S3
8 posts
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S3 replication pricing: CRR, SRR, RTC (2026)
S3 replication bills a PUT per object plus $0.020/GB between Regions, so objects under 262 KB cost more in requests than transfer. SRR, RTC and Batch priced.
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S3 request pricing: the 18 KB line (2026)
One S3 GET a month costs more than a month of S3 Standard storage for any object under 18 KiB. S3 request pricing by class, with the crossover table.
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S3 Intelligent-Tiering cost break-even (2026)
S3 Intelligent-Tiering monitoring costs $0.0025 per 1,000 objects a month, so under a 250 KB average object size it loses to plain S3 Standard.
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What S3 Glacier retrieval really costs (2026)
Restoring 10 TB from S3 Glacier Deep Archive costs $268, 2.2x a year of storage. S3 Glacier retrieval is three charges: per GB, per request, plus a copy.
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S3 incomplete multipart uploads cost (2026)
Incomplete S3 multipart uploads bill as storage with no expiry, and expiration rules never remove them. How to list them, and the one lifecycle rule that does.
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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.