CN109857429A - A kind of update method, device, equipment and the storage medium of resources of virtual machine configuration - Google Patents

A kind of update method, device, equipment and the storage medium of resources of virtual machine configuration Download PDF

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Publication number
CN109857429A
CN109857429A CN201910008248.5A CN201910008248A CN109857429A CN 109857429 A CN109857429 A CN 109857429A CN 201910008248 A CN201910008248 A CN 201910008248A CN 109857429 A CN109857429 A CN 109857429A
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China
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virtual machine
summary file
target
allocation information
resource allocation
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CN201910008248.5A
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CN109857429B (en
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田永卫
杨春林
赵婧宏
冉慧凯
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Inspur Power Commercial Systems Co Ltd
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Inspur Power Commercial Systems Co Ltd
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Abstract

This application discloses a kind of update methods of resources of virtual machine configuration, it include: in the modification instruction for receiving the resource distribution of modification target virtual machine, target summary file is created, and is stored the resource allocation information obtained is updated according to modification instruction into target summary file;Target virtual machine is controlled again updates resource distribution according to the resource allocation information in target summary file.Therefore, this method is on the basis of saving updated resource allocation information, also original summary file and corresponding resource allocation information are remained, therefore, target virtual machine can be run according to updated resource allocation information restarts, without carrying out the adjustment of resource distribution again after target virtual machine is restarted;The efficiency for improving the update of resources of virtual machine configuration, improves the usage experience of user.Disclosed herein as well is updating device, equipment and the computer readable storage mediums of a kind of configuration of resources of virtual machine, all have above-mentioned beneficial effect.

Description

A kind of update method, device, equipment and the storage medium of resources of virtual machine configuration
Technical field
The present invention relates to field of computer technology, in particular to a kind of update method of resources of virtual machine configuration, is set device Standby and computer readable storage medium.
Background technique
Currently, Power server is widely deployed in local private clound by way of virtualization, also, Power The resource distribution of virtual machine on server is generally defined by summary file.That is, saving virtual machine in summary file The resources such as CPU, memory, I/O configuration information, when starting virtual machine, virtual machine obtains pair according to the content of summary file The resource distribution answered.In virtual machine operational process, user needs often dynamic to adjust the resource of virtual machine according to business demand Configuration.In the prior art, after carrying out dynamic resource adjustment to virtual machine, when closing virtual machine, the resource of dynamic adjustment is matched Confidence breath will be lost, therefore when being again started up virtual machine, virtual machine can only be opened according to the summary file before adjustment It is dynamic, to need again to be adjusted the resource distribution of virtual machine.Therefore, according to matching in the prior art to the resource of virtual machine The method being updated is set, user is needed to execute a large amount of repetitive operation, not only reduces the resource distribution update of virtual machine Efficiency, and seriously affect the usage experience of user.
Therefore, the update efficiency for how improving resources of virtual machine configuration, promotes the usage experience of user, is art technology The current technical issues that need to address of personnel.
Summary of the invention
In view of this, can be improved void the purpose of the present invention is to provide a kind of update method of resources of virtual machine configuration The update efficiency of quasi- machine resource distribution, promotes the usage experience of user;It is a further object of the present invention to provide a kind of virtual machine moneys Updating device, equipment and the computer readable storage medium of source configuration, all have above-mentioned beneficial effect.
In order to solve the above technical problems, the present invention provides a kind of update method of resources of virtual machine configuration, comprising:
When the modification instruction for the resource distribution for receiving modification target virtual machine, target summary file is created;
It is instructed according to the modification and stores updated resource allocation information into the target summary file;
It controls the target virtual machine and the money is updated according to the resource allocation information in the target summary file Source configuration.
Preferably, further comprise:
The switching command for responding user, determines the first history summary file from multiple history summary files;Wherein, institute State the summary file that history summary file is old version;
It controls the target virtual machine and updates the money using the resource allocation information in the first history summary file Source configuration.
