ideas about a unioning file system
areilly at bigpond.net.au
Mon Jun 23 23:52:12 PDT 2003
On Tue, 2003-06-24 at 16:29, Terry Lambert wrote:
> Andrew Reilly wrote:
> > On Fri, 2003-06-20 at 08:15, Mohammad Nayyer Zubair wrote:
> > > Has anyone extensively used freebsd unionfs? From a system/network
> > > administrator or from a kernel developer standpoint, what do you like
> > > about it and what you dont like about it?
> > I'm using unionfs thusly:
> > # Device Mountpoint FStype Options Dump
> > /dev/vinum/vinum0 /usr ufs rw,union 0
> > 2
> Actually, this is the union mount option, which isn't the same
> thing as unionfs.
Aah. OK. I wondered a bit about that myself.
So: what's unionfs? Does the union option in fstab invoke mount_union,
or is union mounting something that mount manages for itself,
independent of the FStype?
Having looked at mount_union, I don't think that I like the
copy-to-top-layer on write semantics for objects that exist in the
bottom layer. I hope that's not happening to my system.
> It's a mount option, not a file system. 8-).
How could it be otherwise?
Andrew Reilly <areilly at bigpond.net.au>
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