Re: [PATCH 0/3] Provide more fine grained control over multipathing

[Johannes Thumshirn]

On Mon, Jun 04, 2018 at 02:46:47PM +0300, Sagi Grimberg wrote:
> I agree with Christoph that changing personality on the fly is going to
> be painful. This opt-in will need to be one-host at connect time. For
> that, we will probably need to also expose an argument in nvme-cli too.
> Changing the mpath personality will need to involve disconnecting the
> controller and connecting again with the argument toggled. I think this
> is the only sane way to do this.

If we still want to make it dynamically, yes. I've raised this concern
while working on the patch as well.

> Another path we can make progress in is user visibility. We have
> topology in place and you mentioned primary path (which we could
> probably add). What else do you need for multipath-tools to support
> nvme?

I think the first priority is getting nvme notion into multipath-tools
like I said elsewhere and then see. Martin Wilck was already working
on patches for this.

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Johannes Thumshirn                                          Storage
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