Preferably, further comprise:
The identification information correspondence of server where the target virtual machine is stored in the target summary file;
When receiving migration instruction, corresponding destination server is determined according to migration instruction;
The second history summary file is determined using identification information corresponding with the destination server;
It controls the target virtual machine and updates the money using the resource allocation information in the second history summary file Source configuration.
Preferably, believed in the control target virtual machine using the resource distribution in the first history summary file Breath updates the resource distribution later or in the control target virtual machine using in the second history summary file After resource allocation information updates the resource distribution, further comprise:
Deletion is created after the first history summary file or the corresponding creation time of the second history summary file The summary file built.
Preferably, further comprise:
The summary file is stored in resource pool.
Preferably, further comprise:
Show the different information between the summary file of adjacent version.
Preferably, the creation target summary file specifically includes:
The title of the target summary file is set using the time of version number and/or the creation target summary file.
In order to solve the above technical problems, the present invention also provides a kind of updating devices of resources of virtual machine configuration, comprising:
Creation module, for when the modification instruction for the resource distribution for receiving modification target virtual machine, creation target to be general Want file;
Memory module stores updated resource allocation information to the target summary for being instructed according to the modification In file;
Update module is believed for controlling the target virtual machine according to the resource distribution in the target summary file Breath updates resource distribution.
In order to solve the above technical problems, the present invention also provides a kind of more new equipments of resources of virtual machine configuration, comprising:
Memory, for storing computer program;
Processor realizes the update method of any of the above-described kind of resources of virtual machine configuration when for executing the computer program The step of.
In order to solve the above technical problems, the present invention also provides a kind of computer readable storage medium, it is described computer-readable Computer program is stored on storage medium, the computer program realizes any of the above-described kind of virtual machine money when being executed by processor The step of update method of source configuration.
The update method of resources of virtual machine configuration provided by the invention, comprising: in the money for receiving modification target virtual machine When the modification instruction of source configuration, target summary file is created, and believe the resource distribution obtained is updated according to modification instruction Breath is stored into target summary file;Target virtual machine is controlled again updates money according to the resource allocation information in target summary file Source configuration.It is obtained since target summary file re-creates, this method is saving updated resource distribution letter On the basis of breath, original summary file and corresponding resource allocation information are also remained, therefore, target virtual machine can be according to Updated resource allocation information operation is restarted, without carrying out resource distribution again after target virtual machine is restarted Adjustment;The efficiency for improving the update of resources of virtual machine configuration, improves the usage experience of user.
In order to solve the above technical problems, the present invention also provides a kind of resources of virtual machine configuration updating device, equipment and Computer readable storage medium all has above-mentioned beneficial effect.
Detailed description of the invention
It in order to illustrate the embodiments of the present invention more clearly or the technical solution of the prior art, below will be to embodiment or existing Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root Other attached drawings are obtained according to the attached drawing of offer.
Fig. 1 is a kind of flow chart of the update method of resources of virtual machine configuration provided in an embodiment of the present invention;
Fig. 2 is a kind of structure chart of the updating device of resources of virtual machine configuration provided in an embodiment of the present invention;
Fig. 3 is a kind of structure chart of the more new equipment of resources of virtual machine configuration provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The core of the embodiment of the present invention is to provide a kind of update method of resources of virtual machine configuration, can be improved virtual machine money The update efficiency of source configuration, promotes the usage experience of user;Another core of the invention is to provide a kind of resources of virtual machine configuration Updating device, equipment and computer readable storage medium, all have above-mentioned beneficial effect.
It is right with reference to the accompanying drawings and detailed description in order to make those skilled in the art more fully understand the present invention program The present invention is described in further detail.
Fig. 1 is a kind of flow chart of the update method of resources of virtual machine configuration provided in an embodiment of the present invention.Such as Fig. 1 institute Show, a kind of update method of resources of virtual machine configuration includes:
S10: when the modification instruction for the resource distribution for receiving modification target virtual machine, target summary file is created.
Specifically, being referred in response user by the modification of the resource distribution of the modification target virtual machine of management control layer input After order, target summary file is created.That is, the current resource allocation information of virtual machine is determined by current summary file Justice on the basis of original summary file, increases newly in the modification instruction for receiving the resource distribution of modification target virtual machine One summary file, i.e. creation target summary file.
