How much is power as a percent of data centre operating expense? What sort of a range do you see? We are building a high capacity cable to Iceland, which has already become a major aluminum smelting centre due to its cheap geothermal and hydro power, and we've already received inquiries for connectivity to Iceland for data centre opportunities. I assume that expense and ability to scale the power network are the key concerns of the IT community. And for governments, carbon emissions should matter. Roderick S. Beck Director of EMEA Sales Hibernia Atlantic 1, Passage du Chantier, 75012 Paris http://www.hiberniaatlantic.com Wireless: 1-212-444-8829. Landline: 33-1-4346-3209 AOL Messenger: GlobalBandwidth rod.beck@hiberniaatlantic.com rodbeck@erols.com ``Unthinking respect for authority is the greatest enemy of truth.'' Albert Einstein. -----Original Message----- From: owner-nanog@merit.edu on behalf of Valdis.Kletnieks@vt.edu Sent: Thu 8/16/2007 4:25 PM To: Tuc at T-B-O-H Cc: nanog@nanog.org Subject: Re: Do I or RR need dns clue? On Thu, 16 Aug 2007 10:40:49 EDT, Tuc at T-B-O-H said:
Mail to RR users is getting refused due to PTR issues. I contacted RR and explained that yea, one of our 2 DNS servers for the IN-ADDR.ARPA is down, but the other is fine. They said that I should either get the DNS server back up (Which of course is already being worked on, was the minute it went down) or delete it from ARIN IN-ADDR.ARPA records.
Isn't the whole point of multiple DNS servers that if one is down the other can still answer queries? Or am I missing something here???
Depends exactly what your "down" server is doing. If it's totally not answering, the resolver at RR should silently fall back and try the other one. It gets more interesting if your "down" server is still answering queries, particlylarly if it's giving out "I never heard of it" answers with the authoritative bit set because it's blown out a zone. In that case, the RR resolver is within its rights to assume that your NS knows what it's talking about and believing it. This e-mail and any attachments thereto is intended only for use by the addressee(s) named herein and may be proprietary and/or legally privileged. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this email, and any attachments thereto, without the prior written permission of the sender is strictly prohibited. If you receive this e-mail in error, please immediately telephone or e-mail the sender and permanently delete the original copy and any copy of this e-mail, and any printout thereof. All documents, contracts or agreements referred or attached to this e-mail are SUBJECT TO CONTRACT. The contents of an attachment to this e-mail may contain software viruses that could damage your own computer system. While Hibernia Atlantic has taken every reasonable precaution to minimize this risk, we cannot accept liability for any damage that you sustain as a result of software viruses. You should carry out your own virus checks before opening any attachment