CN103853497A - Disk mirror image block adjusting method, disk mirror image building method and relevant device - Google Patents

Abstract

The embodiment of the invention discloses a disk image block adjustment method, a disk image creation method and related equipment. in. A block adjustment method of a disk image, comprising: receiving an adjustment instruction to a block size of a first disk image; creating a second disk image, wherein the block size of the second disk image is the block size indicated by the adjustment instruction; The disk image copies the data stored in the first disk image, and the technical solution of the present invention is beneficial to improving the data read-write performance and storage space utilization rate of the disk image.

Description

Disk image block adjustment method, disk image creation method and related equipment

technical field

The invention relates to the technical field of computers, in particular to a disk image block adjustment method, a disk image creation method and related equipment.

Background technique

Virtualization technology is a decoupling technology that separates underlying hardware devices from upper-layer operating systems and applications. See Figure 1. The virtual machine monitor (VMM, Virtual Machine Monitor) layer is introduced to directly manage underlying hardware resources, creating hardware-independent The virtual machine (VM, Virtual Machine) is used by the upper operating system and applications.

One or more virtual computers, namely VMs, can be simulated on a physical computer through virtual machine software, and these VMs work like real computers. Operating systems and applications can be installed on VMs, and VMs can also Access network resources. To the applications running in the VM, the VM is like working on a real computer. Virtualization technology, as one of the underlying important supporting technologies of the popular cloud computing (Cloud Computing) platform, can greatly improve the resource utilization efficiency of physical devices. Compared with traditional physical computers, VM has better isolation and encapsulation,

A disk image (disk image) is a separate file that stores all the content and structure of a storage medium or device. It performs sector-to-sector copying of the source storage medium and can perfectly replicate the structure and content of the device. The virtualization software maps the corresponding disk image to the disk of the virtual machine through the corresponding disk driver. During the running of the VM, all reads and writes to the internal files of the VM can be converted into reads and writes to the disk image by the driver. In addition to all the data of the storage medium or device, the disk image also contains metadata (Metadata), where Metadata is defined as the information provision of one or more aspects of the data, and the data describing the data (data about data), Such as data creation time, creator and data meaning, etc., are used for its own data management, to realize the fast data reading of the disk image by the driver, and the realization of more advanced storage features. Using disk mirroring in conjunction with drivers under the virtualization platform can implement advanced features such as thin allocation and snapshots. The storage area in the disk image is divided in the form of blocks, and each block can correspond to several sectors.

The existing mainstream disk mirroring technology has a unified fixed block size. In the process of research and practice, the inventors of the present invention found that the disk mirroring adopts a uniform and fixed block size, which will affect the data read and write performance of the disk mirroring in some scenarios, and also affect the utilization rate of storage space in some scenarios.

Contents of the invention

Embodiments of the present invention provide a method for adjusting blocks of a disk image, a method for creating a disk image, and related equipment, in order to improve the data read and write performance and storage space utilization of the disk image.

The first aspect of the present invention provides a block adjustment method for disk mirroring, including:

receiving an adjustment instruction to the size of the first disk image block;

Create a second disk image, wherein the block size of the second disk image is the block size indicated by the adjustment instruction;

Copying the data stored in the first disk image to the second disk image.

With reference to the first aspect, in a first possible implementation manner,

Before receiving the instruction for adjusting the size of the first disk image block, it also includes:

receiving a disk image creation instruction; creating a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity satisfy preset correspondence;

or,

Receive a disk image creation instruction; create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the disk image creation instruction The indicated block size.

With reference to the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner, if the capacity of the first disk image is equal to S bytes, the blocks of the first disk image The size is equal to 2 ^m bytes, where 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, where n and m are positive integers.

With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner, the receiving After the adjustment instruction, it also includes: before the first disk image is closed, if a write operation instruction indicating to write the first data to the first disk image is received, and the first data has not been copied to the second disk image If the data stored in the first disk image is used, the first data is respectively written to the first disk image and the second disk image.

In combination with the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect or the third possible implementation manner of the first aspect, in the fourth possible implementation manner , when the first virtual machine is shut down, wherein the first virtual machine is a virtual machine using the first disk image, if the data stored in the first disk image has been copied to the second disk image , then close the second disk image; if the data stored in the first disk image has not been copied to the second disk image, the first disk can be copied to the second disk image After mirroring the stored data, turn off the second disk mirror.

A second aspect of the present invention provides a method for creating a disk image, including:

Receive a disk image creation instruction;

Create a first disk image, where the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity satisfy a preset corresponding relationship.

With reference to the second aspect, in a first possible implementation manner,

If the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, Wherein, said n and m are positive integers.

A third aspect of the present invention provides a method for creating a disk image, including:

Receive a disk image creation instruction;

Create a first disk image, where the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the block size indicated by the disk image creation instruction.

A fourth aspect of the present invention provides a block adjustment device for disk mirroring, which may include:

The receiving unit receives an instruction for adjusting the size of the first disk image block;

The creating unit is configured to create a second disk image, where the block size of the second disk image is the block size indicated by the adjustment instruction;

A data transfer unit, configured to copy the data stored in the first disk image to the second disk image.

With reference to the fourth aspect, in a first possible implementation manner,

The receiving unit is also used to receive a disk image creation instruction before receiving an instruction to adjust the block size of the first disk image; the creation unit is also used to create a first disk image, wherein the capacity of the first disk image For the capacity indicated by the disk image creation instruction, the block size of the first disk image and the capacity satisfy a preset corresponding relationship.

or,

The receiving unit is also used to receive a disk image creation instruction before receiving an instruction to adjust the block size of the first disk image; the creation unit is also used to create a first disk image, wherein the capacity of the first disk image The capacity indicated by the disk image creation instruction, the block size of the first disk image is the block size indicated by the disk image creation instruction.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the device further includes:

The data reading and writing unit is configured to, after the receiving unit receives an instruction to adjust the size of the first disk image block and before the first disk image is closed, if an instruction is received to write the first disk image to the first disk image A data write operation command, and the data stored in the first disk image has not been copied to the second disk image, then write the first disk image and the second disk image respectively to the first data.

