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[sean mooney <2008762@xxxxxxxxxxxxxxxxxx>]

did you mean to file this to cinder.

or did you file this for disk quota in the flavor


https://github.com/openstack/nova/blob/master/nova/api/validation/extra_specs/quota.py#L149-L167

i assume for the first link 
https://docs.openstack.org/cinder/latest/admin/basic-volume-qos.html 
that this should be a cinder bug

** Changed in: nova
       Status: New => Incomplete

** Also affects: cinder
   Importance: Undecided
       Status: New

** Tags added: documentation

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https://bugs.launchpad.net/bugs/2008762

Title:
  size_iops_sec does behave different than mentioned in docs

Status in Cinder:
  New
Status in OpenStack Compute (nova):
  Incomplete

Bug description:
  In documentations mentioned that size_iops_sec is "burst bucket size"

  https://docs.openstack.org/cinder/latest/admin/basic-volume-qos.html

  but in libvirt documentations is: "The optional size_iops_sec element
  is the size of I/O operations per second"

  https://libvirt.org/formatdomain.html

  and in qemu documentations "iops-size" described as "This setting specifies the size (in bytes) of an I/O
  request for accounting purposes. Larger requests will be counted
  proportionally to this size."

  https://github.com/qemu/qemu/blob/master/docs/throttle.txt

  so I think it is not related to burst bucket size.

  and of course we do not have support for *_max_length parameters for
  burst duration in nova.

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