Environment
Need separate environments for Development, Testing, and Production.
Development & Testing will have some % of sample data from Production.
Testing and Production will have a similar HW environment. (Cloud / In house)
Nice to have a similar environment for development.
Track changes, indexes, and query changes are done in the lower environment.
DR environment is part of the Production release.
Suppose it's in-house; deploy it in different data centers. If it's cloud, deploy it in different regions.
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