Glance Image-download [2021] Qcow2 -

Smaller download sizes make it ideal for migrating images between different cloud environments. Important Troubleshooting Tips

QCOW2 (QEMU Copy-On-Write version 2) is highly popular in OpenStack environments using KVM or QEMU because of several native features:

glance image-download --file my_backup.qcow2 --progress [IMAGE_ID] Use code with caution.

If you are downloading a snapshot or an image for migration, it is best practice to verify the format once it arrives on your local disk.

The file size only grows as data is written, saving disk space.

If the downloaded image is in RAW format but you need QCOW2 , use qemu-img convert to change the format locally.

By default, the command outputs the raw data stream to your terminal (STDOUT), which is rarely useful. You must use the --file flag to save the image as a local file.

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Smaller download sizes make it ideal for migrating images between different cloud environments. Important Troubleshooting Tips

QCOW2 (QEMU Copy-On-Write version 2) is highly popular in OpenStack environments using KVM or QEMU because of several native features: glance image-download qcow2

glance image-download --file my_backup.qcow2 --progress [IMAGE_ID] Use code with caution. Smaller download sizes make it ideal for migrating

If you are downloading a snapshot or an image for migration, it is best practice to verify the format once it arrives on your local disk. The file size only grows as data is

The file size only grows as data is written, saving disk space.

If the downloaded image is in RAW format but you need QCOW2 , use qemu-img convert to change the format locally.

By default, the command outputs the raw data stream to your terminal (STDOUT), which is rarely useful. You must use the --file flag to save the image as a local file.