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[Bug 1210264] Re: compute manager makes a libvirt/xenapi call per instance update

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Thu, 05 Sep 2013 15:44:48 -0000
Reply-to: Bug 1210264 <1210264@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => havana-3

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https://bugs.launchpad.net/bugs/1210264

Title:
  compute manager makes a libvirt/xenapi call per instance update

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Compute manager's _instance_update() makes a call to
  driver.get_available_nodes() which ends up causing libvirt and/or
  xenapi calls for either of those virt drivers.  It's possible API
  calls are made in other virt drivers as well, but I didn't check.

  _instance_update() is called often, especially in the build process of
  a new instance.  If there's any slowness with XenAPI/libvirt calls,
  this slows down the build process considerably.

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