JP5613578B2 - Virtualization environment resource management configuration change system and program - Google Patents

Description

  The present invention relates to a computer system / information processing technology in a virtual environment such as cloud computing, and in particular, a technology for managing resources of a virtual server in a virtual environment, and a technology for scheduling a configuration change of a virtual server in a virtual environment. , Etc.

  In a computer system using a virtualization technology, resources (hardware resources) (allocation thereof) such as a CPU (processor) and a memory for a virtual server can be flexibly changed. Further, based on this technique (resource management), it is conceivable to schedule the configuration change of the virtual server and manage the configuration change of the virtual server.

  As a prior art example related to the above, there is a technique described in JP 2007-148469 A (Patent Document 1).

  Patent Document 1 describes a technique in which a virtual resource administrator registers hardware resources in a virtual environment, and a virtual machine administrator registers a configuration change of a virtual server.

JP 2007-148469 A

  In the technique described in Patent Document 1, if a registered configuration change is canceled before the change process is performed or there is a virtual server that is not turned on, an actual hardware resource is vacant, Hardware resources may not be used efficiently.

  As described above, in the related art, there is room for improvement in terms of efficiency with respect to the resources of the virtual environment (virtual server) and the configuration change.

  In view of the above, the main object of the present invention is to manage resources in a virtual environment (virtual server) (such as allocation, use status grasping / prediction / reservation), and management of virtual server configuration changes based on the resource management. It is related to (registration / cancellation / scheduling, etc.), and is to provide a technology that can efficiently use resources of a virtual environment and can use more virtual servers.

  In order to achieve the above object, a representative form of the present invention is to manage resources of a virtual environment (virtual server) (such as allocation, use status grasping / prediction / reservation), and a virtual server based on the resource management. A computer system (virtual environment resource management configuration change system), a program, etc. related to configuration change management (registration, cancellation, scheduling, etc.), characterized by having the following configuration.

  In the system of the present invention, in the information processing of the resource management and configuration change management of the virtual environment (virtual server), based on the information such as the resource usage of the past (actual) virtual server, the future virtual server The amount of resource used is predicted, based on which the virtual server resource (its allocation) is efficiently reserved, and the configuration of the virtual server is changed (scheduled) accordingly.

  In this system, information such as the usage and usage rate of resources (hardware resources) in the virtualization environment is collected and acquired and accumulated in the resource management DB. The accumulated resource usage rate, virtual server resource reservation value, etc. Based on the information, the free space of the virtual environment is predicted. In this system, when the configuration change of the virtual server is registered, the predicted free space is confirmed, and if there is a free space compared with the necessary amount for the configuration (configuration change), the configuration change is scheduled. Do. Then, when the scheduled date and time (time) is reached, the configuration of the virtual server is automatically changed by this system.

  This system form uses, for example, a collection function that collects the resource usage status of a virtual server in a virtual environment and stores the information in the resource management DB, information in the resource management DB, and information in the configuration change management DB. Update the resource reservation status, check the resource reservation status using the update function that registers the information in the resource reservation management DB and the information in the resource reservation management DB, and change the configuration of the virtual server in the virtual environment A registration function for registering the information in the configuration change management DB, and a scheduling function for performing configuration change scheduling and execution of configuration change for the virtual environment based on the schedule using the information in the configuration change management DB. The update function calculates the predicted value of the free space of the virtual environment resource using information including the past resource usage rate of the virtual environment in the resource management DB and the reservation status of the virtual server resource Then, information including the predicted value and the reserved value of the resource corresponding to the predicted value is registered in the resource reservation management DB to update the resource reservation status. The registration function uses information including the prediction value and the reservation value in the resource reservation management DB, and determines that the configuration change is possible when there is a space for the configuration change, and changes the configuration change information. Register in the management DB.

  According to a typical embodiment of the present invention, management of resources in a virtual environment (virtual server) (such as allocation, usage status grasping / prediction / reservation), and management of virtual server configuration change based on the resource management ( (Registration / Cancellation / Scheduling, etc.), the resources of the virtual environment can be used efficiently, and more virtual servers can be used.

