On Wed, Jan 26, 2011 at 01:37:38PM +0100, Matthias Fechner wrote: > Dear list, > > I want to build up a NFS share for several host. > The base system is always equal, only some files are different > (files in /etc and /var, maybe more). > > The structure should look like: > Base system is on /basesystem > > Then I want a directory for every host: > /nfsroot/host1 > /nfsroot/host2 > .. > /nfsroot/hostn > > Client 1 will boot via lan and mount the /nfsroot/host1 via NFS. > On the server the mount could look like: > mount -t nullfs /basesystem /nfsroot/host1 > mount -t nullfs /basesystem /nfsroot/host2 > > If the host1 changes now a file the changed file is not stored in > /basesystem but in /nfsroot/host1. > (so you can think about a filesystem in two layers, the ground layer > is /basesystem and readonly, changes will go to /nfsroot/hostn) > > If i upgrade the /basesystem all files should be available for all > hosts expect the files the host changed by itself (they are stored > in the nfsroot/hostn directory). > > In FreeBSD there is a file system available called nullfs which > could be used for this. > Is there a similar filesystem for Linux available, too?
Unionfs or aufs should be able to do that. yoyo
