JP2011043888A - Information processing apparatus, method and system, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more rapidly perform recovery processing for failure in a state that consistency in a database between bases is maintained in part, in an ACT-ACT configuration. <P>SOLUTION: When a latest high-priority information recovery part 104 obtains request contents of a high-priority request and high-priority information from an information processing apparatus B120 and stores (restores) them into an information storage part 101, a service provision start part 105 starts service provision processing to a client 140. By the start of the service provision processing, the information processing apparatus A100 receives a service request from the client 140, and provides a service corresponding to the received request to the client 140. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information processing apparatus, method, system, and program for recovering each piece of information managed between different sites.

  In communication infrastructure back-end systems that are required to continue providing services 24 hours a day, 365 days a year, systems are generally constructed at two or more locations that are sufficiently distant from each other in the event of a catastrophic disaster. To ensure availability. As a result, even when a system at a certain base stops, a system at another base processes a request from a client, thereby enabling continuous service provision.

  In the above-described information system constructed at a plurality of bases, at the time of operation, only one base is in an active state and other bases are in a standby state (ACT-SBY configuration), and all bases are in an active state. (ACT-ACT configuration).

  In general, when frequently updating the contents of a database held by the system, an ACT-SBY configuration is often used. For example, in the technique described in Non-Patent Document 1, the primary database and the standby database are synchronized by performing an update process performed on the primary database also on a standby database constructed at another base. With this technology, recovery in the event of a failure of the primary database can be performed without stopping the system.

  On the other hand, in a system in which the main usage is a database reference, an ACT-ACT configuration is often used. This is because, in the ACT-ACT configuration in which the database is updated at each site, the response performance generally required is maintained while maintaining the integrity of each database between sites constructed at sites that are sufficiently separated geographically. This is because it is difficult to put out.

  However, the ACT-SBY configuration has the following problems. In the ACT-SBY configuration, when an abnormality in an active base is detected, one of the standby bases is activated for the first time. For this reason, if an abnormality is detected, the other site is not immediately operational, and a certain amount of time is required for the transition of the active site to the standby state and the transition of the standby state to the active state of the other site. Take it. Therefore, for example, if the network between the base and the client that are in the active state is temporarily disconnected, the request from the client is not accepted during the period until the base that can communicate with the client in the standby state is shifted to the active state. It cannot be processed.

  Even in the technology of Non-Patent Document 1, since the standby database is normally in a standby state, if the service cannot be provided in the primary database due to a temporary interruption of the communication path between the primary database and the client, the standby database is immediately Cannot switch processing.

  On the other hand, a technique has been proposed in which information stored in a database is classified according to the priority of recovery, and the recovery time of information to be recovered with the highest priority is shortened. However, in this proposal, only the recovery order of information is changed at the time of failure recovery in the ACT-SBY configuration. In the ACT-ACT configuration, there is a proposal of a technique for restarting the processing of the failure side base more quickly. It has not been.

http://otndnld.oracle.co.jp/products/database/oracle10g/availability/htdocs/availability/DataGuardOverview.html, Oracle Data Guard, ORACLE TECHNOLOGY NETWORK.

  As described above, the ACT-SBY configuration has a problem of low availability when an abnormality occurs. On the other hand, in the case of the ACT-ACT configuration, even if an abnormality occurs in the accessed base, the client detects a no-response timeout and autonomously switches the transmission destination of the request to another base. This makes it possible to increase availability. However, in the case of the ACT-ACT configuration, there is a trade-off between maintaining the consistency of the database between the bases and the response performance of the system, and it is easy to perform faster processing while maintaining high consistency. There is a problem that is not.

  The present invention has been made in order to solve the above-described problems. In the ACT-ACT configuration, for example, recovery processing in an abnormal state or the like can be performed in a state where database consistency between bases is maintained to some extent. The purpose is to be able to do it quickly.

  The information processing apparatus according to the present invention is an information processing apparatus for recovering information, and is not included in the information for recovery of the request content of the high priority request and the high priority information in the request from the client received via the network. The latest high-priority information recovery means that obtains the latest information from other bases connected via the network and stores it in the information storage unit, and this latest high-priority information recovery means After storing the priority information in the information storage unit, service provision start means for starting service provision processing using information stored in the information storage unit for the client, and the service provision start means starts service provision processing After that, the latest information that is not in the recovery information of the request contents of the low priority request and the corresponding low priority information in the request received from the client The latest low priority information recovery means that is acquired from another base and stored in the information storage unit, the high priority information corresponds to a preset high priority information classification, , Which corresponds to the classification of preset low priority information, the high priority request is the information required for processing the received request is classified as high priority information, and the low priority request is accepted Information required for request processing is classified as low priority information.

