Hi,

I have no number to share, nor did I test with Ceph specifically

However, I saturated a 4*10G NIC, with and without jumbo
In CPU consumption, jumbo frames eated 2 to 3 times less CPU

If you can use jumbo frames, just do it -there is no drawback, and the
gains are appreciable

On 11/08/2017 20:21, Sameer Tiwari wrote:
> Hi,
> 
> We ran a test with 1500 MTU and 9000MTU on a small ceph test cluster (3mon
> + 10 hosts with 2 SSD each, one for journal and one for data) and found
> minimal ~10% perf improvements.
> 
> We tested with FIO for 4K, 8K and 64K block sizes, using RBD directly.
> 
> Anyone else have any experience with this?
> 
> Thanks,
> Sameer
> 
> 
> 
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> 

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