JP6773533B2 - Operating environment synchronization device, operating environment synchronization system, operating environment synchronization method, and operating environment synchronization program - Google Patents

Description

The present invention relates to a technique for synchronizing the operating environment information of a standby system device with the operating environment information of an operating system device when a failover is performed in a redundant system.

In today's highly information-oriented society, high availability is required for computer systems that build social infrastructure. And, in order to realize high availability, many computer systems constitute a redundant system by an active system device and a standby system device.

In such a redundant system, in the event of a failure in the active system device, failover is performed in which the standby system device takes over the functions of the active system device. In this failover, the standby system device needs to take over the operating environment information representing the operating environment of the operating system device (synchronize the operating environment information). And, in order to increase the availability of the system, it is required to shorten the time required for failover as much as possible. Therefore, a technology that enables the standby system device to synchronize the operating environment information with the operation system device at high speed. Expectations are rising.

As a technique related to such a technique, Patent Document 1 discloses a system that performs high-speed switching processing from a failed active server to a standby server. In this system, the BIOS (Basic Input / Output System) information of the active server is acquired, and the BIOS information is restored to the standby server of the switching destination. This system acquires the full backup image of the active server, and then acquires the difference information representing the updated data among the data stored in the storage device of the active server. Then, this system restores the backup image necessary for the standby server to take over the business of the working server and the difference information to the backup server.

International Publication No. 2014-080492

By using the technique disclosed in Patent Document 1 when failover is performed, it is possible to speed up the process in which the standby system device synchronizes the operating environment information with the operating system device. That is, when the standby system device updates the operating environment information of its own device to the operating environment information of the operating system device, the standby system device operates by using the difference information indicating the difference between the own device and the operating system device regarding the operating environment information. Since it is not necessary to update the entire environment information, the update can be accelerated.

However, there is a problem that the update time may be longer by updating using the difference information than when updating the entire operating environment information. That is, in the synchronous processing using the difference information, it is necessary to update while checking the difference part in the operating environment information. Therefore, when the difference part is large (the amount of information of the difference information is large), the difference part is confirmed. The resulting overhead increases. Therefore, in such a case, the update time is shorter when updating the entire operating environment information than when updating using the difference information. The technique disclosed in Patent Document 1 cannot flexibly deal with such a problem. A main object of the present invention is to provide an operating environment synchronization device or the like that solves such a problem.

The operating environment synchronization device according to one aspect of the present invention includes the first operating environment information representing the operating environment of the operating system device in a redundant system in which failover from the operating system device to the standby system device is performed. , The extraction means for extracting the difference information representing the difference from the second operating environment information read by the standby system device when the failover is performed, and the amount of information included in the difference information satisfy a predetermined condition. When it is determined that the determination means satisfies the predetermined condition when the second operating environment information is updated to the first operating environment information by the determination means for determining whether or not or not and the failover. Includes an updating means for updating using the difference information and updating without using the difference information when it is determined that the determination means does not satisfy the predetermined condition.

From another point of view of achieving the above object, the operating environment synchronization method according to one aspect of the present invention is described in a redundant system in which an information processing device performs a failover from an operating system device to a standby system device. Difference information representing the difference between the first operating environment information representing the operating environment of the operating system device and the second operating environment information read by the standby system device when the failover is performed is extracted, and the difference is extracted. When determining whether or not the amount of information contained in the information satisfies a predetermined condition and updating the second operating environment information to the first operating environment information by the information processing, the predetermined condition is satisfied. If it is determined that the difference is satisfied, the difference information is used for updating, and if it is determined that the predetermined condition is not satisfied, the difference information is not used for updating.

