A method, storage device and system for linked cloning based on SR-iov

Abstract

The invention discloses an SR-IOV (Single Root I / O Virtualization)-based linked clone method, which comprises the following steps: a virtual machine monitor creates a base mirror image in storage equipment through a physical function driving module; a storage controller records the logical space range of the base mirror image, and generates a corresponding mirror image ID (Identifier) for the base mirror image; the virtual machine monitor sends a request command for creating a linked clone mirror image for a virtual machine (VM0); the storage controller distributes virtual function resources for the virtual machine (VM0), creates a difference mirror image of the colon mirror image, and maintains a corresponding mapping relationship; the memory controller receives the command which is sent to a destination virtual function by the virtual machine (VM0), looks up the corresponding difference mirror image and executes a corresponding operation to the difference mirror image. The invention also discloses an SR-IOV-based linked clone system, which comprises the storage equipment and a host, can realize linked clone hardware unloading, improves the I / O speed of the virtual machine and the reuse efficiency of a storage space, and is applied to the technical field of I / O virtualization.

Description

technical field [0001] The invention relates to I / O virtualization technology, in particular to an SR-IOV-based linked clone method, storage device and system. Background technique [0002] In this field, SR-IOV:Single Root I / O Virtualization is called single root IO virtualization. [0003] RAID: Redundant Array of Independent Disks, that is, redundant array of independent disks, or disk array for short. The original purpose of RAID is to combine multiple hard disks with small capacity into a large-capacity "logical disk" to realize the capacity of the hard disk. Added performance boost. With the development of RAID technology, different RAID array types can now be selected to meet the needs of hard disk capacity, data redundancy, or storage system performance. [0004] Using cloning technology in virtualization, administrators can easily clone one or more cloned virtual machines based on a source virtual machine (template), and the cloned virtual machine has the same ope...

AI Technical Summary

Problems solved by technology

[0007] Although this technology improves the I / O performance of storage devices and the utilization rate of storage resources in storage devices by supporting single-root input / output virtualization technology, it does not take into account the space multiplexing problem in desktop virtualization. Intervals are isolated from each other

[0008] In summary, although the SR-IOV technology can provide virtual machines with resource sharing of PCIE storage devices, in the desktop virtualization scenario, the data content of the operating system disk of each VM is basically the same, and there is a large amount of data redundancy.

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