A fifth aspect of the present invention provides a device for creating a disk image, which may include:

a receiving unit, configured to receive a disk image creation instruction;

The creation unit is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity meet a predetermined requirement. The corresponding relationship is set.

With reference to the fifth aspect, in a first possible implementation manner,

If the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, Wherein, said n and m are positive integers.

A sixth aspect of the present invention provides a device for creating a disk image, which may include:

a receiving unit, configured to receive a disk image creation instruction;

The creation unit is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the disk image creation instruction. The indicated block size.

As can be seen from the above, in the block adjustment scheme of the disk image in the embodiment of the present invention, after receiving the adjustment instruction to the block size of the first disk image, the second disk image is created according to the block size indicated by the adjustment instruction; The second disk image copies the data stored in the first disk image. Because the block size of the disk image is adjusted according to the needs of the block size adjustment command, this mechanism makes the block size of the disk image more flexible, which is conducive to better matching the needs of specific scenarios, and thus helps to improve the data read and write performance of the disk image and storage space utilization.

On the other hand, in a disk image creation solution provided by this embodiment, after receiving the disk image creation instruction, the first disk image is created according to the capacity indicated by the received disk image creation instruction, and the blocks of the first disk image There is a preset correspondence between the size and its capacity. Because the disk image with the corresponding capacity and block size is created according to the indicated capacity and the block size corresponding to the capacity, this disk image creation mechanism makes the block size of the created disk image more flexible, which is conducive to better matching the needs of specific scenarios , which in turn helps to improve the data read and write performance and storage space utilization of the disk image.

In yet another aspect, in another disk image creation solution provided by this embodiment, after receiving the disk image creation instruction, the first disk image is created according to the capacity and block size indicated by the received disk image creation instruction. Because the disk image is created as needed based on the indicated capacity and block size, this disk image creation mechanism makes the block size of the disk image more flexible. Mirror data read and write performance and storage space utilization.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flowchart of a method for adjusting blocks of a disk image provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a method for creating a disk image provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of another method for creating a disk image provided by an embodiment of the present invention;

FIG. 4 is a schematic flow chart of another disk image block adjustment method provided by an embodiment of the present invention;

Fig. 5-a is a schematic diagram of a disk image block adjustment device provided by an embodiment of the present invention;

Fig. 5-b is a schematic diagram of another disk image block adjustment device provided by an embodiment of the present invention;

Fig. 5-c is a schematic diagram of another disk image block adjustment device provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of a computer provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a device for creating a disk image provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of another computer provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of another device for creating a disk image provided by an embodiment of the present invention;

Fig. 10 is a schematic diagram of another computer provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a method for adjusting blocks of a disk image, a method for creating a disk image, and related equipment, in order to improve the data read and write performance and storage space utilization of the disk image.

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

Each will be described in detail below.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily to describe A particular order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method or system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

In an embodiment of the disk image block adjustment method of the present invention, a disk image block adjustment method may include: receiving an adjustment instruction for the block size of the first disk image; creating a second disk image, wherein the second disk image The block size is the block size indicated by the adjustment command; copying the data stored in the first disk image to the second disk image.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a block adjustment method for a disk image provided by an embodiment of the present invention. As shown in Figure 1, a block adjustment method of a disk image provided by an embodiment of the present invention may include the following:

101. Receive an instruction to adjust the size of the first disk image block;

In some embodiments of the present invention, the received adjustment command for the block size of the first disk image may include a block size indication, wherein the block size indication may be used to indicate the target block size to be adjusted (for example, 2 MB bytes , 4MB, 8MB or other block sizes). Wherein, the above-mentioned adjustment instruction for the block size of the first disk image may be issued by the disk image driver of the first disk image, or may be issued by a VM using the first disk image (for ease of reference, it may be referred to as the first VM), or may be issued by other Issued by an object or user. Further, the instruction for adjusting the block size of the first disk image may also include the identifier of the first disk image. Of course, other methods may also be used to determine whether to adjust the block size of the first disk image. For example, if the above-mentioned An instruction to adjust the block size of a disk image is issued by the first VM using the first disk image, and it may be assumed by default that the block size of the first disk image is to be adjusted. Or if the adjustment instruction of the block size of the first disk image includes the identification of the first VM using the first disk image, then it can be determined according to the identification of the first VM that the block size of the first disk image should be adjusted, and other methods can be And so on.

In some embodiments of the present invention, before receiving the instruction to adjust the block size of the first disk image, it may also include: receiving a disk image creation instruction; creating the first disk image, wherein the capacity of the first disk image is the disk image created The capacity indicated by the instruction, the block size of the first disk image and the above capacity satisfy a preset corresponding relationship.

For example, if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2n ^-1 < ^S≤2n , 9≤m≤n-17, Among them, n and m are positive integers. Of course, the block size of the first disk image and its capacity can also meet other preset correspondences, and examples are not given here. The main purpose is to match the block size and capacity of the created first disk image. .

For example, if the capacity of the first disk image is less than or equal to 256GB, the block size of the first disk image can be equal to 2MB; if the capacity of the first disk image is between 256GB and 512GB, the block size of the first disk image can be equal to 4MB; if the capacity of the first disk image is between 512GB and 1TB, the block size of the first disk image can be equal to 8MB; if the capacity of the first disk image is between 1TB and 2TB, the first disk The block size of the image can be equal to 16MB; if the capacity of the first disk image is between 2TB and 4TB, the block size of the first disk image can be equal to 32MB, and so on, of course not limited to the example correspondence.

In some other embodiments of the present invention, before receiving the instruction to adjust the block size of the first disk image, it may further include: receiving a disk image creation instruction; creating the first disk image, wherein the capacity of the first disk image is the disk image created The capacity indicated by the instruction, the block size of the first disk image is the block size indicated by the disk image creation instruction.

