Professional Development
Amazon Web Services: High Availability
A course on applying high-availability principles in Amazon Web Services, with emphasis on designing resilient environments rather than assuming individual cloud components cannot fail.
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Context
Why I took this course
By 2018 I had already spent years operating business-critical infrastructure and dealing with redundancy, failover, monitoring, backups, load balancing and real outages. I was expanding that operational experience into AWS, and this course helped map familiar high-availability principles to AWS-specific architecture and services.
Takeaways
What I took away from it
- High availability starts with designing for component failure rather than treating infrastructure as permanently healthy.
- DNS, compute, storage and database layers all need appropriate redundancy; eliminating one single point of failure does not make an application highly available.
- Cloud services change the implementation details, but the operational principles remain familiar: health checks, failover, monitoring, recovery and tested redundancy.
Experience
How it connects to my work
I have operated environments where availability depended on multiple ISPs, redundant power, RAID storage, off-site backups, load-balanced application servers, synchronized data and active monitoring.
In AWS-based client work, I have designed and supported cloud infrastructure where load balancing, resilient data services and regional architecture were part of the overall reliability strategy.