"ephemeral_gb" in flavor and nova boot option "--ephemeral"

asked 2014-03-10 03:21:24 -0500

Rui gravatar image

updated 2014-03-10 03:24:25 -0500

I have some questions related "ephemeral_gb" in flavor and nova boot option "--ephemeral", and I faied to find out descriptions in existing documents:

  1. If I boot a new instance using flavor with "ephemeral_gb" defined as 20 G, and no "--ephemeral" specified, does the new instance have a 20G additional ephemeral disk after booted?
  2. The flavor has 20 G ephemeral disk defined, but specified two 5 G ephemeral disk through "--ephemeral" option in nova boot cmd, what will happen to the new instance? Get one 20G additional ephemeral? Or two 5 G ephemeral disks instead?
  3. If the answer to question 2 is "two 5 G ephemeral disks", what will happen if resize this instance to a flavor with "ephemeral_gb" defined as 40 G?
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