FW: [openib-general] Minutes from DAPL BOF at OpenIB Workshop
panda at cse.ohio-state.edu
Thu Feb 10 19:01:17 PST 2005
> For kDAPL:
> The iSER has been submitted to Open Ib by Voltaire already.
> NFS-RDMA is at http://sourceforge.net/projects/nfs-rdma/.
> For uDAPL: Oracle, DB2 and MPI.
> I am not aware if there is an open source MPI version on uDAPL.
As I indicated in my talk at the OpenIB workshop, we are providing a
port of our open source MPI (MVAPICH2) on uDAPL. I also presented some
initial performance results of MVAPICH2/uDAPL/VAPI on IBA and
MVAPICH2/uDAPL/GM on Myrinet. We are currently testing/tuning it on
uDAPL support on other interconnects. We will be releasing this
version of MPI in the next few weeks. Once the uDAPL layer is
available for OpenIB, this MPI version can also run on top of that
This will allow the community to have an open source MPI version on
uDAPL for various (existing and emerging) interconnects.
> These are publicly known.
> As far as changing the uDAPL or kDAPL APIs.
> There are application already writen to them.
> There are implementation of these APIs on other platforms besides Linux.
> It is in nobody's interest to splinter the user community.
> We need the same API on all platforms.
> If there is a good technical reason to change some specific APIs we
> should consider it.
> But the "burn the spec" approach is not a rationale one.
> If we need to change implementation or some definitions in header files
> it is feasible.
> As far as other transport. As people already mentioned iWARP (IETF
> IBM talked at the BOF about RNIC PI which is being developed as a level
> abstraction on the lower end to "discover" all the need info about
> It is still no ready so we will start with gen2.
> But lets not loose site of what DAPL brings:
> OS independent,
> Transport independent,
> RDMA APIs!!!
> Thanks for jumping on the code so quickly.
> Chair of DAT Collaborative
> 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: Libor Michalek [mailto:libor at topspin.com]
> > Sent: Thursday, February 10, 2005 4:03 PM
> > To: Matt Leininger
> > Cc: Christoph Hellwig; openib-general at openib.org; Tom Duffy
> > Subject: Re: FW: [openib-general] Minutes from DAPL BOF at
> > OpenIB Workshop
> > On Thu, Feb 10, 2005 at 12:36:39PM -0800, Matt Leininger wrote:
> > > On Thu, 2005-02-10 at 12:27 -0800, Grant Grundler wrote:
> > > > On Thu, Feb 10, 2005 at 12:05:58PM -0800, Matt Leininger wrote:
> > > > > uDAPL - Oracle, MPI
> > > > > kDAPL - iSER, NFS over RDMA, Lustre?
> > > >
> > > > Lustre will use Sandia Portals AFAIK.
> > > > Anyone know what Portals will use?
> > > > They might directly program to VAPI or something.
> > > >
> > > There will be a Portals over verbs. At some point there may be a
> > > Portals over kDAPL to support both RDMA ethernet and IB.
> > Yup, that's one of the bigger questions, can it abstract
> > away the differences between two different RDMA technologies?
> > Having a RDMA ethernet and IB providers for kDAPL is
> > insufficient, one would need to show an actual, non-trivial,
> > protocol that works ontop of either provider with no, or
> > little, modification/ifdef'ing.
> > -Libor
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