I've posted that on StackOverflow and I've been advised to move it here. Sorry for that.
First of all, this is the first time I'm posting a question on ServerFault, so please don't kill me if I've done anything wrong.
There goes my issue:
We have few dedicated servers with a well known French provider. With one of those servers ewe have recently acquired a 5.000GB backup space which can be mounted via NFS, and that's what we've done.
The issue comes when backing up big files. Every night we back up several VM's running on that host and we know from fact that the backups are not being properly done (the file size differs a lot from one day to the other plus we've checked the content of the backup and there's stuff missing).
So, it seems like the mount point is not stable and the backups are not being properly done. Seems like there are micro network cuts and therefore the hypervisor finishes the current backup and starts with the next one.
This is how it's mounted right now:
xxx.xxx.xxx:/export/ftpbackup/xxx.ip-11-22-33.eu/ /NFS nfs auto,timeo=5,retrans=5,actimeo=10,retry=5,bg,soft,intr,nolock,rw,_netdev,mountproto=tcp 0 0
Any advise? Is there any parameter you would change?
We need to be sure that the NFS mount point is correctly working in order to have proper backups.
Thank you so much.