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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: MaxRecvPDULength questionHi Julo & Bob, I support Bob on this change to the completely unambiguous "MaxRecvDataSegmentLength" Cheers, Ken -- Ken Sandars Eurologic Systems Ltd ksandars@eurologic.com On Monday 10 June 2002 1:51 pm, Julian Satran wrote: > Bob, > > I can do that too - and if we wait for consensus for a name - well that > will be forever. > So if at least one more person wants the change and nobody is against we > will have it as you wish if not then not. > > Julo > > > > > "Robert D. Russell" <rdr@io.iol.unh.edu> > 06/10/2002 10:42 AM > Please respond to "Robert D. Russell" > > > To: Julian Satran/Haifa/IBM@IBMIL, <ips@ece.cmu.edu> > cc: > Subject: Re: MaxRecvPDULength question > > > > > Julian: > > It has been stated several times that at this late stage we > should not be requesting changes that are just preferences. > > Nevertheless, due to apparent misunderstandings of its meaning, > the key named MaxRecvPDULength in draft 12 is apparently going > to have its name changed in draft 13. > > Fine. No problem. > > However, to remove all possibility of future misunderstandings, > why don't we give it a name that says precisely what it is: > > MaxRecvDataSegmentLength > > That way, the first sentence in the third paragraph of section > 9.7.1 would begin: > > "DataSegmentLength MUST not exceed MaxRecvDataSegmentLength > for the direction it is sent ..." > > which seems to me to be the classic definition of a maximum. > > The issue of changing the name from MaxRecvPDULength started with an > e-mail sent by Luben Tuikov on 21 May (who, by the way, did NOT want > to change the name, just its meaning), and was followed by a short > flurry of e-mails under the thread "MaxRecvPDULength question". > > Some of the names suggested on that thread were: > MaxRecvDataLength (21 May by Paul Konig) > MaxRecvDataSegmentSize (21 May by Pat Thaler) > MaxRecvDataSegSize (21 May by Pat Thaler) > MaxRecvPDUDataSize (22 May by Pat Thaler) > > and what got into the draft was this last suggestion by Pat. > > I don't believe there was a consensus for this choice (probably, as > was stated by Pat several times, because most people don't really see > the need for a renaming and didn't bother to participate in the thread). > Therefore, I would ask you to reconsider the new name and ask for > consensus on the new choice. > > I believe the name MaxRecvDataSegmentLength is so closely linked to the > name DataSegmentLength that its meaning should be clear to even a > first-time reader, especially given the statement in section 9.7.1 > quoted above. > > Furthermore, there clearly is the concept of DataSegmentLength elsewhere > in the standard -- every PDU has a DataSegmentLength field. > I could find no concept of PDUDataSize (or even "data size") elsewhere in > the current draft. > > > Whether or not this renaming happens (again), I believe there should be > the following rewordings to be more precise in order to avoid any > ambiguities and/or future misinterpretations. > > The first sentence in section 9.10.5 should be changed to read: > > "The DataSegmentLength in a Text Request MUST NOT exceed the > iSCSI target's MaxRecvDataSegmentLength (a per connection and per > direction negotiated parameter)." > > and the first sentence in section 9.11.6 should be changed to read: > > "The DataSegmentLength in a Text Request MUST NOT exceed the > iSCSI initiator's MaxRecvDataSegmentLength (a per connection and per > direction negotiated parameter)." > > Finally, two sentences in section 11.13 should be changed to read: > > "The initiator or target declares the maximum DataSegmentLength in > bytes it can receive in an iSCSI PDU." > > and > > "The transmitter (initiator or target) is required to send PDUs with a > DataSegmentLength not exceeding MaxRecvDataSegmentLength of the > receiver." > > > Thank you for your consideration, > > > Bob Russell > InterOperability Lab > University of New Hampshire > rdr@iol.unh.edu > 603-862-3774
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