CN117193641A - Mirror image cache write-in rate control method, device, equipment and storage medium - Google Patents
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Abstract
A mirror image cache writing rate control method, a device, equipment and a storage medium relate to the technical field of virtualization, and the method comprises the steps that when a target virtual machine mirror image file is required to be written into a target mirror image cache volume, the occupied user service bandwidth and the total bandwidth of a physical storage where the target mirror image cache volume is located are obtained; determining a target writing rate based on the occupied user service bandwidth and the total bandwidth; and writing the target virtual machine image file into a target image cache volume based on the target writing rate. The application carries out self-adaptive dynamic adjustment on the current mirror image cache writing rate through the target writing rate so as to avoid influencing the access of other services to storage due to the excessively fast mirror image cache writing rate, and further can effectively reduce the influence of the mirror image cache writing on user service IO.
Description
Technical Field
The present application relates to the field of virtualization technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling a mirror cache write rate.
Background
A virtualization platform is a software or hardware system that is primarily used to create and manage a virtualized environment, specifically providing a set of tools and functions for creating, configuring, and managing Virtual Machines (VMs) on physical hardware. The main objective of the virtualization platform is to abstract physical resources into virtual resources and allow multiple virtual machines to share physical hardware, so as to maximize the utilization rate of the resources and flexibly allocate the resources. The virtualized platform may provide higher resource utilization, better performance isolation, and more flexible resource adjustment than traditional physical servers.
The virtual machine image is a prefabricated file or data set of an operating system running on the virtual machine, usually exists in a file form and contains all components and configuration information required by the virtual machine, wherein common virtual machine image file types include qcow2, raw and the like; because the virtual machine image can be conveniently copied, backed up and migrated, the management and deployment of the virtual machine are more convenient and flexible. Virtual machine image caching refers to storing a copy of a virtual machine image in a storage system when virtual machines are created and managed using virtualization techniques. In order to increase the creation speed and efficiency of the virtual machine, the virtualization software typically caches the specified virtual machine image in the storage system, so that when the same virtual machine image needs to be used next time, the virtualization software can directly create a new storage volume based on the cached copy in the storage system, without loading the image file from the external location to the storage system again, thereby saving time and network resources and providing faster starting and creation time of the virtual machine.
In the related art, qcow2 file or block storage is mainly used as a disk of the virtual machine, so as to store the virtual machine mirror cache, and when writing the virtual machine mirror cache, the faster and better the writing rate is generally expected. However, since the IO written into the storage system occupies the total IO bandwidth of the storage system, when the written mirror cache and the storage IO of other services have a bandwidth competition relationship, the excessively fast mirror cache writing rate will affect the access of other services to the storage. It can be seen that how to adaptively adjust the rate of the virtual machine image cache is a current problem that needs to be solved.
Disclosure of Invention
The application provides a mirror image cache writing rate control method, device, equipment and storage medium, which are used for realizing self-adaptive adjustment of the mirror image cache rate of a virtual machine, so as to reduce the influence of mirror image cache writing on user service IO.
In a first aspect, an embodiment of the present application provides a mirrored cache write rate control method, where the mirrored cache write rate control method includes:
when a target virtual machine image file is required to be written into a target image cache volume, acquiring the occupied user service bandwidth and the total bandwidth of a physical memory where the target image cache volume is located;
determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
and writing the target virtual machine image file into a target image cache volume based on the target writing rate.
With reference to the first aspect, in an implementation manner, the determining the writing rate based on the occupied user service bandwidth and the total bandwidth includes:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
With reference to the first aspect, in an implementation manner, after the step of taking a difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth, the method further includes:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth.
With reference to the first aspect, in an implementation manner, the reserved bandwidth percentage is 10%.
In a second aspect, an embodiment of the present application provides a mirrored cache write rate control apparatus, where the mirrored cache write rate control apparatus includes:
the rate control module is used for acquiring the occupied user service bandwidth and the total bandwidth of the physical storage where the target mirror image cache volume is located when the target virtual machine mirror image file is required to be written into the target mirror image cache volume; determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
and the mirror image cache writing module is used for writing the target virtual machine mirror image file into a target mirror image cache volume based on the target writing rate.
With reference to the second aspect, in one embodiment, the rate control module is specifically configured to:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
With reference to the second aspect, in one embodiment, the rate control module is specifically further configured to:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth.
With reference to the second aspect, in one embodiment, the reserved bandwidth percentage is 10%.
In a third aspect, an embodiment of the present application provides a mirrored cache write rate control apparatus, where the mirrored cache write rate control apparatus includes a processor, a memory, and a mirrored cache write rate control program stored on the memory and executable by the processor, where the mirrored cache write rate control program, when executed by the processor, implements the steps of the mirrored cache write rate control method as described above.
