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Subject: Re: [OMPI users] [mvapich-discuss] MPI-2 over ibverbs/rdma
From: Vivek Satpute (vivekonline86_at_[hidden])
Date: 2009-11-27 02:05:02


Hi,

On Thu, Nov 26, 2009 at 10:35 PM, Chuck Ritter <cfr100_at_[hidden]> wrote:

> On Thu, Nov 26, 2009 at 6:30 AM, Vivek Satpute <vivekonline86_at_[hidden]>
> wrote:
> > Hi Ritter,
> >
> >> > And why those examples in libibverbs-1.1.2 package takes IP address ?
> >> > Do you have any idea about that ?
> >>
> >> Why not?
> >>
> >> I think hostnames and ips were used because they uniquely identify a
> >> node. Why create a parallel naming scheme? It just adds more data to
> >> track.
> >>
> > I agree with this that why there should be parallel naming scheme. But
> > Infiniband devices already have LID and GID naming system to identify
> > devices
> > So instead of using IP address to uniquely identify, we can use those
> > LID/GID.
> > Am I right ?
>
> That would have been another possibility.
>
> You could say the same about the SCSI bus. LUN and bus information is
> mapped to an abstract device so that the user does not have to deal
> with those low level details. In the case of SCSI, the OS handles
> that... maps it into devices. I think IB somewhat follows that model.
>
> Yope. Maybe you are right.

> C
>

Thanks,
Vivek