It is a figure which shows the block structural example of the whole computer system containing the system (virtualization environment resource management structure change system) of one embodiment of this invention. It is a figure which shows the structural example regarding the hardware / software of the whole system of FIG. It is a flowchart which shows the operation example of the virtual server structure change registration of this system. It is a flowchart which shows the operation example of the virtualization environment resource collection of this system. It is a flowchart which shows the operation example of the resource reservation status update of this system. It is a figure which shows the structural example of the virtual environment resource management table of this system. It is a figure which shows the structural example of the virtual environment resource reservation management table of this system. It is a figure which shows the structural example of the virtual server structure change management table of this system. It is a figure which shows the example of a specific example regarding a resource reservation status update process (calculation of a free space prediction value).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

[System configuration (1)]
FIG. 1 shows a configuration example of an entire computer system including a system 1 according to an embodiment of the present invention. The entire computer system in FIG. 1 has a system 1 (virtual environment resource management configuration change system) 1, a client PC 2, and a virtual environment 3 (including a virtual server 4) connected to each other. is there.

  The system 1 (virtual environment resource management configuration change system) according to the present embodiment has a function for managing resources of the virtual environment 3 (virtual server 4) and managing configuration changes of the virtual environment 3 (virtual server 4). And performs characteristic processing according to the corresponding program of the present embodiment. Note that resource management and configuration change management may be configured as different systems and linked.

  The system 1 includes a virtual server configuration change registration function 10 (abbreviated as “registration function”), a virtual server configuration change cancellation function 13 (“cancel function”), a resource reservation management DB 14, a resource reservation status update function 15 (“update function”). ”), Resource management DB 16 (resource usage status management DB), virtualization environment resource collection function 17 (“ collection function ”), configuration change management DB 18, virtual server configuration change scheduling function 19 (“ scheduling function ”), and the like. It is a configuration. The registration function 10 includes a resource reservation status confirmation function 11 (“confirmation function”) and a configuration change information registration function 12. Each function (processing unit) is realized by software program processing or the like.

  The client PC 2 is a PC (terminal or the like) of a client that operates (accesses / uses) the system 1, and is operated by an administrator user or the like, such as a processor, a memory, a disk, a communication interface device, an input device, and an output device. Comprised of general techniques.

  The virtualization environment 3 is a virtualization environment for which the system 1 performs resource management, configuration change, and the like, and each of the plurality of virtual servers 4 (in FIG. 1) running in the virtualization environment 3 (upper). For example, three of # 1 to # 3).

  The registration function 10 has a function of registering a configuration change in accordance with a request (r1) from the client PC 2. The cancel function 13 has a function of canceling (unexecuted) configuration change (e1) in accordance with a request (r2) from the client PC 2. Registration / cancellation of these configuration changes (information thereof) is stored (reflected) in the configuration change management DB 18.

  The collection function 17 periodically collects and acquires the resource usage status (information thereof) of the virtual server 4 operating in the virtualization environment 3 and stores it in the resource management DB 16 (a1, a2).

  The update function 15 calculates a predicted value of the free space of the resource in the virtualization environment 3 based on the resource use status (information) stored in the resource management DB 16 and registers it in the resource reservation management DB 14 (b1, b2).

  The confirmation function 11 in the registration function 10 determines whether the configuration can be changed based on the predicted value registered in the resource reservation management DB 14 (c1). Here, when the predicted value exceeds the necessary amount (necessary amount for the configuration change) (that is, when it is predicted that there is sufficient space for the configuration change), the confirmation function 11 Judge that change is possible. In response to this determination, the configuration change information registration function 12 registers a change instruction (instruction information for the configuration change) in the configuration change management DB 18 (c2).

  The scheduling function 19 performs configuration change scheduling of the virtual server 4 in the virtualization environment 3 and configuration change execution processing based on the schedule based on the contents registered in the configuration change management DB 18 (d1, d2).

[System configuration (2)]
FIG. 2 shows a configuration example relating to hardware and software of the entire system including the system 1 of FIG. On a network 90 (such as the Internet), a computer 100 (such as a physical server device) configuring the system 1, a client PC 2, and one or more computers 300 (such as a physical server device) configuring the virtual environment 3 And a storage 80 and the like are connected. In the computer 100, each function (10, 13, 15, 17, 19) and each management DB (14, 16, 18) of the system 1 are configured. The present invention is not limited to this, and the system 1 and the virtual environment 3 may be configured on the same computer. Various data such as the management DB may exist in another server device or storage on the network 90.

