JP5836177B2 - Operation system switching device, operation system switching method, and operation system switching program - Google Patents

Description

  The present invention relates to an operation system switching device, an operation system switching method, and an operation system switching program capable of automatically switching a connection destination on a terminal side when a failure occurs in a connection destination system.

  Conventionally, a cluster system is known that can efficiently process messages from a plurality of load balancers even when a node server does not operate normally (see, for example, Patent Document 1). In the invention described in Patent Document 1, each of the three node servers included in the cluster system connected to the two load balancers includes session node information that associates the session ID with the node server in charge, and node life / death information. Is stored. When the cluster system receives a message sent from any one of the load balancers, it determines whether the function of the node server responsible for the message session is operating normally and replaces the node server responsible for the session. Update session node information to change to a node server. Then, data indicating the alternative node server is transmitted to a load balancer other than the load balancer that transmitted the message.

  In data communication via multiple load balancers, even if a node server does not operate normally, multiple load balancers can distribute messages belonging to the same session or related sessions to the same cluster node. And can process messages efficiently.

JP 2007-15669 A

  By the way, in a system configuration using the server / client system, two systems of servers are prepared, and when one system server fails, the operation can be continued by switching to the other system server. It has been broken. In such a system configuration, a load balancer is provided between the server and the client, and when a failure occurs, the client is connected to the server of the system where the load balancer is not broken, so that the client is connected to the server. Work can continue even if a failure occurs.

  However, in the configuration in which a load balancer is provided between the server and the client, there is a problem that a cost for introducing the load balancer is necessary and a cost for maintaining the load balancer is necessary. Further, in the configuration in which the load balancer switches the servers, there is a problem that the advantage of providing two systems of servers cannot be utilized when the load balancer fails.

  The present invention has been made in view of such circumstances, and an operation system switching apparatus and an operation system switching method capable of performing connection switching that does not require a load balancer in a server clean system including a plurality of systems of servers. And an operation system switching program.

  The present invention provides a connection means for connecting to a system at a predetermined operation site, an information holding means for holding information necessary for switching to a system to be connected when a failure occurs in the system at the operation site, A failure detection means for detecting a failure of the system at the operation site; and when the failure detection means detects a system failure at the operation site, the information held by the information holding means is referred to the system to be connected And switching means for switching a system connected by the connection means.

  The present invention includes connection means for connecting to a system at a predetermined operation site, and information holding means for holding information necessary for switching to a system to be connected when a failure occurs in the system at the operation site. An operation system switching method performed by an operation system switching system, comprising: a failure detection step for detecting a system failure in the operation site; and the information holding unit when the failure detection unit detects a system failure in the operation site. And a switching step of switching the system connected by the connection means to the system to be connected with reference to the information held by the computer.

  The present invention includes connection means for connecting to a system at a predetermined operation site, and information holding means for holding information necessary for switching to a system to be connected when a failure occurs in the system at the operation site. A failure detection step for detecting a failure of the system at the operation site in a computer on the operation system switching device, and information held by the information holding means when a system failure at the operation site is detected at the failure detection step. With reference to the system to be connected, a switching step of switching a system connected by the connection means to the system to be connected is performed.

  According to the present invention, when logging in to a predetermined operation site from a terminal, information necessary for automatic site switching is held inside the terminal, and a system or network failure of the logged-in site is detected. Since the terminal itself can automatically switch the login destination by referring to the information necessary for automatic switching, the device for switching the login destination, such as a load balancer, is no longer necessary. It is possible to reduce introduction costs, maintenance costs, and the like. As a result, even when a failure occurs, the user does not need to deal with it, so the burden on the user when the failure occurs can be reduced.

It is a block diagram which shows the structure of one Embodiment of this invention. It is a flowchart which shows operation | movement of the terminal shown in FIG. It is explanatory drawing which shows the structure of the state file shown in FIG.

  Hereinafter, an operation system switching apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In this figure, reference numerals 1, 2, 3 and 4 denote server / client type client terminals (hereinafter referred to as terminals), which are constituted by personal computers, for example. Reference numerals 11, 21, 31, and 41 are state files stored in the storage devices connected to the terminals 1, 2, 3, and 4, respectively. Reference numeral 5 denotes a network.

