Re: TCP limitations (was Re: ISCSI: Urgent Flag requirementviolates TCP.)

[ronald lee <ronald.c.lee@sun.com>]

I was wondering, is it possible to use TCP option field to
do the framing.  This will require a change to TCP protocol
to handle this option,
but for implementations that want to get the higher performance
they can make this change, else stick with what is there.
Just a suggestion.

Also, is defragging IP packets any issue with iSCSI hardware
implementations ?  We at MaxStrat did a hardware to accelerate
TCP/IP over HIPPI and I had to deal with fragmented IP packets which
caused
a change in the hardware architecture.  Buffer management is a
big issue when trying to accelerate TCP/IP with hardware.  What
happens if a fragment is missing and lets say many IP packets
have a missing fragment or fragments that arrives late.  We might
get our buffers filled with fragments.


-- ron