[openib-general] Re: [swg] Re: private data...
Michael Krause
krause at cup.hp.com
Thu Oct 20 09:59:44 PDT 2005
This is really an IBTA issue to resolve and to insure that backward
compatibility with existing applications is maintained. Hence, this
exercise of who is broken or not is inherently flawed in that one cannot
comprehend all implementations that may exist. Therefore, the spec should
use either a new version number or a reserved bit to indicate that there is
a defined format to the private data portion or not. This is no different
than what is done in other technologies such as PCIe. Those applications
that require the existing semantics will be confined to the existing
associated infrastructure. Those that want the new IP semantics set the
bit / version and operate within the restricted private data space
available. It is that simple.
Mike
At 07:31 AM 10/20/2005, Jimmy Hill wrote:
>A Linux uDAPL-based system infrastructure application I am working on at
>IBM currently depends on 64-bytes of Private Data for Connect and Accept
>as well.
>
>-- jimmy
>
>
>
>
>Oracle currently depends on 64 bytes of private data for connect and accept.
>
>
>----- Original Message -----
>From: <mailto:arkady at netapp.com>Kanevsky, Arkady
>To: <mailto:arlin.r.davis at intel.com>Davis, Arlin R ;
><mailto:dat-discussions at yahoogroups.com>dat-discussions at yahoogroups.com ;
><mailto:iod00d at hp.com>Grant Grundler
>Cc: <mailto:swg at infinibandta.org>swg at infinibandta.org ;
><mailto:openib-general at openib.org>openib-general at openib.org
>Sent: Wednesday, October 19, 2005 11:31 AM
>Subject: RE: [dat-discussions] RE: [openib-general] Re: iWARP
>emulationprotocol
>
>Arlin,
>just to clarify, Intel MPI will not have problems with useing less than 64
>bytes
>of private data.
>If a solution will provide you with 48 bytes of private data will it be
>sufficient?
>Arkady
>
>
>Arkady Kanevsky email:
><mailto:arkady at netapp.com>arkady at netapp.com
>Network Appliance phone: 781-768-5395
>375 Totten Pond Rd. Fax: 781-895-1195
>Waltham, MA 02451-2010 central phone: 781-768-5300
>
>
>-----Original Message-----
>From: Davis, Arlin R [mailto:arlin.r.davis at intel.com]
>Sent: Wednesday, October 19, 2005 11:30 AM
>To:
><mailto:dat-discussions at yahoogroups.com>dat-discussions at yahoogroups.com;
>Grant Grundler
>Cc: <mailto:swg at infinibandta.org>swg at infinibandta.org;
><mailto:openib-general at openib.org>openib-general at openib.org
>Subject: RE: [dat-discussions] RE: [openib-general] Re: iWARP
>emulationprotocol
>
>Arkady,
>
>Intel MPI (real consumer of uDAPL) has no problem with this change.
>
>-arlin
>
>
>
>----------
>
>From: dat-discussions at yahoogroups.com
>[mailto:dat-discussions at yahoogroups.com] On Behalf Of Kanevsky, Arkady
>Sent: Wednesday, October 19, 2005 6:40 AM
>To: Grant Grundler; Caitlin Bestler
>Cc: Roland Dreier; swg at infinibandta.org; dat-discussions at yahoogroups.com;
>openib-general at openib.org
>Subject: [dat-discussions] RE: [openib-general] Re: iWARP emulation protocol
>
>Grant,
>The developers of the application(s) in questions are aware of the
>discussion.
>I will leave it to them to respond.
>
>I bring the discussion point at the weekly DAT Collaborative meeting
>which we have every Wednesday.
>
>I appologize that the DAT Collaborative charter does not allow
>to submit contribution without joining DAT Collaborative.
>But this is no different from Linux not accepting any contrubutions
>without proper license.
>Byt be rest assure that as a Chair I bring the concerns
>and suggestions stated in email discussion at the DAT meetings.
>
>Arkady
>
>Arkady Kanevsky email: arkady at netapp.com
>Network Appliance phone: 781-768-5395
>375 Totten Pond Rd. Fax: 781-895-1195
>Waltham, MA 02451-2010 central phone: 781-768-5300
>
>
>
> > -----Original Message-----
> > From: Grant Grundler [mailto:iod00d at hp.com]
> > Sent: Tuesday, October 18, 2005 8:02 PM
> > To: Caitlin Bestler
> > Cc: Grant Grundler; Roland Dreier; Kanevsky, Arkady;
> > swg at infinibandta.org; dat-discussions at yahoogroups.com;
> > openib-general at openib.org
> > Subject: Re: [openib-general] Re: iWARP emulation protocol
> >
> >
> > On Tue, Oct 18, 2005 at 04:40:54PM -0700, Caitlin Bestler wrote:
> > > > Roland (and the rest of us) would like to see someone name a
> > > > real consumer of the proposed interface. ie who depends on
> > > > this change?
> > > > Then the dependency for that use/user can be discussed and
> > > > appropriate tradeoffs made. Make sense?
> > >
> > > Unfortunately not every application that is under
> > development, or even
> > > deployed, can be discussed in a google-searchable public
> > forum. That
> > > especially applies to user-mode development.
> >
> > Well, this is open source. While I don't want to preclude
> > closed source developement, it's usually necessary to have an
> > open source consumer that any open source developer can test with.
> >
> > > So I could have actually tested such applications and still not be
> > > free to cite them here.
> >
> > Understood. I'm not asking *you* to cite one unless you
> > happen to own one of the consumers.
> >
> > > With any luck some of them
> > > are following the discussion and will jump in on their own.
> > > Unfortunately, since they are developing to uDAPL they are
> > unlikely to
> > > be following this discussion.
> >
> > It doesn't help that the DAT yahoo-groups.com mailing list is
> > rejecting my replies. It would be helpful if someone
> > following this forum could share Roland's question with DAT
> > mailing list if it didn't make it there already and possibly
> > explain why naming a consumer is necessary.
> >
> > hth,
> > grant
> >
>
>
>
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