Glance updating a virtual disk size has the following benefits:
1. Cinder can check this value outright and fail fast for a volume creation if the volume size is less than the virtual size instead of having to download the image.
2. Nova can check this value and do the same against flavor quota without having to download the image.
Glance updating a virtual disk size has the following benefits:
1. Cinder can check this value outright and fail fast for a volume creation if the volume size is less than the virtual size instead of having to download the image.
2. Nova can check this value and do the same against flavor quota without having to download the image.