<div dir="ltr"><div>Why would I see 50x the amount of transactions on the lvm volume vs the actual underlying block device ?</div>
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<div>avg-cpu: %user %nice %system %iowait %steal %idle<br> 0.00 0.00 11.41 57.07 0.00 31.51</div>
<div>Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn<br>sda 211.33 0.00 56.12 0 113<br>sdb 268.47 63.05 0.00 128 0<br>
dm-0 14365.52 0.00 56.11 0 113<br>dm-1 0.00 0.00 0.00 0 0<br>sdc 0.00 0.00 0.00 0 0<br>
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<div>211 tps versus 14365 tps. The box is idle and the following command was running:</div>
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<div>dd if=/dev/sdb of=/home/xxxxxxx/bigrandomfile.txt bs=4k count=10000000</div>
<div><br>Sam</div></div>