In a fourth aspect, an embodiment of the present application provides a computer readable storage medium having a mirrored cache write rate control program stored thereon, where the mirrored cache write rate control program, when executed by a processor, implements the steps of mirrored cache write rate control as described above.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the target writing rate is determined through the occupied user service bandwidth on the physical storage where the target mirror image cache volume is located and the total bandwidth of the physical storage, and the current mirror image cache writing rate is subjected to self-adaptive dynamic adjustment based on the target writing rate, so that the influence of the excessively fast mirror image cache writing rate on the access of other services to storage is avoided, and the influence of the mirror image cache writing on user service IO is further effectively reduced.
Drawings
FIG. 1 is a flow chart of an embodiment of a mirrored cache write rate control method according to the present application;
FIG. 2 is a schematic diagram of a virtual machine corresponding to a virtual machine disk with a qcow2 file and an architecture between the disk and a mirror cache according to an embodiment of a mirror cache write rate control method of the present application;
FIG. 3 is a schematic diagram of a virtual machine corresponding to a disk of the virtual machine and an architecture between the disk and a mirror cache thereof according to an embodiment of a mirror cache write rate control method of the present application;
fig. 4 is a schematic hardware structure of a mirrored cache write rate control device according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In describing embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that the operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
In a first aspect, an embodiment of the present application provides a mirrored cache write rate control method.
In an embodiment, referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of a mirrored cache write rate control method according to the present application. As shown in fig. 1, the mirror cache write rate control method includes:
step S10: when a target virtual machine image file is required to be written into a target image cache volume, acquiring the occupied user service bandwidth and the total bandwidth of a physical memory where the target image cache volume is located;
step S20: determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
step S30: and writing the target virtual machine image file into a target image cache volume based on the target writing rate.
By way of example, it will be appreciated that virtual machine image caching can effectively reduce disk space usage, particularly when multiple virtual machines share the same base image, which can avoid copying the complete image in each virtual machine, as only one image need be stored and referenced when needed. In the storing of the virtual mirror cache, not only the qcow2 file but also the block storage may be used as a disk of the virtual machine.
It should be noted that, block storage is a storage technology, which divides data into blocks of a fixed size, and performs read-write operations in units of the blocks; in particular, in block storage, a storage device (e.g., hard disk, solid state drive, etc.) divides data into successive blocks, each block typically having the same size (e.g., 512 bytes or 4 KB); while block storage in a virtualized environment refers to connecting a storage device to a virtualization platform and using blocks on the storage device as disk images of a virtual machine, computer systems are typically connected to the block storage through block storage protocols (e.g., iSCSI, RBD, etc.) or using local storage. The block storage not only provides the functions of storage management, monitoring, snapshot, cloning and the like, the virtualization platform can easily realize the management of the block storage through the functions, and different storage volumes are distributed for different virtual machines, but also provides high performance, high availability and expandability, so that the virtual machines can realize flexible storage management and rapid data access.
When qcow2 files are used as the virtual machine disk, the qcow2 files are generally stored in a distributed file system or a local file system, and a pre-prepared virtual machine image qcow2 file is generally used as a virtual machine image cache, when the same image is used next time, the virtualization platform can create an external snapshot (i.e. a virtual machine system volume) by using the virtual machine image qcow2 file (i.e. a virtual machine image cache volume), and provide the newly created external snapshot for the virtual machine. Similarly, when using block storage as a virtual machine disk, an empty virtual machine image buffer volume is usually created in the block storage system before the virtual machine is created, and a qemu-img tool is used to write a virtual machine image file corresponding to the virtual machine into the created virtual machine image buffer volume, and when the same image is used next time, a new virtual machine system volume is created for the virtual machine by storing the provided snapshot function and based on the virtual machine image buffer volume. Wherein qemu-img is a command line tool for creating, converting and managing virtual disk image files that can handle conversion between multiple virtual disk format files, and is also commonly used for virtual machine system disk image writing.
It should be appreciated that whether qcow2 files are used as virtual machine disks or block stores are used as virtual machine disks, it is generally desirable to write faster and better when writing mirrored caches; however, since the IO written into the storage occupies the total IO bandwidth of the storage system, when the written mirror cache and the storage IO of other services have bandwidth competition, the excessively fast mirror cache writing rate will affect the access of other services to the storage. In this embodiment, the writing speed of the mirror cache is dynamically adjusted according to whether the IO written into the mirror cache has a bandwidth competition relationship with the storage IO of the current other service, so as to effectively reduce the influence of the writing of the mirror cache on the user service IO. The embodiment is to set an IO bandwidth detection module as shown in fig. 2 and fig. 3 in the storage system, so as to monitor the occupied real-time user service bandwidth on the physical memory in the storage system.