It should be noted that resource distribution refer to operational objective virtual machine needed for resource, such as memory, CPU, I/O. In addition, the present embodiment is specifically to utilize power server (power minicomputer) that target virtual machine (subregion) is arranged;In others In embodiment, other kinds of server also can be used, corresponding target virtual machine is set, the present embodiment is to for being arranged mesh Mark the type of the server of virtual machine without limitation.In addition, the present embodiment does not do the interactive device for responding user's operation It limits, such as can be HMC (Hardware Management Console, Hardware Management Console), IVM (Integrated Virtualization Manager, Integrated Virtual manager) or Novalink (PowerVM NovaLink) etc., Yong Hutong HMC, IVM or Novalink input modification instruction or other operational orders are crossed, with the resource of modification and management objectives virtual machine Configuration information.
S20: updated resource allocation information is stored into target summary file according to modification instruction.
Specifically, modification instruction can be the instruction modified to the resource allocation information in original summary file, Corresponding, this step is then to store the resource allocation information obtained after modification into target summary file;Alternatively, modification instruction Can be user input resource allocation information, it is corresponding, this step be then by user input resource allocation information store to In target summary file;Corresponding operation is executed according to the type of modification instruction, purpose is by updated resource distribution Information is stored into target summary file.
S30: control target virtual machine updates resource distribution according to the resource allocation information in target summary file.
It should be noted that then being controlled after storing updated resource allocation information into target summary file Target virtual machine updates the resource distribution of itself according to the resource allocation information in target summary file.
It should be noted that target virtual machine updates the mode of resource distribution, online updating can be, namely do not closing In the case where target virtual machine, the resource distribution of target virtual machine is adjusted, is also possible to by way of restarting target virtual machine The resource distribution of target virtual machine is updated, the present embodiment does not limit this.
The update method of resources of virtual machine configuration provided in an embodiment of the present invention, comprising: receiving modification destination virtual When the modification instruction of the resource distribution of machine, target summary file is created, and the resource obtained will be updated according to modification instruction Configuration information is stored into target summary file;Target virtual machine is controlled again according to the resource allocation information in target summary file Update resource distribution.It is obtained since target summary file re-creates, this method is saving updated resource On the basis of configuration information, original summary file and corresponding resource allocation information, therefore, destination virtual function are also remained It is enough to restart according to the operation of updated resource allocation information, without carrying out resource again after target virtual machine is restarted The adjustment of configuration;The efficiency for improving the update of resources of virtual machine configuration, improves the usage experience of user.
In specific implementation, when to target virtual machine resource distribution carry out repeatedly modification adjustment after, exist need by The resource allocation information of target virtual machine is changed to the resource allocation information phase in the summary file with history some version again Corresponding situation.Therefore, the present embodiment has made further instruction and optimization to technical solution on the basis of the above embodiments, Specifically, the present embodiment further comprises:
The switching command for responding user, determines the first history summary file from multiple history summary files;Wherein, it goes through History summary file is the summary file of old version;
It controls target virtual machine and updates resource distribution using the resource allocation information in the first history summary file.
It is understood that upper target summary file then becomes old version in creation target summary file every time Summary file namely history summary file.By responding the switching command of user, first from multiple history summary files really The first history summary file corresponding with the switching command is made, namely determines to need the summary text for the old version being switched to Part then controls target virtual machine and utilizes the in the way of updating resource distribution after determining the first history summary file Resource allocation information in one history summary file updates the resource distribution of target virtual machine.
It should be noted that creation target summary file specifically includes as preferred embodiment:
Utilize version number and/or the title for the time setting target summary file for creating target summary file.
Specifically, the title of target summary file is arranged by version number, that is, being first the original of target virtual machine Summary file setting starting version number is the target summary of creation according to preset rules in creation target summary file every time Corresponding version number is arranged in file.Version number is usually to be arranged in incremental form, and each version number is different, so as to Enough each summary files of unique identification.