Further, from the further viewpoint of achieving the above object, the operating environment synchronization program according to one aspect of the present invention is the operation system device in a redundant system in which failover from the operation system device to the standby system device is performed. Extraction processing for extracting the difference information representing the difference between the first operating environment information representing the operating environment of the above and the second operating environment information read by the standby system device when the failover is performed, and the difference. The determination when updating the second operating environment information to the first operating environment information by the determination process for determining whether or not the amount of information contained in the information satisfies a predetermined condition and the failover. If it is determined that the process satisfies the predetermined condition, the difference information is used for updating, and if it is determined that the determination process does not satisfy the predetermined condition, the update is updated without using the difference information. It is a program for making a computer execute processing.

Further, the present invention can also be realized by a computer-readable, non-volatile recording medium in which the operating environment synchronization program (computer program) is stored.

The present invention enables a standby system device to synchronize operating environment information with an operating system device at high speed and flexibly when a failover occurs in a redundant system.

It is a block diagram which shows the structure of the operating environment synchronization system 3 which concerns on 1st Embodiment of this invention. It is a figure which illustrates the structure of the operating environment information which concerns on 1st Embodiment of this invention. It is a sequence diagram which shows the normal operation of the operating environment synchronization system 3 which concerns on 1st Embodiment of this invention. It is a sequence diagram which shows the operation at the time of failover of the operating environment synchronization system 3 which concerns on 1st Embodiment of this invention. It is a figure which illustrates the structure of the difference information 103 which concerns on 1st Embodiment of this invention. It is a flowchart which shows the advance preparation process about the synchronization of the operating environment information performed by the operating environment synchronization apparatus 10 which concerns on 1st Embodiment of this invention. It is a flowchart which shows the synchronization processing of the operating environment information performed by the operating environment synchronization apparatus 10 which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the operating environment synchronization apparatus 40 which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the information processing apparatus 900 which can execute the operating environment synchronization apparatus which concerns on each embodiment of this invention.

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

<First Embodiment>
FIG. 1 is a block diagram conceptually showing the configuration of the operating environment synchronization system 3 according to the first embodiment of the present invention. The operating environment synchronization system 3 is a redundant system having an operating system device 2 and a standby system device 1. In the operating environment synchronization system 3, when a failure occurs in the operating system device 2, failover is performed in which the standby system device 1 takes over the functions of the operating system device 2.

The operation system device 2 has a management server 200 and an operation server 210. The management server 200 and the operation server 210 may be physical servers or virtual servers that are independent of each other. The operation server 210 executes the BIOS 212, and its operating environment is defined by the operating environment information 211. The BIOS 212 and the operating environment information 211 are stored in a storage device (not shown) included in the operation server 210. The storage device is, for example, a volatile memory or a non-volatile memory. The operation server 210 provides various services to the user by executing various applications.

FIG. 2 is a diagram conceptually exemplifying the configuration of the operating environment information 211 according to the present embodiment. The operating environment information 211 includes setting information 2111, configuration information 2112, revision (revision management information) 2113, and the like. The setting information 2111 is information that defines the operating environment and the like of the operating environment synchronization system 3. The configuration information 2112 is information representing the configuration and the like of the operating environment synchronization system 3. The revision 2113 is information that can identify the generation of the operating environment information 211, and the value is updated every time the operating environment information 211 is updated. The operating environment information 211 is updated by BIOS212.

The operating environment information 211 is information to be synchronized between the operating system device 2 and the standby system device 1 when a failover is performed in the operating environment synchronization system 3. The configurations of the operating environment information 201, the operating environment information 101, and the operating environment information 111 shown in FIG. 1 are the same as those of the operating environment information 211. The configuration of the operating environment information 211 is not limited to the configuration illustrated in FIG.

The management server 200 shown in FIG. 1 is a server that manages the status and the like of the operation server 210, and is connected to the standby system device 1 so as to be able to communicate with each other. The management server 200 stores a copy of the operating environment information 211 as the operating environment information 201 in a built-in storage device (not shown). The storage device is, for example, a volatile memory or a non-volatile memory. The management server 200 transmits the latest operating environment information 201 to the standby system device 1.

