06-07-2011
What shell are you using? Not all shells understand the |& pipe. And as far as I know, this one only redirects stderr to the next command, not both stdout and stderr.
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LEARN ABOUT DEBIAN
pipebench
pipebench(1) pipebench(1)
NAME
pipebench - Shows speed of stdin/stdout communication
SYNOPSIS
pipebench [ -ehqQIoru ] [ -s file | -S file ] [ -b bufsize ]
DESCRIPTION
Measures the speed of stdin/stdout communication.
OPTIONS
-h Displays a help message and exits.
-e If an error occurs, exit (breaking the pipe between stdin and stdout. By default an error message is printed to stderr and the pro-
gram continues.
-q Only show summary stats.
-Q Don't show running speed or summary stats. Same as -q -o. Can be used to play with buffer size.
-o Don't show summary.
-b bufsize
Use this buffer size, in bytes.
-r Just show raw speed, no fancy stuff. And no summary.
-s file
Write status to file instead of stderr.
-S file
Write status to file instead of stderr.
-I Use 1kB = 1000B, instead of the default 1024B.
-u Don't convet to units (kilo, Mega, etc...)
EXAMPLES
Benchmark and show progress of backup
# (cd /home/; tar cf - .) | pipebench | (cd /mnt/backup/; tar xf -)
A number to brag to your friends about
$ dd if=/dev/zero bs=80k count=60k 2> /dev/null | ./pipebench -q > /dev/null
BUGS
No known bugs... yet.
SEE ALSO
dd(1), cat(1)
AUTHOR
Pipebench was written by Thomas Habets <thomas@habets.pp.se>
pipebench 18th Apr, 2003 pipebench(1)