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Re: [nfsv4] IETF 102 nfsv4 WG meeting go/no-go

Trond Myklebust <trondmy@gmail.com> Thu, 17 May 2018 03:11 UTC

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References: <89A4F7ED-2658-492C-BDAC-02193C956C33@oracle.com> <C65BBF0E-80B6-4896-8604-08DA177FDE8E@gmail.com> <20180517012607.GA9355@fieldses.org>
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From: Trond Myklebust <trondmy@gmail.com>
Date: Wed, 16 May 2018 23:10:54 -0400
Message-ID: <CAABAsM519qhPk4mMmzvcjug0siE=yFPOkCpgWh1Qco+E4ZtSAQ@mail.gmail.com>
To: Dr James Bruce Fields <bfields@fieldses.org>
Cc: Thomas D Haynes <loghyr@gmail.com>, "nfsv4@ietf.org" <nfsv4@ietf.org>
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Subject: Re: [nfsv4] IETF 102 nfsv4 WG meeting go/no-go
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On Wed, 16 May 2018 at 21:26, J. Bruce Fields <bfields@fieldses.org> wrote:

> On Mon, May 07, 2018 at 08:18:01AM -0700, Tom Haynes wrote:
> >
> >
> > > On May 7, 2018, at 8:12 AM, Chuck Lever <chuck.lever@oracle.com>
wrote:
> > >
> > > https://datatracker.ietf.org/meeting/important-dates/
> > >
> > > Says the cut-off for requesting a meeting room is June 1, 2018.
> > >
> > > I can think of a few agenda topics that are relevant at this time:
> > >
> > > - Tom/Trond have some virtualization-related extensions and other
protocol fixups
> >
> > draft-haynes-nfsv4-delstid-00 <
https://datatracker.ietf.org/doc/draft-haynes-nfsv4-delstid/>

> What's the motivation for WANT_OPEN_XOR_DELEGATION?


What's the motivation for asking for a delegation _and_ an open stateid?
That means you have to return 2 objects instead of just one.

The WANT_OPEN_XOR_DELEGATION  option authorises the server to return a
delegation without the open stateid, which cuts down on the amount of
traffic between the client and server. Yes, you could just ask for a
delegation using WANT_DELEGATION, but if the server is unable to hand one
out, it will return an error, and you're back to sending an OPEN..

Cheers
   Trond

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