Date: Fri, 06 May 2005 13:20:19 +0200 From: Eirik =?ISO-8859-1?B?2A==?=verby <ltning@anduin.net> To: Danny Braniss <danny@cs.huji.ac.il> Cc: stable@freebsd.org Subject: Re: Current status of nullfs and/or unionfs? Message-ID: <BEA11F93.14A55%ltning@anduin.net> In-Reply-To: <E1DU0n4-0004uf-0J@cs1.cs.huji.ac.il>
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On 06-05-05 13:14, "Danny Braniss" <danny@cs.huji.ac.il> wrote: >> On 06-05-05 09:25, "Danny Braniss" <danny@cs.huji.ac.il> wrote: >> >>> >>>> Interesting approach. Is this with 4.x or 5.x? How do you union-mount /etc >>>> (mount command/fstab entry)? >>>> >>> >>> been doing it since 4.x (i think x < 9) >> >> Any idea how unionfs will behave if stacked (more mounts on top of each >> other)? I was playing with the thought of having a "template" jail directory >> which I unionmount into my jails, then perhaps use your trick to union-mount >> a md device into certain points in the jail. Got a gut feeling about that? > > i have the feeling that that will get into trouble :-), but im no expert > here. If what you mean is: > > mount_unionfs /md-0 /jail-0 > and then > mount_unionfs /md-1 /jail-0/xyz > > which is not strickly 'stacked', might work and should be easy to try out, but > IMHO, breaks the KISS principle :-) I was more thinking, like, mount_unionfs -b /jails/jail_template /jails/jail-0 mount_unionfs /md-0 /jails/jail-0/etc for example. I could also imagine stacking unionfs on top of nullfs, like mount_nullfs /cdrom/jail_template /jails/jail-0 mount_unionfs /md-0 /jails/jail-0 alternatively mount_unionfs /nfs-0 /jails/jail-0 Sounds weird, I know, but we could use it... > and also, im not sure if: > mkdir /jail-0/xyz > mount_unionfs /md-1 /jail-0/xyz > is the same as the above. > > danny > > >
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