The standby system device 1 has a management server 100 and a standby server 110. The management server 100 and the standby server 110 may be physical servers or virtual servers that are independent of each other. The standby server 110 executes the BIOS 112, and its operating environment is defined by the operating environment information 111. The BIOS 112 and the operating environment information 111 are stored in a storage device (not shown) included in the standby server 110. The standby server 110 is in the cold standby state when the operation server 210 is operating normally. However, the cold standby is a form in which the standby system device is kept in the standby state without being operated while the operation system device is operating in the redundant system. Then, the operating environment information 111 is information that cannot be updated when the standby server 110 is in the cold standby state. When a failure occurs in the operation server 210, the standby server 110 is started by failover and takes over the functions of the operation server 210.

The management server 100 is a server that manages the state and the like of the standby server 110, and is connected to the operation system device 2 so as to be able to communicate with the operation system device 2. The management server 100 includes the operating environment synchronization device 10, and controls the process of synchronizing the operating environment information between the operating server 210 and the standby server 110 in failover. The detailed operation of the operating environment synchronization device 10 will be described later.

Next, an outline of the operation of the operating environment synchronization system 3 according to the present embodiment will be described with reference to the sequence diagrams of FIGS. 3 and 4.

FIG. 3 is a sequence diagram showing the normal operation of the operating environment synchronization system 3 according to the present embodiment.

The power switch of the management server 200 is turned on by the user operation (step S101). The management server 200 turns on the power of the operation server 210 (step S102). The operation server 210 displays the setup menu of the BIOS 212 on a display screen (not shown in FIG. 1) (step S103). The user inputs the setup change contents (change contents with respect to the operating environment information 211) in the setup menu (step S104).

The operation server 210 updates the operating environment information 211 according to the setup change contents input by the user (step S105). The operation server 210 reports the completion of the setup process to the management server 200 (step S106). The management server 200 reboots the operation server 210 (step S107).

The operation server 210 transmits the updated operating environment information 211 to the management server 200 (step S108). The management server 200 updates the operating environment information 201 to the operating environment information 211 received from the operating server 210 (step S109). The management server 200 reports the completion of receiving the operating environment information 211 to the operation server 210 (step S110).

The management server 200 transmits the operating environment information 201 to the management server 100 (step S111). The management server 100 performs preparatory processing (details will be described later) regarding synchronization of operating environment information (step S300). The management server 100 reports the completion of receiving the operating environment information 201 to the management server 200 (step S112). The operation server 210 starts the OS (Operating System) and starts the operation (step S113).

FIG. 4 is a sequence diagram showing an operation at the time of failover of the operating environment synchronization system 3 according to the present embodiment.

The operation server 210 reports the occurrence of a failure of its own device to the management server 200 (step S201). The management server 200 instructs the management server 100 to fail over (step S202). The management server 200 transmits the operating environment information 201 to the management server 100 (step S203).

The management server 100 performs preparatory processing related to synchronization of operating environment information (step S300). The management server 100 reports the completion of receiving the operating environment information 201 to the management server 200 (step S204). The management server 100 reports the completion of failover preparation to the management server 200 (step S205).

The management server 100 turns on the power of the standby server 110 (step S206). The management server 100 and the standby server 110 perform synchronous processing of operating environment information (details thereof will be described later) (step S400). The standby server 110 starts the OS (Operating System) and starts the operation after failover (step S207).

Next, the detailed operation of the operating environment synchronization device 10 shown in FIG. 1 will be described. The operating environment synchronization device 10 is a device that controls so that the operating environment information 111 in the standby server 110 and the operating environment information 211 in the operating server 210 are synchronized. That is, the operating environment synchronization device 10 controls the standby server 110 so that it can take over the operating environment of the operating server 21 and operate when failover is performed. As shown in FIG. 1, the operating environment synchronization device 10 includes an extraction unit 11, a determination unit 12, and an update unit 13.

