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Nick Marden

DNSSEC vs. Elastic Load Balancers: the Zone Apex Problem

This is the final post in the 5-part series, The Right Tools for the Job: Re-Hosting DigitalGov Search to a Dynamic Infrastructure Environment. Federal websites are required to implement DNSSEC, which relies on knowing exactly what server is responding to a request. In Amazon Web Services (AWS), the problem of unreliable servers is solved by Elastic Load Balancing (ELB). An ELB containing one or more servers is presented to the world as a single hostname — say, usasearch-elb.

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A Domain by Any Other Name: CNAMES, Wildcard Records and Another Level of Indirection

This is post 3 in the 5-part series The Right Tools for the Job: Re-Hosting DigitalGov Search to a Dynamic Infrastructure Environment. “All problems in computer science can be solved by another level of indirection, except of course for the problem of too many indirections.” – David Wheeler The simplest of our four requirements was to allow customers to choose whether to use the search.usa.gov domain for their search results page, or create a “masked” domain name such as search.

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Quality, Speed, and Lower Costs: Yes, You Can Have It All

This is post 2 in the 5-part series The Right Tools for the Job: Re-Hosting DigitalGov Search to a Dynamic Infrastructure Environment. The last major infrastructure upgrade that DigitalGov Search had was in 2010. Not only has technology evolved significantly since then, but so have business models for right-sizing costs. Moving to Amazon Web Services (AWS) infrastructure allowed us to improve reliability by creating self-healing servers and distributing the service across four physically isolated datacenters, and reduce datacenter costs by 40% per month — no longer do we have to pay for peak throughput capacity overnight, on weekends, or during other predictably low-traffic periods.

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