Re: throttle IO to multiple devices in one group

[Nikolay Borisov <kernel-6AxghH7DbtA@public.gmane.org>]

On 09/09/2016 02:32 AM, Guang Yang wrote:
> Hello,
> We are evaluating to use cgroups to isolate different applications on
> Linux. One use case of our application is that it reads/writes to
> multiple block devices and we would like throttle the IO for each
> application to each devices via blkio.throttle.read_iops_device.
> However, it looks like each group can only configure one device.
> 
> Am I miss anything? Is there a way to support such semantic - limit
> the number of reads to multiple devices within one group?
> 
> Thanks very much.
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[root@kernighan c11]# cat blkio.throttle.read_bps_device 
[root@kernighan c11]# echo "253:12 1600000" > blkio.throttle.read_bps_device
[root@kernighan c11]# echo "253:13 1600000" >> blkio.throttle.read_bps_device
[root@kernighan c11]# cat blkio.throttle.read_bps_device
253:13 1600000
253:12 1600000


It works just fine (this is on 4.4 kernel though)

Regards, 
Nikolay