  The computer 100 of the system 1 has a configuration in which a processor 101, a memory 102, a disk 103, an input device 104, an output device 105, a communication interface device 106, and the like are connected by a bus or the like. In the disk 103, the program (function program) 111 and the management DB 112 (the management DBs (14, 16, 18) of the present embodiment for realizing the functions of the system 1 as services (for the client PC 2)). ), Etc.) are stored. The processor 101 reads out the code (function code) 113 of the program 111 and the data of the management DB 112 from the disk 103 onto the memory 102 as necessary, and executes the processing of each function.

  The computer 300 in the virtualization environment 3 includes hardware 301, a hypervisor 302 (virtual machine control program, etc.), a management OS 303, a plurality of virtual servers 304 (corresponding to 4 in FIG. 1), and the like. The hardware 301 includes known elements such as a CPU, a memory, and a disk. For example, when the virtual server 4 is operated by the hypervisor method, the computer 300 operates the hypervisor 302 on the hardware 301 and operates the management OS 303 and the plurality of virtual servers 304 on the hypervisor 302. The hypervisor 302 performs control of operating a plurality of virtual servers 304 by virtualizing and using resources (CPU, memory, etc.) of the hardware 301. The storage 80 is data storage means connected to or built in the computer 300.

  Note that the virtual environment 3 (such as a cloud computing system) may be configured without being limited to the example of FIG. 2 (hypervisor method). The virtual server 4 may be assigned to each of a plurality of server devices.

[Registration function]
FIG. 3 shows an operation / processing example of the virtual server configuration change registration function 10 {11, 12} (S200 and the like represent processing steps).

  (S200) The registration function 10 accepts a configuration change request (r1) from the client PC2. Upon receiving the request (r1), the confirmation function 11 of the registration function 10 confirms the availability of resources based on information in the resource reservation management DB 14. The information in the resource reservation management DB 14 includes predicted free capacity (predicted value of free resource amount related to reservation) of resources (CPU, memory, etc.) of the virtual environment 3.

  In the confirmation in S200, if there is a free resource (S200-Y) in the period (target date, etc.) designated by the client PC 2 (administrator user, etc.), the virtual server configuration change schedule registration process in S201 I do. That is, the configuration change information registration function 12 of the registration function 10 registers information including the configuration change content and its schedule in the configuration change management DB 18 (f1).

  Next, in S202, the reservation status in the resource reservation management DB 14 is updated by the update function 15 based on the registration in S201 (f2).

[Cancel function]
An example of the operation / processing of the virtual server configuration change cancellation function 13 is as follows. The cancel function 13 accepts a configuration change cancel request (r2) from the client PC2. Upon receiving the request (r2), the cancel function 13 obtains the corresponding (unexecuted) configuration change schedule (its information) registered in the configuration change management DB 18 in the virtual server configuration change schedule deletion process. By deleting, the (unexecuted) configuration change is canceled (e1). In addition, the amount of the resource amount that was scheduled to be allocated corresponding to the configuration change canceled by the above processing is added to the free space in the resource reservation management DB 14 by the resource reservation status update processing of the update function 15 ( f2).

[Collection function]
FIG. 4 shows an operation / processing example of the virtualization environment resource collection function 17. In S400, the collection function 17 acquires and collects information such as the usage amount / usage rate of resources (CPU, memory, etc.) of each virtual server 4 operating in the virtualization environment 3, and in S401, the collection Information is accumulated in the resource management DB 16 (table in FIG. 6). After this collection / accumulation process, in S402, it is determined whether or not the end of the function (17) is specified. If there is no end instruction (N), in S403, sleep for a certain period and wait until the next collection time. From S400, the collection / accumulation process is repeated in the same manner. If there is an end instruction in S402 (Y), the process of this function (17) is ended.

[Update function]
FIG. 5 shows an operation / processing example of the resource reservation status update function 15. The update function 15 performs a process of calculating a predicted value of the future free resource amount and storing the information in the resource management DB 16 (table in FIG. 7).