  In the information processing apparatus, service provision stop means for stopping service provision processing in response to a request from a client received via a network, and stored in advance after the service provision stop means stops service provision processing. Self-storing information recovery processing means for recovering information for recovery to the information storage unit, and the latest high priority information recovery means is the latest after the information for recovery is stored in the information storage unit by the information recovery processing means. This information may be acquired from another base connected via the network and stored in the information storage unit.

  The information processing apparatus may further include request information sending means for taking out requested information from the information storage unit and sending it to the requesting other site in response to a request from another site.

  An information processing system according to the present invention includes a first information processing apparatus that is disposed at its own base and restores information, and a second information processing apparatus that is disposed at another base connected via a network. 1 The information processing apparatus connects the latest information that is not included in the restoration information of the request content of the high priority request and the high priority information in the request from the client received via the network via the network. The latest high priority information recovery means that is acquired from another base and stored in the information storage unit, and the latest high priority information recovery unit stores the request content of the high priority request and the high priority information in the information storage unit, and then the client Service provision start means for starting service provision processing using information stored in the information storage section for the service, and the service provision start means has started service provision processing The latest low-priority information obtained from other bases and stored in the information storage unit of the latest low-priority request content and corresponding low-priority information that is not included in the recovery information. And a second information processing apparatus that retrieves requested information from an information storage unit included in the second information processing apparatus in response to a request from the first information processing apparatus, and that requests the first information processing apparatus. Request information sending means for sending to the user, the high priority information corresponds to a preset high priority information classification, and the low priority information corresponds to a preset low priority information classification. Corresponding, high-priority requests are those in which information required to process accepted requests is classified as high-priority information, and low-priority requests are classified as low-priority information in information required to process accepted requests. Be done Than is.

  In the information processing system, the first information processing apparatus stops service providing processing for stopping a service providing process in response to a request from a client received via the network, and the service providing stopping means stops the service providing process. And a self-stored information recovery processing means for recovering previously stored recovery information to the information storage section, and the latest high priority information recovery means uses the information recovery processing means to restore information to the information storage section. Is stored, the latest information may be acquired from another base connected via the network and stored in the information storage unit.

  In addition, the information processing method according to the present invention provides the latest information that is not included in the recovery information of the request content of the high priority request and the high priority information in the request from the client received via the network. The latest high-priority information recovery step that is acquired from another base connected via the information storage unit and stored in the information storage unit, and the request content and high-priority information of the high-priority request are stored in the information storage unit, and then the information storage unit for the client The service provision start step for starting the service provision process using the information stored in the client, the request content of the low priority request in the request received from the client after the service provision process is started, and the corresponding low The latest low priority information recovery step of acquiring the latest information of the priority information that is not included in the recovery information from other sites and storing it in the information storage unit is reduced. The high priority information corresponds to a preset high priority information classification, and the low priority information corresponds to a preset low priority information classification. The information required for processing the received request is classified as high-priority information, and the information required for processing the received request is classified as low-priority information.

  In the information processing method, in response to a request from a client received via a network, a service provision stop step for stopping the service provision processing, and after the service provision stop step stops the service provision processing, the service provision processing is stored in advance. A self-storing information recovery processing step for recovering the recovery information stored in the information storage unit. In the latest high priority information recovery step, after the information for recovery is stored in the information storage unit by the information recovery processing step, the latest information is restored. This information may be acquired from another base connected via the network and stored in the information storage unit. In addition, a request information sending step may be provided in which requested information is extracted from the information storage unit and sent to the requesting other site in response to a request from another site.

  The program according to the present invention causes a computer to realize the information processing method described above.

  As described above, according to the present invention, the latest information that is not included in the recovery information of the request content of the high priority request and the high priority information is acquired from another base connected via the network. After recovering to the information storage unit, we started processing to provide services to clients, so that the recovery processing in the event of an abnormality can be performed more quickly while maintaining a certain level of database consistency between bases. Excellent effect is obtained.

