RE: Data in SCSI Response or SCSI Data

["Y P Cheng" <ycheng@advansys.com>]

I am new in this discussion.  Yes, for those of us design an adapter
transmitting the IP packets, we prefer one way instead three different ways.
In fact, we prefer status packet going to the TCP receive buffer and the
data packet going to the data channel for supporting RDMA.  This allows us
the minimum parsing of a packet.

Y.P. Cheng, Connectcom Solutions


-----Original Message-----
From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
csapuntz@cisco.com
Sent: Thursday, August 24, 2000 3:38 PM
To: 'ips@ece.cmu.edu'
Cc: csapuntz@cisco.com
Subject: Re: Data in SCSI Response or SCSI Data


If I remember the discussion correctly, I remember some folks who
were implementing hardware did not like having 3 different
mechanisms for doing the same thing, as this required more logic
and verification.

From a network performance standpoint, there is minimal difference
between sending two iSCSI messages back-to-back and one larger
iSCSI message.

In fact, both iSCSI messages might even share the same packet.

-Costa

Matthew Jacob <mjacob@feral.com> writes:

> > > *	Data and status sent in a SCSI Response packet
> >
> > I think the plan is to remove these last two approaches in the next
> > edition of the spec.
>
> Why? There are a lot of 'trivial' commands that could be done with one
packet.
>
> -matt