Re: iSCSI : Aborting non-SCSI tasks.

[Santosh Rao <santoshr@cup.hp.com>]

Hi Charles,

Yes, this would be sufficient and simple enough for such an event. The
point here being that the iSCSI spec needs to explicitly address this
issue of deterministic termination of non-SCSI command PDUs like text,
nop-out, login, logout, etc.

The solution could be based on a timer with gross recovery on its
expiry. However, such a timer needs to be specified by the protocol and
tunable through an iSCSI login key (timers equivalent to RR_TOV, RA_TOV
in FC).

Regards,
Santosh


Charles Monia wrote:
> 
> Hi Santosh:
> 
> My .02 (again):
> 
> Assuming these transactions are handled in the iSCSI layer:
> 
> a) No abort mechanism is required.  Like a 'ping' operation, these functions
> are expected to complete in some fixed time or not at all.
> 
> b) A timeout indicates the iSCSI layer is broken -- i.e., timeouts are
> fatal.
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