Date: Tue, 09 Feb 2010 11:18:34 +0000 From: Vincent Hoffman <vince@unsane.co.uk> To: freebsd-stable@freebsd.org Subject: Re: ionice in FreeBSD? Message-ID: <4B71448A.1060102@unsane.co.uk> In-Reply-To: <alpine.BSF.2.00.1002090025540.10638@pragry.qngnvk.ybpny> References: <4B685EBA.4020501@minibofh.org> <4B695A1A.1000505@incunabulum.net> <4B696360.3070209@minibofh.org> <4B70E66F.2040203@thebeastie.org> <alpine.BSF.2.00.1002090025540.10638@pragry.qngnvk.ybpny>
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On 09/02/2010 05:44, jhell wrote: > > On Mon, 8 Feb 2010 23:37, mv@ wrote: >> On 3/02/2010 10:52 PM, Jordi Espasa Clofent wrote: >>> >>> Some shell-scripts based on dd or rsync, for example. Even a daily >>> antivirus (ClamAV) scanner means an extensive I/O. >>> >> Programs like Rsync do provide --bwlimit= which work great in slowing >> it down to a desired level. >> >> I can't help but think every program that can use too much IO should >> have it's own IO/speed switch of some sort. >> I can only hope that in general nix evolution that all programs that >> can over use IO will offer a switch to slow it down like Rsync does. >> >> Using a while ionice can be a useful feature it can also be said that >> there are too many instances where it's being used as a hack to deal >> with a program that isn't offering all the functionality that it should. >> >> Cheers, >> Mike >> > > In this thread with due respect to the OP the following might be > considered a fruitless hack but it works!. > > Piping a processes output to dd(1) if you have a choice is a pretty > fair temporary solution if a program does not offer that capability. > > For instance, I don't know if you are familiar with dump(8) at all, > but I use a -P or pipe from that process to dd(8) to slow down the > traffic that it tries to write over the network for backup purposes > and then also give dump(8) a different nice level so it plays along. > > So even if you can cat your output and then read it in from fd(4) > using dd(8) you still have a chance at slowing things down a little or > writing at smaller increments that wont impact your environment as hard. > Something like Port: throttle-1.2 Path: /usr/ports/sysutils/throttle Info: A pipe bandwidth throttling utility Maint: ports@FreeBSD.org B-deps: R-deps: WWW: http://klicman.org/throttle/ Might work too. Vince Vince > ;) >
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