When the operating environment information 101 is stored in the operating environment synchronization device 10, the extraction unit 11 extracts the difference between the operating environment information 101 and the operating environment information 201 received from the management server 200 as the difference information 103. For example, when the standby system device 1 is newly installed in order to construct a redundant system in the operating environment synchronization system 3, the operating environment synchronization device 10 stores the operating environment information 101. It may not be.

When the revisions (corresponding to the revision 2113 illustrated in FIG. 2) included in the operating environment information 101 and the operating environment information 201 are equal, the extraction unit 11 considers that the operating environment information 101 and the operating environment information 201 are the same. Therefore, the process of extracting the difference information 103 is not performed. When the revisions included in the operating environment information 101 and the operating environment information 201 are different, the extraction unit 11 sets the operating environment information 101 for each item such as the setting information 2111 and the configuration information 2112 illustrated in FIG. 2, for example, in bit units. The process of extracting the difference information 103 is performed by calculating the exclusive OR with the operating environment information 201. The extraction unit 11 stores the extracted difference information 103 in a storage device (not shown) built in the operating environment synchronization device 10. The storage device is, for example, a volatile memory or a non-volatile memory.

FIG. 5 is a diagram conceptually illustrating the configuration of the difference information 103 according to the present embodiment. The difference information 103 includes a header area 1030 and a data area 1031.

Signature is stored in the header area 1030. The Signature is written when the difference information 103 is first stored in the operating environment synchronization device 10, and is deleted when the difference information 103 is deleted. That is, the fact that the Signature is stored in the header area 1030 indicates that the difference information 103 exists in the operating environment synchronization device 10.

The data area 1031 constitutes the body of the difference information 103 and includes one or more entries including four items: flag 1032, offset 1033, size 1034, and data 1035. Of these, it is assumed that the data 1035 stores, for example, the data (difference data) of the main body for up to 8 bytes in the difference information 103 for each entry.

One of "Data", "Area", "Cont", and "Invalid" is set in the flag 1032. "Data" indicates that the size of the difference data stored as the data 1035 of the entry is 8 bytes or less. “Area” indicates that when difference data larger than 8 bytes is stored over a plurality of consecutive entries, that entry is the first entry to store the difference data. "Cont" indicates that when the difference data larger than 8 bytes is stored over a plurality of consecutive entries, the entry is the second and subsequent entries for storing the difference data. "Invalid" indicates that the entry does not contain any difference data (ie, the entry is invalid).

In the offset 1033, an offset address representing the position (pointer) of the difference point indicated by each entry in the address space in which the operating environment information 101 and the operating environment information 201 are stored is stored. However, the offset 1033 in the entry in which the flag 1032 is "Cont" has a relative address to the offset address of the first entry (that is, the entry in which "Area" is set as the flag 1032) that stores the difference data larger than 8 bytes. It is stored.

The size 1034 stores the size of the difference data to be stored in the entry. However, the offset 1033 in the entry in which the flag 1032 is "Area" stores the size of the entire difference data larger than 8 bytes stored over the plurality of entries starting from the entry.

For example, in the first entry from the top in the data area 1031 illustrated in FIG. 5, 1-byte difference data "01" is stored in the offset address "Offset xx". However, it is assumed that the data 1035 in FIG. 5 stores data represented by a hexadecimal number. Further, "x" in the data 1035 is a symbol indicating that there is no data. For example, in the fourth to seventh entries from the top in the data area 1031 illustrated in FIG. 5, 32 bytes of difference data are stored in the offset address “Offset ss”.

The configuration of the difference information 103 illustrated in FIG. 5 is an example, and the configuration of the difference information 103 may be different from the configuration illustrated in FIG.

In the determination unit 12 shown in FIG. 1, the amount of information included in the difference information 103 extracted by the extraction unit 11 when the operating environment synchronization device 10 updates the operating environment information 111 to the operating environment information 101 by failover. It is determined whether or not (data amount) satisfies a predetermined condition (for example, whether or not it is equal to or less than a predetermined threshold value).

