+++ This bug was initially created as a clone of Bug #1053746 +++
+++ This bug was initially created as a clone of Bug #1053733 +++
+++ This bug was initially created as a clone of Bug #960934 +++
The storage requirements for each disk in the exported VM:
(note that an export domain can only be a file domain)
qcow | preallocated : 1.1 * disk capacity
| sparse: 1.1 * min(used ,capacity)
-----|-----------------------------------------
raw | preallocated: disk capacity
| sparse: min(used,capacity)
Exporting disks with snapshots can be done either with the snapshots as is, or with the snapshots collapsed. For the latter the table from comment#0 applies.
For the first case (non-collapsed) the following table applies:
qcow | 1.1 * used space
-----|-----------------------------
raw | preallocated: disk capacity
| sparse: used space
When verifying this bug both cases should be verified, positive and negative tests: Verify against a storage domain with and without enough space - just about the needed/excess space for the disks. Verify it succeeds when there's enough space and fails on CDA when it doesn't.
Threshold should also be verified on this bug.
If a VM has memory volumes, their space should also be taken into consideration (for every snapshot).
The metadata volume's size is negligible (10KB) and is always Cow, Sparse.
The memory volume's size varies, is always RAW, and is Sparse for file domains and Preallocated for block domains.