Date: Fri, 9 Jul 2010 02:32:18 +0200 From: Thomas <fwd@gothschlampen.com> To: Jozsi Avadkan <jozsi.avadkan@gmail.com> Cc: FreeBSD Mailing list <freebsd-questions@freebsd.org> Subject: Re: slow down dd - how? Message-ID: <20100709003218.GA10163@gothschlampen.com> In-Reply-To: <1278604252.12047.13.camel@localhost> References: <1278604252.12047.13.camel@localhost>
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On Thu, Jul 08, 2010 at 05:50:52PM +0200, Jozsi Avadkan wrote: Hi, > How can I slow down dd? > > I don't want to slow down the pc, when generating a big file [~40 > GByte]. > > Does ionice work properly? > > Thank you for any help! :\ you could use some creative shellscripting (probably in addition to idprio): dd if=/dev/zero bs=1024k | ( dd bs=1024k count=10; sleep 3 ) | dd bs=1024k of=/dev/somewhere This pauses for 3 seconds for every 10MB written. Try some variations of bs, count and sleep, until you find an acceptable compromise between speed and imposed load. Regards Thomas
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