Re: iSCSI: ordered command delivery at the target

[Luben Tuikov <luben@splentec.com>]

Yes, I'm clearly wrong about this.
Sorry to waste your time with this.

"Mallikarjun C." wrote:
> 
> Amir and Julian are correct.  I see a lot of mistaken notions in this note,
> and IIRC, this was discussed several times in the past.
> 
> The SCSI Architecture Model defines the data transfer protocol services
> that are invoked by the SCSI ULP to drive the data transfers - thus technically
> letting an instantiated SCSI task to perform data transfers.  CmdSN is relevant
> only *before* the task is instantiated.  BTW, initiator ULP timeouts are exactly
> meant to take care of the "network latency" issues.
> 
> AFAICT, assigning CmdSN to SNACK would lead to a lot more complexity
> (issuing SNACKs to recover lost SNACKs and....), and I don't see what the
> issue is now.
> 
> Needless to say, I would not recommend either of these.
> --
> Mallikarjun
> 
> Mallikarjun Chadalapaka
> Networked Storage Architecture
> Network Storage Solutions
> Hewlett-Packard MS 5668
> Roseville CA 95747
> cbm@rose.hp.com