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Showing posts with the label AwS certified

High Availability vs Fault Tolerance vs Disaster Recovery

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These are some of the key pillars of  AWS Well-Architected Framework   I think the Terms, are slightly misunderstood when designing an architecture. And can easily be confused with one another. Let us start with High Availability. Whenever we hear the term High Availability we tend to think, an architecture that is highly available, scalable and cannot fail. Well, the first two points might be right, but last part "Fail"  is where we need pay bit more attention. Lets see the difference. A High Availability: Architecture is actually prone to failures. What the term "High Availability" implies is an Architecture that intends to provide a maximum uptime. Meaning, in cases of failure, the ability of the system to recover as quickly as possible.  You could hear terms like 99.9% fail proof, 99.999% (five 9's) fail proof etc.  But that still means, for a 99.9% there is still a protentional of 8.77 hours per year of downtime possible  and for 99.999% there is still a p

Area 53

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  Yes! Area 53, we're finally going there. Super secret projects facility located in the middle of nowhere Nevada Desert, its an area also known as Groom Lake. It has facilities built inside the mountains to hide the alien technologies. It is so top secret that even the president of united states does not have the level of security clearance to access the site. It's what's called, above top secret and it is classified as a black project. "For eyes only". You cannot go within 10 miles of its perimeter without putting yourself at the risk of getting shot.  A site managed by the private military contractors and it is so elusive that no one has any idea what goes on inside.  The whole facility is so compartmentalized and distributed in nature that even the people who work there are delegated only a small section of the work so one worker doesn't know what the other one is working on, even though they might be working on the same technology. There are NDA's in