For example, the determination unit 12 may use half of the amount of information included in the operating environment information 101 as the threshold value. The determination unit 12 or the update unit 13, which will be described later, uses the difference information 103 to update the operating environment information 111 to the operating environment information 101, and the operating environment information 111 without using the difference information 103. The amount of information when the time required to update the operating environment information 101 is equal may be used as the threshold value. However, it is assumed that the time required to update the operating environment information 111 to the operating environment information 101 according to the amount of information included in the difference information 103 is obtained as a value measured in advance. The time required to update the operating environment information 111 to the operating environment information 101 using the difference information 103 increases as the amount of information contained in the difference information 103 increases as the overhead generated by checking the difference points increases. become longer.

The update unit 13 updates the operating environment information 111 to the operating environment information 101 when failover is performed. At this time, when the determination result by the determination unit 12 indicates that the amount of information included in the difference information 103 is equal to or less than the threshold value, the update unit 13 updates the operating environment information 111 using the difference information 103. In this case, the update unit 13 confirms the offset address indicated by the difference information 103 in the operating environment information 111, and updates the data of the offset address in the operating environment information 111 based on the content of the difference information 103.

When the determination result by the determination unit 12 indicates that the amount of information included in the difference information 103 is larger than the threshold value, the update unit 13 copies the entire operating environment information 101 to the standby server 110 without using the difference information 103. By doing so, the operating environment information 111 is updated (replaced) with the operating environment information 101.

Next, the operation (processing) of the operating environment synchronization device 10 according to the present embodiment will be described in detail with reference to the flowcharts of FIGS. 6 and 7.

FIG. 6 is a flowchart showing a preliminary preparation process for synchronization of operating environment information performed by the operating environment synchronization device 10. The preparatory process shown in the flowchart of FIG. 6 corresponds to step S300 shown in the sequence diagrams of FIGS. 3 and 4.

The operating environment synchronization device 10 receives the operating environment information 201 from the management server 200 when starting the process of step S300 (step S301). The update unit 13 confirms whether or not the operating environment information 101 is stored in the operating environment synchronization device 10 (step S302).

When the operating environment information 101 is stored in the operating environment synchronization device 10 (Yes in step S303), the update unit 13 confirms whether or not the revisions of the operating environment information 201 and the operating environment information 101 are equal (step). S304). If the revisions are equal (Yes in step S305), the process proceeds to step S307.

When the revisions are different (No in step S305), the update unit 13 stores the operating environment information 201 received from the management server 200 as the operating environment information 101 in the operating environment synchronization device 10 (step S306), and the process is stepped. Proceed to S307.

The extraction unit 11 confirms whether or not the revisions of the operating environment information 101 and the operating environment information 111 are equal (step S307). If the revisions are equal (Yes in step S308), the process of step S300 ends. When the revisions are different (No in step S308), the extraction unit 11 extracts the difference between the operating environment information 101 and the operating environment information 111 as the difference information 103, and transfers the extracted difference information 103 to the operating environment synchronization device 10. It is stored (step S309), and the process of step S300 ends.

FIG. 7 is a flowchart showing a synchronization process of operating environment information performed by the operating environment synchronization device 10. The synchronization process shown in the flowchart of FIG. 7 corresponds to step S400 shown in the sequence diagram of FIG.

The update unit 13 confirms whether or not the revisions of the operating environment information 101 and the operating environment information 111 are equal (step S401). If the revisions are equal (Yes in step S402), the process in step S400 ends.

When the revisions are different (No in step S402), the determination unit 12 confirms whether or not the amount of information included in the difference information 103 is equal to or less than the threshold value (step S403). When the amount of information is equal to or less than the threshold value (Yes in step S404), the update unit 13 updates the operating environment information 111 to the operating environment information 101 using the difference information 103 (step S405), and the processing in step S400 is performed. finish. When the amount of information is larger than the threshold value (No in step S404), the update unit 13 updates the operating environment information 111 to the operating environment information 101 without using the difference information 103 (step S406), and processes in step S400. Is finished.

