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From:   NeilBrown <neilb@suse.com>
To:     Tom Talpey <tom@talpey.com>, Olga Kornievskaia <aglo@umich.edu>,
        Chuck Lever <chuck.lever@oracle.com>
Date:   Wed, 12 Jun 2019 09:21:59 +1000
Cc:     Anna Schumaker <Anna.Schumaker@netapp.com>,
        Trond Myklebust <trondmy@hammerspace.com>,
        Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH 0/9] Multiple network connections for a single NFS mount.
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On Tue, Jun 11 2019, Tom Talpey wrote:
>
> I really hope nconnect is not just a workaround for some undiscovered
> performance issue. All that does is kick the can down the road.

This is one of my fears too.

My current perspective is to ask
  "What do hardware designers optimise for".
because the speeds we are looking at really require various bits of
hardware to be working together harmoniously.

In context, that question becomes "Do they optimise for single
connection throughput, or multiple connection throughput".

Given the amount of money in web-services, I think multiple connection
throughput is most likely to provide dollars.
I also think that is would be a lot easier to parallelise than single
connection.

So if we NFS developers want to work with the strengths of the hardware,
I think multiple connections and increased parallelism is a sensible
long-term strategy.

So while I cannot rule out any undiscovered performance issue, I don't
think this is just kicking the can down the road.

Thanks,
NeilBrown

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