In some embodiments of the present invention, after receiving the disk image creation instruction, it is also possible to first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, if not, return the disk image creation failure command to indicate that the disk image cannot be created on demand, and if so, execute the steps of creating the first disk image.

In some embodiments of the present invention, after receiving the disk image creation instruction, the block size indicated by the first disk image block size adjustment instruction can also be judged first (for ease of description, the indicated block size is used for B to represent ) is equal to 2 to the x power, and if so, execute the step of creating the first disk image, wherein the block size of the first disk image created in this scenario is the block size B bytes indicated by the above disk image creation instruction; if No, and 2x ^-1 <B< ^2x , then for example, 2x ^-1 bytes or ^2xbytes can be used as the block size indicated by the adjustment instruction to perform the step of creating the first disk image, in this scenario The block size of the created first disk image is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

102. Create a second disk image;

Wherein, the block size of the second disk image is the block size indicated by the adjustment command.

In some embodiments of the present invention, the capacity of the created second disk image may be greater than or equal to the capacity of the first disk image.

In some embodiments of the present invention, after receiving the instruction for adjusting the block size of the first disk image block, it may be first determined whether the block size indicated by the block size adjustment instruction for the first disk image block is equal to 2 to the power of x, Wherein, x is a natural number, and x is preferably greater than or equal to 9; if not, the block size adjustment failure instruction of the first disk image can be returned to indicate that the block size cannot be adjusted as required, and if so, the step of creating the second disk image is executed.

In some other embodiments of the present invention, after receiving the instruction to adjust the block size of the first disk image block, the block size B indicated by the block size adjustment instruction of the first disk image block can be judged first (for ease of description, the indicated The block size is used to indicate whether B) is equal to 2 to the power of x, and if so, execute the step of creating the second disk image, where the block size of the second disk image created in this scenario is indicated by the above disk image creation command Block size B bytes; if not, and ^2x-1 <B< ^2x , then for example, 2x ^-1 bytes or ^2x bytes can be used as the block size indicated by the adjustment command to perform creation of the second disk image Steps, wherein the block size of the second disk image created in this scenario is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

103. Copy the data stored in the first disk image to the second disk image.

In some embodiments of the present invention, the data stored in the first disk image may be copied to the second disk image in a sector-to-sector copy manner. Further, after copying the data stored in the first disk image to the second disk image, the disk image used by the first VM using the first disk image can be converted to the second disk image, and the first disk image can be closed .

In some embodiments of the present invention, after receiving the instruction to adjust the block size of the first disk image, it may further include: before the first disk image is closed, if a write operation instruction indicating to write the first data to the first disk image is received , and the data stored in the first disk image has not been copied to the second disk image (the first disk image is still in the block size adjustment state), then the first disk image and the second disk image can be respectively written to the first a data. For example, after receiving an instruction to adjust the block size of the first disk image, the identifier of the first disk image and an indication of the block size adjustment state may be written in the image configuration file to identify that the first disk image is currently in block size adjustment state, and then you can determine that the first disk image is still in the block size adjustment state according to the identifier of the first disk image written in the image configuration file and the block size adjustment status indication. Of course, other methods can also be used to identify the first disk image Is in block resizing state. Further, after the data stored in the first disk image is copied to the second disk image, the data copy completion flag corresponding to the first disk image can be written into the image configuration file to mark the end of the first disk image block size adjustment . Subsequently, it may be determined that the block size adjustment of the first disk image has been completed according to the data copy completion flag corresponding to the first disk image written in the image configuration file.

In some embodiments of the present invention, when the first VM is shut down, if the data stored in the first disk image has been copied to the second disk image, the second disk image can be closed; After the data stored in the first disk image is finished, the second disk image can be closed after the data stored in the first disk image has been copied to the second disk image. Wherein, the first VM is a VM using the first disk image. For example, if after the data stored in the first disk image is copied to the second disk image, the data copy completion flag corresponding to the first disk image is written into the image configuration file, then when the first VM is shut down, the Read the mirror configuration file, if the data copy completion flag corresponding to the first disk mirror is written in the read mirror configuration file, then it is determined that the data stored in the first disk mirror has been copied to the second disk mirror (that is, the first disk image block size adjustment has been completed), if the image configuration file read does not write the data copy completion flag corresponding to the first disk image, then it is determined that the data stored in the first disk image has not been copied to the second disk image ( That is, the first disk image block resizing is not completed). Of course, other ways may also be used to identify whether the first disk image block size adjustment state has ended.

It can be seen that, in the block adjustment scheme of the disk image in this embodiment, after receiving the adjustment instruction to the block size of the first disk image, the second disk image is created according to the block size indicated by the adjustment instruction; Mirroring copies the data stored in the first disk image. Because the block size of the disk image is adjusted according to the needs of the block size adjustment command, this mechanism makes the block size of the disk image more flexible, which is conducive to better matching the needs of specific scenarios, and thus helps to improve the data read and write performance of the disk image and storage space utilization.

In an embodiment of the method for creating a disk image according to the present invention, a method for creating a disk image may include: receiving a disk image creation instruction; creating a first disk image, wherein the capacity of the first disk image is indicated by the above disk image creation instruction The capacity of the first disk image satisfies a preset corresponding relationship between the block size of the first disk image and the capacity.

Referring to FIG. 2 , FIG. 2 is a schematic flowchart of a method for creating a disk image provided by an embodiment of the present invention. As shown in Figure 2, a method for creating a disk image provided by an embodiment of the present invention may include the following:

201. Receive a disk image creation instruction.

In some embodiments of the present invention, the received disk image creation command may include a disk image capacity indication, wherein the disk image capacity indication indicates a target capacity of the requested disk image. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM that needs to use the disk image (for ease of reference, may be referred to as the first VM), or may be issued by other objects or users.