The operating environment synchronization device 10 according to the present embodiment is such that the standby system device synchronizes the operating environment information with the operation system device at high speed and flexibly when failover is performed in the redundant system. Can be done. The reason is that the operating environment synchronization device 10 operates according to whether or not the amount of information included in the difference information obtained by extracting the difference between the operating system device and the standby system device satisfies a predetermined condition for the operating environment information. This is because it is decided whether or not to use the difference information in updating the environment information.

The effects realized by the operating environment synchronization device 10 according to the present embodiment will be described in detail below.

In failover, when the standby system updates (synchronizes) the operating environment information of its own device with the operating environment information of the operating system, it shows the difference between the own device and the operating system device regarding the operating environment information. By using the information, the update can be accelerated. However, when updating using the difference information, the overhead generated by checking the difference location becomes large, so that the update time of the operating environment information becomes longer (worse) than when the entire operating environment information is updated. ).

To solve such a problem, the operating environment synchronization device 10 according to the present embodiment includes an extraction unit 11, a determination unit 12, and an update unit 13. That is, the extraction unit 11 extracts the difference information 103 in the operating environment synchronization system 3 in which failover from the operation server 210 (operation system device 2) to the standby server 110 (standby system device 1) is performed. The difference information 103 is information representing the difference between the operating environment information 211 representing the operating environment of the operating server 210 and the operating environment information 111 read by the standby server 110 when failover is performed. The determination unit 12 determines whether or not the amount of information included in the difference information 103 satisfies a predetermined condition (for example, whether or not it is equal to or less than a threshold value). When updating the operating environment information 111 to the operating environment information 101 by failover, the updating unit 13 updates using the difference information 103 if the determination unit 12 determines that the predetermined condition is satisfied. When the determination unit 12 determines that the predetermined condition is not satisfied, the update unit 13 updates without using the difference information 103. As a result, the operating environment synchronization device 10 according to the present embodiment enables the standby system device to synchronize the operating environment information with the operation system device at high speed and flexibly when failover is performed in the redundant system. Can be.

Further, in the determination unit 12 according to the present embodiment, the time required for the update unit 13 to update the operating environment information 111 to the operating environment information 101 using the difference information 103, and the updating unit 13 using the difference information 103. The amount of information included in the difference information 103 when the time required to update the operating environment information 111 to the operating environment information 101 is equal to the operating environment information 101 is used as a threshold value for determination. That is, the operating environment synchronization device 10 according to the present embodiment controls so that the time required to update the operating environment information 111 to the operating environment information 101 is minimized according to the amount of information included in the difference information 103. .. As a result, the operating environment synchronization device 10 according to the present embodiment can perform high-precision synchronization of the operating environment information with the operating system device at high speed and flexibly.

Further, in the above-described embodiment, the operating environment synchronization device 10 is included in the management server 100, but the configuration in which the operating environment synchronization device 10 is mounted is not limited to the configuration shown in FIG. The operating environment synchronization device 10 may be a device different from the management server 100 that is communicably connected to the management server 100. Alternatively, for example, the BIOS 112 may include at least a part of the functions provided by the operating environment synchronization device 10.

<Second embodiment>
FIG. 8 is a block diagram conceptually showing the configuration of the operating environment synchronization device 40 according to the second embodiment of the present invention.

The operating environment synchronization device 40 according to the present embodiment includes an extraction unit 41, a determination unit 42, and an update unit 43.

In a redundant system in which failover from the operating system device 5 to the standby system device 4 is performed, the extraction unit 41 performs failover with the first operating environment information 511 indicating the operating environment of the operating system device 5. The difference information 403 representing the difference from the second operating environment information 411 read by the standby system device 4 is extracted.

The determination unit 42 determines whether or not the amount of information included in the difference information 403 satisfies a predetermined condition.

