Обсуждение: pg_dump not enough space to create a backup FreeBSD 6.1?

Hi,

Running pg_dump on a FreeBSD 6.1 machine gives me:

[root@s13.nedstars.nl:/data/even]# pg_dump -Ft -f ./my_db-2007-5-16.backup -U user my_db

 /tmp: write failed, filesystem is full
pg_dump: [tar archiver] could not write to tar member (wrote 0,
attempted 86)

pg_dump: *** aborted because of error

[root@s13.nedstars.nl:/data/even]# df -h

Filesystem       Size    Used   Avail Capacity  Mounted on
/dev/aacd0s1g    125G    5.8G    109G     5%    /data
/dev/aacd0s1e    484M     86K    445M     0%    /tmp

The database is, when dumped in text format and gzipped, 40 Mb, so I
assume that there is enough space on the /tmp drive to store the temp
files of the pg_dump.

Is that assumption OK? Can I somehow use another partition to store the
temporaray files without changing my /tmp mount?

TIA

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
web: www.askesis.nl

On Wed, May 16, 2007 at 02:36:45PM +0200, Joost Kraaijeveld wrote:
> Hi,
>
> Running pg_dump on a FreeBSD 6.1 machine gives me:
>
> [root@s13.nedstars.nl:/data/even]# pg_dump -Ft -f ./my_db-2007-5-16.backup -U user my_db
>
>  /tmp: write failed, filesystem is full
> pg_dump: [tar archiver] could not write to tar member (wrote 0,
> attempted 86)
>
> pg_dump: *** aborted because of error
>
> [root@s13.nedstars.nl:/data/even]# df -h
>
> Filesystem       Size    Used   Avail Capacity  Mounted on
> /dev/aacd0s1g    125G    5.8G    109G     5%    /data
> /dev/aacd0s1e    484M     86K    445M     0%    /tmp
>
> The database is, when dumped in text format and gzipped, 40 Mb, so I
> assume that there is enough space on the /tmp drive to store the temp
> files of the pg_dump.
>
> Is that assumption OK? Can I somehow use another partition to store the
> temporaray files without changing my /tmp mount?

tar is what's creating the temp files, not pg_dump. AFAIK it obeys the
TEMP environment variable, so changing that should make things good.
--
Jim Nasby                                      decibel@decibel.org
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)

Joost Kraaijeveld <J.Kraaijeveld@Askesis.nl> writes:
> Running pg_dump on a FreeBSD 6.1 machine gives me:

> [root@s13.nedstars.nl:/data/even]# pg_dump -Ft -f ./my_db-2007-5-16.backup -U user my_db

>  /tmp: write failed, filesystem is full
> pg_dump: [tar archiver] could not write to tar member (wrote 0,
> attempted 86)

Do you have a specific reason to use -Ft rather than -Fc mode?  -Fc
does not have this limitation, nor some other ones.

While I don't wish to actually deprecate -Ft, I wonder whether the
documentation should provide a more forceful recommendation to use
-Fc unless you have a good reason not to.

            regards, tom lane

Joost Kraaijeveld wrote:
> Can I somehow use another partition to store
> the temporaray files without changing my /tmp mount?

Set the environment variable TMPDIR.

--
Peter Eisentraut
http://developer.postgresql.org/~petere/