Discussion related to cado-nfs

[Chris Murphy <chrismrph0@gmail.com>]

To follow-up--this was my mistake.  I previously said that I ran the same command when I tried to recover but that was wrong.  I had changed the wdir argument to the new backup directory I created.  Once I changed wdir back to the original path, the script recovered my previous work and completed.

Great software!  Thank you.

On Fri, Jun 28, 2013 at 1:45 PM, Chris Murphy <chrismrph0@gmail.com> wrote:

Hi,

I am using cado-nfs 1.1 to factor a c155 number.  The cadofactor.pl script crashed upon starting the linear algebra stage.   I see that this issue and a workaround was previously discussed on the list:  http://lists.gforge.inria.fr/pipermail/cado-nfs-discuss/2012-July/000075.html.  I will remove the mpich2 package and try again.

However, now I can't recover using the work files I've already accumulated.  I made a backup of the work directory when cadofactor.pl crashed.  I ran the same cadofactor.pl command again after I modified my mach_desc file to include only localhost and remove the mpi=1 argument.

When prompted, I chose "l" to clean up but continue at the checkpointed linear algebra stage.   Unfortunately, the script deleted all my relations files and started the polynomial stage again.  After the polynomial stage finished, it began sieving again.  Is there any way to recover the work the script has already done?  I still have a backup of the work directory.

The "Trying to recover..." operation marks several previous stages as not done even though they did complete.

After choosing "l", I see these messages:

Info:polynomial selection not flagged as done, flagging factbase as not done

Info:polynomial selection not flagged as done, flagging sieve as not done

Info:factor base not flagged as done, flagging freerels as not done

Info:sieve and purge not flagged as done, flagging dup as not done

Info:duplicates not flagged as done, flagging purge as not done

Info:singletons and cliques not flagged as done, flagging merge as not done

Info:merge not flagged as done, flagging replay as not done

I have 436 files in my work directory, including these:

root@master:/opt/cado-nfs-1.1# ls /fdata/cadorecover/*done

/fdata/cadorecover/c155.dup_done       

/fdata/cadorecover/c155.merge_done   

/fdata/cadorecover/c155.replay_done

/fdata/cadorecover/c155.factbase_done 

/fdata/cadorecover/c155.polysel_done  

/fdata/cadorecover/c155.sieve_done

/fdata/cadorecover/c155.freerels_done  

/fdata/cadorecover/c155.purge_done

Thanks.

Chris