Discussion related to cado-nfs

[paul zimmermann <Paul.Zimmermann@inria.fr>]

       Dear Sam,

the Perl script is severely outdated since it is from 2011 or before.
We strongly recommend to use a newer version of CADO-NFS (2.1.1 is from
last October). Importing a polynomial and relations is described in the
scripts/cadofactor/README file.

Best regards,
Paul

> Date: Sun, 8 Mar 2015 13:03:54 -0400 (EDT)
> From: Samuel S Wagstaff <ssw@cerias.purdue.edu>
> Cc: ssw@cerias.purdue.edu
> 
> 
> I am running CADO-NFS-2.0 on 2,2514L.  The sieving is done.
> The linear algebra will take several months.  I can run
> jobs for no longer than 720 hours, so it will have to be
> restarted several times.  The matrix is 128851467 by
> 128851307 and krylov will run to N=1257000.
> 
> I noticed that one time last year when bwc stopped because
> the computer was shut down, and I restarted bwc, it did not
> resume work from the point where it stopped, but rather
> deleted all the bwc files and started from the beginning.
> I use the Perl script to run bwc (and everything else
> after the sieve).
> 
> Here is the command that runs the Perl script:
> /home/wagstaff/cado2/cad/cadofactor.pl 
> params=/scratch/lustreC/w/wagstaff/cad/c238/params 
> wdir=/scratch/lustreC/w/wagstaff/cad/c238 
> bindir=/home/wagstaff/cado2/cad/build/bin 
> n=3125689403360674686442238587162271614870191554546712146106599732174877919572601957157232217383906337442923589062344243185440088600546712866940680260850904064759715117813559291826802560779301653308472626156931797210764686967801992295095313
> 
> The Perl script issues this command to run bwc:
> /home/wagstaff/cado2/cad/build/bin/linalg/bwc/bwc.pl :complete seed=1 
> thr=4x4 mpi=1x1 matrix=/scratch/lustreC/w/wagstaff/cad/c238/c238.small.bin 
> nullspace=left mm_impl=bucket interleaving=0 interval=1000 mn=64 
> wdir=/scratch/lustreC/w/wagstaff/cad/c238/c238.bwc shuffled_product=1 
> bwc_bindir=/home/wagstaff/cado2/cad/build/bin/linalg/bwc 
> 
> Can I modify this command to make it resume work and not
> start over from the beginning?
> 
> After it writes the solution, I plan to
> touch c238.linalg_done
> and then run the Perl script to finish.
> Will this work?
> 
> Thanks,
> Sam
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