Dyn Webinar: DNS Disaster Recovery & Preparedness
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Transcript of Dyn Webinar: DNS Disaster Recovery & Preparedness
Preparing for DNS DisasterAugust 28, 2013
Cory von WallensteinCTO
@cvwdyn
Preparing for DNS Disaster @cvwdyn @dyninc
Cory von Wallenstein
Chief Technology
Officer
Dyn Inc.
@cvwdyn
Preparing for DNS Disaster @cvwdyn @dyninc
What do we mean by DNS disaster?$ dig company.com
; <<>> DiG 9.8.3-P1 <<>> company.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 1876
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;company.com. IN A
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
October 2012
Hurricane
Sandy
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
“A frying squirrel took out half of our Santa Clara data center two years back,”- Mike Christian, Yahoo
Preparing for DNS Disaster @cvwdyn @dyninc
“Squirrel chews account for a whopping 17% of our damages so far this year! But let me add that it is down from 28% just last year and it continues to decrease since we added cable guards to our plant.”, Fred Lawler, Level(3)
Preparing for DNS Disaster @cvwdyn @dyninc
Disasters can happen anywhere.Disasters can happen anytime.Disasters can happen to anyone.
Preparing for DNS Disaster @cvwdyn @dyninc
Users expect reliable & fast services.
No excuses.
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
What should you know about your data center before you
commit?
Preparing for DNS Disaster @cvwdyn @dyninc
“Wired people should know something about wires”- Neal Stephenson, quoted in Andrew Blum’s TED Talk What is the Internet, Really?
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Who carries your bits?Where are they carried?
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Speed of light299,792.458 km/second(in a vacuum)
Theoretical RTT~40ms
Real RTT~90ms
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Where will you deploy your second datacenter?
Preparing for DNS Disaster @cvwdyn @dyninc
Where will you deploy your second datacenter?
Preparing for DNS Disaster @cvwdyn @dyninc
What do you drill? How often?Can I watch?
Preparing for DNS Disaster @cvwdyn @dyninc
When disaster approaches, how can you use advanced services to
help avoid downtime?
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Preparing for DNS Disaster @cvwdyn @dyninc
Failover to a Status Page;; QUESTION SECTION:
;twitter.com. IN A
;; ANSWER SECTION:
twitter.com. 30 IN A 199.16.156.230
twitter.com. 30 IN A 199.16.156.198
twitter.com. 30 IN A 199.16.156.38
Preparing for DNS Disaster @cvwdyn @dyninc
Active Failover to a Status Page;; QUESTION SECTION:
;twitter.com. IN A
;; ANSWER SECTION:
twitter.com. 30 IN A 199.16.156.230
twitter.com. 30 IN A 199.16.156.198
twitter.com. 30 IN A 199.16.156.38
Monitor… actively change when down
Preparing for DNS Disaster @cvwdyn @dyninc
Active Failover to a Status PagePros:• Preserve the trust in brand, maintain communication
Cons:• Longer time to recovery• You’re still “down”
Preparing for DNS Disaster @cvwdyn @dyninc
Active/Passive…Primary/Backup…
Pros:• Shorter time to recovery
Cons:• Cross your fingers that it works when you need it• Drill, drill, drill. Test, test, test.
Preparing for DNS Disaster @cvwdyn @dyninc
Active/Active (Iovation)
Pros:• Highly available• Shift traffic as needed (maintenance)
Cons:• Architect for it• Two sites each operating at >50% capacity risks outage
Preparing for DNS Disaster @cvwdyn @dyninc
Ever Too Late?
Never!
Constant evaluation of the right tool in the toolbox
Will evolve as your business evolves
Accept responsibility and ownership, and make it better
Preparing for DNS Disaster @cvwdyn @dyninc
Cory von Wallenstein
Chief Technology
Officer
Dyn Inc.
@cvwdyn
Preparing for DNS Disaster @cvwdyn @dyninc
Thank You!
Next Webinar: Holiday Planning For DNS & EmailWednesday, September 25
For More Disaster Planning Content:Dyn.com/Content-Hub