On Thu, Jul 08, 2010 at 06:44:38PM +0200, Roland Smith wrote: > On Thu, Jul 08, 2010 at 05:50:52PM +0200, Jozsi Avadkan wrote: > > How can I slow down dd? > > Play with the block size parameter (bs). Smaller block sizes means more > reads. The default is 512 bytes, which is very small. > > > I don't want to slow down the pc, when generating a big file [~40 > > GByte].
I don't think Jozsi wants to burn more CPU cycles, just slow the process. Perhaps to attract less attention? Or interfere less with other processes. Nice(1) is a good start but rtprio(1) is probably where he should look. Also consider that writing a program of your own to serve as a slow pipe shouldn't be very hard. Think it would be a good exercise as an introduction to Unix programming. Simply copy stdin to stdout with a usleep(3) between. Pipe dd through your slowpipe program. Someone else has probably written a slow pipe. I haven't looked. -- David Kelly N4HHE, dke...@hiwaay.net ======================================================================== Whom computers would destroy, they must first drive mad. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
