Messages in this thread | | | Subject | Re: High-availability question | From | Modemch <> | Date | 26 Jul 1999 12:10:32 -0400 |
| |
Pavel Machek <pavel@bug.ucw.cz> writes:
> > Hope this is not too much off-topic. I have a client who wants to setup a > > high-availability linux server network. It's an ISP, so we're talking > > mail/web/ftp/dns/etc. I would like to have 2 identical boxes, with > > identical harddisks partitioned the same way, and to have the main box > > constantly synchronize it's filesystem with the standby box, so that when > > it fails, the standby just does an IP takeover, and has all the recent data > > in place. I would really like to do this on the lowest possible level, > > something like 'write this block to head x, cylinder y', instead of doing > > cp over nfs every 5 minutes or so. Is there anything available that would > > do something like that? If not, how easy would adding this to the kernel > > be? Can it be done it all? My idea was to have the standby box run a > > custom init binary, that would just sync the disks and wait for the other > > box to die. When it dies, it runs the real init, everything comes up, and > > the box takes over. > > raid1 over localdisk and nbd-mounted disk from other host is the > answer.
I really like this idea. One question though - will this still work if both machines run hardware raid?
-- Regards, Modemch
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |