setting information setting request is transmitted from the Web client application 3 to the load distribution apparatus 2 that operates the distributed server system 10 in order to change the setting of the distributed server. The load distribution apparatus 2 transmits a setting information setting request to a server having a low load among the distribution servers 1a and 1b.

  Step S3: It is determined whether or not the Web server that has received the setting information setting request is a primary server. The received setting information synchronization processing unit 11 of the Web server 1 refers to the group information in the information storage unit 15 and determines whether or not the own server is a primary server. If the local server is not the primary server, the process of step S5 is performed. If the local server is the primary server, the process of step S7 is performed.

  Step S5: Transfer the setting information to the primary server. The synchronization management unit 13 refers to the group information, identifies the primary Web server 1 (1a), and transfers a setting information setting request.

  Step S7: Information to be synchronized is transmitted to the secondary server (multitask process). The synchronization management unit 13 refers to the group information and transmits a setting information setting request to all of the secondary Web servers 1 (1b).

  In this way, regardless of which Web server 1 a setting information setting request from the Web client application 3 arrives at, it is always transferred to the distributed server 1a designated as the primary, and all the secondary distributions are transferred from the Web server 1a. The setting information is distributed to the server 1b, and the setting information is immediately synchronized.

  Next, the outline of the processing operation when there is a request for setting or changing group information from the client management tool 4 will be described with reference to FIG.

Step S1: Information arrives from the Web client application 3 to the Web server 1. For example, when the distributed server system 10 is introduced, a group information setting request designating a distributed server that is a target of load distribution is transmitted from the management tool 4 to the Web server 1a.
Step S3: It is determined whether or not the Web server that has received the group information setting request is a primary server. The received setting information synchronization processing unit 11 of the Web server 1 refers to the group information in the information storage unit 15 to determine whether or not the own server is a primary server. If it is not the primary server, the process of step S5 is performed. If it is a primary server, the process of step S7 is performed.

  Step S5: Transfer the setting information to the primary server. The setting information synchronization processing unit 11 refers to the group information, identifies the primary Web server 1 (1a), and transfers a setting information setting request.

  Step S7: Information to be synchronized is transmitted to the secondary server (multitask process). The setting information synchronization processing unit 11 refers to the group information and transmits the group information to all of the secondary Web servers 1 (1b).

  When the synchronization of the group information is completed, the synchronization management unit 13 generates a setting information batch file in which all the setting information in the information storage unit 15 is compressed, and transmits it to all the secondary Web servers 1 (1b). And the setting information is synchronized.

  As described above, the group information setting change is normally transmitted to the primary Web server 1a. However, even if a group information setting request arrives at the secondary Web server 1b, the change is always transferred to the primary Web server 1a. The group information is distributed from the Web server 1a to all the secondary distributed servers 1b, and the setting information is collectively synchronized.

  FIG. 3 shows an example of a screen for registering the distributed server 1 constituting the distributed server system 10.

  FIG. 3A is a diagram illustrating an example of a registration screen for individually registering the Web servers 1. The registration screen is provided with fields for inputting location information (URL) of the Web server 1 and designation of whether to operate as a primary or secondary server.

  FIG. 3B is a diagram illustrating an example of an editing screen for group information of a Web server registered on the registration screen of FIG. When the Web server 1 is selected from the group configuration list on the edit screen and the “add, delete, or change” button is selected, the management tool 4 adds or deletes the selected Web server 1 to the group information. Or the registered content is changed.

  When the “synchronization process” button is selected on the editing screen, the synchronization management unit 13a of the primary Web server 1a performs a batch synchronization process of setting information.

  FIG. 4 shows an example of group information. Each key type of the group information indicates that the four Web servers 1 of SV0 to SV3 constitute one group to be a load distribution target, and the Web server 1 of SV0 is designated as the primary.

  The meaning of each key type of group information is shown below.

[ServerGroup]: Settings related to groups
Count = number of servers to be synchronized
Primary = Specify the server number of the primary Web server,
[SVxx]: settings for each Web server,
URL = URL (real IP address) of the Web server specified in the section,
Enable = Specify presence / absence of synchronization (no synchronization (0), synchronization (1)),
Desc = Description of Web server (can be omitted),
GUID = information for uniquely identifying a Web server Hereinafter, a more detailed processing sequence of the invention in this embodiment will be described. Here, it is assumed that three Web servers are registered in the group information, and the Web server 1a is designated as primary and the Web servers 1b and 1c are designated as secondary.

