Maybe this can help you, doubt it thoug
:

Creating a compressed export file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% mknod /tmp/exp_pipe p # Make the pipe
% compress < /tmp/exp_pipe > export.dmp.Z & # Background compress % exp file=exp_pipe <other options> # Export to the pipe

Reading a compressed export file
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% mknod /tmp/imp_pipe p # Make the pipe
% uncompress < export.dmp.Z > /tmp/imp_pipe & # Background uncompress % imp file=imp_pipe <other options> # Import from the pipe