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From: Alexandros Perdikomatis <menippos@otenet.gr>
Organization: UNKNOWN ORGANIZATION
To: pgsql-interfaces@postgresql.org
Subject: Database backup
Date: Sat, 18 Jan 2003 16:17:24 +0200
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Message-Id: <200301181617.24700.menippos@otenet.gr>

Hello everybody!

I use postgresql for long time now, all through libpq (wich I think is the=
=20
most exciting interface) and everything is fine.

When I wanted to backup the base, I was using: "pg_dump mybase > mybase.pgd"
 and "cat mybase.pgd|psql mybase" (don't care about OIDs)

I faced some small problems to finalise the conversion settings between=20
different versions, but at the end everything was fine.

Question: Am I too stupid to use tar?

Some time I had no space on the filesystem to copy all the data in command=
=20
mode (pg_dump) so I thought to pipe pg_dump to tar using a scsi tape archiv=
er=20
as output (/dev/rmt0).
Why doesn't work?

Using just pg_dump we have the output to stdout.
I thought that I missender a parameter or something.
If this is the case, sorry everybody for bothering - I'm just too stupid to=
=20
use the pipe to tar. In this case, PLEASE someone drop a line correcting th=
e=20
syndax for me.

If is not, then we have to thing about piping pg_dump to tape archive.

//a command line view:
# pg_dump mybase|tar cvf /dev/rmt0 - // (and some other versions)
tar: -: Cannot stat: No such file or directory
tar: Error exit delayed from previous errors
# tar xvf /dev/rmt0|psql mybase
EOF    // (!!!)
#

after the "EOF" message from psql the database is, of cource, empty.

*****************

thanks,

Alexandros