On Thu, Mar 22, 2012 at 10:53 AM, Simon King <simon.k...@uni-jena.de> wrote: > Hi William! > > On 2012-03-22, William Stein <wst...@gmail.com> wrote: >> I have no idea. The directory /home/lmfdb doesn't even have a data >> subdirectory. > > WHAT? You mean, data that I created in months of CPU time, among them > the first computation of the mod-2 cohomology ring of the third Conway > group, are now simply lost?
Possibly. I'm curious -- did you attempt to make any backups anywhere ever? >> When did you last check the above URL? > > Access to the data base at > http://sage.math.washington.edu/home/lmfdb/data/p_group_cohomology/data/ > is part of the test suite of the optional p_group_cohomology spkg. Eight > months ago, John Palmieri tested the preliminary version of what is now > version 2.1.2 at #9894. He found a couple of errors (that I fixed in > version 2.1.2), but access to the data base has not been a problem at > that time. > The $40K high end server on which /home/lmfdb was located completely died about that long ago. Sun/Oracle came out and replaced everything in the machine except the disks and got it to run again. I had a backup of /home, so was able to restore that. There was no backup of /home/lmfdb yet though, because it was too large at the time. (I attempted an offsite to waterloo, but the network was way too slow and the computers too flakie.) I also lost a big database as a result of this. And just to warn you: /scratch is not backed up right now either. What *is* backed up is /home/ -- there are 3 rotating external disks, with at least 1 at my house at any time, that backs up /home, and I'm also sending a backup to crashplan right now. > Best regards, > Simon > > > -- > 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 -- William Stein Professor of Mathematics University of Washington http://wstein.org -- 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
