<div><br><div class="gmail_quote"><div dir="auto">On Sun, Jul 9, 2017 at 1:59 PM John W. Blue <<a href="mailto:john.blue@rrcic.com">john.blue@rrcic.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="color:#1f497d">Abdulhadi,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">Honestly, I think that a design spec of getting DNS responses in 3ms across the board is unrealistic. My initial MX query for <a href="http://litc.ly" target="_blank">litc.ly</a> took 367ms:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> </span></p></div></div></blockquote><div dir="auto"><br></div><div dir="auto">Like many poorly written / articulated SLAs, the devil is in the details.</div><div dir="auto"><br></div><div dir="auto">I could happily read this as the server / service must respond within 3ms. The OP mentioned VIP, so this could be for auth DNS, in which case responding to a query within 3ms is trivial...</div><div dir="auto"><br></div><div dir="auto">W</div><div dir="auto"><br></div><div dir="auto"><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="#0563C1" vlink="#954F72"><div class="m_-795788772815825915WordSection1"><p class="MsoNormal"><span style="color:#1f497d"><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">;; ADDITIONAL SECTION:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><a href="http://exmail.litc.ly" target="_blank">exmail.litc.ly</a>. 14400 IN A 197.215.159.227<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><a href="http://dns2.lttnet.net" target="_blank">dns2.lttnet.net</a>. 21600 IN A 62.240.36.40<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><a href="http://dns3.lttnet.net" target="_blank">dns3.lttnet.net</a>. 21600 IN A 62.240.36.40<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">;; Query time: 367 msec<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">;; SERVER: 127.0.0.1#53(127.0.0.1)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">;; WHEN: Sun Jul 9 12:50:58 2017<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">;; MSG SIZE rcvd: 144<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">Additionally, given the operational environment in which you exist I would recommend that you strive for just providing good DNS services in general.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">Good luck.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d">John<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b>From:</b> bind-users [mailto:<a href="mailto:bind-users-bounces@lists.isc.org" target="_blank">bind-users-bounces@lists.isc.org</a>]
<b>On Behalf Of </b>Abdulhadi Ettwejiri<br>
<b>Sent:</b> Sunday, July 09, 2017 2:32 AM<br>
<b>To:</b> <a href="mailto:bind-users@lists.isc.org" target="_blank">bind-users@lists.isc.org</a><br>
<b>Subject:</b> designing the DNS from the scratch<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#2f5496">HI,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#2f5496"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#2f5496">we are ISP company , we are providing Internet to our customer, Recently one of our VIP customer ask for DNS service, and need the response time 3msec, we don't have enough knowledge of DNS,
<u></u><u></u></span></p>
<h3 style="margin:0in;margin-bottom:.0001pt;background:white"><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#2f5496;font-weight:normal"><u></u> <u></u></span></h3>
<h3 style="margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt;background:white">
<u></u><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#2f5496;font-weight:normal"><span>1-<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#2f5496;font-weight:normal">To achieve the goal of my customer about the response time I need to know what’s the optimal design solution for DNS ( Authoritative
or Recursive</span><span></span><span></span><span lang="AR-SA" style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#2f5496;font-weight:normal"><span></span><span></span>(</span><span></span><span></span><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#2f5496;font-weight:normal"><span></span><span></span>,or
there is other design.</span><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:#2f5496;font-weight:normal"><u></u><u></u></span></h3>
<p class="m_-795788772815825915MsoListParagraph"><u></u><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#2f5496"><span>2-<span style="font:7.0pt "Times New Roman"">
</span></span></span><u></u><span style="font-size:12.0pt;color:#2f5496">If the answer in the previous question an “authoritative”, is there any registration & technical requirements for so (i.e. ccTLD, … )</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#2f5496"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="AR-SA" style="font-family:"Times New Roman",serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal" style="background:white"><i><span style="font-size:14.0pt;font-family:"Times New Roman",serif;color:#1f497d">Best regards</span></i><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><i><span style="font-size:14.0pt;font-family:"Times New Roman",serif;color:#1f497d">Abdulhadi Ettwejiri<u></u><u></u></span></i></p>
<p class="MsoNormal"><i><span style="font-family:"Times New Roman",serif;color:#1f497d">Technical Support Department<u></u><u></u></span></i></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;color:#215868"><img width="378" height="65" id="m_-795788772815825915Picture_x0020_1" src="cid:image001.jpg@01D2F8B2.CF6BC7A0" alt="Description: LITC-Logo03"></span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:8.0pt;color:#215868">Zawia Street inside GPTC building | Tripoli | Libya |
</span></b><u></u><u></u></p>
<p class="MsoNormal" align="right" style="text-align:left;background:white;direction:rtl;unicode-bidi:embed">
<b><span lang="EN-GB" style="font-size:8.0pt;font-family:Wingdings;color:#215868">)</span></b><b><span lang="EN-GB" style="font-size:8.0pt;color:#215868"> + 218 91 9994265
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</span></b><u><span style="font-size:8.0pt;color:#215868"><a href="mailto:Abdulhadi.ettwejiri@litc.ly" target="_blank">Abdulhadi.ettwejiri@litc.ly</a></span></u><b><u><span style="color:#215868"><br>
</span></u></b><b><span lang="EN-GB" style="font-size:8.0pt;font-family:Wingdings;color:#215868">(</span></b><b><span lang="EN-GB" style="font-size:8.0pt;color:#215868"> + 218 21 3600234
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</span></b><span style="font-family:"Times New Roman",serif"><a href="http://www.litc.ly/" target="_blank"><b><span lang="EN-GB" style="font-size:8.0pt;font-family:"Calibri",sans-serif;color:#215868">http://www.litc.ly</span></b></a></span><span><u></u><u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:8.0pt;font-family:"Wingdings 2";color:#215868">7</span></b><b><span lang="EN-GB" style="font-size:8.0pt;color:#215868"> + 218 21 3617777</span></b><span style="font-family:"Times New Roman",serif"><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<a href="https://lists.isc.org/mailman/listinfo/bind-users" rel="noreferrer" target="_blank">https://lists.isc.org/mailman/listinfo/bind-users</a></blockquote></div></div><div dir="ltr">-- <br></div><div class="gmail_signature" data-smartmail="gmail_signature">I don't think the execution is relevant when it was obviously a bad idea in the first place.<br>This is like putting rabid weasels in your pants, and later expressing regret at having chosen those particular rabid weasels and that pair of pants.<br> ---maf</div>