Maintaining zones separately is a reliability defense-in-depth technique anyways. George William Herbert Sent from my iPhone On Dec 27, 2012, at 7:17 AM, Rich Lafferty <rich@lafferty.ca> wrote:
On 2012-12-27, at 3:17 AM, Stephane Bortzmeyer wrote:
tumblr.com is similar. But it has another issues: the two sets of name servers (UltraDNS and Dynect) serve two different zones, with different serial numbers (573 vs. 2012122891).
The Dynect nameservers are a new addition -- as of 11pm EST last night Tumblr only had UltraDNS:
Last night:
Record last updated on..: 2012-08-17.
Domain servers in listed order:
pdns3.ultradns.org pdns4.ultradns.org pdns2.ultradns.net pdns6.ultradns.co.uk pdns1.ultradns.net pdns5.ultradns.info
Today:
Record last updated on..: 2012-12-26.
Domain servers in listed order:
ns1.p03.dynect.net pdns2.ultradns.net ns3.p03.dynect.net pdns4.ultradns.org pdns6.ultradns.co.uk pdns3.ultradns.org ns2.p03.dynect.net ns4.p03.dynect.net
Still has the mismatched serial issue, but I suspect they're just maintaining the zones separately, it's not like they would've been able to set up Dynect as secondaries while UltraDNS was having issues anyhow.
-Rich
-- Rich Lafferty rich@lafferty.ca
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