[Cado-nfs-discuss] What to do after a crash?

Nicolas RUFF nicolas.ruff at gmail.com
Tue Sep 16 12:28:19 CEST 2014


Well, 3.1 GB of data survived, so I guess there might be something to
recover :) Thanks for your help!

$ tree
.
├── c154.db
├── c154.db-shm
├── c154.db-wal
├── c154.log
├── c154.upload
│   ├── c154.sieving.45250000-45260000.ptmcec.gz
│   ├── c154_sieving_45250000-45260000.ur9l6a.stderr0
│   ├── c154_sieving_45260000-45270000.3dnvh2.stderr0
│   ├── c154.sieving.45260000-45270000.a7meqg.gz
│   ├── c154.sieving.45270000-45280000.8z3k2c.gz
│   ├── c154_sieving_45270000-45280000.sv_s9h.stderr0
│   ├── c154_sieving_45280000-45290000.iibaeg.stderr0
│   ├── c154.sieving.45280000-45290000.u8f4mv.gz
│   ├── c154_sieving_45290000-45300000.5a9lxo.stderr0
│   ├── c154.sieving.45290000-45300000.izcnfd.gz
│   ├── c154.sieving.45300000-45310000.li1ax5.gz
...
│   ├── c154_sieving_77300000-77310000.9r6tx3.stderr0
│   ├── c154.sieving.77300000-77310000.kfi4j1.gz
│   ├── c154.sieving.77310000-77320000.17wx0w.gz
│   ├── c154_sieving_77310000-77320000.fwj74_.stderr0
│   ├── c154_sieving_77320000-77330000.a61ute.stderr0
│   └── c154.sieving.77320000-77330000.jsv5w0.gz
├── c154.wucmd
└── client
    ├── download
    │   ├── c154.factorbase.roots.gz
    │   ├── c154.polyselect2.poly
    │   ├── las
    │   ├── server.f1132bbe.pem
    │   └── WU.localhost
    └── localhost.work
        ├── c154.sieving.77330000-77340000.gz
        └── localhost.log

4 directories, 6428 files


On Tue, Sep 16, 2014 at 11:33 AM, Alexander Kruppa <
alexander.kruppa at inria.fr> wrote:

> ----- Original Message -----
> > From: "Nicolas RUFF" <nicolas.ruff at gmail.com>
> > To: cado-nfs-discuss at lists.gforge.inria.fr
> > Sent: Tuesday, 16 September, 2014 11:06:13 AM
> > Subject: [Cado-nfs-discuss] What to do after a crash?
> >
> > Hello,
> >
> > Sorry for the newbie question. I have been running a quite long
> > factorization job on my workstation, and for some reason it crashed
> after a
> > few weeks.
> > [...]
> > OSError: [Errno 2] No such file or directory:
> > '/tmp/cado.PgpD3dAfkM/c154.factorbase.roots.gz'
> > FAILED ; data left in /tmp/cado.PgpD3dAfkM
> >
> > $ ls /tmp/cado.PgpD3dAfkM/
> > c154.db  c154.db-shm  c154.db-wal  c154.log  c154.upload  c154.wucmd
> client
> >
> > Now the question: is there any way to resume computation from the point
> it
> > has stopped?
> >
> > Thank you,
> > - Nicolas RUFF
>
> There should be more files in the working directory than your "ls" command
> shows.
> It is possible that a system housekeeping job has deleted some files in
> /tmp/.
>
> The first thing I'd do is copy the contents of
> /tmp/cado.PgpD3dAfkM/c154.upload/
> to somewhere safe; those files include the siever output files which are
> the most
> computationally expensive part of the factorization.
>
> Can you please send me the output of
> cd /tmp/cado.PgpD3dAfkM/c154.upload/; ls
> so I can tell which files may have been deleted and which remain? If any
> substantial number of files survived, we can start a new factorization
> and import the already existing files; if no or very few files remain,
> I'm afraid the only real option is to start over from scratch.
>
> Alex
>
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