Nova counts 'local disk usage' for volume-backed instances - Red Hat Customer Portal

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Issue

When using cinder backend storage for instances, why does nova scheduler/conductor still count this against the local_gb used for each hypervisor?
Is it due to the min free of a glance image, or the nova flavor used?
What are the recommendations when using cinder backed volumes vs. epehemeral storage?
Why do cinder volume backed instances count against the local_gb hypervisor disk?

Environment

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