On Mon, Dec 21, 2009 at 10:38 AM, Minh Nguyen <nguyenmi...@gmail.com> wrote: > Hi Simon, > > On Tue, Dec 22, 2009 at 5:31 AM, Simon King <simon.k...@nuigalway.ie> wrote: >> Hi! >> >> I currently have a process running on sage.math that from time to time >> writes data to disk. I noticed that quite often the process does not >> appear in top, then shortly flashes up, and disappears again. My >> interpretation is that it is invisible to top when data are written. >> But this interruption takes an unusual amount of time. >> >> So, is there a problem with the disks or the NFS? >> >> There were also some problems when I connected with ssh: Sometimes >> after typing the password, nothing happened for several minutes, or >> the message of the day appeared, but no prompt came, or I typed >> "screen -r" but nothing happened for quite some time. >> >> Do other people experience the same? > > Yes. It has been happening since the last 24 hours. > > >> Are these things possibly >> related? > > When something like this happens, it is likely the problem is related > to NFS, especially disk I/O on an NFS mounted disk. To minimize > disruption, one should use the directory /scratch on sage.math. For > more guidelines on minimizing disruption on the Sage cluster, see the > guidelines [1] on the Sage wiki. > > [1] http://wiki.sagemath.org/SageClusterGuidelines
+1 Never use the NFS-mount /home directory for serious work, if you can avoid it. The network on *.math.washington.edu sucks still. -- William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