Specifically, using the time of creation target summary file as the title of the corresponding target summary file created, I.e. when creating target summary file, current time is obtained, target summary then is set using current time according to preset format The title of file.Obviously, the time is inherently incremental and mutually different, therefore, utilizes time setting target summary file Title, can either each summary file of unique identification, and can embody each summary file creation sequence.
It should be noted that in specific implementation, target summary text can also be arranged in the way of much information combination The title of part.For example, can further include the abstract of resource allocation information in the title of target summary file, so as to The particular content in each summary file is more intuitively known in user.
In specific implementation, exist and need target virtual machine on from current server migration to other servers Demand, therefore, on the basis of the above embodiments, the present embodiment has made further instruction and optimization to technical solution, specifically , the present embodiment further comprises:
The identification information correspondence of server where target virtual machine is stored in target summary file;
When receiving migration instruction, corresponding destination server is determined according to migration instruction;
The second history summary file is determined using identification information corresponding with destination server;
It controls target virtual machine and updates resource distribution using the resource allocation information in the second history summary file.
Specifically, the present embodiment further obtains the identification information of the server where target virtual machine, and will acquire Identification information storage in corresponding target summary file.That is, it is different according to the server where target virtual machine, The target summary file of corresponding creation is different.It should be noted that the present embodiment does not do the concrete type of identification information It limits, as long as being capable of unique identification server.
For example, when target virtual machine on server when, corresponding resource allocation information is X1, and the mark of server is believed Breath is Y1, and corresponding target summary file version is Z1;When target virtual machine is moved in server B, target summary text Resource allocation information in part is still X1, but the update of identification information of server is Y2, at this time corresponding target summary file Version be Z2;The adjustment of resource distribution is carried out to target virtual machine again, resource allocation information is updated to X2, the mark of server Information is still Y2, and corresponding target summary file version is Z3.
In specific implementation, if the server A where target virtual machine script breaks down, target virtual machine is migrated To server B, to carry out fault restoration to server A and then migrate target virtual machine to server A, namely to target Virtual machine carries out operation of moving back.According to the method for the present embodiment, by advance by the server where target virtual machine script Identification information storage is into corresponding target summary file;It needs from server B to move back target virtual machine to clothes when receiving When the migration instruction of business device A, corresponding destination server A is first determined according to migration instruction, then according to destination server A's Identification information determines corresponding second history summary file, then utilizes the resource allocation information in the second history summary file Update resource distribution.When identification information corresponds to the summary file of multiple versions, then according to actual demand, such as according to summary file In resource allocation information determine the second history summary file, or determine second according to the creation time of each summary file History summary file.It is that configuration resource information retracts when moving back target virtual machine to destination server in the present embodiment The corresponding configuration resource information of the summary file of the last one version when being on destination server to target virtual machine.It can See, this method further increases the efficiency for updating resource distribution, promotes the usage experience of user.
On the basis of the above embodiments, the resource distribution in the first history summary file is utilized in control target virtual machine The resource allocation information in the second history summary file is utilized more after information update resource distribution or in control target virtual machine After new resources configuration, further comprise:
Delete the summary created after the first history summary file or the corresponding creation time of the second history summary file File.
It specifically, in the present embodiment, is gone through the resource distribution of target virtual machine is switched to the first of old version History summary file or after adjourning to target virtual machine on original server from other server last times, deletion is gone through first The summary file created after history summary file or the corresponding creation time of the second history summary file.
Specifically, in general, if target virtual machine is the switching namely summary for carrying out summary file on the same server The identification information of the target switching version server corresponding with current version of file is identical, then target can be switched version (the first history summary file) is used as newly created target summary file, then controls target virtual machine according to the first history summary Resource allocation information in file updates the resource distribution of itself;It in the present embodiment, is by calling the first history summary text Part, and the resource distribution that target virtual machine updates itself according to the resource allocation information in the first history summary file is controlled, so The summary file created after the corresponding creation time of the first history summary file is deleted afterwards.
