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From: Harris, James R <james.r.harris at intel.com>
Subject: Re: [SPDK] iSCSI initiator
Date: Thu, 02 Nov 2017 16:25:00 +0000
Message-ID: <721155ED-54D8-4E0E-B46D-A207FCBE8523@intel.com>
In-Reply-To: 1509554865.2653.41.camel@intel.com
List-ID: <spdk@lists.01.org>
To: spdk@lists.01.org

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> On Nov 1, 2017, at 9:47 AM, Walker, Benjamin <benjamin.walker(a)intel.com=
> wrote:
> =

> On Wed, 2017-11-01 at 07:02 +0300, =D0=98=D0=B2=D0=B0=D0=BD=D0=BE=D0=B2 =
=D0=90=D0=BB=D0=B5=D0=BA=D1=81=D0=B5=D0=B9 wrote:
>> Hello!
>> As i understand SPDK can realize iSCSI target application. But is it pos=
sible
>> to use it as iSCSI initiator?
> =

> There is no iSCSI initiator in SPDK today, so if you're just looking for a
> userspace iSCSI initiator that already exists see
> https://github.com/sahlberg/libiscsi.
> I'm not familiar with this project beyond a cursory glance, but it seems =
to fit
> the bill.
> =

> That said, there is both an NVMe-oF initiator and a virtio-scsi initiator=
 in
> SPDK already, so an iSCSI initiator would definitely fit into the toolkit=
. In
> order to consider adding one, I think we have to figure out how an SPDK
> implementation would be fundamentally better than the already existing
> implementations (i.e. libiscsi). If anyone has any insight into that
> implementation or any other, and has thoughts on how SPDK could do a fast=
er one,
> it would be much appreciated.

I think libiscsi should work well.  it has async interfaces so it fits the =
SPDK asynchronous polling model.

Building an iSCSI bdev module on top of libiscsi should be fairly straightf=
orward.  This would be really useful for presenting iSCSI LUNs to VMs via v=
host.

> =

> Thanks,
> Ben
> =

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