rbd performance problem on kernel 3.13.6 and 3.18.11

["yangruifeng.09209@xxxxxxx" <yangruifeng.09209@xxxxxxx>]

Hi all！

 

I am testing rbd performance based on kernel rbd dirver, when I compared the result of the kernel 3.13.6 with 3.18.11, my head gets so confused.

 

look at the result, down by a third.

 

	3.13.6 IOPS	3.18.11 IOPS
4KB seq read	97169	23714
4KB seq write	10110	3177
4KB rand read	7589	4565
4KB rand write	10497	2307

 

 

thanks for any help！

 

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