  Reference numeral 6 denotes an apparatus management system that manages and operates a wavelength division multiplexing transmission apparatus that is a management target apparatus, and includes four servers. Reference numeral 61 denotes a Web server connected to the network 5 and performs information communication with each of the terminals 1 to 4. Reference numeral 62 denotes an application server that executes an application. Reference numeral 63 denotes a database server that includes a database and reads and writes data. Reference numeral 64 denotes a system management server that manages the operation of each server.

  Reference numeral 7 denotes an apparatus management system that manages and operates a wavelength division multiplexing transmission apparatus that is a management target apparatus, and includes four servers. The device management system 7 has the same configuration as the device management system 6 and performs device management work in place of the device management system when the device management system 6 fails. Reference numeral 71 denotes a Web server connected to the network 5 and performs information communication with each of the terminals 1 to 4. Reference numeral 72 denotes an application server that executes an application. Reference numeral 73 denotes a database server that includes a database and reads and writes data. Reference numeral 74 denotes a system management server that manages the operation of each server.

  The device management system 6 operates as a Web site for the terminals 1 to 4. The terminals 1 to 4 use the Web site provided by the device management system 6 to perform operations for registering device information and opening paths. In addition, the terminals 1 to 4 also perform centralized monitoring and control of the link network configured by the wavelength multiplexing transmission apparatus. The terminals 1 to 4 cooperate with other systems (not shown) to grasp the path configuration including the service node information and the line information such as optical cores, thereby allowing the users of the terminals 1 to 4 (transmission line operators). ) Is used to speed up the failure countermeasures for the transmission line operated by Here, the site normally provided by the device management system 6 is referred to as an operation site. A site provided by the device management system 7 is referred to as a backup site.

  The system management server 64 monitors the processing operations of the servers (Web server 61, application server 62, and database server 63) that constitute the device management system 6, and also configures the server management system 7 (Web server 71, application server). 72, the processing operation of the database server 73) is also monitored. Similarly, the system management server 74 monitors the processing operations of the servers (Web server 71, application server 72, database server 73) constituting the device management system 7, and also servers (Web server 61) constituting the device management system 6. The processing operations of the application server 62 and the database server 63) are also monitored.

  The terminals 1 to 4 are terminals provided by the operators of the device management systems 6 and 7, and predetermined software and state files 11 to 41 are stored in the storage device in each of the terminals 1 to 4. FIG. 1 shows an example in which different users (transmission channel operators) use four terminals, but the number of terminals is not limited to four, and five or more terminals can be used by different users. You may make it operate. One user may use a plurality of terminals. However, at least the same software provided by the operators of the device management systems 6 and 7 is stored in the storage device of each terminal.

  Next, the processing operation of the terminal shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a flowchart showing the processing operation of the terminal shown in FIG. Here, although it demonstrates as what uses the terminal 1, the processing operation of another terminal is also the same. First, when the transmission line operator performs an operation of logging in the terminal 1 to the Web server, the terminal 1 logs in to the Web server 61 (step S1). Then, the terminal 1 confirms the normality of the login destination site (step S2). Here, the terminal 1 can execute an operation (for example, a select statement) to the database server 63 via the Web server 61 and can refer to the status file 11 to log in. Check normality based on this.

  Here, the state file stored in the storage device of each terminal will be described. FIG. 3 is a diagram showing a table structure of the state files 11 to 41 shown in FIG. As shown in FIG. 3, the site state after the transition and the login destination are associated with each other at the current site state when the operation site fails. By referring to this state file, if the current site state is specified, a login destination to be subsequently logged in can be specified. At this time, if the login destination is “error”, this indicates that login is not possible.

  Next, as a result of confirming the normality of the login destination site, if it is abnormal, the terminal 1 confirms the normality of the opposing system (here, the device management system 7 that provides the service of the spare site) (step) S3). This normality check is based on whether or not an operation (for example, a select statement) to the database server 73 can be executed via the Web server 71 and login can be performed by referring to the state file 11. Check for normality. If the result of the normality confirmation is abnormal, the process ends abnormally (step S4).

  On the other hand, if it is confirmed in step S2 or step S3 that it is normal, the terminal 1 acquires information necessary for automatic switching from the web server (here, the web server 61 or the web server 71) (step S5). ). The information necessary for automatic switching here is identification information of a site (operation site or backup site) to be logged in, an IP address of the operation site or backup site, and a user name and password to log in.