202. Create a first disk image, where the capacity of the first disk image is the capacity indicated by the above-mentioned disk image creation instruction, and the block size of the first disk image and the above-mentioned capacity satisfy a preset corresponding relationship.

In some embodiments of the present invention, the preset corresponding relationship between the block size and capacity of the first disk image can be as follows: if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, where 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, where n and m are positive integers. Of course, the block size of the first disk image and its capacity can also meet other preset correspondences, and examples are not given here. The main purpose is to match the block size and capacity of the created first disk image. .

For example, if the capacity of the first disk image is less than or equal to 256GB, the block size of the first disk image can be equal to 2MB; if the capacity of the first disk image is between 256GB and 512GB, the block size of the first disk image can be equal to 4MB; if the capacity of the first disk image is between 512GB and 1TB, the block size of the first disk image can be equal to 8MB; if the capacity of the first disk image is between 1TB and 2TB, the first disk The block size of the image can be equal to 16MB; if the capacity of the first disk image is between 2TB and 4TB, the block size of the first disk image can be equal to 32MB, and so on, of course not limited to the example correspondence.

It can be seen that in the disk image creation scheme of this embodiment, after receiving the disk image creation instruction, the first disk image is created according to the capacity indicated by the received disk image creation instruction, and the block size of the first disk image and its capacity are between Satisfy the preset corresponding relationship. Because the disk image with the corresponding capacity and block size is created according to the indicated capacity and the block size corresponding to the capacity, this disk image creation mechanism makes the block size of the created disk image more flexible, which is conducive to better matching the needs of specific scenarios , which in turn helps to improve the data read and write performance and storage space utilization of the disk image.

In another embodiment of the method for creating a disk image of the present invention, another method for creating a disk image may include: receiving a disk image creation instruction; creating a first disk image, wherein the capacity of the first disk image is equal to the above-mentioned disk image creation instruction For the capacity indicated, the block size of the first disk image is the block size indicated by the above disk image creation command.

Referring to FIG. 3 , FIG. 3 is a schematic flowchart of another method for creating a disk image provided by an embodiment of the present invention. As shown in Figure 3, another method for creating a disk image provided by an embodiment of the present invention may include the following:

301. Receive a disk image creation instruction.

In some embodiments of the present invention, the received disk image creation instruction may include a disk image capacity indication and a block size indication, wherein the disk image capacity indication indicates the target capacity of the requested disk image; wherein the block size indication Can be used to indicate the target block size to adjust to. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM (for ease of reference, referred to as the first VM) that needs to use the disk image to be created, or may be issued by other objects or users.

302. Create a first disk image, where the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the block size indicated by the disk image creation instruction.

In some embodiments of the present invention, after receiving the disk image creation instruction, it is also possible to first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, if not, return the disk image creation failure command to indicate that the disk image cannot be created on demand, and if so, execute the steps of creating the first disk image.

In other embodiments of the present invention, after receiving the disk image creation instruction, the block size indicated by the block size adjustment instruction of the first disk image can also be judged first (for ease of description, the indicated block size is used for B to represent ) is equal to 2 to the power of x, and if so, execute the step of creating the first disk image, wherein the block size of the first disk image created in this scenario is the block size B bytes indicated by the above disk image creation instruction; If not, and 2 ^x-1 <B<2 ^x , then for example, 2 ^x-1 bytes or 2 ^x bytes may be used as the block size indicated by the adjustment instruction to perform the step of creating the first disk image. In this scenario The block size of the first disk image created below is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

It can be seen that in the disk image creation scheme of this embodiment, after receiving the disk image creation instruction, the first disk image is created according to the capacity and block size indicated by the received disk image creation instruction. Because the disk image is created as needed based on the indicated capacity and block size, this disk image creation mechanism makes the block size of the disk image more flexible. Mirror data read and write performance and storage space utilization.

In order to facilitate a better understanding and implementation of the above solutions of the embodiments of the present invention, some application scenarios are given as examples below for introduction.

Referring to FIG. 4 , FIG. 4 is a schematic flowchart of another method for adjusting blocks of a disk image provided by an embodiment of the present invention. As shown in FIG. 4, another block adjustment method for a disk image provided by an embodiment of the present invention may include the following:

401. The disk image driver receives an instruction to adjust the size of block A of the disk image;

Wherein, it is assumed that the disk image A is currently used by the running first VM.

In some embodiments of the present invention, the received instruction to adjust the block size of the disk image A may include a block size indication, wherein the above block size indication may be used to indicate the target block size to be adjusted (for example, 2MB bytes, 4MB, 8MB or other block size).

402. The disk mirroring driver judges whether the size of the target block is equal to 2 to the power of x bytes;

Wherein, x is a natural number, preferably x is greater than or equal to 9;

If yes, execute step 403;

If not, go to step 404 .

403. The disk image driver prompts that the block size of disk image A cannot be adjusted as required.

404. The disk image driver writes the path, name and block adjustment state indication of disk image A in the image configuration file.

405. Create a disk image B;

Wherein, the block size of the disk image B is the block size indicated by the adjustment command, and the capacity of the disk image B is greater than or equal to the capacity of the disk image A.

406. The disk image driver starts a data copy thread to copy sectors from disk image A to disk image B.

In particular, when it is found that the corresponding sector of disk image B is already in use, copying data to this sector of disk image B can be skipped (because the data in this sector of disk image B may be the latest data), And continue to copy the data of other sectors.

407. After sector copying from disk image A to disk image B is completed, the disk image driver converts the disk image used by the first VM into disk image B. The disk mirroring driver writes the data copy completion flag corresponding to the disk mirroring A in the mirroring configuration file, to mark that the block size adjustment of the disk mirroring A is finished. The disk mirroring driver can also close the disk mirroring A.

In some embodiments of the present invention, before the disk mirroring A is closed, if the disk mirroring driver receives a write operation command indicating to write the first data to the disk mirroring A, and has not copied the disk mirroring B to the disk mirroring B and stored in the disk mirroring A (at this time, disk image A is still in the block size adjustment state), then the first data can be written to disk image A and disk image B respectively.