It is a block diagram which shows the structure of the information processing system in Embodiment 1 of this invention. It is a flowchart explaining the operation example of information processing apparatus A100. It is a block diagram which shows the structure of the information processing system in Embodiment 2 of this invention. It is a block diagram which shows the structure of the information processing system in Embodiment 3 of this invention. FIG. 10 is a sequence diagram for explaining the normal operation of the system in the third embodiment. FIG. 10 is a sequence diagram illustrating an operation when a communication path of a system in Embodiment 3 is temporarily disconnected. FIG. 10 is a sequence diagram for explaining an operation at the time of system restoration in the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1]
First, Embodiment 1 of the present invention will be described. FIG. 1 is a configuration diagram showing the configuration of the information processing system in the present embodiment. This system includes an information processing apparatus A100 and an information processing apparatus B120, and these are connected to a client 140 via a network 130. Note that, here, a case where two information processing devices are provided is shown, but the same applies even if three or more information processing devices are provided.

  The information processing apparatus A100 includes an information storage unit 101, a service provision stop unit 102, a self-saved information restoration processing unit 103, a latest high priority information restoration unit 104, a service provision start unit 105, a latest low priority information restoration unit 106, and request information. A sending unit 107 is provided. The information processing apparatus B120 has the same configuration.

  The service provision stop unit 102 stops a service provision process for a request from the client 140 using information stored in the information storage unit 101 when the information processing apparatus A100 fails. When the service provision stop unit 102 detects the occurrence of a failure at the local site, the service provision stop unit 102 stops the service provision process.

  When the service provision stop unit 102 stops the service provision process, the self-saved information restoration processing unit 103 stores (restores) information for restoration stored (backed up) in the information storage unit 101 in advance. For example, the self-saved information restoration processing unit 103 stores the preliminary information of the information storage unit 101 in units of one day, and the state of the information storage unit 101 is restored to the state up to one day before the occurrence of the failure by the restoration process. To do. Note that the storage device being backed up may be included in the information processing apparatus A100, or may be included in another apparatus connected to the information processing apparatus A100. Further, the storage device being backed up may be provided in another information processing apparatus connected to the information processing apparatus A100 via the network 130.

  The latest high-priority information restoration unit 104 receives the latest information that is not included in the recovery information from the request contents of the high-priority request and the high-priority information from the information processing apparatus B120 (request information transmission unit) serving as another base. Obtained and stored in the information storage unit 101. The high priority information corresponds to a preset classification of high priority information, and the high priority request is information in which information required for processing the received request is classified as high priority information. The latest high priority information restoration unit 104 stops the service provision process by the service provision stop unit 102 and stores the information for restoration in the information storage unit 101 by the information dissemination processing unit 103. Recover information. The high priority request is received from the client 140. In addition, when three or more information processing apparatuses are provided, information may be acquired from any information processing apparatus other than its own base.

  When the latest high priority information restoration unit 104 acquires the request content of the high priority request and the high priority information from the information processing apparatus B120 and stores (restores) the information in the information storage unit 101, the service provision start unit 105 Start the provision process. By starting the service providing process, the information processing apparatus A100 receives a service request from the client 140 and provides the client 140 with a service corresponding to the received request.

  The latest low-priority information restoration unit 106 transmits the latest information that is not included in the information for restoration among the request contents of the low-priority request and the corresponding low-priority information to the information processing device B120 (request information sending unit) ) And stored in the information storage unit 101. The low priority information corresponds to the classification of preset low priority information, and the low priority request is information in which information required for processing the received request is classified as low priority information. For example, in the latest low priority information restoration unit 106, as described above, the latest high priority information restoration unit 104 acquires and restores the latest information corresponding to the high priority request from the information processing apparatus B120, and the service provision start unit 105 When the service providing process starts, the new low priority information restoration process described above is performed. The timing of the recovery process may be associated with the service providing process, or the recovery process may be performed in parallel or independently (such as when idle). Further, when three or more information processing devices are provided, target information may be acquired from any information processing device other than its own base.

  The request information sending unit 107 retrieves requested information from the information storage unit 101 in response to a request from another site such as the information processing device B120, and sends the requested information to the other site (information processing device B120) of the request source.