  FIG. 5 is a sequence diagram when the Web server 1a (hereinafter, primary server a) receives a setting information setting request.

  (A) The CGI 19 of the primary server a receives a setting information setting request (upload request) from the Web client application 3. Then, the received setting information is stored in the information storage unit 15a, and the result “OK” is returned to the Web client application 3. The synchronization management unit 13 sets “synchronization flag = on”.

  FIG. 6A shows an example of an upload request, and FIG. 6B shows an example of a result response of the upload request. These data are transmitted by the HTTP protocol.

  The upload request in FIG. 6A is “cmd = server operation command, value example (upload), head = send / receive file name, file creation time, etc., from = sender (from Web client application 3) Value = none in transmission), data = binary data body (in this case, setting information data) ”. The result response of FIG. 6B is configured by “rsp = response indicating code = code indicating result (0 = normal, other = error code)”.

  It should be noted that by changing the description of cmd or head in the upload request, it is possible to cope with all server operations for synchronization such as file deletion and folder creation.

  (B) The CGI 19a passes a setting information upload request to the synchronization management unit 13a. When the synchronization management unit 13a receives the upload request, the CGI 19a responds with a result “acceptance”.

  The data configuration example of the upload request to the synchronization management unit 13a is the same as the data shown in FIG. 6, but an interprocess communication means such as a mail slot may be used for data transfer.

  (C) The synchronization management unit 13a refers to the group information in the information storage unit 15a, distributes an upload request for setting information to all the secondary Web servers 1b and 1c (hereinafter, secondary servers b and c), Perform immediate synchronization.

  The distribution destination secondary servers b and c refer to the group information in the information storage units 15b and 15c, respectively, and confirm that the request source is the primary server a in the same group based on the head of the received upload request. Then, the received setting information is stored in the information storage units 15b and 15c.

  When the transmission state “complete” is responded from the distribution destination secondary servers b and c, the synchronization management unit 13a of the primary server a sets the synchronization flag = off and returns to the normal operation state.

  FIG. 7 shows a data configuration example of the setting information distributed to the secondary server. The configuration of the setting information in FIG. 7 is the same as the data shown in FIG. 6, but the identification information of the primary server a is stored as “server” of the transmission source in “from” of the upload request.

  FIG. 8 is a sequence diagram when the secondary server c receives a setting information setting request.

  (A) The CGI 19 c of the secondary server c receives a setting information setting request (upload request) from the Web client application 3. The CGI 19c notifies the synchronization management unit 13c of the upload request. When the synchronization management unit 13c receives the upload request, the CGI 19c refers to the group information in the information storage unit 15c and transfers the received upload request to the primary server a.

  Upon receiving the transferred upload request, the CGI 19a of the primary server a stores the received setting information in the information storage unit 15a. Then, the result “OK” is returned to the secondary server c as the transmission source. The synchronization management unit 13a sets the synchronization flag = on.

  When receiving the result response from the primary server a, the synchronization management unit 13c of the secondary server c responds with the result “OK” to the Web client application 3.

  (B) The CGI 19a of the primary server a passes an upload request to the synchronization management unit 13a.

  (C) The synchronization management unit 13a refers to the group information, distributes the upload request to all the secondary servers b and c, and executes immediate synchronization. The secondary servers b and c refer to the group information stored in the information storage units 15b and 15c, confirm that the upload request is from the primary server a, and send the received setting information to the information storage units 15b and 15c. To store.

  Further, when the transmission status “completed” is responded from the distribution destination secondary servers b and c, the synchronization management unit 13a of the primary server a sets the synchronization flag = off and returns to the normal operation state.

  FIG. 9 is a sequence diagram when the primary server a receives a group information setting request.

  (A) The Web client management tool 4 requests GUIDs from all Web servers a, b, and c constituting the group. Each Web server a, b, c generates a GUID that can uniquely identify its own server based on the Mac address, the current time, etc., and responds to the management tool 4.

