Ravi Sir's Cards › AWS
What causes a hot partition?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
What it is
Too many reads/writes on one partition key value.
Why it matters
Low-cardinality keys (e.g. status=ACTIVE) concentrate load.
How / example
Use high-cardinality keys; shard write-heavy keys if needed.