On Fri, May 10, 2002 at 07:44:44PM -0500, Steven Lembark wrote: > > > -- Austin Gonyou <austin@coremetrics.com> > > >>From what I understand you *can* mount the LVM volumes on multiple hosts > > >at the same time, but you should be *readonly* on the hosts which do not > >*own* the data on the disks. You could then *remount* the volume on the > >target failover host. > > I've had reasonable luck with this approach on other > platforms (HP-UX, but the LVM is similar enough that > it should work). well actually a lot of details about the filesystem are cached on an host, so you get relly funny results when you dont expect filesystem metadata to change under your nose. I would not be surprised to see a box panic under these circumstances. > All it really needs is a "heartbeatd": you open a > socket to, say, echo (port 1) and every second write > a byte. If you don't get the byte back in, say, 100ms > then you try one more time before re-mounting the LV > rw on the backup host. there is a tool called heartbeat on http://www.linux-ha.org/ have a look at it it really rocks. it already has a resource that supports mounting of partitions on shared media in case an hosts fail, it would be trivial to adapt it for LVM L. -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \ _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
