++ 14/12/05 20:19 +0100 - <Stephan Wiesand>: Hey Stephen, > Hi, > > On Wed, 14 Dec 2005, John A. Goebel wrote: > > >++ 14/12/05 18:23 +0000 - <John Rowe>: > > > >Hi, > > > >>>What do you want to do with this filesystem? > >> > >>Aways a good question. I have a bunch of nonidentical PCs running SL4.x > >>connected by gigabit. People can log into any of them and see their home > >>space. Currently I do this by having two of them as file servers, each > >>with a mirrored disk pair. Ideally I would like to have a single virtual > >>"/home" filesystem which I could add physical disks to and which is > >>resilient to any one node being down. > > > >I don't know what your load is like, but can't NFS do this for you and LVM? > > > >For the requirement of serving $HOME, NFS is a classic. Although I haven't > >tried it, NFS 4 has failover. Maybe someone else has a better suggestion? > > Even if that's implemented now (is it?), wouldn't you still need some > (cluster) filesystem shared between the servers? Yes, that's right. Years ago, when I had to do this, I used Kimberlite. Sorry, I don't know the current resources. I like the simple solution if it works, so here a recipe: http://www.linux-ha.org/HaNFS > AFS won't do the job either (no read-write replication). It would be > possible to recover from a failed node quickly and transparent to the > client, though. > > The most promising solution in such a scenario to me seems to be something > like that described in > > http://www.rhic.bnl.gov/hepix/talks/041020am/miers.pdf > > Not trivial to set up, and I wonder how lock recovery would work, but the > best low cost solution I know of. Also, you might want to poke around Linux HA site. The LAN mirror section especially: http://www.linux-ha.org/RelatedTechnologies_2fLanMirroring John > Stephan > > >For the requirement of disk management, LVM should do the trick. There are > >a > >bunch of papers online about using LVM/Raid. You can load and configure > >using > >kickstart. I have a ks.cfg that I can send to you if you interested, but > >basically I used a version from the net and modified it for my use. > > > >Sounds like you don't need too fancy a configuration. > > > >>Needless to say, there's no budget for any fancy hardware. > > > >I know that feeling. > > > >John > > > >>John > > > >############################################## > ># John Goebel <jgoebel(at)slac.stanford.edu> # > ># Stanford Linear Accelerator Center # > ># 2575 Sand Hill Road, Menlo Park, CA 94025 # > >############################################ # > > > > -- > > ---------------------------------------------------- > | Stephan Wiesand | | > | | | > | DESY - DV - | phone +49 33762 7 7370 | > | Platanenallee 6 | fax +49 33762 7 7216 | > | 15738 Zeuthen | | > | Germany | | > ---------------------------------------------------- ############################################## # John Goebel <jgoebel(at)slac.stanford.edu> # # Stanford Linear Accelerator Center # # 2575 Sand Hill Road, Menlo Park, CA 94025 # ############################################ #