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Sorry, second question should obviously have been
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<p class="MsoListParagraph" style="text-indent: -18pt;"><span lang="EN-GB">2)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: "Times New Roman";"> </span></span><span lang="EN-GB">Do you use deduplication for SELECTIVE
harvests?</span></p>
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<div>/Peter</div>
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<blockquote type="cite">13 jan. 2020 kl. 17:31 skrev Peter Svanberg <Peter.Svanberg@kb.se>:<br>
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<p class="MsoNormal"><span lang="EN-GB">Hello!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I’m trying to understand how NAS and Heritrix handles deduplication, which lead to an internal discussion about the overall pros and cons of ditto. I then found Kristinn Sigurðsson’s interesting web archiving blog articles.
He has written about de- and reduplication: </span><a href="https://kris-sigur.blogspot.com/2015/01/the-downside-of-web-archive.html"><span lang="EN-GB">https://kris-sigur.blogspot.com/2015/01/the-downside-of-web-archive.html</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Some short questions about the deduplication in NAS (is.hi.bok.deduplicator.DeDuplicator) that I would appreciate quick answers on (from all NAS user sites):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-GB"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-GB">Do you use deduplication for snapshot harvests (broad crawls)?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-GB"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-GB">Do you use deduplication for snapshot harvests?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-GB"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-GB">Which matching method do you use – DIGEST or URL?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-GB"><span style="mso-list:Ignore">4)<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-GB">Do you “restart” the deduplication at intervals? How long intervals?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">By (4) I mean you do a harvest with no deduplication, limiting the number of dependencies between WARC files. (Somewhat like total and incremental backups.) Maybe you just do deduplication between the 2–3 steps in a
broad crawl? Or between the last X broad crawls?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Regards, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:SV">-----<br>
<br>
</span><span lang="EN-GB" style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:SV">Peter Svanberg</span><span lang="EN-GB" style="mso-fareast-language:SV"><br>
</span><span lang="EN-GB" style="font-size:9.0pt;mso-fareast-language:SV"><br>
</span><span lang="EN-GB" style="font-family:"Arial",sans-serif;mso-fareast-language:SV">National Library of Sweden</span><span lang="EN-GB" style="mso-fareast-language:SV"><br>
</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:SV">Phone: +46 10 709
<span style="color:black">32 78</span></span><span lang="EN-GB" style="font-size:9.0pt;mso-fareast-language:SV"><br>
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</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:SV">E-mail</span><span lang="EN-GB" style="font-size:9.0pt;mso-fareast-language:SV">:
</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:SV">peter.svanberg@kb.se</span><span lang="EN-GB" style="font-size:9.0pt;color:black;mso-fareast-language:SV"><br>
</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:SV">Web</span><span lang="EN-GB" style="font-size:9.0pt;mso-fareast-language:SV">:
</span><span lang="EN-GB" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:SV">www.kb.se</span><span lang="EN-GB" style="font-size:9.0pt;mso-fareast-language:SV"><br>
<br>
</span><span lang="EN-GB" style="mso-fareast-language:SV"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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