@Dashrender It's not! The SR is just here to store a snapshot to make the delta.
But the files are NOT STORED inside any XenServer, but on an external storage (XOA itself or a NFS share). And you can restore the backup even if you lost your whole XenServer infrastructure.
@DustinB3403 Local Storage in LVM. Not file based.
You are welcome. Now it's more calm here, just take a preview (draft article, not published yet) about what's coming very soon: https://xen-orchestra.com/blog/p/82d8aaf1-84be-4a81-ab3a-10891bf7d1bb/
@johnhooks Sadly yes. That's the usual problem with thick pro storage. That's why NFS is always a good idea for shared SR.
I have to make some test to check how Dundee behave now with Local LVM and LVMoiSCSI.
@johnhooks Depends of your XenServer SR type, not related to XO.
@DustinB3403 No inside the SR (the XenServer SR)
edit: the SR where reside your VM disks
@DustinB3403 Hmm. You should have a VDI snapshot somewhere in your SR view (that's not visible inside the VM view, only on the SR one)
@johnhooks It stays until the next backup: then it's removed and replaced just after by a new delta snapshot. That's because a delta is always created by making a difference between 2 references (the current VM disk and a snapshot).
@johnhooks The only thing needed is a VDI named "XO_DELTA" something like that (visible in the SR view, in the VDI list).
And it's only needed to create delta. You don't need anything to import a backup, you can doing on a freshly installed XenServer (that's the point of a backup: to be useful in case you lost everything)
BTW, I made very interesting tests with ZFS on Linux + XOA delta backups.
Using LZ4 compression is very impressive. Maybe one day integrate the LZ4 compression on the fly into xo-server.
And very soon, you'll have the "continuous VM replication" allowing you to protect XOA itself too, with a minimal downtime.
@DustinB3403 You can backup it if you want ^^ Exporting the backup on a NFS remote share, then if it crashes, re-import a new XOA, connect to the NFS share and reimport it. Tadaaa 
No problem to export a running VM, so no problem to export "itself".
Oh and final thing about this AMA-ish stuff: the goal wasn't to complain about EU investors and giving them all the blame, but just to give a picture of the situation, explaining things. Have a nice day lads 
@DustinB3403 That's fixed and be out for the 4.12, Friday (or at worst Monday).
If you like to be cutting edge, switch to "next-release" branch on both xo-web and xo-server. It's already in there.
@DustinB3403 said:
So @olivier you never answered my question, when does the "Importing" feature get released?
Sorry didn't see the question. What do you mean by importing feature?
@DustinB3403 That's roughly the idea yes. Thanks, will do!
@DustinB3403 the first round was something like that (at our local scale). We are not in a bad/urgent situation either. We "just" got a "limited bandwidth".
@scottalanmiller I wasn't born in the right country so ^^
@anonymous sorry for the AMA...
