Ravi Sir's Cards › AWS
Why skip keys under thumbs/?
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
Writing the thumb into a watched prefix would invoke Lambda again (recursion).
Why it matters
Bills and throttles explode until you delete the notification.
How / example
Listen on uploads/ only, or if key.startswith("thumbs/"): return before resize.