Re: [ledbat] list of reasons for needing multiple TCP connections

On Thu, Nov 20, 2008 at 2:54 PM, Caitlin Bestler <cait@asomi.com> wrote:

> As a point of reference, part of the justification for doing iSCSI
> over multiple TCP connections within a session was because "It
> might be impossible to achieve the full bandwidth capability
> of the underlying physical transport by using a single TCP
> connection."
>
> [http://storageconference.org/2003/papers/19-Meth-Design.pdf
> section 2.2]
>
>
Good stuff there, the relevant reasoning that might be sucked into a LEDBAT
paper include:

              It might be impossible to achieve the full bandwidth capa-
              bility of the underlying physical transport by using a sin-
              gle TCP connection (possibly due to the TCP window
              size and the round-trip-time of TCP acknowledgements
              over long distances). Some protocols, like SCTP, auto-
              matically and transparently distribute their traffic over a
              number of connections in order to achieve the full band-
              width. There may also be several physical interconnects
              (i.e. separate cables) connecting the initiator and target,
              and it would be most desirable to aggregate and simulta-
              neously utilize all such existing physical connections.

-- 
Robb Topolski (robb@funchords.com)
Hillsboro, Oregon USA
http://www.funchords.com/