NVMe performance 4x slower than expected

[Jim Harris]

On Fri, Apr 10, 2015 at 9:07 AM, Tobias Oberstein <
tobias.oberstein at gmail.com> wrote:

> Hi Adrian,
>
> > Dell has graciously loaned me a bunch of hardware to continue doing
>
> FWIW, Dell has a roughly comparable system: Dell R920. But they don't have
> Intel NVMe's on their menu, only Samsung (and FusionIO, but that's not
> NVMe).
>
>  NUMA development on, but I have no NVMe hardware. I'm hoping people at
>>
>
> The 8 NVMe PCIe SSDs in the box we're deploying are a key feature of this
> system (will be a data-warehouse). A single NVMe probably won't have
> triggered (all) issues we experienced.
>
> We are using the largest model (2TB), and this amounts to 50k bucks for
> all eight. The smallest model (400GB) is 1.5k, so 12k in total.
>
>  Intel can continue kicking along any desires for NUMA that they
>> require. (Which they have, fwiw.)
>>
>
> It's already awesome that Intel has senior engineers working on FreeBSD
> driver code! And it would underline Intel's Open-source commitment and tech
> leadership if they donated a couple of these beefy NVMes.
>

Intel has agreed to send DC P3700 samples to the FreeBSD Foundation to put
in the cluster for this kind of work - we are working on getting these
through the internal sample distribution process at the moment.

-Jim