In some embodiments of the present invention, when the first VM is shut down, if the data stored in disk image A has been copied to disk image B (for example, the data copy completion flag corresponding to disk image A is written in the image configuration file), Then disk mirroring B can be closed; if the data stored in disk mirroring A has not been copied to disk mirroring B (for example, the path, name and block adjustment status indication of writing disk mirroring A are written in the mirroring configuration file, but If the data copy completion flag corresponding to disk image A is not written), you can close disk image B after copying the data stored in disk image A to disk image B.

For the first VM is in a state of standby or ready to shut down, in this state the first VM usually does not write data into the disk image, if the block size of the disk image is adjusted at this time, the maintenance of the image configuration file may not be necessary.

It can be understood that the above application scenarios are only examples, and in actual applications, adaptive adjustments may be made according to different schemes of the application scenarios.

In order to facilitate better implementation of the above solutions in the embodiments of the present invention, related devices for implementing the above solutions are also provided below.

Referring to Fig. 5-a, Fig. 5-a is a schematic diagram of a disk image block adjustment device 500 provided by an embodiment of the present invention. The disk image block adjustment device 500 may include: a receiving unit 510, a creation unit 520 and a data transfer unit 530.

Wherein, the receiving unit 510 receives an instruction to adjust the size of the first disk image block.

In some embodiments of the present invention, the instruction for adjusting the block size of the first disk image received by the receiving unit 510 may include a block size indication, where the block size indication may be used to indicate the target block size to be adjusted (for example 2MB bytes, 4MB, 8MB or other block sizes). Wherein, the above-mentioned adjustment instruction for the block size of the first disk image may be issued by the disk image driver of the first disk image, or may be issued by a VM using the first disk image (for ease of reference, it may be referred to as the first VM), or may be issued by other Issued by an object or user. Further, the instruction for adjusting the block size of the first disk image may also include the identifier of the first disk image. Of course, other methods may also be used to determine whether to adjust the block size of the first disk image. For example, if the above-mentioned An instruction to adjust the block size of a disk image is issued by the first VM using the first disk image, and it may be assumed by default that the block size of the first disk image is to be adjusted. Or if the adjustment instruction of the block size of the first disk image includes the identification of the first VM using the first disk image, then it can be determined according to the identification of the first VM that the block size of the first disk image should be adjusted, and other methods can be And so on.

The creating unit 520 creates a second disk image, wherein the block size of the second disk image is the block size indicated by the adjustment instruction.

The data transfer unit 530 is configured to copy the data stored in the first disk image to the second disk image.

In some embodiments of the present invention, the receiving unit 510 may also be configured to receive a disk image creation instruction before receiving an instruction to adjust the block size of the first disk image; the creation unit 520 may also be configured to create the first disk image, wherein the first The capacity of a disk image is the capacity indicated by the above-mentioned disk image creation instruction, and the block size of the first disk image satisfies a preset corresponding relationship with the above-mentioned capacity.

For example, if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2n ^-1 < ^S≤2n , 9≤m≤n-17, Among them, n and m are positive integers. Of course, the block size of the first disk image and its capacity can also satisfy other preset corresponding relationships, and examples are not given here. The main purpose is to create a correspondence between the block size and capacity of the first disk image. match.

In some other embodiments of the present invention, the receiving unit 510 is further configured to receive the disk image creation instruction before receiving the instruction for adjusting the block size of the first disk image; the creation unit 520 is also configured to create the first disk image, wherein, The capacity of the first disk image is the capacity indicated by the above disk image creation instruction, and the block size of the first disk image is the block size indicated by the above disk image creation instruction.

In some embodiments of the present invention, after the receiving unit 510 receives the disk image creation instruction, the creation unit 520 can first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, and if not, return the disk The image creation failure instruction indicates that the disk image cannot be created on demand, and if so, create the first disk image.

In some other embodiments of the present invention, after the receiving unit 510 receives the disk image creation instruction, the creation unit 520 may first determine the block size indicated by the block size adjustment instruction of the first disk image (for ease of description, indicate The block size of B is used to indicate whether it is equal to 2 to the power of x, and if so, create the first disk image, where the block size of the first disk image created in this scenario is the block size indicated by the above disk image creation command B bytes; if not, and 2 ^x-1 <B<2 ^x , then for example, 2 ^x-1 bytes or 2 ^x bytes can be used as the block size indicated by the adjustment instruction to create the first disk image, this The block size of the first disk image created in the scenario is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

Referring to FIG. 5-b, in some other embodiments of the present invention, the disk image block adjustment device 500 may further include: a data reading and writing unit 540, which is used to receive an adjustment instruction for the first disk image block size at the receiving unit 510 Afterwards, and before the first disk image is closed, if a write operation command indicating to write the first data to the first disk image is received, and the data stored in the first disk image has not been copied to the second disk image, then Writing first data to the first disk image and the second disk image respectively.

Referring to FIG. 5-c, in some other embodiments of the present invention, the block adjustment device 500 for disk mirroring may further include: a management unit 550, configured to shut down the first virtual machine, wherein the first virtual machine uses the second For a virtual machine with a disk image, if the data stored in the first disk image has been copied to the second disk image, the second disk image is turned off; if the data stored in the first disk image has not been copied to the second disk image , after the data stored in the first disk image is copied to the second disk image, the second disk image can be closed.

For example, after receiving an instruction to adjust the block size of the first disk image, the management unit 550 may write the identifier of the first disk image and an indication of the block size adjustment state in the image configuration file to identify the current first disk image The image is in the block size adjustment state, and you can determine that the first disk image is still in the block size adjustment state according to the identifier and block size adjustment state of the first disk image written in the image configuration file. Of course, other methods can also be used to Identifies whether the first disk image is in block resizing state. Further, after the data transfer unit 530 copies the data stored in the first disk image to the second disk image, the management unit 550 can write the data copy completion flag corresponding to the first disk image into the image configuration file to identify the second disk image. A disk image block resizing is complete. Subsequently, it may be determined that the block size adjustment of the first disk image has been completed according to the data copy completion flag corresponding to the first disk image written in the image configuration file.

