[PVE-User] NFS Storage issue

Gianni Milo gianni.milo22 at gmail.com
Thu Apr 25 14:34:30 CEST 2019


Hello

I have a Synology with High Availability serving NFS storage to Proxmox.
> A couple of months ago, this started happening:
>
> Apr 24 12:32:51 proxmox-1 pvestatd[3298]: unable to activate storage
> 'NAS' - directory '/mnt/pve/NAS' does not exist or is unreachable
> Apr 24 13:08:00 proxmox-1 pvestatd[3298]: unable to activate storage
> 'NAS' - directory '/mnt/pve/NAS' does not exist or is unreachable
>
>
It appears that the NFS storage target was unreachable during that time...


> It affecting backups and VM speeds. Any idea what is causing this?


I would guess that the network link used for accessing the NFS target is
getting saturated. This sometimes can be caused by running backup jobs,
and/or other tasks like VMs demanding high i/o to that destination.

There are no errors in the Synology logs, and the storage stays mounted and
> accessible.
>

You mean that it stays accessible after the backups are finished (or
failed) and after the i/o operations return to the normal levels ?
Do you recall if there was any of the above happening during that time ?


> Any ideas what's going on?
>

I would set bandwidth limits either on the storage target or on the backup
jobs. See documentation for details on how to achieve this.
Even better, separate VMs from the backups if that's possible (i.e use
different storage/network links).

G.


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