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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">Hi Junxiao,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">thanks for the answers and the link. I have a follow-up question:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">What then happens when the (same as below) Interest<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"> /nytimes/frontpage | CanBePrefix=true | MustBeFresh=true<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">arrives at a cache with the sole content<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">
</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">/nytimes/frontpage/addBanner/v23 | 60'000ms<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">According to prefix matching and a positive freshnessPeriod, will I receive the addBanner only and never the complete front page?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US">Urs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="DE">Von:</span></b><span lang="DE"> Junxiao Shi <shijunxiao@email.arizona.edu>
<br>
<b>Gesendet:</b> Donnerstag, 3. Mai 2018 23:37<br>
<b>An:</b> Urs Schnurrenberger <urs.schnurrenberger@unibas.ch><br>
<b>Cc:</b> ndn-interest@lists.cs.ucla.edu<br>
<b>Betreff:</b> Re: [Ndn-interest] Freshness & Latest Content<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-US">Hi Urs<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">I have some conceptual questions about freshness and how to ask for latest content.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Imagine 2 properly versioned versions of /nytimes/frontpage (properly in the sense of
</span><span style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">“<span lang="EN-US">larger</span>”<span lang="EN-US"> version =
</span>“<span lang="EN-US">newer</span>”<span lang="EN-US"> version, according to [1]):</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">format : contentName | freshnessPeriod</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:35.4pt">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">/nytimes/frontpage/v100 | 100ms [stored at cache X somewhere between requester and producer]</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:35.4pt">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">/nytimes/frontpage/v105 | 300ms [stored at producer]</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">I assume that if a user does only know about the contentName (prefix), but not about the latest
versionNumber, he/she asks for</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-indent:35.4pt">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Interest: /nytimes/frontpage | CanBePrefix=true | MustBeFresh=true</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Yes, that's what consumer should ask for.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Question 1:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Is it correct that this Interest is satisfied by cache X because there is a prefix match on the
contentName and a freshnessPeriod > 0?</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Yes, X will return /nytimes/frontpage/v100 until it becomes non-fresh.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Question 2:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Assuming the answer to Q1 is
</span><span style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">‘<span lang="EN-US">yes</span>’<span lang="EN-US"> and that the reuqester does NOT know the latest versionNumber, is there really no possibility for the requester to get the globally
latest version v105 directly from the producer?</span></span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">It is possible but requires changes on producer. See </span><a href="https://redmine.named-data.net/issues/4396#note-1" target="_blank"><span lang="EN-US">https://redmine.named-data.net/issues/4396#note-1</span></a><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Question 3:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Malgun Gothic",sans-serif">Assuming that the requester KNOWS the latest versionNumber (from some miraculous oracle), I guess
she/he can simply ask for (/nytimes/frontpage/v105 | CanBePrefix=false | MustBeFresh=true). Correct?</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Yes, the Interest should have version number if the consumer knows it. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">Yours, Junxiao <o:p></o:p></p>
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