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What Are the Differences Between Image Formats on HUAWEI CLOUD Stack?

Created: Feb 26, 2022 08:53:29Latest reply: Feb 26, 2022 09:02:46 156 1 0 0 0
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Hello friends!


This post enquires about the differences between image formats on HUAWEI CLOUD Stack. Please check out more details below.


ISSUE DESCRIPTION


Which image formats does HUAWEI CLOUD Stack support? What are the differences between image formats on HUAWEI CLOUD Stack?


Thanks in advance!

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Featured Answers
olive.zhao
Admin Created Feb 26, 2022 09:02:46

Hello, friend!

Q1. Which image formats does HUAWEI CLOUD Stack support?

Currently only supports mirror registration in VMDK, VHD, QCOW2, ZVHD, and ZVHD2 formats.

For more details. see Which Image Formats Does HUAWEI CLOUD Stack Support Import and Export?

Q2. What are the differences between image formats of HUAWEI CLOUD Stack?

Image Format

Description

ZVHD

This is a self-developed format. It uses the zlib compression algorithm and supports sequential read and write.

ZVHD2

This is a self-developed format. It uses the Zstandard (or zstd) algorithm and supports lazy loading.

QCOW2

QCOW2 is a format of disk images supported by the QEMU simulator. A QCOW2 image file is used to represent a block device disk with a fixed size. Compared with a RAW image, a QCOW2 image has the following features:

  • Occupies less disk space.

  • Supports Copy-On-Write (COW). The image file only represents changes made to an underlying disk.

  • Supports snapshots.

  • Supports zlib compression and AES encryption. AES stands for Advanced Encryption Standard.

VMDK

VMDK is a virtual disk format created by VMware. A VMDK file represents a physical disk drive of the virtual machine file system (VMFS) on an ECS.

VHD

VHD is a virtual disk file format provided by Microsoft. The VHD file format can be compressed into a single file and stored in the file system of the host. It mainly contains a file system required for starting ECSs.

Hope this helps!

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All Answers
olive.zhao
olive.zhao Admin Created Feb 26, 2022 09:02:46

Hello, friend!

Q1. Which image formats does HUAWEI CLOUD Stack support?

Currently only supports mirror registration in VMDK, VHD, QCOW2, ZVHD, and ZVHD2 formats.

For more details. see Which Image Formats Does HUAWEI CLOUD Stack Support Import and Export?

Q2. What are the differences between image formats of HUAWEI CLOUD Stack?

Image Format

Description

ZVHD

This is a self-developed format. It uses the zlib compression algorithm and supports sequential read and write.

ZVHD2

This is a self-developed format. It uses the Zstandard (or zstd) algorithm and supports lazy loading.

QCOW2

QCOW2 is a format of disk images supported by the QEMU simulator. A QCOW2 image file is used to represent a block device disk with a fixed size. Compared with a RAW image, a QCOW2 image has the following features:

  • Occupies less disk space.

  • Supports Copy-On-Write (COW). The image file only represents changes made to an underlying disk.

  • Supports snapshots.

  • Supports zlib compression and AES encryption. AES stands for Advanced Encryption Standard.

VMDK

VMDK is a virtual disk format created by VMware. A VMDK file represents a physical disk drive of the virtual machine file system (VMFS) on an ECS.

VHD

VHD is a virtual disk file format provided by Microsoft. The VHD file format can be compressed into a single file and stored in the file system of the host. It mainly contains a file system required for starting ECSs.

Hope this helps!

View more
  • x
  • convention:

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