  In the processing units of S500 to S505, the processing of S501 to S504 is repeated for the number of days (period etc.) designated (for example, set from the client PC 2) in the present system 1, thereby calculating the predicted value (T). . That is, a predicted value (T) for each target date is calculated. In S506, it is determined whether or not the update function 15 is finished. If not finished (N), the process waits until the next update date (time) in S507, and the same processing is repeated for each update date.

The following terms are used in terms and definitions:
M: Sum of the amount of resources allocated to the virtual server 4 N: Sum of the amount of resource usage of the virtual server 4 P: Average usage rate (average value of usage rate) with respect to the resource allocation value of the virtual server 4 (P = N ÷ M )
Q: Sum of resource reservation values of virtual server 4 R: Predicted value of resource usage of virtual server 4 (R = P × Q)
S: Hardware resource amount of virtual environment 3 T: Predicted value of free space of hardware resource of virtual environment 3 (T = SR).

In the entire processing related to this function (15), the calculation formula of the predicted value (T) is as follows.
T = S−R = S− (P × Q) = S− (N ÷ M × Q).

  In S501, [average usage rate for resource allocation value of virtual server 4] (P) is calculated. As a method of calculating this P, the [sum of the resource usage of the virtual server 4] (N) is divided by the [sum of the resource amount allocated to the virtual server 4] (M) (P = N ÷ M ), The usage rate (P) as of the predicted value calculation date is obtained.

  In step S502, [the predicted value of the resource usage of the virtual server 4] (R) is calculated. This R is calculated by multiplying the average usage rate (P) obtained in S501 by [the sum of resource reservation values of the virtual server 4] (Q) (R = P × Q). The resource usage prediction value (R) in units is obtained. The hardware resources are, for example, a CPU and a memory.

  Next, in S503, [predicted value of free space of hardware resources of virtual environment 3] (T) is calculated. This T is calculated by subtracting the predicted resource usage (R) obtained in S502 from the value of [Hardware resource amount of virtualization environment 3] (S) (T = SR). ) To determine the estimated free space value (T).

  Next, in S504, the estimated free space value (T) obtained in S503 is registered in a table in the resource reservation management DB 14 (FIG. 7, virtual environment resource reservation management table).

  A specific example relating to the calculation of the predicted free space value (T) is as follows. FIG. 9 shows a supplementary image of this example. (A) is the current date or past (actual) first date and time (before configuration change), and (B) is the future (prediction / reservation) second date and time (after configuration change), the allocated amount and usage amount. Indicates. For example, in the virtualization environment 3 having 4 GHz for CPU resources, consider the case where there are three virtual servers 4 (for example, # 1 to # 3) allocated in 0.5 GHz units (the same concept applies to memory resources and the like). is there). CPU resource amount of the virtual environment 3 = 4 GHz, CPU resource allocation amount per virtual server 4 (per virtual server) = 0.5 GHz, sum of CPU resource allocation amounts of the allocated virtual server 4 = 0.5 × 3 = 1.5 GHz.

  In this case, the free amount (free CPU resource amount) calculated from the CPU resource allocation amount of the virtual server 4 is 4-1.5 = 2.5 GHz. Here, it is assumed that the total CPU usage of the three virtual servers 4 is, for example, 1 GHz. The usage rate of 3 (average usage rate per unit) is 1 / 1.5 = 67%. Then, there is 4-1 = 3 GHz as free space in the entire virtualization environment 3 (CPU resource).

  The above is the state of the first configuration (configuration change) on the first date and time. For example, when the CPU (its resource allocation) of one of the three virtual servers 4 (for example, # 1) is changed from 0.5 GHz to 1 GHz from the second date and time one week later (resource reservation) And configuration change scheduling). In this case, similarly to the above, the free space calculated from the allocated amount (0.5 × 2 + 1.0 = 2 GHz for three) is 4-2 = 2 GHz. Here, it is assumed that the usage rate is also 1 ÷ 1.5 = 67% at the second date and time (predicted (assumed) that the usage rate is the same as that of the first date and time). Then, the predicted usage amount is 2 GHz × 67% = 1.34 GHz, and the predicted free space amount (free CPU resource amount predicted value) in the entire virtualization environment 3 (CPU resource) is 4-1.34 = 2.66 GHz. Become.

  When the above example is applied by the calculation formula for the predicted value (T), T = SR = S- (P * Q) = S- (N / M * Q) = 4- (1 / 1.5). × 2) ≈2.66 ([GHz]).