  Next, an operation example of the information processing apparatus A100 will be described using the flowchart of FIG. For example, it is detected that a failure has occurred, and the service provision stop unit 102 starts a service provision stop process. As a result, when the service provision is stopped (step S201), the self-saved information recovery processing unit 103 recovers the recovery information stored in advance in the information storage unit 101 (step S202). For example, the self-saved information recovery processing unit 103 backs up the information stored in the information storage unit 101 to a well-known magnetic tape on a daily basis. The self-saved information restoration processing unit 103 restores this backup information to the information storage unit 101. With this processing, the information storage unit 101 is restored to the state up to one day before the failure occurred.

  When the restoration of the partial information by the self-stored information restoration processing unit 103 is completed (step S203), the latest high priority information restoration unit 104 does not exist in the restoration information described above, for example, the high priority request received on the day Request information and corresponding high priority information are acquired from the information processing apparatus B120 and recovered (step S204). The request from the latest high priority information restoration unit 104 is accepted by the request information sending unit of the information processing device B120, and the request information sending unit of the information processing device B120 that accepts this request sends the target information to the information processing device A100. Is sent to. As a result, the latest high priority information restoration unit 104 can acquire necessary information. As a result of the processing of the high priority information recovery processing unit 104, the request contents of all the high priority requests and the corresponding high priority information received up to the point when the latest high priority information recovery unit 104 requests the information processing apparatus B120 are information The storage unit 101 is restored.

  Next, when the process of acquiring and restoring the latest information on the high priority request from the other base described above is completed (step S205), the service provision start unit 105 starts providing various services (step S206).

  When the service provision is resumed in this way, in step S207, the latest low priority information restoration unit 106 is not stored in the current information storage unit 101 from the information processing apparatus B120 which is another site. Get the contents of the low priority request and the corresponding low priority information. The request from the latest low priority information restoration unit 106 is accepted by the request information sending unit of the information processing device B120, and the request information sending unit of the information processing device B120 that accepts this request sends the target information to the information processing device A100. Is sent to. As a result, the latest low priority information restoration unit 106 can acquire necessary information.

  For example, as described above, when the self-saved information recovery processing unit 103 recovers the information storage unit 101 with the information backed up in units of one day, the latest low priority information recovery unit 106 The contents of the accepted low priority request and the corresponding low priority information are acquired from the information processing apparatus B120 as described above and stored in the information storage unit 101.

  The information processing apparatus is a computer device including a CPU, a main storage device, an external storage device, a network connection device, and the like. Each function described above is performed by the CPU operating by a program developed in the main storage device. Is realized. Each function may be distributed among a plurality of computer devices.

  As described above, according to the present embodiment, the latest high priority information restoration unit 104 and the latest low priority information restoration unit 106 are provided, and immediately after the information corresponding to the high priority request is restored, the service is provided. (Request acceptance) has started, and for low priority information, for example, recovery (synchronization) is performed in parallel with the processing of a new service request, so that the consistency of the information base between the bases is maintained to some extent As a result, recovery processing in the event of an abnormality can be performed more quickly. Thus, the present invention is characterized by including the latest high priority information restoration unit 104 and the latest low priority information restoration unit 106.

[Embodiment 2]
Next, a second embodiment of the present invention will be described. FIG. 3 is a configuration diagram showing the configuration of the information processing system in the present embodiment. This system includes a site A server 300 and a site B server 320, and these are connected to a client 340 via a network 330.

  The site A server 300 includes a database (information storage unit) 301, an access request processing unit 302, an access request stop unit (service provision stop unit) 303, a database update unit 304, another site database update unit 305, and a high priority request content holding unit. 306, a low priority information synchronization unit (latest low priority information restoration means) 307. The base B120 has the same configuration.

  The database 301 includes a general database management system (DBMS), and does not require an advanced synchronization function. The access request processing unit 302 processes a low priority request and a high priority request from the client 340 and returns a processing result to the client 340. The access request stop unit 303 stops processing of low priority requests and high priority requests from the client 340. The access request stop unit 303 stops only low priority requests, only high priority requests, or all requests.

  The database update unit 304 updates the database 301 of its own site (site A server 300) as a result of processing the low priority request and the high priority request from the client 340. However, only the low priority information may be updated for the low priority request, while the high priority information and the low priority information may be updated for the high priority request.

  The other site database update unit 305 updates the database of the site B server 320 which is the other site as a result of processing the low priority request and the high priority request from the client 340. As for the low priority information, after updating the local site database 301, a response to the access request from the client 340 is transmitted without confirming the completion of the database update of the site B server 320.

