Re: TCP limitations (was Re: ISCSI: Urgent Flag requirement violates TCP.)

[Vern Paxson <vern@ee.lbl.gov>]

> I don't even think that an implementation would need to use SCTP streams
> to get this effect. Since each DATA chunk has a bit marker on it to
> specify if it is the Begining of a message. The streams only make it
> easier to multiplex non-related commands without head of line blocking,
> a valuable option to iSCSI I might add but not needed for framing....

But I'm arguing that marking just the beginning of messages isn't really
what you want, because then when you receive the middle of a message without
having first seen its beginning, you don't know what to do with it.  If,
on the other hand, you use a separate SCTP stream for each ISCSI message,
then the stream # plus the stream sequence number would let the receiver
know exactly where to demux an out-of-order segment ... right?

		Vern