[rhelv6-list] Limiting pvmove speed with control groups doesn't work as expected

[Barry Brimer]

Maybe ionice could help?

On July 26, 2016 9:26:01 AM CDT, Gianluca Cecchi <gianluca.cecchi at gmail.com> wrote:
>On Tue, Jul 26, 2016 at 4:00 PM, Gianluca Cecchi wrote:
>
>>
>>
>> But then if I try to use the same approach with pvmove command:
>>
>> # cgexec -g blkio:30M pvmove -i 60
>>  /dev/mapper/360a9800037543543592442595559337a
>/dev/mapper/3600a098038303769752b495147377857
>>
>> I get
>>
>> Device:            tps    MB_read/s    MB_wrtn/s    MB_read   
>MB_wrtn
>> sdah             29.00        14.50         0.00         43         
>0
>> sdaw             29.00        14.37         0.00         43         
>0
>> sdcp             28.67        14.29         0.00         42         
>0
>> sdde             28.67        14.33         0.00         43         
>0
>>
>> it seems an intermediate ....
>>
>>
>BTW: I also tested using "--sticky" option
>
># cgexec -g blkio:30M --sticky pvmove . . . .
>
>but same behavior. Indeed I don't see any explicit child process
>originated
>by the pvmove command....
>
>Gianluca
>
>
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