[PVE-User] Ceph and cold bootstrap...

Adam Thompson athompso at athompso.net
Sat Sep 17 00:22:31 CEST 2016

Soft-mounting NFS introduces the *possibility* of accidental (and silent) data loss in corner cases, however.  There's a lot of strident "soft-mounting is dangerous!" rhetoric on the net, it is a reasonable option in many cases as long as you understand the corner cases where data loss can occur silently and either mitigate them or deliberately accept the risk in exchange for the benefits of soft-mounting.

Personally, I use "soft,intr" in almost all cases, but that's because I'm willing to accept the possibility of silent data loss if my NFS server goes down moments before my PVE servers.  (Note that silent data loss in a QCOW2 file could also mean the QCOW2 file becomes corrupt and unusable... the same applies to VMDK, but should theoretically not be a problem with RAW.) 


> -----Original Message-----
> From: pve-user [mailto:pve-user-bounces at pve.proxmox.com] On
> Behalf Of Lindsay Mathieson
> Sent: September 16, 2016 17:08
> To: PVE User List <pve-user at pve.proxmox.com>
> Subject: Re: [PVE-User] Ceph and cold bootstrap...
> On 17/09/2016 12:54 AM, Brian :: wrote:
> > When NFS hangs you practically need to get hostage negotiators in to
> > talk to a machine into rebooting (or use -f:)
> If you soft mount NFS its a lot better.
> --
> Lindsay Mathieson
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> pve-user at pve.proxmox.com
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