[ofa-general] Re: [ewg] OFED March 24 meeting summary on OFED 1.4 plans

[Tang, Changqing]

You have a system, all HCAs have two ports, all port 1 are connected to the first switch,
all port 2 are connected to the second switch, there is NO link between the two switches.
We call this system has two physically separated fabrics. If you have a bridge link
between the two switches, then it becomes a single fabric.

The same thing for multiple HCAs on nodes.

The problem is, from MPI side, (and by default), we don't know which port is on which
fabric, since the subnet prefix is the same. We rely on system admin to config two
different subnet prefixes for HP-MPI to work.

No vendor has claimed to support this.

--CQ

> -----Original Message-----
> From: Hal Rosenstock [mailto:hrosenstock at xsigo.com]
> Sent: Thursday, April 03, 2008 9:32 AM
> To: Tang, Changqing
> Cc: Erez Zilber; Tziporet Koren; ewg at lists.openfabrics.org;
> general at lists.openfabrics.org
> Subject: RE: [ofa-general] Re: [ewg] OFED March 24 meeting
> summary on OFED 1.4 plans
>
> CQ,
>
> On Thu, 2008-04-03 at 14:27 +0000, Tang, Changqing wrote:
> > Can we address multiple-fabrics (physically separated) support ?
>
> Can you elaborate on what you mean by "physically separated" ?
>
> -- Hal
>
> >
> >
> > --CQ Tang
> >
> > > -----Original Message-----
> > > From: general-bounces at lists.openfabrics.org
> > > [mailto:general-bounces at lists.openfabrics.org] On Behalf Of Erez
> > > Zilber
> > > Sent: Thursday, April 03, 2008 8:51 AM
> > > To: Tziporet Koren
> > > Cc: ewg at lists.openfabrics.org; general at lists.openfabrics.org
> > > Subject: [ofa-general] Re: [ewg] OFED March 24 meeting summary on
> > > OFED 1.4 plans
> > >
> > > >
> > > > *OFED 1.4:*
> > > > 1. Kernel base: since we target 1.4 release to Sep we
> target the
> > > > kernel base to be 2.6.27
> > > >     This is a good target, but we may need to stay with
> > > 2.6.26 if the
> > > > kernel progress will not be aligned.
> > > >
> > > > 2. Suggestions for new features:
> > > >
> > > >     * NFS-RDMA
> > > >     * Verbs: Reliable Multicast (to be presented at Sonoma)
> > > >     * SDP - Zero copy (There was a question on IPv6 support
> > > - seems no
> > > >       one interested for now)
> > > >     * IPoIB - continue with performance enhancements
> > > >     * Xsigo new virtual NIC
> > > >     * New vendor HW support - non was reported so far (IBM
> > > and Chelsio
> > > >       - do you have something?)
> > > >     * OpenSM:
> > > >           o Incremental routing
> > > >           o Temporary SA DB - to answer queries and a heavy
> > > sweep is done
> > > >           o APM - disjoint paths (?)
> > > >           o MKey manager (?)
> > > >           o Sasha to send more management features
> > > >     * MPI:
> > > >           o Open MPI 1.3
> > > >           o APM support in MPI
> > > >           o mvapich ???
> > > >     * uDAPl
> > > >           o Extensions for new APIs (like XRC) - ?
> > > >           o uDAPL provider for interop between Windows & Linux
> > > >           o 1.2 and 2.0 will stay
> > > >
> > >
> > > As I wrote in an earlier discussion (~2 months ago), we
> plan to add
> > > tgt (SCSI target) with iSCSI over iSER (and TCP of
> > > course) support. The git tree for tgt already exists on the ofa
> > > server.
> > >
> > > Erez
> > >
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> > >
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