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



Maybe ionice could help?

On July 26, 2016 9:26:01 AM CDT, Gianluca Cecchi <gianluca cecchi 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         0.0 0         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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