  (B) Thereafter, the management tool 4 generates and stores group information.

  (C) The setting information synchronization processing unit 11a of the primary server a receives a group information setting request (group information upload request) from the management tool 4.

  The received group information is referred to, the GUID of the primary server set in the group information is compared with the GUID of the own server, and if the GUID matches, the operation is performed as “primary”. Then, the synchronization management unit 13a sets “updating flag = on”. In addition, the setting information synchronization processing unit 11a stores the received group information in the information storage unit 15a, responds to the management tool 4 with the status “Updating”, and refers to the group information to the secondary servers b and c. Distribute group information.

  Secondary servers b and c store group information in information storage units 11b and 11c, respectively, and return a distribution response. When the setting information synchronization processing unit 11a of the primary server a receives the distribution response from the secondary servers b and c, the synchronization management unit 13 sets the in-synchronization flag = off and the processing is completed.

  The management tool 4 has a monitoring function. When the management tool 4 issues a synchronization status request (GetStatus), the management tool 4 responds with a status “updating”, and when the synchronization flag is off, it responds with a status “update complete”.

  As a response to the synchronization status request, for example, incomplete, synchronization completed, in synchronization, server setting update, invalid, error, etc. are set.

  FIG. 10 is a sequence diagram when the secondary server c receives a group information setting request.

  (A) The management tool 4 requests GUIDs from all the Web servers a, b, and c constituting the group. Each Web server a, b, c generates a GUID and responds to the management tool 4.

  (B) Thereafter, the management tool 4 generates and stores group information.

  (C) The setting information synchronization processing unit 11 c of the secondary server c receives a group information setting request (group information upload request) from the management tool 4. With reference to the received group information, the GUID of the group information is compared with the GUID of the own server, and if the own GUID is registered in the secondary, the operation is performed as “secondary”. Then, the setting information synchronization processing unit 11c transfers the received group information upload request to the primary server a with reference to the group information.

  The setting information synchronization processing unit 11a of the primary server a refers to the received group information, collates the GUID of the primary server set in the group information with the GUID of its own server, and when the GUID matches, “primary” As the operation. Then, the synchronization management unit 13a sets “updating flag = on”.

  In addition, the setting information synchronization processing unit 11a stores the received group information in the information storage unit 15a, responds to the management tool 4 with the status “Updating”, and responds to the secondary servers b and c specified in the group information. Distribute group information upload requests.

  The secondary servers b and c store the group information in the information storage units 15b and 15c, and return a distribution response. When the setting information synchronization processing unit 11a of the primary server a receives the distribution response from the secondary servers b and c, the synchronization management unit 13 sets the in-synchronization flag = off and the processing is completed.

  FIG. 11 is a sequence diagram when the setting information of the primary server a is synchronized in a lump.

  (A) When the synchronization processing button is selected on the screen shown in FIG. 3B and a synchronization request is transmitted from the management tool 4, the setting information synchronization processing unit 11a of the primary server a synchronizes the received synchronization request. It passes to the management unit 13a. The synchronization management unit 13 a responds with “acceptance” of the synchronization request, and the setting information synchronization processing unit 11 a transmits the synchronization response to the management tool 4. Further, the synchronization management unit 13a sets the in-synchronization flag to ON.

  The data structure of the synchronization request includes “cmd = syncreq” and designation of a secondary server to be synchronized.

  (B) The synchronization management unit 13a extracts and compresses all setting information stored in the information storage unit 15a to create a setting information image. Then, with reference to the group information, the secondary servers b and c specified by the synchronization request are acquired, and a setting information image synchronization request is transmitted to the acquired secondary servers b and c.

  FIG. 12A shows an example of a synchronization request, and FIG. 12B shows an example of a result response of the synchronization request. These data are transmitted by a predetermined protocol.

  The synchronization request in FIG. 12A includes “cmd = server operation command, value example (syncdata), head = transmission / reception file name, designation of file creation time, etc., from = transmission source information (primary server), data = setting information image data body ”. The result response of the synchronization request shown in FIG. 12B includes “rsp = response indicating code = result indicating code (0 = normal, other = error code)”.

