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Interview Question : Avoid Database Failures ?

 
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I was asked question in Interview as follows

How would you avoid/prevent when DB(say ORACLE) is down?

I don't know how to answer this question and what precisely she wanted to listen to an Answer.


I just said using multiple nodes/ distributed database will ensure availability. He seems not so happy with the answer. I cannot think beyond Replication of DB and Redundancy as Solution.

Suggestions.
 
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Maybe she was looking for retry logic? Or a filter that tells users that the app is unavailable? Or monitoring?

I think the answer to this could be many things.
 
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