4K writes on nvme device vs that on ext4 running on nvme block device

[Matias Bjørling]

On 10/05/2014 04:23 PM, Bhattacharya, Indranil wrote:
> Thanks Matias. I don't see much difference in your tests between the two. I used 16 threads in FIO. If you increase the number of threads, do you get a larger difference?
>
> -Indranil
>

With 16 threads, and 64qdepth for each, I get:

Plain: 224787 IOPS and avg. 4484us latency
Ext4:  203671 IOPS and avg. 5008us latency

A couple of percent difference, nothing much.