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[Bug 1216042] Re: InstanceTypeDiskTooSmall does not account for VHD chain overhead

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Thu, 05 Sep 2013 15:47:52 -0000
Reply-to: Bug 1216042 <1216042@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/1216042

Title:
  InstanceTypeDiskTooSmall does not account for VHD chain overhead

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  The InstanceTypeDiskTooSmall in _check_vdi_size of vm_utils.py for
  XenAPI will throw an exception when importing VHD chains over root_gb
  in physical utilization. A VHD chain can easily be the same size as
  the virtual allowed amount or larger. An overhead allowance or removal
  of the check should be done so that legitimate builds can go through
  where the VHD chain is just slightly larger than root_gb allows.

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