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

[Hal Rosenstock]

On Thu, 2008-04-03 at 14:53 +0000, Tang, Changqing wrote:
> One other thing I hope to talk is some fabric query functionalities for normal user,
> not only just for root. This is at IB verbs level, not rdma_cm level.
> 
> for example, in MPI, process A know the HCA guid on another node. After running for
> some time, the switch is restarted for some reason, and the whole fabric is re-configured.
> 
> Now process A wants to know if the port lid on another node has changed or not, it knows
> the HCA guid,  is there any function to query this ?

> I know as root, we can use the mad/umad library to do this kind of query, I want to do
> such query in MPI, which is a normal user.

In the IB arch, there are SA registrations and queries for the specific
example you used. However, these are not directly exposed to Linux user
space directly (for the normal user as opposed to MAD user (note there
are some difficulties in making this available to the normal user)) (at
least not yet AFAIK). While these are not (direct) fabric query (really
SA query), they serve the same function in a different way.

-- Hal

> --CQ Tang, HP-MPI
> 
> 
> 
> > -----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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