Re: [SPDK] Nvmf target namespace specification

[Andrey Kuzmin <andrey.v.kuzmin at gmail.com>]

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Thanks for the quick turnaround, Daniel.

On Fri, May 4, 2018, 20:48 Verkamp, Daniel <daniel.verkamp(a)intel.com> wrote:

> Hi Andrey,
>
> Do you mean on the host (initiator) side, bdev/nvme?  When you are
> connecting to a NVMe-oF target with the NVMe bdev (either via the [Nvme]
> configuration file section or the construct_nvme_bdev RPC method), you are
> specifying the address to a subsystem, and all namespaces in that subsystem
> will be exposed as bdevs.  There is currently no way to specify just a
> single namespace within the subsystem, but we could probably add this if
> there is a reasonable use case that requires it.
>

I don't think it as strong as required, but the case that has triggered my
question above was trying to run bdevperf with its target device
specification against a specific namespace at thee nvmf target.

As is (with effectively just the controller specified), it actually runs
prerry well, but I assume it does so against all namespaces the target
exports via the specified subsystem.

Regards,
Andrey

>
> If you are talking about the target side, you can configure namespaces to
> have a particular ID using the optional second parameter to the Namespace
> line in the [SubsystemN] config sections, or via the optional
> namespace.nsid parameter to the nvmf_subsystem_add_ns RPC method.
>
> Thanks,
> -- Daniel
>
> > -----Original Message-----
> > From: SPDK [mailto:spdk-bounces(a)lists.01.org] On Behalf Of Andrey Kuzmin
> > Sent: Friday, May 4, 2018 10:35 AM
> > To: Storage Performance Development Kit <spdk(a)lists.01.org>
> > Subject: [SPDK] Nvmf target namespace specification
> >
> > Spdk nvmf docs suggest nvmf targets to be specified via
> > traddr/addrfam/traddr/trsvcid tuple. Is there any way to specify the
> > target controller namespace as well?
> >
> > Regards,
> > Andrey
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-- 

Regards,
Andrey

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