For example, it is assumed that currently there is the history summary file of Z1, Z2 and Z3 totally three versions, by the resource of target virtual machine Configuration be switched to it is corresponding with the history summary file of Z2 version after, the history summary file of Z3 version can be deleted.It can be with Understand, user matches in the corresponding resource of some summary file that the resource distribution of target virtual machine is switched to old version When setting, the probability for indicating that the summary file created after the version is used again is fewer, therefore by corresponding summary file It deletes, to reduce the memory source occupied needed for storage summary file, further promotes the performance of target virtual machine, promoted and used The usage experience at family.
If summary file target switching version and current version be on a different server, and target switch version pair The destination server answered is move back to target virtual machine operating corresponding server, then can return carrying out target virtual machine After moving operation, the summary file that will create after most newly created summary file corresponding with the identification information of destination server It deletes.That is, the version rollback of summary file to target virtual machine is located at the mesh finally created on destination server Mark the corresponding version of summary file.Likewise, this method can reduce the memory source occupied needed for storage summary file, into one Step promotes the performance of target virtual machine, promotes the usage experience of user.
On the basis of the above embodiments, the present embodiment has made further instruction and optimization to technical solution, specifically, Further comprise:
Summary file is stored in resource pool.
Specifically, summary file includes target summary file and history summary file.In specific implementation, generally by summary File is stored in server, namely is stored in local storage, but in order to avoid being damaged or due to server to mesh Mark virtual machine is difficult to get corresponding summary file after being migrated, and as preferred embodiment, the present embodiment is further Summary file is stored in resource pool.That is, being write when creating target summary file, while by target summary file pair Into the local storage and virtual memory, that is, resource pool of server, so that target virtual machine be allow to obtain from resource pool Resource allocation information in summary file carries out the update of resource distribution.In addition, in actual operation, can also according to it is default when Between the period summary file stored in local storage and the summary file stored in resource pool synchronized into update, with into one Step improves the accuracy for carrying out resource distribution update.
On the basis of the above embodiments, the present embodiment has made further instruction and optimization to technical solution, specifically, Further comprise:
Show the different information between the summary file of adjacent version.
It is understood that since the present embodiment is the target summary that the resource allocation information of each update is stored in creation In file, therefore, after the adjustment for repeatedly carrying out resource distribution, the summary file of multiple versions will be obtained.
In order to improve the usage experience of user, in the present embodiment, user can be by calling memory interface to check target The information of the summary file of each version of virtual machine.Specifically, user can obtain summary file according to the version number of setting Overall condition, such as overall quantity;In addition, user can check the concrete condition of resource allocation information in each summary file.
Phase is further compared after the configuration information to target virtual machine is modified as preferred embodiment The resource allocation information of the summary file of two adjacent versions, obtains different information, the different information then obtained by display, Namely obtain the resource allocation information modified in the summary file of two neighboring version, so that further promote user uses body It tests.
A kind of embodiment of the update method of resources of virtual machine configuration provided by the invention is carried out above detailed Description, the present invention also provides updating device, equipment and the computers of a kind of resources of virtual machine configuration corresponding with this method can Storage medium is read, due to the embodiment and the embodiment phase of method part of device, equipment and computer readable storage medium part Mutually correlate, therefore the embodiment of device, equipment and computer readable storage medium part refers to the embodiment of method part Description, wouldn't repeat here.
Fig. 2 is a kind of structure chart of the updating device of resources of virtual machine configuration provided in an embodiment of the present invention, such as Fig. 2 institute Show, a kind of updating device of resources of virtual machine configuration includes:
Creation module 21, for creating target when the modification instruction for the resource distribution for receiving modification target virtual machine Summary file;
Memory module 22, for being stored updated resource allocation information to target summary file according to modification instruction In;
Update module 23, for controlling target virtual machine according to the more new resources of the resource allocation information in target summary file Configuration.
The updating device of resources of virtual machine configuration provided in an embodiment of the present invention, has the configuration of above-mentioned resources of virtual machine more The beneficial effect of new method.
