CN103713952A - Virtual disk distributed-memory method based on UFS (Universal Flash Storage) - Google Patents

Abstract

The invention discloses a UFS-based virtual disk distributed storage method: respectively create a UFS-based virtual disk repository and a UFS-based ISO file repository in a XenServer platform; when a virtual machine needs to be created, the XenServer The platform applies for a disk space of a predetermined size from the virtual disk storage repository, and obtains the installation system of the virtual machine from the ISO file storage repository; completes the installation system according to the applied disk space and the obtained installation system Creation of virtual machines. The scheme of the present invention can integrate the characteristics of the XenServer platform and UFS, thereby improving the storage performance.

Description

A distributed storage method of virtual disk based on UFS

technical field

The invention relates to storage technology, in particular to a UFS-based virtual disk distributed storage method.

Background technique

Cloud storage is a new concept extended and developed on the concept of cloud computing (Cloud Computer), which refers to the integration of a large number of different types of storage devices in the network A system in which application software works together to provide data storage and business access functions.

Compared with traditional storage devices, cloud storage is not only a piece of hardware, but a complex system composed of network devices, storage devices, servers, application software, public access interfaces, access networks, and client programs.

Uit Distributed File System (UFS, Uit Distributed File System) is a widely used distributed file system, which has the characteristics of high reliability, strong scalability, and high availability.

The XenServer platform is a newly developed server virtualization management platform, which is implemented based on the powerful XenHypervisor program. As an enterprise-level virtualization platform, it has the characteristics of fast, safe and efficient.

At present, cloud storage is showing a development trend of virtualization. In view of the above characteristics of the XenServer platform and UFS, if the two can be combined, that is, with the help of the XenServer platform, UFS-based virtualized distributed storage for cloud storage services will be realized. It will have very important practical significance, but there is no corresponding solution in the prior art.

Contents of the invention

In view of this, the present invention provides a UFS-based virtual disk distributed storage method, which can integrate the characteristics of the XenServer platform and UFS, thereby improving storage performance.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for distributed storage of virtual disks based on UFS, comprising:

Create a UFS-based virtual disk repository and a UFS-based ISO file repository on the XenServer platform;

When a virtual machine needs to be created, apply for a disk space of a predetermined size from the virtual disk repository through the XenServer platform, and obtain the installation system of the virtual machine from the ISO file repository; according to the application disk space and the obtained installation system to complete the creation of the virtual machine.

It can be seen that by adopting the solution of the present invention, UFS-based virtual disk distributed storage can be realized by means of the XenServer platform, so that the characteristics of the XenServer platform and UFS can be integrated, so that the storage of the virtual machine has high reliability, strong scalability, Features such as high availability, speed, and security improve storage performance.

Description of drawings

FIG. 1 is a flow chart of an embodiment of a UFS-based virtual disk distributed storage method of the present invention.

FIG. 2 is a schematic diagram of a storage structure of an existing XenServer platform.

Detailed ways

In order to make the technical solution of the present invention more clear and understandable, the solution of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

FIG. 1 is a flow chart of an embodiment of a UFS-based virtual disk distributed storage method of the present invention. As shown in Figure 1, the following steps 11-12 are included.

Step 11: Create a UFS-based virtual disk repository and a UFS-based ISO file repository on the XenServer platform.

The size of the virtual disk repository and the ISO file repository can be determined according to actual needs.

A container called a storage repository (SR) is defined in the XenServer platform to describe a specific storage target for storing virtual disk images.

FIG. 2 is a schematic diagram of a storage structure of an existing XenServer platform. As shown in Figure 2, the physical block device (PBD) represents the interface between the server and the connected storage repository, and the server refers to the XenServer host; the virtual disk image (VDI) is the storage abstraction displayed to the virtual machine (VM), Is the basic unit of virtualized storage in the XenServer platform; a virtual block device (VBD) is a connector object for mapping between a virtual disk image and a virtual machine.

The UFS-based virtual disk distributed storage proposed in the scheme of the present invention is to let the storage library represent UFS. If the user creates a UFS-based storage library, then any operation on the storage library is an operation on UFS.

In this step, a UFS-based virtual disk repository and a UFS-based ISO file repository can be created respectively. The reason why it is called an ISO file repository is that it is only used to store ISO files. Add the required ISO files in the repository.

Step 12: When a virtual machine needs to be created, apply for a disk space of a predetermined size from the virtual disk repository through the XenServer platform, and obtain the installation system of the virtual machine from the ISO file repository; according to the applied disk space and the obtained installation system to complete the creation of the virtual machine.