  Receiving the synchronization request, the secondary servers b and c decompress the compressed setting information batch data, store them in the information storage units 15b and 15c, respectively, and send the synchronization “complete” to the primary server a. When the synchronization management unit 13a of the primary server “a” receives a response of “completion” from all the secondary servers to be synchronized, the synchronization flag is set to OFF and the normal operation state is switched.

  Note that after the group information upload request is made by the primary server a, the synchronization processing may be performed in the sequence of FIG. 11B.

  For example, when a new distributed server 1d is designated as the secondary and added to the group, a group information setting request to which the setting of the distributed server 1d (secondary server d) is added is transmitted from the management tool 4 to the primary server a. Then, the primary server a distributes the group information according to the sequence (a) to (c) shown in FIG. 9, and immediately thereafter performs the sequence (b) in FIG. Since the synchronization status of the secondary servers b and c already registered in the group is “complete” and the synchronization status of the newly added secondary server d is “not implemented”, the primary server a Synchronization processing is performed with the secondary server d whose status is “not implemented” as a synchronization target.

  As described above, according to the present invention, it is possible to automatically synchronize the setting information transmitted from the Web client application 3, and automatically perform setting and updating of the group information and synchronization of the setting information associated therewith. be able to. In addition, since the changed information is immediately synchronized, it is not necessary to be aware of the mismatch in the environment settings of the distributed server system, so that the reliability of the information is improved.

  As mentioned above, although this invention was demonstrated by the embodiment, it cannot be overemphasized that a various deformation | transformation is possible for this invention in the range of the main point.

  Further, although the present invention has been described as being implemented as a processing program that is read and executed by a computer, the processing program that implements the present invention is a computer-readable portable medium memory, semiconductor memory, hard disk, etc. It can be stored in an appropriate recording medium, provided by being recorded on these recording media, or provided by transmission / reception using various communication networks via a communication interface.

  The features of the embodiments and examples of the present invention are listed as follows.

(Supplementary Note 1) In a distributed server system operated via a load balancer that manages load balancing, a setting information synchronization device that synchronizes the setting information held by each of the distributed servers with the distributed server that constitutes the distributed server system Is a program for functioning as
The setting information synchronization device includes:
Setting information storage means for storing the setting information;
Group information storage means for storing group information for designating one primary server and one or more secondary servers constituting the distributed server system;
When receiving a setting information setting request from the load balancer, based on the group information, determining means for determining whether the local server is designated as a primary server or a secondary server;
When the local server is a primary server, it comprises setting information synchronization means for notifying a setting request for the setting information to another secondary distributed server and storing the setting information in the setting information storage means. Setting information synchronization program.

(Supplementary note 2) In the setting information synchronization program described in the supplementary note 1,
The setting information synchronization device includes:
When the own server is a primary server, when receiving the group information setting request, the group information synchronization request for notifying the group information setting request to another secondary server and storing the group information in the group information storage means And a setting information synchronization program.

(Supplementary note 3) In the setting information synchronization program described in the supplementary note 2,
When the group information synchronization unit detects a secondary server that does not hold the same setting information as the setting information held by the primary server based on the group information requested for setting, the detected secondary server A setting information synchronization program for transferring all setting information stored in the setting information storage means of the own server.

(Supplementary Note 4) In a distributed server system operated via a load distribution device that manages load distribution, a setting information synchronization device that synchronizes the setting information held by each of the distributed servers with the distributed server that constitutes the distributed server system Is a program for functioning as
The setting information synchronization device includes:
Setting information storage means for storing the setting information;
Group information storage means for storing group information for designating one primary server and one or more secondary servers constituting the distributed server system;
When receiving a setting information setting request from the load balancer, based on the group information, determining means for determining whether the local server is designated as a primary server or a secondary server;
When the local server is a secondary server, it comprises a setting information synchronization means for notifying the primary server of a setting request for the setting information and storing the setting information transferred from the primary server in the setting information storage means. Setting information synchronization program.

(Supplementary Note 5) In the setting information synchronization program according to Supplementary Note 4,
The setting information synchronization device includes:
When the local server is a secondary server and receives the group information setting request, it notifies the primary server of the group information setting request and stores the group information transferred from the primary server in the group information storage means And a group information synchronization means for performing the setting information synchronization program.

