Question about XO snapshot location
-
Dear Community, I have a question about the snapshot location when running snapshot backup via XO.
my setup is, I have local storage ( bunch of SSD on raid ), and also FreeNAS ISCSI block volume as the default storage on XO.What I notice is, if the VM has the virtual disk which stored on the local storage, the snapshot default storage location is also the local storage. If the VM has the virtual disk which stored on the FreeNAS, the snapshot is also stored on the FreeNAS.
I am wondering if this is a default behaviour? I tried setup the backup job which specify the snapshot location for all VMs is the FreeNAS, but somehow still have some VM's snapshot stored in the local storage.
Can I please ask if there is a setting which I am missing, or this is just how XO works? Thank you.
Andy
-
A snapshot is always related to its parent on the same storage. This is because how it works (at least for now)
I don't know which setting you are talking about regarding "specifying the snapshot location", which doesn't make sense to me?
-
Hi @olivierlambert , Thank you, and I think you answered my queries. You are right, because I have continuous replication as well as snapshot enabled in the same backup job, which gives me an option that I can pick the storage location. I think that might be because of the continuouse replication, which leads me the confusion here.
All good now. Thank you. I guess I will just change the retention policy, or increase the disk space. all good.
-
Yes indeed, in CR, you'll send a copy of the disk toward a destination SR. But still, the snapshot is made on the same storage.
However, I get your point, and I think in theory, it could be doable with some heavy changes in the storage stack (to have a snapshot located "elsewhere"). However, for each read in the VHD chain, you'll have to read on multiple storage at once, which can be complicated technically speaking (especially if they are shared)
