Re: Performance of iSCSI, FCIP and iFCP

[Michael Krause <krause@cup.hp.com>]

At 07:50 PM 1/9/2001 -0500, Victor Firoiu wrote:


>In conclusion, from a performance point of view, transporting
>storage connections (SCSI or Fibre Channel) on multiple TCP sessions
>is much more effective than tunneling through a single TCP
>session, and the difference is proportional to the square of the
>number of TCP sessions.

Hence why many of us want to support multiple TCP connections per iSCSI 
session (even if this over a single physical port).  Some of us don't 
believe a single connection is the right solution to achieve maximum 
throughput and focusing in on a strictly single connection objective 
especially if the fabric diameter is large (as some have suggested) is the 
wrong paradigm to pursue.  Note: For hardware or software implementations, 
the cost of multiple connections is rather trivial to support in terms of 
resources and there are advantages w.r.t. QoS and other policies (e.g. 
multi-pathing through a fabric) that one can take advantage of with 
multiple connections.

Nice write up.

Thanks,

Mike