(Supplementary Note 6) In a distributed server system that operates via a load balancer that manages load balancing and performs setting information synchronization processing that synchronizes setting information held by each of the distributed servers that constitute the system. A program for functioning a computer as an administrator client,
The administrator client is
Group information setting means for generating group information designating one primary server and one or a plurality of secondary servers constituting the distributed server system, and transmitting the group information to any distributed server of the distributed server system An administrator client program characterized by comprising:

(Supplementary note 7) In the administrator client program described in the supplementary note 6,
A setting information synchronization request for transferring all setting information stored in the setting information storage means of the primary server to a secondary server that does not hold the same information as the setting information held by the primary server. An administrator client program characterized by comprising synchronization request means for transmitting to an administrator.

(Supplementary Note 8) In a distributed server system that performs a setting information synchronization process that synchronizes setting information held by each distributed server that constitutes the system, the system being operated via a load balancing device that manages load balancing. A program for functioning a computer as an administrator client,
The administrator client is
An administrator client program comprising setting information setting means for transmitting a request for setting or updating setting information held in the distributed server to the distributed server system.

(Supplementary Note 9) In a distributed server system operated via a load balancer that manages load distribution, setting information synchronization processing for synchronizing setting information held by each of the distributed servers with the distributed server that constitutes the distributed server system A method,
When the distributed server receives a setting information setting request via the load balancer, the distributed server automatically determines, based on group information that specifies one primary server and one or more secondary servers that constitute the distributed server system. A process of determining whether the server is designated as a primary server or a secondary server;
As a result of the determination process, when the local server is the primary server, the setting information setting request is notified to another secondary server, or when the local server is the secondary server, the setting information setting request is primary. The process of notifying the server;
A setting information synchronization processing method comprising: storing the setting information requested to be set in the setting information storage means.

It is a figure which shows the structural example in embodiment of this invention. It is a figure for demonstrating the outline | summary of the processing operation of this invention. It is a figure which shows the example of a screen for registering a distributed server. It is a figure which shows the example of group information. It is a sequence diagram when a primary server receives a setting information setting request. It is a figure which shows the example of an upload request, and the example of a result response. It is a figure which shows the data structural example of the setting information distributed to a secondary server. It is a sequence diagram when the primary server c receives a setting information setting request. FIG. 11 is a sequence diagram when the primary server a receives a group information setting request. FIG. 11 is a sequence diagram when the secondary server c receives a group information setting request. It is a sequence diagram in the case of collectively synchronizing the setting information of the primary server a. It is a figure which shows the example of a synchronous request | requirement, and the example of a result response.

Explanation of symbols

1a, 1b Web server 11a, 11b Setting information synchronization processing unit 13a, 13b Synchronization management unit 15a, 15b Information storage unit 17a, 17b Web server engine 19a, 19b CGI
DESCRIPTION OF SYMBOLS 10 Distributed server system 2 Load distribution apparatus 3 Web client application 4 Management tool

Claims (2)

In a distributed server system operated via a load distribution device that manages load distribution, in order to cause the distributed server that constitutes the distributed server system to function as a setting information synchronization device that synchronizes setting information held by each of the distributed servers The program of
The setting information synchronization device includes:
Setting information storage means for storing the setting information;
Group information storage means for storing group information for designating one primary server and one or more secondary servers constituting the distributed server system;
When receiving a setting information setting request from the load balancer, based on the group information, determining means for determining whether the local server is designated as a primary server or a secondary server;
When the own server is a primary server, the setting information setting request is notified to other secondary distributed servers, and the setting information is stored in the setting information storage means . The own server is the secondary server A setting information synchronization means for performing a process of notifying a setting request for the setting information to a primary server and storing the setting information transferred from the primary server in the setting information storage means. Synchronous program. In the setting information synchronization program according to claim 1,
The setting information synchronization device includes:
If the local server is the primary server, when receiving the setting request of the group information, the setting request of the group information notified to another secondary server performs a process of storing the group information in the group information storage means When the own server is a secondary server and receives the group information setting request, the group information setting request is notified to the primary server, and the group information transferred from the primary server is stored in the group information storage means. A setting information synchronization program comprising group information synchronization means for performing a storing process.

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