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

[Hal Rosenstock]

On Thu, 2008-04-03 at 14:40 +0000, Tang, Changqing wrote:
> 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.

Yes, these two IB subnets need two different subnet prefixes. (I think
it's more than just HP MPI which needs this).

-- Hal

> 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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> >
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