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Export Oracle data and Compress at same time

Posted on 23-Aug-2005 By Admin No Comments on Export Oracle data and Compress at same time

If one cannot afford to buy extra disk space one can run the export and compress utilities simultaneously. This will prevent the need to get enough space for both the export file AND the compressed export file. Eg:

# Make a pipe

mknod expdat.dmp p # or mkfifo pipe

# Start compress sucking on the pipe in background

compress < expdat.dmp > expdat.dmp.Z &

# Wait a second or two before kicking off the export

sleep 5

# Start the export

exp scott/tiger file=expdat.dmp

Or export accross the network directly into the target database:

Host A:

mknod FIFO.dmp p

exp u/p FILE=FIFO.dmp rest_of_parameters…

Host B:

mknod FIFO2.dmp p

rsh host1 dd if=FIFO.dmp > FIFO2.dmp &

imp u/p FILE=FIFO2.dmp rest_of_parameters

Oracle, SQL scripts

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