Specifically, when the virtualization platform adds a target virtual machine image file to a newly created virtual machine (such as VM1 in fig. 2 and 3), the storage volume controller creates an empty virtual machine image buffer volume (i.e., target image buffer volume) for the target virtual machine image file to be used for storing the target virtual machine image file written by qemu-img or the target virtual machine image file written by file.
Meanwhile, the storage volume controller will start the rate control module to obtain the occupied user service IO bandwidth and the IO total bandwidth of the physical storage on the physical storage where the target virtual machine image cache volume is located from the storage system, calculate the rate (i.e. the target writing rate) that can be used for qemu-img or file writing according to the total bandwidth and the currently occupied user service IO bandwidth, and update the rate to the image cache writing module, so that the image cache writing module adjusts the writing rate of qemu-img according to the updated target writing rate, that is, writes the target virtual machine image file into the target virtual machine image cache volume as the virtual machine image cache (such as the oscilloge-cache in fig. 2 and the oscilloge-cache-Vol in fig. 3) in the way of qemu-img or file. Wherein VM1-Disk in FIG. 3 represents the Disk of virtual machine 1, VM1-Vol represents the storage volume of virtual machine 1, and each virtual machine Disk has its corresponding storage volume.
In this embodiment, the target writing rate is determined by using the occupied user service bandwidth on the physical storage where the target mirror cache volume is located and the total bandwidth of the physical storage, and the current mirror cache writing rate is adaptively and dynamically adjusted based on the target writing rate, so as to avoid affecting the access of other services to the storage due to the excessively fast mirror cache writing rate, and further effectively reduce the influence of the mirror cache writing on the user service IO.
Further, in an embodiment, the determining the writing rate based on the occupied user service bandwidth and the total bandwidth includes:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
Exemplary, in this embodiment, after obtaining, by the rate control module, the user service IO bandwidth occupied on the physical storage where the target virtual machine mirror cache volume is located and the IO total bandwidth of the physical storage from the IO bandwidth detection module, subtracting the two, where the obtained difference is the target bandwidth that can be used for qemu-img or writing in the mirror cache in a file manner; and the target bandwidth can be used for calculating the rate which can be used for qemu-img or file mode writing. It can be appreciated that the statistical units of bandwidth are: bits per second (bps), such as 100 m=100 Mbps, if the target bandwidth is 1Mbps, then the theoretical target write rate is: 1 mbps=1024/8 kbps=128 KB/s.
Therefore, the embodiment dynamically adjusts the speed of writing the mirror image cache through the difference between the total bandwidth and the occupied user service bandwidth, so as to reduce the influence of writing the mirror image cache on user service IO; and under the condition that the space occupied by the virtual machine image is large, the writing speed of the image cache can be dynamically adjusted, so that the influence on user service IO can be better reduced.
Further, in an embodiment, after the step of taking the difference between the total bandwidth and the occupied user service bandwidth as the target bandwidth, the method further includes:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth. Wherein the reserved bandwidth percentage may preferably be 10%.
For example, in order to avoid that the mirror cache writes the IO bandwidth of the storage system completely, so as to ensure the smooth operation of the system, in this embodiment, a reserved bandwidth percentage is preset, that is, the IO bandwidth corresponding to the reserved bandwidth percentage is not used for writing the mirror cache. It should be noted that, the specific value of the reserved bandwidth percentage may be preferably set to 10% to ensure that there is enough IO bandwidth to ensure smooth running of the system, and may be set to other values, such as 5%, 20% or the like, according to actual requirements.
Therefore, after calculating the difference between the total bandwidth and the occupied user service bandwidth, the difference is updated by reserving the bandwidth percentage to determine the final target bandwidth; for example, the difference between the total bandwidth and the occupied user service bandwidth is 1Mbps and the reserved bandwidth percentage is 10%, the final target bandwidth is 1Mbps-1mbps×10% =0.9 Mbps, and then the writing rate of the mirror cache is calculated according to the final target bandwidth, and the current writing rate of the mirror cache is adjusted. Therefore, the embodiment updates the target bandwidth by reserving the bandwidth percentage, and can effectively ensure the stable operation of the system.
In a second aspect, an embodiment of the present application further provides a mirrored cache write rate control apparatus, where the mirrored cache write rate control apparatus includes:
the rate control module is used for acquiring the occupied user service bandwidth and the total bandwidth of the physical storage where the target mirror image cache volume is located when the target virtual machine mirror image file is required to be written into the target mirror image cache volume; determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
and the mirror image cache writing module is used for writing the target virtual machine mirror image file into a target mirror image cache volume based on the target writing rate.
Further, in an embodiment, the rate control module is specifically configured to:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
Further, in an embodiment, the rate control module is specifically further configured to:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth.
Further, in an embodiment, the reserved bandwidth percentage is 10%.
