[PVE-User] NFS Storage issue

Mark Schouten mark at tuxis.nl
Thu Apr 25 14:54:21 CEST 2019

Might also be the number of nfsd started on your Synology.


Mark Schouten <mark at tuxis.nl>

Tuxis, Ede, https://www.tuxis.nl

T: +31 318 200208 

----- Originele bericht -----

Van: Gerald Brandt (gbr at majentis.com)
Datum: 25-04-2019 14:51
Naar: pve-user at pve.proxmox.com
Onderwerp: Re: [PVE-User] NFS Storage issue

On 2019-04-25 7:34 a.m., Gianni Milo wrote:
> 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.
> _______________________________________________

Thanks for the reply. Although it does happen during backups, causing
serious issues that require Proxmox server restart, it also happens
during the day. I don't see any saturation issues during the day, but
I'll start monitoring that.

So you're saying to set network bandwidth limits on the storage network
(I do keep a separate network for storage). I guess upgrading the
synology's with something that has 10GE would help as well.



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