Re: fss(4) behaviour if backup fs full

To: Edgar Fuß <ef%math.uni-bonn.de@localhost>
Subject: Re: fss(4) behaviour if backup fs full
From: "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>
Date: Tue, 28 Apr 2015 13:47:58 +0200

On 24 Apr 2015, at 11:24, Edgar Fuß <ef%math.uni-bonn.de@localhost> wrote:

> How will an fss(4) snapshot behave if the file system used for the 
> copy-on-write backup store gets full?
> Will it drop the snapshot? Will all write operations to the original fs fail? 
> Will it panic?

The snapshot becomes invalid, no further copy-on-write and reading
gives ENXIO (Device not configured).

The snapshot device stays configured.

--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig (Germany)

References:
- fss(4) behaviour if backup fs full
  - From: Edgar Fuß

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