If after copying the data stored in the first disk image to the second disk image, the management unit 550 writes the data copy completion flag corresponding to the first disk image to the image configuration file, then when the first VM is shut down, the management unit 550 can read the image configuration file, if the data copy completion mark corresponding to the first disk image is written in the read image configuration file, then it is determined that the data stored in the first disk image has been copied to the second disk image (i.e. The block size adjustment of the first disk image has been completed), if the image configuration file read does not write the data copy completion flag corresponding to the first disk image, it is determined that the data stored in the first disk image has not been copied to the second disk image data (i.e. first disk image block resizing not completed). Of course, the management unit 550 may also use other methods to identify whether the first disk image block size adjustment state has ended.

It can be understood that the functions of the functional modules of the block adjustment device 500 for disk mirroring in this embodiment can be specifically implemented according to the method in the above-mentioned method embodiment, and the specific implementation process can refer to the relevant description of the above-mentioned method embodiment, here No longer.

Referring to FIG. 6, FIG. 6 is a schematic diagram of a computer 600 provided by an embodiment of the present invention. The computer 600 may include an input device 610, an output device 620, a memory 630, and a processor 640 (the number of processors 640 in the computer may be one or more, one processor is taken as an example in Figure 6). In some embodiments of the present invention, the input device 610 , the output device 620 , the memory 630 and the processor 640 may be connected through a bus or in other ways, wherein connection through a bus is taken as an example in FIG. 6 .

Wherein, the processor 640 performs the following steps:

Receive an adjustment instruction to the block size of the first disk image; create a second disk image, wherein the block size of the second disk image is the block size indicated by the above adjustment instruction; copy the data stored in the first disk image to the second disk image data.

In some embodiments of the present invention, the instruction for adjusting the block size of the first disk image received by the processor 640 may include a block size indication, where the block size indication may be used to indicate the target block size to be adjusted (for example 2MB bytes, 4MB, 8MB or other block sizes). Wherein, the above-mentioned adjustment instruction for the block size of the first disk image may be issued by the disk image driver of the first disk image, or may be issued by a VM using the first disk image (for ease of reference, it may be referred to as the first VM), or may be issued by other Issued by an object or user. Further, the instruction for adjusting the block size of the first disk image may also include the identifier of the first disk image. Of course, other methods may also be used to determine whether to adjust the block size of the first disk image. For example, if the above-mentioned An instruction to adjust the block size of a disk image is issued by the first VM using the first disk image, and it may be assumed by default that the block size of the first disk image is to be adjusted. Or if the adjustment instruction of the block size of the first disk image includes the identifier of the first VM using the first disk image, the processor 640 can determine according to the identifier of the first VM whether to adjust the block size of the first disk image, Other ways can be deduced by analogy.

In some embodiments of the present invention, before receiving the instruction to adjust the size of the first disk image block, the processor 640 may also perform the following steps:

Receiving a disk image creation instruction; creating a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the above-mentioned capacity satisfy a preset corresponding relationship.

For example, if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2n ^-1 < ^S≤2n , 9≤m≤n-17, Among them, n and m are positive integers. Of course, the block size of the first disk image and its capacity can also meet other preset correspondences, and examples are not given here. The main purpose is to match the block size and capacity of the created first disk image. .

In other embodiments of the present invention, the processor 640 may further perform the following steps before receiving the instruction for adjusting the size of the first disk image block:

Receive a disk image creation instruction; create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the block size indicated by the disk image creation instruction.

In some embodiments of the present invention, after receiving the disk image creation instruction, the processor 640 can first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, if not, it can return to the disk image A failure instruction is created to indicate that the disk image cannot be created on demand, and if so, the step of creating the first disk image is executed.

In some embodiments of the present invention, after receiving the disk image creation instruction, the processor 640 may first determine the block size indicated by the first disk image block size adjustment instruction (for ease of description, the indicated block size is used for B indicates whether) is equal to 2 to the power of x, and if so, execute the step of creating the first disk image, where the block size of the first disk image created in this scenario is the block size B indicated by the above disk image creation command section; if not, and 2 ^x-1 <B<2 ^x , then for example, 2 ^x-1 bytes or 2 ^x bytes can be used as the block size indicated by the adjustment instruction to perform the step of creating the first disk image, The block size of the first disk image created in this scenario is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

In some embodiments of the present invention, the processor 640 may copy the data stored in the first disk image to the second disk image in a sector-to-sector copy manner. Further, after copying the data stored in the first disk image to the second disk image, the disk image used by the first VM using the first disk image can be converted to the second disk image, and the first disk image can be closed .

In some embodiments of the present invention, after receiving the instruction to adjust the block size of the first disk image, the processor 640 may further include: before closing the first disk image, if receiving an instruction to write the first data to the first disk image Write operation command, and the data stored in the first disk image has not been copied to the second disk image (at this time, the first disk image is still in the block size adjustment state), then the first disk image and the second disk image can be respectively Write first data. For example, after receiving an instruction to adjust the block size of the first disk image, the processor 640 may write the identifier of the first disk image and an indication of the block size adjustment state in the image configuration file to identify that the current first disk image is in block size adjustment state, the follow-up processor 640 can determine that the first disk image is still in the block size adjustment state according to the identification of the first disk image written in the image configuration file and the block size adjustment state indication, of course, other methods can also be used to identify whether the first disk image is in block resizing state. Further, after copying the data stored in the first disk image to the second disk image, the processor 640 can write the data copy completion flag corresponding to the first disk image to the image configuration file to identify the first disk image block Resizing is complete. The subsequent processor 640 may determine that the block size adjustment of the first disk image has been completed according to the data copy completion flag corresponding to the first disk image written in the image configuration file.

