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From: Kaushal Shriyan on 19 Jun 2010 08:00
Hi,

I have set ionice -c3 for logrotate application,what happens when the other
program which has asked for disk IO during this period ?

Thanks

Kaushal
From: Alexander Batischev on 20 Jun 2010 02:20
On Sat, Jun 19, 2010 at 05:20:15PM +0530, Kaushal Shriyan wrote:
> Hi,
>
> I have set ionice -c3 for logrotate application,what happens when the other
> program which has asked for disk IO during this period ?
Well, man 1 ionice describes it pretty clear, isn't it?

Class 3 (-c3 option) stands for "Idle", which means that program will use disk
only when others doesn't use it. As stated in man page, "The impact of idle io
processes on normal system activity should be zero", so any other program would
have normal access to disk at full speed (unless there are other processes
using disk right now).

--
Regards,
Alexander Batischev

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