  The system 1 (update function 15) captures resource reservation (reservation amount) for configuration change according to the prediction (prediction amount), and updates the resource reservation status in response to this. Regarding the configuration change of the CPU resource allocation of the virtual server 4 in the above example, the estimated amount of use is 1.34 GHz, the free space corresponding to it is 2.66 GHz, and the reservation amount is 2.0 GHz. Update reservation status.

[Scheduling]
An example of the operation and processing of the virtual server configuration change scheduling function 19 is as follows. The scheduling function 19 sets the virtual server 4 (virtual server name) to be subjected to configuration change, its allocated resource amount, and the like according to the registered contents (change instruction) in the configuration change management DB 18 (table of FIG. 8). Then, the scheduling function 19 executes a configuration change process (work) for the virtualization environment 3 based on the setting (schedule).

[Resource management table]
FIG. 6 shows an example of a virtual environment (virtual server) -resource management table existing in the resource management DB 16. Items include “date and time”, “virtualized server name”, “CPU allocation”, “CPU usage”, “CPU usage”, “memory allocation”, “memory usage”, “memory usage”, Etc. In this table, for the resource usage information collected by the collection function 17, the usage at that time is accumulated together with the collected date and time. The CPU amount (processing performance) is, for example, in GHz units, and the memory amount (capacity) is, for example, in Gbyte units.

[Resource reservation management table]
FIG. 7 shows an example of a virtual environment (virtual server) -resource reservation management table existing in the resource reservation management DB 14. As items, “date”, “virtualized environment CPU” (total amount), “CPU reserved amount”, “CPU predicted free space”, “virtualized environment memory” (total amount), “memory reserved amount”, “memory predicted free space” Quantity ", etc. In this table, in addition to the amount of resources (hardware resources) such as CPU and memory of the virtualization environment 3, information such as the daily reservation amount and the predicted free space shown in FIG. 5 is stored.

[Configuration change management table]
FIG. 8 shows an example of a virtualization environment (virtual server) -configuration change management table that exists in the configuration change management DB 18. The items include “configuration change date / time”, “applicant”, “virtual server name”, “CPU allocation”, “memory allocation”, and the like. In this table, the configuration change date and time, the applicant (administrator user name), the name of the virtual server that is the target of the configuration change, and the corresponding CPU / memory allocation input from the client PC 2 based on the operation of the administrator user or the like Store information such as quantity.

[Effects]
As described above, according to the system 1 of the present embodiment, when the registration / scheduling of the configuration change of the virtualization environment 3 (virtual server 4) is performed, the resource reservation status of the virtual server 4 and the past It is possible to predict a (real) free amount of resources from the resource usage status and reserve more resources than the predicted amount in the virtual server 4 (its allocation). Thereby, the resources of the virtual environment 3 can be efficiently used, and more virtual servers 4 can be used.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  The present invention can be used for, for example, a virtual hosting service operation business in an outsourcing service, a configuration change business of a virtual server constructed using a virtualization technology, and the like.

  DESCRIPTION OF SYMBOLS 1 ... This system (virtualization environment resource management configuration change system), 2 ... Client PC, 3 ... Virtualization environment, 4 ... Virtual server, 10 ... Virtual server configuration change registration function (virtual server configuration change management function), 11 ... Resource reservation status confirmation function, 12 ... Configuration change information registration function, 13 ... Virtual server configuration change cancellation function, 14 ... Resource reservation management DB, 15 ... Resource reservation status update function, 16 ... Resource management DB (resource usage status management DB) , 17 ... Virtualization environment resource collection function, 18 ... Configuration change management DB, 19 ... Virtual server configuration change scheduling function, 80 ... Storage, 90 ... Network, 100, 300 ... Computer.

