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[Bug 1227653] Re: xenapi: snapshot_attached_here should wait for vhd coalesce after deleting the snapshot

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Sean Dague <sean@xxxxxxxxx>
Date: Mon, 30 Mar 2015 13:00:58 -0000
Reply-to: Bug 1227653 <1227653@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Marking as Opinion as it is a bug by a core contributor without much
context.

** Changed in: nova
       Status: Triaged => Opinion

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https://bugs.launchpad.net/bugs/1227653

Title:
  xenapi: snapshot_attached_here should wait for vhd coalesce after
  deleting the snapshot

Status in OpenStack Compute (Nova):
  Opinion

Bug description:
  When we take a snapshot, upload it, then delete the snapshot, we
  should really wait to make sure the VHD chain gets restored to its
  original state.

  If the VHD chain did not collapse:
  * snapshots contain more and more VHDs over time
  * longer chains mean longer possible max size of the chain

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