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[OpenStack Infra <1771810@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/569055
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=77881659251bdff52163ba1572e13a105eadaf7f
Submitter: Zuul
Branch:    master

commit 77881659251bdff52163ba1572e13a105eadaf7f
Author: Surya Seetharaman <suryaseetharaman.9@xxxxxxxxx>
Date:   Thu May 17 10:16:56 2018 +0200

    Make _instances_cores_ram_count() be smart about cells
    
    This makes the _instances_cores_ram_count() method only query for instances
    in cells that the tenant actually has instances landed in. We do this by
    getting a list of cell mappings that have instance mappings owned by the
    project and limiting the scatter/gather operation to just those cells.
    
    Change-Id: I0e2a9b2460145d3aee92f7fddc4f4da16af63ff8
    Closes-Bug: #1771810


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1771810

Title:
  Quota calculation connects to all available cells

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) rocky series:
  Confirmed

Bug description:
  Quota utilisation calculation connects to all cells DBs to get all consumed resources for a project.
  When having several cells this can be inefficient and can fail if one of the cell DBs is not available.

  To calculate the quota utilization of a project should be enough to
  use only the cells where the project has/had instances. This
  information is available in nova_api DB.

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