Ravi Sir's Cards › AWS
TTL, Streams and backups
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
Why do we need it?
Old sessions and change feeds need automation, not cron on EC2.
What is it?
TTL expires items by epoch seconds. Streams feed Lambda on changes. PITR backups.
How to do it
Enable TTL on attribute expiresAt; enable Streams → new Lambda.
expiresAt
Example
Magic-link tokens vanish after 15 minutes via TTL.