  For example, after the other site database update unit 305 updates the database 301 with respect to the low priority information, the site B server 320 requests the site B server 320 to update the low priority information. In the site A server 300, the access request processing unit 302 starts accepting an access request from the client 340 without confirming the completion. In addition, after updating the database 301 for the low priority information, in the site A server 300, the access request processing unit 302 starts accepting an access request from the client 340. Thereafter, the site A server 300 requests the site B server 320 to update the low priority information.

  As described above, the response performance of the access request processing unit 302 can be improved. On the other hand, high-priority information can improve consistency between bases by performing, for example, two-phase commit on the databases of both bases.

  In the two-phase commit, first, the site A server 300 inquires of the site B server 320 (including all other sites) whether the commit (confirmation of update processing) can be executed. In response to this inquiry, the site that is ready for update returns a response of “Ready”. Upon confirming that “preparation complete” responses have been obtained from all the bases, the base A server 300 notifies the start of confirmation of the update process, and simultaneously rewrites the information storage units of other bases. If an abnormality occurs in any of the bases during rewriting, the base where the abnormality has occurred notifies the failure, and the base A server 300 notifies all the bases of the processing withdrawal and restores the information. Notify to perform “rollback” processing.

  Next, the high-priority request content holding unit 306 holds the request content of the high-priority request requested from the client 340 as a high-priority request file for a certain period of time, and the base B server 320 (high-priority request content holding unit) ) And hold mutually high priority request files.

  The low priority information synchronization unit 307 reflects information, which is newer than the contents of the database 301 of the site A server 300, in the database 301 among the low priority information existing in the database of the site B server 320. The client 340 is a general application server, and makes a large number of low priority requests and a small number of high priority requests to the site A server 300 and the site B server 320, for example.

[Embodiment 3]
Next, a third embodiment of the present invention will be described. FIG. 4 is a configuration diagram showing the configuration of the information processing system in the present embodiment. This system includes a base A 400 and a base B 430, which are connected to the authentication client 450, the operation server 460, and the user terminal 470 via the IP network 470. The site A 400 includes an authentication server 401, an SO processing server 411, and a database 419, and the site B 420 includes an authentication server 421, an SO processing server 431, and a database 439.

  The authentication server 401 includes an authentication unit 402, a session information update unit 403, another site session information update unit 404, and a request stop unit 405.

  The authentication unit 402 authenticates the authentication request transmitted from the authentication client 450 based on service order (SO) information registered in the database 419 at the local site. The session information registration unit 403 stores the attribute information of the user session (session established with the user terminal 470) generated when the authentication unit 402 authenticates (when authentication is successful) as session information in the database 419. sign up. The other site session information update unit 404 registers the session information in the database 439 of the site B42 which is another site. The request stop unit 405 stops the authentication process, and discards the authentication request transmitted from the authentication client 450 when the authentication process is stopped.

  The session information is information used by the administrator for the purpose of grasping the connection state of the user with the user terminal 470 and for the purpose of preventing multiple logins of the same user. The requirement for consistency is low, and it is allowed to be inconsistent between the database 419 and the database 439 temporarily. For this reason, the session information is set as low priority information, and the authentication request is specified as a low priority request because session information that is low priority information is required to process this request. Note that the authentication request may be set as a low priority request. In other words, a low priority request may be set in advance. On the other hand, the SO information is set as high-priority information to be used for user authentication authorization in the user terminal 470, as will be described later. Therefore, the SO request is specified as high priority information. In this case as well, the SO request may be set as a high priority request. In addition, a high priority request may be set in advance.

  The SO processing server 411 includes an SO request processing unit 412, a reserve unit 413, a high priority request content holding unit 414, an SO processing stop unit 415, and a low priority information synchronization unit 416.

  The SO request processing unit 412 processes the SO request transmitted from the operation server 460 and registers the processed SO information in the database 419. The spare unit 413 periodically acquires the information stored in the database 419 to a tape medium and keeps it as a database spare. The high-priority request content holding unit 414 stores the SO request SO file processed by the SO request processing unit 412 in its own local storage for a certain period of time, and stores the SO file stored for a certain period of time in the base B 420 (SO processing Server 431).

  One SO file is generated for one SO request. However, when a plurality of request types are included in one SO request, a plurality of request types are registered in the SO file. The request types include “user registration”, “user change”, “user deletion”, “session information reference”, and the like.

