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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Bob,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I tend to agree that we should also allow ‘small’ unbounded files without FSS if the sender ensures that they will be < 4GB.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">If there are no objections, I will integrate this change in my B6 draft.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Felix<o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" style="margin-left:36.0pt"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> SIS-CFDPV1 <sis-cfdpv1-bounces@mailman.ccsds.org>
<b>On Behalf Of </b>Wiegand, Robert E. (GSFC-5830) via SIS-CFDPV1<br>
<b>Sent:</b> Friday, October 6, 2023 5:09 PM<br>
<b>To:</b> sis-cfdpv1@mailman.ccsds.org<br>
<b>Subject:</b> [SIS-CFDPV1] CFDP unbounded transfers<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">Greetings,<br>
<br>
I have a comment/question regarding unbounded file transfers.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">CCSDS 727.0-B-5 says in Table 5-1: Fixed PDU Header Fields<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt">… All files of unbounded size shall be flagged ‘large’…<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt">If the sender can ensure the unbounded file being transferred will be of size < 4GB, why must the sender/receiver use FSS size 64 bits for all PDUs?<br>
<br>
Disadvantages:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3;text-autospace:none">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:ArialNarrow"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt">each FDU 32 bits larger;<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3;text-autospace:none">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:ArialNarrow"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt">NAK sequence nearly doubles in size;<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3;text-autospace:none">
<![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:ArialNarrow"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt">hardware/software built for 32 bit FSS cannot use unbounded file transfers<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt"><br>
I am not seeing advantages that cannot be addressed without this constraint.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:36.0pt;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt"><br>
Any thoughts or explanation?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt">thank you<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt">bob<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">--<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">Bob Wiegand<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">Ground Software Systems Branch<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt">NASA/GSFC Code 583<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
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