In some embodiments of the present invention, when the first VM is shut down, if the data stored in the first disk image has been copied to the second disk image, the processor 640 can close the second disk image; After the disk image has copied the data stored in the first disk image, the processor 640 may close the second disk image after copying the data stored in the first disk image to the second disk image. Wherein the first VM is a VM using the first disk image.

It can be understood that the functions of the functional modules of the computer 600 in this embodiment can be specifically implemented according to the method in the above method embodiment, and the specific implementation process can refer to the relevant description of the above method embodiment, and will not be repeated here.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a disk image creation device 700 provided by an embodiment of the present invention. The disk image creation device 700 may include:

A receiving unit 710 and a creating unit 720 .

Wherein, the receiving unit 710 is configured to receive a disk image creation instruction.

In some embodiments of the present invention, the disk image creation instruction received by the receiving unit 710 may include a disk image capacity indication, wherein the disk image capacity indication indicates the target capacity of the requested disk image. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM that needs to use the disk image (for ease of reference, may be referred to as the first VM), or may be issued by other objects or users.

The creation unit 720 is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the above disk image creation instruction, and the block size of the first disk image and the above capacity satisfy a preset corresponding relationship.

In some embodiments of the present invention, the preset corresponding relationship between the block size and capacity of the first disk image can be as follows: if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, where 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, where n and m are positive integers. Of course, the block size of the first disk image and its capacity can also meet other preset correspondences, and examples are not given here. The main purpose is to match the block size and capacity of the created first disk image. .

It can be understood that the functions of each functional module of the disk image creation apparatus 700 of this embodiment can be specifically implemented according to the method in the above-mentioned method embodiment, and the specific implementation process can refer to the relevant description of the above-mentioned method embodiment, and will not be repeated here. repeat.

Referring to FIG. 8, FIG. 8 is a schematic diagram of a computer 800 provided by an embodiment of the present invention. The computer 800 may include an input device 810, an output device 820, a memory 830, and a processor 840 (the number of processors 840 in the computer may be one or more, one processor is taken as an example in Figure 8). In some embodiments of the present invention, the input device 810 , the output device 820 , the memory 830 and the processor 840 may be connected via a bus or in other ways, wherein connection via a bus is taken as an example in FIG. 8 .

Wherein, the processor 840 performs the following steps:

Receive a disk image creation instruction; create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the above disk image creation instruction, and the block size of the first disk image and the above capacity satisfy a preset corresponding relationship.

In some embodiments of the present invention, the disk image creation command received by the processor 840 may include a disk image capacity indication, wherein the disk image capacity indication indicates the target capacity of the requested disk image. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM that needs to use the disk image (for ease of reference, may be referred to as the first VM), or may be issued by other objects or users.

In some embodiments of the present invention, the preset corresponding relationship between the block size and capacity of the first disk image can be as follows: if the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, where 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, where n and m are positive integers. Of course, the block size of the first disk image and its capacity can also satisfy other preset corresponding relationships, and examples are not given here. The main purpose is to create a correspondence between the block size and capacity of the first disk image. match.

It can be understood that the functions of the functional modules of the computer 800 in this embodiment can be specifically implemented according to the method in the above method embodiment, and the specific implementation process can refer to the relevant description of the above method embodiment, and will not be repeated here.

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of another disk image creation device 900 according to an embodiment of the present invention. The disk image creation device 900 may include: a receiving unit 910 and a creation unit 920 .

Wherein, the receiving unit 910 is configured to receive a disk image creation instruction.

In some embodiments of the present invention, the disk image creation instruction received by the receiving unit 910 may include a disk image capacity indication and a block size indication, wherein the disk image capacity indication indicates the target capacity of the requested disk image; wherein, the above A block size indication can be used to indicate the target block size to adjust to. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM (for ease of reference, referred to as the first VM) that needs to use the disk image to be created, or may be issued by other objects or users.

The creation unit 920 is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the block size indicated by the disk image creation instruction.

In some embodiments of the present invention, after the receiving unit 910 receives the disk image creation instruction, the creation unit 920 can also first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, if not, then A disk image creation failure instruction may be returned (indicating that the disk image cannot be created on demand), and if so, the first disk image is created.

In other embodiments of the present invention, after the receiving unit 910 receives the disk image creation instruction, the creation unit 920 may determine the block size indicated by the first disk image block size adjustment instruction (for ease of description, the indicated block The size is used to indicate whether B) is equal to 2 to the power of x, and if so, create the first disk image, where the block size of the first disk image created in this scenario is the block size B indicated by the above disk image creation command section; if not, and 2 ^x-1 <B<2 ^x , then for example, 2 ^x-1 bytes or 2 ^x bytes can be used as the block size indicated by the adjustment command to create the first disk image, in this scenario The block size of the created first disk image is 2 ^x-1 or 2 ^x bytes. Wherein, the above-mentioned x is a natural number, preferably x is greater than or equal to 9.

It can be understood that the functions of the functional modules of the disk image creation apparatus 900 in this embodiment can be specifically implemented according to the method in the above-mentioned method embodiment, and the specific implementation process can refer to the relevant description of the above-mentioned method embodiment, and will not be repeated here. repeat.

Referring to FIG. 10, FIG. 10 is a schematic diagram of a computer 1000 provided by an embodiment of the present invention. The computer 1000 may include an input device 1010, an output device 1020, a memory 1030, and a processor 1040 (the number of processors 1040 in the computer may be one or more, one processor is taken as an example in Figure 10). In some embodiments of the present invention, the input device 1010 , the output device 1020 , the memory 1030 and the processor 1040 may be connected via a bus or in other ways, wherein connection via a bus is taken as an example in FIG. 10 .

Wherein, the processor 1040 performs the following steps:

Receive a disk image creation instruction; create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the above disk image creation instruction, and the block size of the first disk image is the block size indicated by the above disk image creation instruction.