  Further, when receiving a request for sending an SO file from another site, the high priority request content holding unit 414 sends the stored SO file to the other site from which the request is made. This SO file becomes the difference between the above-mentioned database reserves, and the SO information in the database 419 can be restored by using the database reserve and the SO file.

  The SO processing stop unit 415 stops the SO request processing (SO processing) performed by the SO request processing unit 412 and discards the SO request transmitted from the operation server 460 while the SO processing is stopped. The low priority information synchronization unit 416 synchronizes session information between the database 439 at the base B 420 and the database 419 at the local base (base A 400). The low priority information synchronization unit 416 synchronizes session information when a failure is recovered.

  The database 419 includes a general database management system (DBMS), a storage serving as an information storage unit, and the like. Further, the database 419 has a function of temporarily stopping the update from the authentication server 421 and the SO processing server 431 of the base 420 which is another base.

  The authentication server 421, the SO processing server 431, and the database 439 at the site B420 are the same as the authentication server 401, the SO processing server 411, and the database 419 at the site A400 described above.

  The authentication client 450 is a general-purpose server device that transmits a user authentication request to the authentication servers 401 and 421 in order to provide a communication service such as a VPN connection to the user terminal 470. The authentication client 450 has a function of automatically switching the transmission destination of the authentication request to the authentication server 421 of the base B 420 when there is no response when the authentication request is transmitted to the authentication server 401 of the base A 400 serving as the primary.

  The operation server 460 is a general-purpose server device that requests the SO processing servers 411 and 431 as an SO request to register information used for user authentication authorization such as a user name and password of the user terminal 470 to be connected to the system. . The operation server 460 transmits the SO file describing the SO information to the SO processing servers 411 and 431. In addition, the operation server 460 normally requests an SO request from the SO processing server 411 of the base A 400 that is the primary, and if there is no response to the request for a certain period of time, the operation server 460 automatically The transmission destination is switched to the SO processing server 431.

  Next, the operation of the information processing system in the present embodiment will be described.

  First, normal operation will be described with reference to the sequence diagram of FIG. First, in step S501, the operation server 460 makes an SO request including an SO file to the SO processing server 411 at the site A400. In step S502, the SO request processing unit 412 of the SO processing server 411 that has received the SO request registers the SO information in the database 419. In step S503, the SO request processing unit 412 of the SO processing server 411 registers the SO information in the database 439 of the base B420 that is another base.

  At this time, if the site B 420 has not failed, a two-phase commit is performed to maintain the consistency of the SO information in the databases at both sites. When the base B420 is out of order, only the database 419 of the base A400 is updated based on the in-failure flag set by the maintenance person.

  Thereafter, in step S504, in the SO processing server 411, the SO request processing unit 412 returns an SO response to the operation server 460. In step S505, the high priority request content holding unit 414 is processed by the SO request processing unit 412. The SO file of the SO request is stored in its own local storage for a certain period of time, and the SO file stored for a certain period of time is transmitted to the base B 420 (SO processing server 431).

  In step S506, the authentication client 450 transmits an authentication request including information for specifying the user to be authenticated to the authentication server 411 at the site A 400 using a protocol such as “RADIUS”. In the authentication server 401 that has received the authentication request, in step S507, the authentication unit 402 refers to the database 419 for the password of the user to be authenticated registered as SO information, and in step S508, the SO information is stored in the database 419. Obtain and authenticate from. Note that the processing up to step S505 and the processing after step S506 need not be performed in this order, and need not be a series of operations.

  If this authentication result is OK, in step S509, the session information update unit 403 uses the user login time (authentication processing time) and attribute information (for example, IP address) set for the authenticated user as session information in the database. Register at 419. If the update of the database 419 is successful in this registration process, the authentication unit 402 of the authentication server 401 returns an authentication response to the authentication client 450 in step S510. Thereafter, in step S511, the other site session information update unit 404 asynchronously registers the session information in the database 439 of the site B 420 as well.

  In this way, by returning the authentication response before the completion of the writing process to the database at another base which takes a relatively long time, the processing performance of the authentication response can be improved. As shown in steps S512 to S517 of FIG. 5, the behavior is the same even when the authentication client 450 makes an authentication request to the authentication server 421 at the site B420.