Fig. 3 is a kind of structure chart of the more new equipment of resources of virtual machine configuration provided in an embodiment of the present invention, such as Fig. 3 institute Show, a kind of more new equipment of resources of virtual machine configuration includes:
Memory 31, for storing computer program;
Processor 32 realizes the step of the update method such as the configuration of above-mentioned resources of virtual machine when for executing computer program Suddenly.
The more new equipment of resources of virtual machine configuration provided in an embodiment of the present invention, has the configuration of above-mentioned resources of virtual machine more The beneficial effect of new method.
In order to solve the above technical problems, the present invention also provides a kind of computer readable storage medium, computer-readable storage It is stored with computer program on medium, the update such as the configuration of above-mentioned resources of virtual machine is realized when computer program is executed by processor The step of method.
Computer readable storage medium provided in an embodiment of the present invention, the update method with the configuration of above-mentioned resources of virtual machine Beneficial effect.
It to the update method of resources of virtual machine provided by the present invention configuration, device, equipment and computer-readable deposits above Storage media is described in detail.Specific embodiment used herein explains the principle of the present invention and embodiment It states, the above description of the embodiment is only used to help understand the method for the present invention and its core ideas.It should be pointed out that for this skill For the those of ordinary skill in art field, without departing from the principle of the present invention, several change can also be carried out to the present invention Into and modification, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration ?.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered Think beyond the scope of this invention.

Claims (10)

1. a kind of update method of resources of virtual machine configuration characterized by comprising
When the modification instruction for the resource distribution for receiving modification target virtual machine, target summary file is created;
It is instructed according to the modification and stores updated resource allocation information into the target summary file;
The target virtual machine is controlled to be matched according to the resource allocation information update resource in the target summary file It sets.
2. the method according to claim 1, wherein further comprising:
The switching command for responding user, determines the first history summary file from multiple history summary files;Wherein, described to go through History summary file is the summary file of old version;
The target virtual machine is controlled to match using the resource allocation information update resource in the first history summary file It sets.
3. according to the method described in claim 2, it is characterized in that, further comprising:
The identification information correspondence of server where the target virtual machine is stored in the target summary file;
When receiving migration instruction, corresponding destination server is determined according to migration instruction;
The second history summary file is determined using identification information corresponding with the destination server;
The target virtual machine is controlled to match using the resource allocation information update resource in the second history summary file It sets.
4. according to the method described in claim 3, it is characterized in that, utilizing described first in the control target virtual machine Resource allocation information in history summary file updates the resource distribution later or in the control target virtual machine benefit After updating the resource distribution with the resource allocation information in the second history summary file, further comprise:
What deletion created after the first history summary file or the corresponding creation time of the second history summary file The summary file.
5. according to the method described in claim 4, it is characterized in that, further comprising:
The summary file is stored in resource pool.
6. according to the method described in claim 2, it is characterized in that, further comprising:
Show the different information between the summary file of adjacent version.
7. method according to any one of claims 1 to 6, which is characterized in that the creation target summary file is specifically wrapped It includes:
The title of the target summary file is set using the time of version number and/or the creation target summary file.
8. a kind of updating device of resources of virtual machine configuration characterized by comprising
Creation module, for when the modification instruction for the resource distribution for receiving modification target virtual machine, creation target summary to be literary Part;
Memory module stores updated resource allocation information to the target summary file for being instructed according to the modification In;
Update module, for controlling the target virtual machine according to the resource allocation information in the target summary file more New resources configuration.
9. a kind of more new equipment of resources of virtual machine configuration characterized by comprising
Memory, for storing computer program;
Processor realizes that resources of virtual machine as described in any one of claim 1 to 7 is matched when for executing the computer program The step of update method set.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium Program, the computer program realize resources of virtual machine configuration as described in any one of claim 1 to 7 when being executed by processor Update method the step of.
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CN115421859A (en) * 2022-09-13 2022-12-02 科东(广州)软件科技有限公司 Dynamic loading method and device of configuration file, computer equipment and storage medium
CN115421859B (en) * 2022-09-13 2024-02-13 科东(广州)软件科技有限公司 Dynamic loading method and device for configuration file, computer equipment and storage medium

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