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From: Alexandros Perdikomatis <menippos@otenet.gr>
Organization: UNKNOWN ORGANIZATION
To: pgsql-help@postgresql.org, "D'Arcy J.M. Cain" <darcy@druid.net>
Subject: Re: Database backup
Date: Sun, 19 Jan 2003 17:35:38 +0200
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Cc: pgsql-help@postgresql.org, pgsql-interfaces@postgresql.org
References: <200301181617.24700.menippos@otenet.gr>
	<200301182159.00497.darcy@druid.net>
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=D3=F4=E9=F2 =CA=F5=F1 19 =C9=E1=ED 2003 04:59, =EF/=E7 D'Arcy J.M. Cain =
=DD=E3=F1=E1=F8=E5:
> Redirecting to help list as it seems more appropriate.
>
> On Saturday 18 January 2003 09:17, Alexandros Perdikomatis wrote:
> > Question: Am I too stupid to use tar?
>
> I'm sure not but you may misunderstand what tar does.  Tar is for storing=
 a
> collection of files into an archive.  It expects to find the list of files
> on the command line in one form or another.  If you don't write to a file
> first then all you have is a stream of data, not a file.
>
> > Some time I had no space on the filesystem to copy all the data in
> > command mode (pg_dump) so I thought to pipe pg_dump to tar using a scsi
> > tape archiver as output (/dev/rmt0).
> > Why doesn't work?
>
> What exactly was the problem?  You may just have a device selection issue.
> What system is this on?

Thanks for the reply.
I think I understand what you mean, I just thought that instead of a file=
=20
input, we could have a pipe input.
It runs on a SuSE linux 6.4 (you may ask why this old version, I updated wh=
at=20
was necesary, I like it becouse I have full greek support) and the archiver=
=20
is an old conner DDS-2 scsi tape streamer which is known on the operating=
=20
system as /dev/st0 by the kernel whith a symbolic link to /dev/rmt0.
When I pg_dump on a file, of cource there's no problem. I restore also=20
correctly.
But I would like to pipe this procces. For example: if we type the command:=
=20
# tar cvf /dev/rmt0 *=20
we're going to have all the files in the tree below to the tape.
How can I pipe the output of the pg_dump to it?
Thank you one more time for your reply, I just feel that it must be a way w=
ith=20
it. I face no problems in my C programs using postgresql, (I like it so muc=
h)=20
so I also feel that this problem sould not be in this mailing list becouse=
=20
maybe is a system-side question. If this is the case, sorry everybody.
(one question: where (which mailing list, book or something) is going to he=
lp=20
me installing postgresql to an IBM AiX 4.3 system (RS6000 architecture)?=20
(please)
thanks again.

Alexandros