  Next, the operation when the communication path is temporarily disconnected will be described with reference to the sequence diagram of FIG.

  As shown in steps S601 to S603, after the authentication client 450 transmits an authentication request to the authentication server 401 at the site A400, if there is no response for a certain period of time, it is retransmitted to the authentication server 401 at the site A400. I do. If there is no response after such retransmission, an authentication request is transmitted to the authentication server 421 at the site B 420 as shown in step S604. The operations in steps S605 to S609 after the authentication is requested are the same as the operations in steps S507 to S511 described above. This behavior is the same for the SO request of the operation server 460.

  Next, the operation at the time of recovery will be described using the sequence diagram of FIG. Hereinafter, a recovery procedure when the contents of the database 419 are completely lost due to a failure occurring at the site A400 will be described. As a precondition, first, it is assumed that the base A400, which is the base where the failure occurred, has completed the physical recovery of the apparatus and has not recovered (synchronized) only the information in the database 419. Information in the database 419 is regularly backed up to a tape medium. Further, it is assumed that the SO file input after the latest tape backup is acquired is stored in the SO processing server 431 (high priority request content holding unit) at the base B 420.

  First, in step S701, the request stop unit 405 and the SO processing stop unit 415 stop the respective receiving processes in the authentication server 401 and the SO processing server at the site A 400. The request stop unit 405 stops the authentication request acceptance process, and the SO process stop unit 415 stops the SO request acceptance process. Further, the database 419 stops accepting update processing from the authentication server 431 and the SO processing server 421 at the site B 420.

  Next, in step S702, information is registered in the database 419 of the site A 400 using tape backup. The tape backup may be prepared at the base B420, for example, or may be transferred from the base B420 to the base A400 via a network. The backup destination may be a tape or a storage medium other than a tape.

  Next, for example, upon completion of information registration from the backup, the process proceeds to step S703 automatically or manually, and the SO processing server 411 at the base A400 applies the tape applied to the SO processing server 420 at the base B420. A request is made to send an SO file that is newer than the backup acquisition time. In step S704, the requested SO file is acquired. Next, in step S705, the acquired SO file is processed to register the difference in the SO information in the database 419 of the site A400. Thereby, the SO information in the database 419 of the site A 400 is updated.

  Next, in step S706, the suspension of the SO processing server 411 and the suspension of acceptance of updates to the database 419 are cancelled. Thereby, registration of new SO information (step S707), acceptance of the SO file from the base B 420 (step S708), and registration of session information from the base B 420 (step S709) are resumed.

  Next, when the authentication acceptance stop in the authentication server 421 is canceled in step S710, the operation stop of all servers in the base A400 is canceled, and the authentication processing in steps S711 to S715 is resumed. At this stage, the session information in the database 419 of the site A 400 has not been updated. For this reason, the session information synchronization processing in steps S716 to S718 is performed in parallel with the restarted authentication processing. Note that it is not always necessary to be at the same timing as the restart of the authentication process, and can be executed independently at an arbitrary timing (such as during idling).

  In the session information synchronization processing, the low priority information synchronization unit 416 requests session information from the site B 420 in step S716, and acquires session information from the database 439 of the site B 420 in step S717. Next, in step S718, if the acquired session information does not exist in the database 419, it is additionally registered. If it exists, the registration time of each session information is compared between the database 419 and the database 439, the new time information is validated, and valid session information is registered in the database 419 of the base A400.

  In the present invention, on the premise of the ACT-ACT configuration, by allowing the partial information stored in the information storage unit (database) in the target base to be not consistent for a certain period of time, the above temporary It will be possible to recover more quickly from a failure such as in the case of a severe communication interruption.

  DESCRIPTION OF SYMBOLS 100 ... Information processing apparatus A, 101 ... Information storage part, 102 ... Service provision stop part, 103 ... Self-save information restoration process part, 104 ... Latest high priority information restoration part, 105 ... Service provision start part, 106 ... Latest low priority Information recovery unit 107 ... Request information transmission unit 120 ... Information processing device B 130 130 Network 140 Client

Claims (9)

