datapump export to pipe

  • From: Tony Adolph <tony.adolph.dba@xxxxxxxxx>
  • To: Oracle Discussion List <oracle-l@xxxxxxxxxxxxx>
  • Date: Tue, 6 Oct 2009 13:53:42 +1300

Hi all,

Env:  Oracle EE 10.2.0.4  RH 4.6

I'm doing exports to a filesystem with limited space so want to compress the
export on the fly, e.g.

.
.
cd $BACKUP_DIR
if [ ! -p $PIPE ] ; then
    mkfifo $PIPE
fi

echo "gzipping from $PIPE ..."
nohup gzip -c  < $PIPE > ${DMPFILE}.gz &

echo "expdp started ..."
expdp $CREDENTIALS \
      DIRECTORY=DP_EXP_DIR \
      DUMPFILE=$PIPE \
      FULL=y \
      LOGFILE=$LOGFILE
.
.

BUT,.. as you may have guessed, my plan is flawed as expdp doesn't allow
writing to a file that already exists, and of course the pipe must (exist
that is)

Does anyone have a work around for this (that doesn't involve upgrading to
11g, buying new disks, exporting to a different dir)

Thanks in advance
Tony

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