Thanks for all the useful thoughts and pointers. I'll give them a try and see what I can manage to pull together. Sean ------------------------------------------------------------------------ Sean P. Kane spkane@genomatica.com Lead Infrastructure Architect Genomatica, Inc. ------------------------------------------------------------------------ "When we destroy something man has created we call it vandalism...... When we destroy something that Gaia has created we call it progress." -----Original Message----- From: Wolfgang Weisselberg [mailto:uzx87lvfmukwc001@sneakemail.com] Sent: Monday, June 23, 2003 17:35 To: linux-lvm@sistina.com Subject: Re: read-only media in a LVM? Sean P. Kane wrote 78 lines: > I'd love to have a unionfs, but my understanding is that no such beast > exists for Linux 2.4 currently Try looking at http://plasticfs.sourceforge.net/plasticfs.html Plasticfs-viewpath is basically a unionof all filesystems in the viewpath, changes happen on the first one and a .whiteout remembers what you deleted. It does *not* work for root (security!!! You do not want root to see /tmp/login instead of /bin/login!). Remember to set the environment variables, e.g. LD_PRELOAD=/usr/local/lib/libplasticfs.so PLASTICFS="viewpath /ramdisk /cdrom1 /cdrom2" /bin/bash # or whatever program you want. Since Plasticfs works on file-level, you should be able to mix and match filesystems as you like. Note however that --- since we just overload common FS access methods --- some things might not work. I have it in production use (for Aegis, not for cdroms). -Wolfgang _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