In an information processing apparatus that recovers information,
Acquire the latest information that is not included in the recovery information of the request contents and high priority information of the requests from the clients received via the network from other bases connected via the network. And the latest high priority information recovery means for storing in the information storage unit,
The latest high-priority information recovery means stores the request content of the high-priority request and the high-priority information in the information storage unit, and then provides a service using the information stored in the information storage unit to the client Service provision starting means for starting processing;
After the service providing start means starts the service providing process, the latest information which is not included in the restoration information of the request content of the low priority request and the corresponding low priority information in the request received from the client. Including at least the latest low priority information recovery means for acquiring from the other base and storing it in the information storage unit,
The high priority information corresponds to a preset high priority information classification,
The low priority information corresponds to a preset classification of low priority information,
In the high priority request, information required for processing the received request is classified as the high priority information.
The information processing apparatus characterized in that the low priority request is information in which information required for processing the received request is classified as the low priority information. The information processing apparatus according to claim 1,
In response to a request from a client received via the network, service provision stop means for stopping the service provision processing;
After the service provision stop means stops the service provision processing, self-stored information recovery processing means for recovering previously stored recovery information to the information storage unit,
The latest high priority information restoration means acquires the latest information from another base connected via the network after the information for restoration is stored in the information storage unit by the information restoration processing means. And storing the information in the information storage unit. The information processing apparatus according to claim 1 or 2,
An information processing apparatus comprising: request information sending means for taking out requested information from the information storage unit and sending it to the requesting other site in response to a request from the other site. A first information processing device arranged at its own site to restore information and a second information processing device arranged at another site connected via a network;
The first information processing apparatus
The latest information that is not included in the recovery information of the request contents of the high priority request and the high priority information set in the request from the client received via the network is connected via the network. Latest high-priority information recovery means acquired from other bases and stored in the information storage unit,
The latest high-priority information recovery means stores the request content of the high-priority request and the high-priority information in the information storage unit, and then provides a service using the information stored in the information storage unit to the client Service provision starting means for starting processing;
After the service providing start means starts the service providing process, the latest information which is not included in the restoration information of the request content of the low priority request and the corresponding low priority information in the request received from the client. A low-priority information restoration unit that obtains the information from the other base and stores it in the information storage unit,
In response to a request from the first information processing apparatus, the second information processing apparatus retrieves requested information from an information storage unit included in the second information processing apparatus, and sends the requested information to the requesting first information processing apparatus. Comprising request information sending means for sending,
The high priority information corresponds to a preset high priority information classification,
The low priority information corresponds to a preset classification of low priority information,
In the high priority request, information required for processing the received request is classified as the high priority information.
The low-priority request is information processing system in which information required for processing the received request is classified as the low-priority information. The information processing system according to claim 4,
The first information processing apparatus
In response to a request from a client received via the network, service provision stop means for stopping the service provision processing;
After the service provision stop means stops the service provision processing, self-stored information recovery processing means for recovering previously stored recovery information to the information storage unit,
The latest high priority information restoration means acquires the latest information from another base connected via the network after the information for restoration is stored in the information storage unit by the information restoration processing means. And storing it in the information storage unit. In an information processing method for recovering information,
The latest information that is not included in the recovery information of the request contents of the high priority request and the high priority information set in the request from the client received via the network is connected via the network. Latest high-priority information recovery step acquired from another base and stored in the information storage unit,
A service provision start step of starting service provision processing using information stored in the information storage unit for the client after storing the request content of the high priority request and the high priority information in the information storage unit; ,
After the service providing process is started, the latest information that is not included in the restoration information of the request content of the low priority request and the corresponding low priority information in the request received from the client is sent to the other site. At least a latest low priority information recovery step that is acquired and stored in the information storage unit,
The high priority information corresponds to a preset high priority information classification,
The low priority information corresponds to a preset classification of low priority information,
In the high priority request, information required for processing the received request is classified as the high priority information.
The low-priority request is an information processing method in which information required for processing a received request is classified as the low-priority information. The information processing method according to claim 6,
In response to a request from a client received via the network, a service provision stop step of stopping the service provision process;
After this service provision stop step stops the service provision processing, it comprises a self-stored information recovery processing step for recovering previously stored recovery information in the information storage unit,
In the latest high priority information recovery step, after the information for recovery is stored in the information storage unit in the information recovery processing step, the latest information is acquired from another base connected via the network. And storing the information in the information storage unit. The information processing method according to claim 6 or 7,
An information processing method comprising: a request information sending step of taking out requested information from the information storage unit and sending it to the requesting other site in response to a request from the other site.   The program for making a computer implement | achieve the information processing method of any one of Claims 6-8.

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