Re: rbd perf image iostat - rbdmap write latency

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On Mon, Apr 27, 2020 at 7:38 AM Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx> wrote:

>
> I guess this is not good for ssd (samsung sm863)? Or do I need to devide
> 14.8 by 40?
>

The 14.8 ms number is the average latency coming from the OSDs, so no need
to divide the number by anything. What is the size of your writes? At 40
writes/sec against an SSD-backed cluster, I can only hope they are large
IOs.


>
> rbd perf image iostat
>
> NAME                       WR    RD   WR_BYTES   RD_BYTES     WR_LAT
> RD_LAT
> rbd.ssd/vps-test         40/s   0/s  5.0 MiB/s      0 B/s   14.84 ms
> 0.00 ns
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-- 
Jason
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