This page has information on how to increase the limit of open files. Pass 1 and 3 don't require reboot.
http://www.cs.uwaterloo.ca/~brecht/servers/openfiles.html 2007/10/31, George Bosilca <bosi...@eecs.utk.edu>: > > For some version of Open MPI (recent versions) you can use the > btl_tcp_disable_family MCA parameter to disable the IPv6 at runtime. > Unfortunately, there is no similar option allowing you to disable IPv6 > for the runtime environment. > > george. > > On Oct 31, 2007, at 6:55 PM, Tim Prins wrote: > > > Hi Clement, > > > > I seem to recall (though this may have changed) that if a system > > supports > > ipv6, we may open both ipv4 and ipv6 sockets. This can be worked > > around by > > configuring Open MPI with --disable-ipv6 > > > > Other then that, I don't know of anything else to do except raise > > the limit > > for the number of open files. > > > > I know it doesn't help you now, but we are actively working on this > > problem > > for Open MPI 1.3. This version will introduce a tree routing scheme > > which > > will dramatically reduce the number of open sockets that the runtime > > system > > needs. > > > > Hope this helps, > > > > Tim > > > > On Tuesday 30 October 2007 07:15:42 pm Clement Kam Man Chu wrote: > >> Hi, > >> > >> I got a "Too many open files" error while running over 1024 > >> processes > >> on 512 cpus. I found the same error on > >> http://www.open-mpi.org/community/lists/users/2006/11/2216.php, but I > >> would like to know whether it is another solution instead of changing > >> limit descriptors. The limit descriptors is changed by root access > >> and > >> needs to restart the system that I don't want to. > >> > >> Regards, > >> Clement > > > > > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > >
