S3
3 posts
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When a cheap S3 storage class costs more (2026)
Minimum durations, the 128 KB rounding rule and the 40 KB Glacier overhead billed partly at S3 Standard rate.
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VPC endpoint cost: gateway vs interface (2026)
VPC gateway endpoints for S3 and DynamoDB carry no charge. Three documented ways one silently stops covering your traffic.
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AWS KMS key pricing at scale (2026)
A rotated key costs $3 a month, not $1. And S3 Bucket Keys cut KMS request charges by up to 99% with no code change.