When a user needs to create a virtual machine, he can apply for a disk space corresponding to the size of the virtual machine to be created from the virtual disk repository through the XenServer platform, and obtain the virtual machine from the ISO file repository through the XenServer platform After that, the creation of the virtual machine can be completed according to the applied disk space and the obtained installation system. How to create it is an existing technology.

Each virtual machine can include multiple virtual disks, and the size of each virtual disk can be determined according to actual needs, and can be set during the creation of the virtual machine.

A virtual disk is a folder in UFS. For example: Assuming a virtual machine is a Windows operating system, then its c disk and d disk are respectively a virtual disk, which are folder c and folder d mapped to it in UFS.

Multiple virtual machines can be created in the above manner according to actual needs.

Subsequently, for each created virtual machine, other processing can be further performed, such as: increasing disk space, taking snapshots, and migrating, etc., which are respectively introduced as follows.

1) Increase disk space

For each virtual machine, if the user finds that the disk space of the virtual machine is not enough in actual application and needs to increase the disk space of the virtual machine, he can apply for the required additional disk space from the virtual disk repository through the XenServer platform .

For example, if the original disk space of a virtual machine is 10G, and now you want to expand it to 15G, then you can apply for 5G disk space through the XenServer platform. After the application is successful, the disk space of the virtual machine will become 15G.

2) snapshot

For each virtual machine, users can create a snapshot of the virtual machine through the XenServer platform.

The snapshot of the virtual machine refers to the record of the virtual machine at a certain point in time, which can play the role of virtual machine backup and so on.

For example: Assuming that a snapshot needs to be created for a virtual machine, then the snapshot file of the virtual machine can be generated through the virtual machine snapshot function of the XenServer platform and stored in UFS to support the backup and restoration of the virtual machine.

3) Migration

For each virtual machine, users can migrate the virtual machine through the XenServer platform.

Migration of virtual machines means that virtual machines can be migrated to virtual platforms in different physical environments, which can effectively manage resources and manage reliability. The XenServer platform realizes the migration function of virtual machines.

Based on the above introduction, it can be seen that in order to realize the solution of the present invention, it is necessary to carry out some transformations on the existing XenServer platform, such as adding a UFS-based storage library, and adding the required UFS operation interface and UFS protocol implementation interface in the XenServer platform, etc. Correspondingly, the XenServer platform completes required operations, that is, the above-mentioned various operations, by calling the interface.

The UFS operation interface may include:

1) handles (type), load (sr_uuid), check_server (), create (sr_uuid, size), delete (sr_uuid), attach (sr_uuid), detach (sr_uuid), probe (), vdi (uuid, loadLocked), validate_remotepath (), scan(uuid);

2) attach (sr_uuid, vdi_uuid), enerata_config (sr_uuid, vdi_uuid), attach_from_config (sr_uuid, vdi_uuid);

Among them, 1) mainly for the storage library, 2) mainly for the virtual disk, a VDI can be understood as a virtual disk;

The UFS protocol implementation interface may include:

open(vdi_uuid), create(vdi_uuid), read(vdi_uuid), write(vdi_uuid);

The meanings of the above interfaces are well known in the art.

For users, they only need to operate on the XenServer platform, and don't need to care about how the background is processed.

In a word, by adopting the solution of the present invention, UFS-based virtual disk distributed storage can be realized by means of the XenServer platform, so that the characteristics of the XenServer platform and UFS can be integrated, so that the storage of the virtual machine has high reliability, strong scalability, Features such as high availability, speed, and security improve storage performance.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. A UFS-based virtual disk distributed storage method, characterized in that, comprising: Create a UFS-based virtual disk repository and a UFS-based ISO file repository on the XenServer platform; When a virtual machine needs to be created, apply for a disk space of a predetermined size from the virtual disk repository through the XenServer platform, and obtain the installation system of the virtual machine from the ISO file repository; according to the application disk space and the obtained installation system to complete the creation of the virtual machine. 2. The method of claim 1, wherein, After the creation of the virtual machine is completed, it further includes: When the disk space of the virtual machine needs to be increased, the XenServer platform is used to apply for the required increased disk space from the virtual disk repository. 3. The method of claim 1, wherein, After the creation of the virtual machine is completed, it further includes: Create a snapshot of the virtual machine through the XenServer platform. 4. The method of claim 1, wherein, After the creation of the virtual machine is completed, it further includes: The virtual machine is migrated through the XenServer platform. 5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: adding a required UFS operation interface and a UFS protocol implementation interface in the XenServer platform; The XenServer platform completes required operations by calling the interface.

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