Re: [nfsv4] channel attribute negotiation
"J. Bruce Fields" <bfields@fieldses.org> Mon, 11 October 2010 15:15 UTC
Return-Path: <bfields@fieldses.org>
X-Original-To: nfsv4@core3.amsl.com
Delivered-To: nfsv4@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id DC69F3A6B15 for <nfsv4@core3.amsl.com>; Mon, 11 Oct 2010 08:15:23 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.594
X-Spam-Level:
X-Spam-Status: No, score=-2.594 tagged_above=-999 required=5 tests=[AWL=0.005, BAYES_00=-2.599]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s0wA4efy+lDi for <nfsv4@core3.amsl.com>; Mon, 11 Oct 2010 08:15:22 -0700 (PDT)
Received: from fieldses.org (fieldses.org [174.143.236.118]) by core3.amsl.com (Postfix) with ESMTP id A16763A6B28 for <nfsv4@ietf.org>; Mon, 11 Oct 2010 08:14:58 -0700 (PDT)
Received: from bfields by fieldses.org with local (Exim 4.71) (envelope-from <bfields@fieldses.org>) id 1P5K6V-0008C3-9J; Mon, 11 Oct 2010 11:15:55 -0400
Date: Mon, 11 Oct 2010 11:15:55 -0400
From: "J. Bruce Fields" <bfields@fieldses.org>
To: Mike Eisler <mre-ietf@eisler.com>
Message-ID: <20101011151555.GB27462@fieldses.org>
References: <20101009145219.GB25224@fieldses.org> <79b064429830760e47e7293de8783d8f.squirrel@webmail.eisler.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <79b064429830760e47e7293de8783d8f.squirrel@webmail.eisler.com>
User-Agent: Mutt/1.5.20 (2009-06-14)
Cc: nfsv4@ietf.org
Subject: Re: [nfsv4] channel attribute negotiation
X-BeenThere: nfsv4@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: NFSv4 Working Group <nfsv4.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/nfsv4>, <mailto:nfsv4-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/nfsv4>
List-Post: <mailto:nfsv4@ietf.org>
List-Help: <mailto:nfsv4-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/nfsv4>, <mailto:nfsv4-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 11 Oct 2010 15:15:24 -0000
On Mon, Oct 11, 2010 at 06:18:12AM -0700, Mike Eisler wrote: > > On Sat, October 9, 2010 7:52 am, J. Bruce Fields wrote: > > I noticed a couple small typos as I was reading the discussion of > > channel attribute negotiation in 5661 section 18.36.3: > > > > - The heading of the dicussion should be > > "csa_fore_chan_attrs, csa_back_chan_attrs:" > > not > > "csa_fore_chan_attrs, csa_fore_chan_attrs:" > > - "with more operations than ca_maxoperations" should be "with > > more operations than the negotiatiated maximum". > > Please report these as errata to ensure that RFC5661-bis corrects these. OK, done. > > Some clarification in the case of ca_maxoperations might be useful: is > > the client expted to send a hopeful value (hey, let me send you > > thousands of ops!) or the minimum value that it needs to function (e.g. > > number of operations it requires to send its open compound)? The linux > > client currently does the latter. > > > > The latter seems the more important number to communicate, so perhaps we > > should advise clients to send their required minimum, and servers to > > decrease the client-proivded number only with the understanding that > > this may prevent the client from continuing. > > Sure but in a client insists it needs one million ops per request, this is > a meaningless distinction. Yeah, to make the question interesting you'd have to imagine a client that, say, needed 8 ops per compound to function, but could take advantage of a few optimizations if it got 16. And a server implementation which cared much how many it gave up. > What we get when the session is created is an unambiguous agreement about > what can be supported on each channel. I'm open to ideas about how we > could do better. Fair enough. Thinking about it some more, there may be a little ambiguity here, but probably nothing worth worrying about. --b.
- [nfsv4] channel attribute negotiation J. Bruce Fields
- Re: [nfsv4] channel attribute negotiation Mike Eisler
- Re: [nfsv4] channel attribute negotiation J. Bruce Fields