When the update unit 43 updates the second operating environment information 411 to the first operating environment information 511 by failover, if the determination unit 42 determines that the predetermined condition is satisfied, the difference information 403 is added. Update using. When the determination unit 42 determines that the predetermined condition is not satisfied, the update unit 43 updates the second operating environment information 411 to the first operating environment information 511 without using the difference information 403.

The operating environment synchronization device 40 according to the present embodiment is such that the standby system device synchronizes the operating environment information with the operation system device at high speed and flexibly when failover is performed in the redundant system. Can be done. The reason is that the operating environment synchronization device 40 depends on whether or not the amount of information contained in the difference information 403 extracted from the difference between the operating system device 5 and the standby system device 4 satisfies a predetermined condition for the operating environment information. This is because it is decided whether or not to use the difference information 403 in updating the operating environment information.

<Hardware configuration example>
In each of the above-described embodiments, each part of the operating environment synchronization devices 10 and 40 shown in FIGS. 1 and 8 can be realized by a dedicated HW (HardWare) (electronic circuit). Further, in FIGS. 1 and 8, at least the following configuration can be regarded as a function (processing) unit (software module) of the software program.
-Extractors 11 and 41
・ Judgment units 12 and 42,
・ Update units 13 and 43,
However, the division of each part shown in these drawings is a configuration for convenience of explanation, and various configurations can be assumed at the time of mounting. An example of the hardware environment in this case will be described with reference to FIG.

FIG. 9 is a diagram illustrating an example of a configuration of an information processing device 900 (computer) capable of executing the operating environment synchronization device according to each embodiment of the present invention. That is, FIG. 9 is a configuration of a computer (information processing device) capable of realizing the operating environment synchronization device shown in FIGS. 1 and 8 or a part thereof, and each function in the above-described embodiment can be realized. Represents a hardware environment. The information processing apparatus 900 shown in FIG. 9 includes the following as components.
-CPU (Central_Processing_Unit) 901,
-ROM (Read_Only_Memory) 902,
・ RAM (Random_Access_Memory) 903,
-Hard disk (storage device) 904,
-Communication interface 905 with an external device such as a wireless transmitter / receiver,
・ Bus 906 (communication line),
A reader / writer 908 that can read and write data stored in a recording medium 907 such as a CD-ROM (Compact_Disc_Read_Only_Memory),
-Input / output interface 909.

That is, the information processing device 900 including the above components is a general computer in which these components are connected via the bus 906. The information processing apparatus 900 may include a plurality of CPUs 901 or may include a CPU 901 configured by a multi-core processor.

Then, the present invention described by taking the above-described embodiment as an example supplies the computer program capable of realizing the following functions to the information processing apparatus 900 shown in FIG. The function is the above-described configuration in the block configuration diagrams (FIGS. 1 and 8) referred to in the description of the embodiment, or the function of the flowchart (FIGS. 6 and 7). The present invention is then achieved by reading, interpreting, and executing the computer program in the CPU 901 of the hardware. Further, the computer program supplied in the device may be stored in a readable / writable volatile memory (RAM 903) or a non-volatile storage device such as a ROM 902 or a hard disk 904.

Further, in the above case, as a method of supplying the computer program into the hardware, a general procedure can be adopted at present. As the procedure, for example, there are a method of installing in the device via various recording media 907 such as a CD-ROM, a method of downloading from the outside via a communication line such as the Internet, and the like. Then, in such a case, the present invention can be regarded as being composed of a code constituting the computer program or a recording medium 907 in which the code is stored.

The invention of the present application has been described above using the above-described embodiment as a model example. However, the present invention is not limited to the above-described embodiments. That is, the present invention can apply various aspects that can be understood by those skilled in the art within the scope of the present invention.