  Next, the terminal 1 logs in to the operation site or the backup site (step S6). At this time, if the confirmation result in step S2 is normal, the operation site is logged in. If the confirmation result in step S3 is normal, the operation is logged in to the spare site. Subsequently, the terminal 1 detects the normality of the connection (step S7). The detection here is to detect a failure of the network 5 between the terminal 1 and the Web server 61 (or Web server 71), or that the process or OS (Operating System) of the Web server is down. . If no abnormality is detected (normal) as a result of this detection, the terminal 1 uses the device management system 6 (or device management system 7) via the login destination web server 61 (or web server 71). Then, normal work is performed (step S12). Then, the terminal 1 returns to step S7 and continues the normal operation while detecting the normality of the connection.

  On the other hand, if there is an abnormality as a result of detecting the normality of the connection, the terminal 1 refers to the information necessary for automatic switching and refers to the opposing system (if the current status is the device management system 6 at the operation site, the standby Normality is confirmed with the site device management system 7) (step S8). Here, the terminal 1 can execute an operation (for example, a select statement) to the database server 73 via the Web server 71 and can log in by referring to the state file 11. Check normality based on this. If the result of this confirmation is abnormal, normality confirmation is retried (step S9). At this time, the number of retries is a predetermined number. As a result of the retry, if normality cannot be confirmed (abnormal), the process ends abnormally (step S10).

  On the other hand, when the normality of the opposite system is confirmed, the terminal 1 refers to the information necessary for automatic switching, logs in to the opposite system (here, the device management system 7 at the spare site), and performs normal work. It performs (step S12). Then, the terminal 1 returns to step S7 and continues the normal operation while detecting the normality of the connection. At this time, if there is an abnormality as a result of the normality detection of the connection, it is automatically switched again to the opposite system (or the device management system 6 at the operation site if the current state is the device management system 7 at the spare site) and the normal operation is continued. .

  As described above, when logging in to the device management system from a terminal, the identification information of the logged-in site (operation site or backup site), the IP addresses of the operation site and backup site, the logged-in user name and password are stored in the terminal If the device management system or network failure of the logged-in site is detected, the terminal automatically switches the login destination by referring to the stored information. As described above, a device for switching a login destination such as a load balancer is not required, and the introduction cost, the maintenance cost, and the like can be reduced. In addition, when a load balancer is used, a network failure between the terminal and the Web server cannot be detected. However, since the terminal itself detects the failure, the login destination can be changed even if a network failure occurs between the terminal and the Web server. It becomes possible to switch automatically. Thereby, even if a failure occurs, the user does not need to deal with it, so that the burden on the user when the failure occurs can be reduced.

  The program for realizing the function of the terminal in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed to execute automatic site switching processing. You may go. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  When a failure occurs in the connection destination system, it can be applied to an application in which it is essential to automatically switch the connection destination on the terminal side.

  1, 2, 3, 4 ... terminal, 11, 21, 31, 41 ... status file, 5 ... network, 6 ... device management system (operation site), 7 ... device management system (Spare site)

Claims (3)

A connection means for connecting to a system at a predetermined operation site;
According to the current site status of the operation site and the standby site, a status file in which information on login destinations to be logged in when the operation site fails is related and stored;
A failure detection means for detecting a failure of the system of the operation site;
When the failure detection unit detects a system failure at the operation site, the current site state between the operation site and the backup site is specified, and the state file is referred to and related to the current site state Switching means for acquiring the information of the login destination being registered, and switching the system connected to the login destination system by the connection means with reference to the acquired information of the login destination. Operation system switching device to perform. A state file in which connection means for connecting to a system at a predetermined operation site and the current site state of the operation site and the spare site are associated with and stored login destination information to be logged in when the operation site fails An operation system switching method performed by an operation system switching device comprising :
A failure detection step of detecting a failure of the system of the operation site;
When a system failure in the operation site is detected in the failure detection step, the current site state of the operation site and the backup site is identified, and the state file is referred to and related to the current site state And a switching step of switching a system connected to the login destination system by the connection means with reference to the acquired login destination information. Operation system switching method. A state file in which connection means for connecting to a system at a predetermined operation site and the current site state of the operation site and the spare site are associated with and stored login destination information to be logged in when the operation site fails In the computer on the operation system switching device comprising
A failure detection step of detecting a failure of the system of the operation site;
When a system failure in the operation site is detected in the failure detection step, the current site state of the operation site and the backup site is identified, and the state file is referred to and related to the current site state And a switching step of switching a system connected to the login destination system by the connection means with reference to the acquired login destination information. Operation system switching program to be executed.

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