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[Bug 1988011] [NEW] The allocation ratio of ram change by placement does not work

 

Public bug reported:

I found that Nova will check ram_ratio in the table of compute_nodes in
order to check whether the destination node has enough memory, when
executing live migration instance to a target host.

In same cases, the ram ratio in Nova is different from Placement, when I
change the allocation_ratio by Placement API. And live migration is
still failed when I increasing the ram ratio by Placement if it is
deficient.

I think the ratio in Nova should keep up with the value in Placement.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1988011

Title:
  The allocation ratio of ram change by placement does not work

Status in OpenStack Compute (nova):
  New

Bug description:
  I found that Nova will check ram_ratio in the table of compute_nodes
  in order to check whether the destination node has enough memory, when
  executing live migration instance to a target host.

  In same cases, the ram ratio in Nova is different from Placement, when
  I change the allocation_ratio by Placement API. And live migration is
  still failed when I increasing the ram ratio by Placement if it is
  deficient.

  I think the ratio in Nova should keep up with the value in Placement.

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