On Tue, 16 Dec 2008 09:57:12 -0500
Bob Doolittle <[email protected]> wrote:

> Meik Hellmund wrote:
>> How network-transparent is the timeslider? Does it work with
>> NFS-mounted homes (the NFS server using ZFS)? 
>> Is a configuration with 100 users making individual snapshots of
>> their homes really feasible?
>   
> I'm afraid I'm not in a good position to discuss the feature in
> detail. You might send your questions to
> [email protected].
> 
> Remember that with ZFS snapshots are (essentially) free.  It's only
> when the content changes that any disk data changes occur.  So it
> seems like this should scale pretty well, but that's just my novice
> observation and not based on experience.  It will eat up storage over
> time, I'm sure, if you are aggressive about snapshots and not
> aggressive about reaping them.
> 

According to the last entry in 
<http://brainstorm.ubuntu.com/idea/14400/>,
the timeslider nautilus extension is NFS-transparent. 
The NFS client simply sees the snapshots as
$HOME/.zfs/Year-Month-Day-Hour:Minute/ 

That's great news. In one of my Sunray installations I have 
a Solaris machine (currently Nevada b95) providing CDE and 
with all the home directories on ZFS and  two Linux machines providing
Gnome and KDE for ~100 users. 
So it should be possible for me to provide this feature for the
Gnome users of Solaris *and* Linux. On the Linux side I only have to
build my own nautilus with the patch
<http://src.opensolaris.org/source/xref/jds/spec-files/branches/gnome-2-24/patches/nautilus-13-zfs-snapshot.diff>
Sounds like an interesting project.

--Meik

-- 
Meik Hellmund
Mathematisches Institut, Uni Leipzig
e-mail: [email protected]
http://www.math.uni-leipzig.de/~hellmund
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