Claims (6)

A system for performing resource management and configuration change management for virtual servers in a virtualized environment using computer information processing,
As a function realized by information processing of the computer,
A collection function for collecting resource usage information of virtual servers in the virtualization environment and storing information including resource allocation, usage, and usage as resource information in a resource management DB;
The configuration change of the virtual server of the virtual environment using the information of the resource management DB and the information of the configuration change management DB for managing the information of the configuration change regarding the configuration including the resource of the virtual server of the virtual environment. an update function which the as information for availability of the resource update information including the predicted value of the resource reservation amount and the free volume, and registers the updated information to the resource reservation management DB for,
A registration function for confirming the reservation status of the resource using the information of the resource reservation management DB, and registering the configuration change information of the virtual server of the virtualization environment in the configuration change management DB;
Using the information of the configuration change management DB, and having a scheduling function for performing the configuration change scheduling and the configuration change for the virtualization environment based on the schedule,
The update function uses information including a resource usage rate of the virtual environment in the resource management DB and information on a reservation status of the resource of the virtual server, and updates the resource of the virtual environment. Calculate a predicted value of free space, register the information including the predicted value and the resource reservation amount corresponding to the predicted value in the resource reservation management DB, and update the resource reservation status information ,
The registration function uses the information including the predicted value and the reservation of the resource reservation management within DB, if there is a free resource for the configuration change, it is determined that allows the configuration change, the configuration A virtualization environment resource management configuration change system characterized by registering change information in the configuration change management DB. The virtual environment resource management configuration change system according to claim 1,
In the process of calculating the predicted value by the update function,
From the sum (M) of the resource amount allocated to the virtual server and the sum (N) of the resource usage of the virtual server, the average usage rate (P = N) with respect to the resource allocation amount of the virtual server ÷ M) to calculate,
The average utilization and (P), wherein from the sum of the reservation of the virtual server resource (Q), the process of calculating predicted values of the resource usage of the virtual server (R = P × Q),
A process of calculating a predicted value (T = S−R) of the free space of the virtual environment resource from the predicted value (R) and the virtual environment resource amount (S). And a virtual environment resource management configuration change system. The virtual environment resource management configuration change system according to claim 1,
The collection function periodically acquires information on the usage and usage rate of hardware resources including the CPU and memory of the virtualization environment, and performs a process of storing the information in a table in the resource management DB. A virtual environment resource management configuration change system characterized. The virtual environment resource management configuration change system according to claim 1,
The registration function confirms the predicted value in the resource reservation management DB with respect to the configuration change request of the virtual server, and the configuration change is possible when the predicted value exceeds a necessary amount for the configuration change. The configuration change information is registered in the configuration change management DB,
The virtual environment resource management configuration change system, wherein the update function updates information on a predicted value of a free space of the virtual environment in the resource reservation management DB in accordance with the registration. The virtual environment resource management configuration change system according to claim 1,
In response to a request for canceling an unexecuted configuration change, the configuration change management DB has a cancel function for canceling the unexecuted configuration change by deleting information on the corresponding unexecuted configuration change,
The update function updates the information on the predicted amount of free space in the resource reservation management DB so as to add the resource amount corresponding to the cancellation amount to the free space of the resource of the virtual environment. A virtual environment resource management configuration change system. A program for executing processing for performing resource management and configuration change management for a virtual server in a virtualized environment using information processing of a computer,
As processing by the program,
A collection process for collecting resource usage information of a virtual server in the virtualization environment and storing information including resource allocation amount, usage amount and usage rate in the resource management DB as the information ;
The configuration change of the virtual server of the virtual environment using the information of the resource management DB and the information of the configuration change management DB for managing the information of the configuration change regarding the configuration including the resource of the virtual server of the virtual environment. and updating said as information for availability of the resource update information including the predicted value of the resource reservation amount and the free volume, and registers the updated information to the resource reservation management DB for,
A registration process for confirming the reservation status of the resource using the information of the resource reservation management DB, and registering the configuration change information of the virtual server of the virtualization environment in the configuration change management DB;
Using the information of the configuration change management DB, the scheduling of the configuration change and a scheduling process for executing the configuration change for the virtualization environment based on the schedule,
The update process uses information including a past resource usage rate of the virtual environment in the resource management DB and information on a reservation status of the resource of the virtual server. Including a process of calculating a predicted value of the free space, registering information including the predicted value and a resource reservation amount corresponding to the predicted value in the resource reservation management DB, and updating the resource reservation status information ,
The registration process, by using the information including the predicted value and the reservation of the resource reservation management within DB, if there is a free resource for the configuration change, it is determined that allows the configuration change, the configuration A program characterized by including a process of registering change information in the configuration change management DB.

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