XO Delta Backup Fails to Local Storage Mounted via NFS

stevewest15

Hi,

I'm testing the Delta Backup where I set it up to store the backups to the Local Storage as mounted by XCP-ng via NFS:

# df -h /run/sr-mount/18a42ec4-9e1b-f711-5d2d-6c8b58d7e26e/
Filesystem                                                    Size  Used Avail Use% Mounted on
10.10.2.3:/mnt/Tank/VMs/18a42ec4-9e1b-f711-5d2d-6c8b58d7e26e  6.0T  743G  5.3T  13% /run/sr-mount/18a42ec4-9e1b-f711-5d2d-6c8b58d7e26e

The error I'm getting when the backup runs is "Error: ENOSPC: no space left on device, write" but the backups from this server should only be about 800GB while the NFS mount has 5.3T free.

Any suggestions on what could be the issue? For the remote settings, I have the following which is set to Local and the NFS mounted SR:

I wasn't sure what to set for the schedule when doing delta backups but I have it to the following which I'm hoping will do 1 full backup and 6 nightly deltas and then rotate:

Thank you,

SW

Danp

Can you explain why you chose to go with "NFS mounted as local storage" instead of just setting up a standard NFS remote?

stevewest15

Hi @Danp,

I used the NFS mounted as local storage as I thought I don't need to make another NFS connection to the FreeNAS when it's already mounted. Is that not recommended?

Thx,

SW

stevewest15

Hi,

So I tried using the NFS target remotes but the speed of transfer was very poor even though the connection from XO to the NFS server is over 10Gbe. XO is on the same XCP-ng host as the VMs being backed up. This XCP-ng server is connected to the NFS mount over 10Gbe network:

Here is the NFS Remotes setting in XO to the backup server (FreeNAS) at IP 10.10.2.3:

The backup logs show extremely low transfer speed: