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DBCP(1)				    BRL-CAD			       DBCP(1)

NAME
       dbcp - double buffered copy

SYNOPSIS
       dbcp [-v] blocksize < infile > outfile

DESCRIPTION
       dbcp is a program for copying data rapidly between devices.

       This command is DEPRECATED. Use dd instead.

       While the primary application is	to move	data between raw devices such
       as tape and disk, it can	also be	used with pipes. No special support is
       required	from the operating system; dbcp	forks into two processes which
       communicate over	a pair of regular pipes	using a	token passing scheme
       to synchronize their reading and	writing	activities. They continue
       copying until an	end of file or error is	detected.  dbcp	reads from the
       standard	input and copies to the	standard output. The argument
       blocksize specifies the number of 512 byte "blocks" to be read or
       written in each record.

       If the -v flag is given,	the number of records processed	is printed
       upon exit.

EXAMPLES
       $ dbcp 16 < /dev/rdk1a >	/dev/rmt0

       dbcp copies the filesystem on dk1a to tape with a record	size of	8K
       bytes (16 * 512). This allows "streaming" tape drives to	operate	a peak
       speed.

       $ tar cf	- . | dbcp 20 >	/dev/rmt0

       The tar process runs independently of the dbcp, which rapidly copies
       the data	to tape	with the usual tar tape	record size of 10K bytes (20 *
       512).

SEE ALSO
       cp(1), dd(1)

AUTHOR
       Douglas P. Kingston III (Davis, Polk, and Wardwell, Chase Manhattan
       Building, New York, NY)

COPYRIGHT
       This software is	Copyright (c) 1993-2019	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       devs@brlcad.org

BRL-CAD				  08/29/2020			       DBCP(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COPYRIGHT | BUG REPORTS

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