1 Standby system device 10 Operating environment synchronization device 11 Extraction unit 12 Judgment unit 13 Update unit 101 Operating environment information 103 Difference information 1030 Header area 1031 Data area 1032 Flag 1033 Offset 1034 Size 1035 Data 110 Standby server 111 Operating environment information 112 BIOS
2 Operational equipment 200 Management server 201 Operating environment information 210 Operation server 211 Operating environment information 2111 Setting information 2112 Configuration information 2113 Revision 212 BIOS
3 Operating environment synchronization system 4 Standby system equipment 40 Operating environment synchronization device 41 Extraction unit 42 Judgment unit 43 Update unit 403 Difference information 411 Second operating environment information 5 Operation system equipment 511 First operating environment information 900 Information processing device 901 CPU
902 ROM
903 RAM
904 hard disk (storage device)
905 Communication interface 906 Bus 907 Recording medium 908 Reader / writer 909 Input / output interface

Claims (10)

In a redundant system in which a failover from an active system device to a standby system device is performed, the first operating environment information representing the operating environment of the active system device and the standby system device when the failover is performed. An extraction means that extracts the difference information that represents the difference from the second operating environment information read by
A determination means for determining whether or not the amount of information contained in the difference information satisfies a predetermined condition, and
When updating the second operating environment information to the first operating environment information by the failover, if the determination means determines that the predetermined condition is satisfied, the difference information is used for updating. When it is determined that the determination means does not satisfy the predetermined condition, the update means for updating without using the difference information and the update means.
Operating environment synchronization device. The determination means determines whether or not the amount of information is equal to or less than a threshold value.
The operating environment synchronization device according to claim 1. The determination means includes the time required for the updating means to update the second operating environment information to the first operating environment information using the difference information, and the updating means without using the difference information. The amount of information when the time required to update the second operating environment information to the first operating environment information becomes equal is determined by using the threshold value.
The operating environment synchronization device according to claim 2. The first and second operating environment information includes revision management information representing the generation.
The extraction means extracts the difference information when the values indicated by the revision management information included in the first and second operating environment information are different from each other.
The updating means updates the second operating environment information to the first operating environment information when the values indicated by the revision management information included in the first and second operating environment information are different from each other.
The operating environment synchronization device according to any one of claims 1 to 3. The first and second operating environment information includes a plurality of items.
The extraction means extracts the difference information for each item.
The operating environment synchronization device according to any one of claims 1 to 4. The first and second operating environment information includes, as the items, setting information that defines the operating environment of the redundant system, and configuration information that represents the configuration of the system.
The operating environment synchronization device according to claim 5. The second operating environment information is read by the BIOS executed by the standby system device when the standby system device is started.
The operating environment synchronization device according to any one of claims 1 to 6. The standby system device including the operating environment synchronization device according to any one of claims 1 to 7 and the operation system device.
The operating system device uses the first operating environment information when the first operating environment information is updated and when the failover from the operating system device to the standby system device is performed. Send to the operating environment synchronizer,
Operating environment synchronization system. Depending on the information processing device
In a redundant system in which a failover from an active system device to a standby system device is performed, the first operating environment information representing the operating environment of the active system device and the standby system device when the failover is performed. Extract the difference information that represents the difference from the second operating environment information read by
It is determined whether or not the amount of information included in the difference information satisfies a predetermined condition.
When updating the second operating environment information to the first operating environment information by the failover, if it is determined that the predetermined condition is satisfied, the difference information is used to update and the predetermined operating environment information is used. If it is determined that the conditions are not satisfied, the difference information is not used and the update is performed.
Operating environment synchronization method. In a redundant system in which a failover from an active system device to a standby system device is performed, the first operating environment information representing the operating environment of the active system device and the standby system device when the failover is performed. Extraction processing that extracts the difference information that represents the difference from the second operating environment information read by
Judgment processing for determining whether or not the amount of information included in the difference information satisfies a predetermined condition, and
When updating the second operating environment information to the first operating environment information by the failover, if it is determined that the determination process satisfies the predetermined condition, the difference information is used for updating. When it is determined that the determination process does not satisfy the predetermined condition, the update process for updating without using the difference information and the update process.
An operating environment synchronization program that allows a computer to run.

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