On Wednesday 06 December 2006 16:50, Mike Christie wrote:
> > For iscsi, we could negotiate a value like MaxBurstLength which says
> > don't send commands with a payload larger than that size. I would guess
> > other transports have something similar. We have to check or make sure
...
> Oh yeah the exception I am thinking about may not be max sectors exactly
> but something close like iscsi's MaxBurstLength limit. Maybe iscsi LLDs
> are supposed to be translating that iscsi limit to max_sectors in which
> case we are talking about the same thing. For this limit we do not want
Sort of off topic, but the iSCSI MaxBurstLength doesn't set the max
transfer
size, it simply is the amount of data that can be sent without a R2T. If the
transfer is larger then you have to wait for the R2T. In practice it ends up
controlling the _minimum_ amount of buffer space that needs to be available
_before_ the transfer starts, otherwise performace sucks.
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