Re: EXP ....FILE=(pipe to compress)

From: Tommy <tcusan_at_yahoo.com>
Date: Fri, 23 Oct 1998 16:37:41 -0700
Message-ID: <36312154.19DBFCDC@yahoo.com>

Calculating the size of an export file.

---

  % mknod /tmp/exp_pipe p
  % exp file=/tmp/exp_pipe <other options> &
  % dd if=/tmp/exp_pipe of=/dev/null bs=1024

  This will return the number of of 1K blocks the export file will be in   the following format :

        <no. of 1K blocks>+0 records in
        <no. of 1K blocks>+0 records out

Exporting directly to tape - an example

---

  A full database export to a QIC 150 (150 Megabytes capacity)   VOLSIZE should be < tape capacity

  % exp userid=system/manager full=y file=/dev/rmt/0m volsize=145M

  After EXP has written <VOLSIZE> to the tape, it will prompt for next:

        Please mount the next volume and hit <ret> when you are done.

Exporting to tape via unix named pipes

---

  Note: 'dd' for tape devices may need 'bs=8k' or similar depending on tape

  % mknod /tmp/exp_pipe p                               # Make the pipe
  % dd if=/tmp/exp_pipe of=<tape device> &    # Write from pipe to tape
  % exp file=/tmp/exp_pipe <other options>       # Export to the pipe

Jorge Meirim wrote:

> Try www.oramag.com and the read one of the 2 flavours about this subject.
> (One use mkfifo and other one mknod).
> "This is not the fish... but intends to be the line and..."
> J. Meirim
>
> BJ Miller escreveu na mensagem <700heq$7th$1_at_cletus.bright.net>...
> >Hi,
> >
> >I have a problem at a customer site with EXP. They are unable to export to
> >disk due to filesize limitations (2G) and they are exporting to tape
> >(SLOW!). In researching possible solutions I read on a private newsgroup
> >that someone was able to 'pipe it to a compress', however EXP doesn't
> >exactly respond to the normal shell manipulations.
> >
> >Is there a way in Unix to specify an in-line compress?
> >
> >Thanks in advance,
> >
> >BJ
> >
> >
Received on Fri Oct 23 1998 - 18:37:41 CDT