In some embodiments of the present invention, the disk image creation instruction received by the processor 1040 may include a disk image capacity indication and a block size indication, wherein the disk image capacity indication indicates the target capacity of the requested disk image; wherein, the above A block size indication can be used to indicate the target block size to adjust to. Wherein, the above-mentioned disk image creation instruction may be issued by, for example, a disk image driver, or may be issued by a VM (for ease of reference, referred to as the first VM) that needs to use the disk image to be created, or may be issued by other objects or users.

In some embodiments of the present invention, after receiving the disk image creation instruction, the processor 1040 can also first judge whether the block size indicated by the disk image creation instruction is equal to 2 to the power of x, and if not, return to the disk image A failure instruction is created to indicate that the disk image cannot be created on demand, and if so, the step of creating the first disk image is executed.

In other embodiments of the present invention, after receiving the disk image creation instruction, the processor 1040 may first determine the block size indicated by the first disk image block size adjustment instruction (for ease of description, the indicated block size is represented by Indicated by B) is equal to 2 to the power of x, if so, execute the step of creating the first disk image, wherein the block size of the first disk image created in this scenario is the block size B indicated by the above disk image creation command byte; if not, and 2 ^x-1 <B<2 ^x , then for example, 2 ^x-1 bytes or 2 ^x bytes can be used as the block size indicated by the adjustment instruction to perform the step of creating the first disk image , the block size of the first disk image created in this scenario is 2 ^x-1 or 2 ^x bytes. Wherein, x is a natural number, preferably x is greater than or equal to 9.

It can be understood that the functions of the functional modules of the computer 1000 in this embodiment can be specifically implemented according to the methods in the above method embodiments, and the specific implementation process can refer to the relevant descriptions of the above method embodiments, and will not be repeated here.

An embodiment of the present invention also provides a computer storage medium, wherein the computer storage medium can store a program, and when the program is executed, it includes part or all of the disk image block adjustment method or the disk image creation method described in the above method embodiment step.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the above integrated units are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for enabling a computer device (which may be a personal computer, server or network device, etc.) to execute all or part of the steps of the above-mentioned methods in various embodiments of the present invention. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .

The above, the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments. The technical solutions described in the embodiments are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (14)

1. A block adjustment method of disk mirroring, characterized in that, comprising: receiving an adjustment instruction to the size of the first disk image block; Create a second disk image, wherein the block size of the second disk image is the block size indicated by the adjustment instruction; Copying the data stored in the first disk image to the second disk image. 2. The method of claim 1, wherein, Before receiving the instruction for adjusting the size of the first disk image block, it also includes: receiving a disk image creation instruction; creating a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity satisfy preset correspondence; or, Receive a disk image creation instruction; create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the disk image creation instruction The indicated block size. 3. The method of claim 2, wherein, If the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, Wherein, said n and m are positive integers. 4. The method according to any one of claims 1 to 3, characterized in that, After receiving the adjustment instruction to the size of the first disk image block, it also includes: Before the first disk image is closed, if a write operation command indicating to write the first data to the first disk image is received, and the first disk image has not been copied to the second disk image If the stored data is stored, write the first data to the first disk image and the second disk image respectively. 5. The method according to any one of claims 1 to 4, characterized in that, When the first virtual machine is shut down, wherein the first virtual machine is a virtual machine using the first disk image, if the data stored in the first disk image has been copied to the second disk image, Then close the second disk image; if the data stored in the first disk image has not been copied to the second disk image, the first disk image can be copied to the second disk image After storing the data in, turn off the second disk mirror. 6. A method for creating a disk image, comprising: Receive a disk image creation instruction; Create a first disk image, where the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity satisfy a preset corresponding relationship. 7. The method of claim 6, wherein, If the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, Wherein, said n and m are positive integers. 8. A method for creating a disk image, comprising: Receive a disk image creation instruction; Create a first disk image, where the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the block size indicated by the disk image creation instruction. 9. A block adjustment device for disk mirroring, characterized in that it comprises: The receiving unit receives an instruction for adjusting the size of the first disk image block; The creating unit is configured to create a second disk image, where the block size of the second disk image is the block size indicated by the adjustment instruction; A data transfer unit, configured to copy the data stored in the first disk image to the second disk image. 10. The apparatus of claim 9, wherein: The receiving unit is also used to receive a disk image creation instruction before receiving an instruction to adjust the block size of the first disk image; the creation unit is also used to create a first disk image, wherein the capacity of the first disk image For the capacity indicated by the disk image creation instruction, the block size of the first disk image and the capacity satisfy a preset corresponding relationship. or, The receiving unit is also used to receive a disk image creation instruction before receiving an instruction to adjust the block size of the first disk image; the creation unit is also used to create a first disk image, wherein the capacity of the first disk image The capacity indicated by the disk image creation instruction, the block size of the first disk image is the block size indicated by the disk image creation instruction. 11. Apparatus according to claim 9 or 10, characterized in that, The device also includes: The data reading and writing unit is configured to, after the receiving unit receives an instruction to adjust the size of the first disk image block and before the first disk image is closed, if an instruction is received to write the first disk image to the first disk image A data write operation command, and the data stored in the first disk image has not been copied to the second disk image, then write the first disk image and the second disk image respectively to the first data. 12. A device for creating a disk image, comprising: a receiving unit, configured to receive a disk image creation instruction; The creation unit is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image and the capacity meet a predetermined requirement. The corresponding relationship is set. 13. The device of claim 12, wherein: If the capacity of the first disk image is equal to S bytes, then the block size of the first disk image is equal to 2 ^m bytes, wherein, 2 ^n-1 <S≤2 ⁿ , 9≤m≤n-17, Wherein, said n and m are positive integers. 14. A device for creating a disk image, comprising: a receiving unit, configured to receive a disk image creation instruction; The creation unit is configured to create a first disk image, wherein the capacity of the first disk image is the capacity indicated by the disk image creation instruction, and the block size of the first disk image is the disk image creation instruction. The indicated block size.

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