As an another similar question about installation, I think that installation of Open MPI should be done on the master and all slave nodes. A program which use MPI feature also seems to have to be installed on the master and all slave nodes unless I use NFS. My question is that: if I used OpenPBS software rather than rsh/ssh, is this installation problem of Open MPI and/or a MPI featured program solved? Or, even though I used OpenPBS, need I have each copy of my MPI-featured program installed on the master and all the slave nodes? My question can be about the difference between using rsh/ssh and using OpenPBS.
Thank you, Sang Chul On 4/16/06, Sang Chul Choi <gos...@gmail.com> wrote: > > Thank you, Brian: > > It worked. > > Thank you, again. > > > On 4/16/06, Brian Barrett <brbar...@open-mpi.org > wrote: > > > > On Apr 16, 2006, at 8:18 AM, Sang Chul Choi wrote: > > > > > 1. I could not find any document except FAQ and mailing list > > > for Open MPI. Is there any user manual or something like that? > > > Or, the LAM MPI's manual can be used instead? > > > > Unfortunately, at this time, the only documentation available for > > Open MPI is the FAQ and the mailing list. There are some fairly > > significant differences between Open MPI and LAM/MPI, so while the > > LAM/MPI manuals could be a start, there are some fairly significant > > differences. > > > > > 2. Another question is about installation. > > > If I want to use rsh/ssh for Open MPI, do I have to install > > > Open MPI on all master and slave nodes? Or, should I use > > > something like NSF file system so that even though I installed > > > Open MPI on only master node, all the other salve nodes could > > > see Open MPI installation in the master node? > > > > Like LAM/MPI, Open MPI doesn't really care on this point. This is > > also somewhat of a religious point -- people seem to have strong > > opinions either way. The advantage of the NFS approach is that it > > makes it trivial to keep the software installs in sync on all the > > nodes. The advantage of the installation on local disk approach is > > that there is significantly less strain on the NFS server during > > process startup. For development, I tend to go with the NFS > > approach, since I'm constantly updating my installation. For large > > cluster production installs, I prefer the installation on each node > > approach. But unless your cluster is really large (or your NFS > > server is really slow) either approach should work. > > > > > The error I have is from I wanted to run a program on two slave > > > nodes but shell complained that there is no orted. It is true > > > that there is no installation of Open MPI on each slave node. > > > > Yes, that is the expected error if you try to run on a node without > > an Open MPI installation. If you ensure that a copy of Open MPI is > > installed (and in your path) on each node, your problem should go away. > > > > > > Hope this helps, > > > > Brian > > > > -- > > Brian Barrett > > Open MPI developer > > http://www.open-mpi.org/ > > > > > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > > > -- > =============================== > Live, Learn, and Love! > E-mail : goshng at empal dot com > goshng at gmail dot com > Home : +1-919-468-2578 > Address : 1528 Macalpine Circle > Morrisville, NC 27560 > =============================== > -- =============================== Live, Learn, and Love! E-mail : goshng at empal dot com goshng at gmail dot com Home : +1-919-468-2578 Address : 1528 Macalpine Circle Morrisville, NC 27560 ===============================
