Transition : DC to CLOUD
Test Cloud Efficiency
There are Chaos Monkey (which simulates instance failures) and Chaos Gorilla (which simulate AWS Region Failures).
Extensive Backup Strategy
As shown on the left side, the whole infra setup is redundant across multiple AZ. On the right side the production data availability is shown in 3 different levels.
1st Level – Each data element is stored redundant database to protect against hardware failure.
2nd Level – To protect from logical failure like software bugs, someone drops a column accidently etc the need occurs to take regular backup of data onto s3.
3rd Level – To protect against natural disasters, catastrophic security breaches there is a secondary backup of all customer data into a hetrogenous cloud environment.