Download pptx - Dyn Webinar: DNS Disaster Recovery & Preparedness

Preparing for DNS DisasterAugust 28, 2013

Cory von WallensteinCTO

@cvwdyn

http://www.linkedin.com/company/dyn

http://www.facebook.com/Dyn

http://twitter.com/dyninc

http://www.youtube.com/dyninc

Preparing for DNS Disaster @cvwdyn @dyninc

Cory von Wallenstein

Chief Technology

Officer

Dyn Inc.

[email protected]

@cvwdyn






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











October 2012

Hurricane

Sandy
























































“A frying squirrel took out half of our Santa Clara data center two years back,”- Mike Christian, Yahoo






“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)






Disasters can happen anywhere.Disasters can happen anytime.Disasters can happen to anyone.






Users expect reliable & fast services.

No excuses.











What should you know about your data center before you

commit?






“Wired people should know something about wires”- Neal Stephenson, quoted in Andrew Blum’s TED Talk What is the Internet, Really?




































Who carries your bits?Where are they carried?











Speed of light299,792.458 km/second(in a vacuum)

Theoretical RTT~40ms

Real RTT~90ms











Where will you deploy your second datacenter?






Where will you deploy your second datacenter?






What do you drill? How often?Can I watch?






When disaster approaches, how can you use advanced services to

help avoid downtime?
















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






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






Active Failover to a Status PagePros:• Preserve the trust in brand, maintain communication

Cons:• Longer time to recovery• You’re still “down”






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.






Active/Active (Iovation)

Pros:• Highly available• Shift traffic as needed (maintenance)

Cons:• Architect for it• Two sites each operating at >50% capacity risks outage






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






Cory von Wallenstein

Chief Technology

Officer

Dyn Inc.

[email protected]

@cvwdyn






Thank You!

Next Webinar: Holiday Planning For DNS & EmailWednesday, September 25

For More Disaster Planning Content:Dyn.com/Content-Hub