The function implementation of each module in the mirror cache write rate control device corresponds to each step in the mirror cache write rate control method embodiment, and the function and implementation process thereof are not described in detail herein.
In a third aspect, an embodiment of the present application provides a mirrored cache write rate control apparatus, which may be a device having a data processing function, such as a personal computer (personal computer, PC), a notebook computer, or a server.
Referring to fig. 4, fig. 4 is a schematic hardware structure of a mirrored cache write rate control apparatus according to an embodiment of the present application. In the embodiment of the application, the mirror cache write rate control device may include a processor, a memory, a communication interface, and a communication bus.
The communication bus may be of any type for implementing the processor, memory, and communication interface interconnections.
The communication interfaces include input/output (I/O) interfaces, physical interfaces, logical interfaces, and the like for implementing device interconnections within the mirrored cache write rate control device, and interfaces for implementing interconnection of the mirrored cache write rate control device with other devices (e.g., other computing devices or user devices). The physical interface may be an ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device may be a Display, a Keyboard (Keyboard), or the like.
The memory may be various types of storage media such as random access memory (randomaccess memory, RAM), read-only memory (ROM), nonvolatile RAM (non-volatileRAM, NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (electrically erasable PROM, EEPROM), and the like.
The processor may be a general-purpose processor, and the general-purpose processor may call a mirrored cache write rate control program stored in the memory, and execute the mirrored cache write rate control method provided by the embodiment of the present application. For example, the general purpose processor may be a central processing unit (central processing unit, CPU). The method executed when the mirrored cache write rate control program is called may refer to various embodiments of the mirrored cache write rate control method according to the present application, and will not be described herein.
Those skilled in the art will appreciate that the hardware configuration shown in fig. 4 is not limiting of the application and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In a fourth aspect, embodiments of the present application also provide a computer-readable storage medium.
The application stores the mirror image buffer write-in rate control program on the readable storage medium, wherein the mirror image buffer write-in rate control program realizes the steps of the mirror image buffer write-in rate control method when being executed by a processor.
The method implemented when the mirrored cache write rate control program is executed may refer to various embodiments of the mirrored cache write rate control method according to the present application, which are not described herein.
It should be noted that, the foregoing reference numerals of the embodiments of the present application are merely for describing the embodiments, and do not represent the advantages and disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The mirror cache write-in rate control method is characterized by comprising the following steps of:
when a target virtual machine image file is required to be written into a target image cache volume, acquiring the occupied user service bandwidth and the total bandwidth of a physical memory where the target image cache volume is located;
determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
and writing the target virtual machine image file into a target image cache volume based on the target writing rate.
2. The mirrored cache write rate control method of claim 1, wherein said determining a write rate based on said occupied user traffic bandwidth and said total bandwidth comprises:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
3. The mirrored cache write rate control method according to claim 2, further comprising, after said step of taking as a target bandwidth a difference between said total bandwidth and said occupied user traffic bandwidth:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth.
4. The mirrored cache write rate control method of claim 3, wherein said reserved bandwidth percentage is 10%.
5. The mirror cache write rate control device is characterized in that the mirror cache write rate control device comprises:
the rate control module is used for acquiring the occupied user service bandwidth and the total bandwidth of the physical storage where the target mirror image cache volume is located when the target virtual machine mirror image file is required to be written into the target mirror image cache volume; determining a target writing rate based on the occupied user service bandwidth and the total bandwidth;
and the mirror image cache writing module is used for writing the target virtual machine mirror image file into a target mirror image cache volume based on the target writing rate.
6. The mirrored cache write rate control apparatus of claim 5, wherein said rate control module is specifically configured to:
taking the difference between the total bandwidth and the occupied user service bandwidth as a target bandwidth;
and determining a target writing rate based on the target bandwidth.
7. The mirrored cache write rate control apparatus of claim 6, wherein said rate control module is further operable to:
and updating the target bandwidth according to a preset reserved bandwidth percentage to obtain a new target bandwidth, and executing the step of determining the target writing rate based on the target bandwidth based on the new target bandwidth.
8. The mirrored cache write rate control apparatus of claim 7, wherein said reserved bandwidth percentage is 10%.
9. A mirrored cache write rate control device comprising a processor, a memory, and a mirrored cache write rate control program stored on the memory and executable by the processor, wherein the mirrored cache write rate control program, when executed by the processor, implements the steps of the mirrored cache write rate control method according to any one of claims 1 to 4.
10. A computer readable storage medium, wherein a mirrored cache write rate control program is stored on the computer readable storage medium, wherein the mirrored cache write rate control program, when executed by a processor, implements the mirrored cache write rate control steps of any one of claims 1 to 4.
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| CN114168262A (en) * | 2021-12-03 | 2022-03-11 | 中国人寿保险股份有限公司上海数据中心 | Cloud platform mirror image cache management method based on LRU replacement algorithm |
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