Amazon S3 (Standard) SLAAWS · Storage · AWS · Storage
Promise vs reality
Downtime used against the allowance
3 d of major incidents, 8.2x the allowance8.8 h allowed in 365 days
3 major and 1 minor incidents; worst region me-central-1. 0 min degraded (not counted).
Major incident minutes per month
Allowed per month: 44 min
- Promised
- 99.9%
- Observed, 365d
- 99.178%
- Major incident time
- 3 d
- Credit on first breach
- 10%
Commitments and credits
- S3 Standard (also Express One Zone, Glacier Flexible Retrieval, Glacier Deep Archive)Requests to S3 Standard and other classes not listed separately99.9%
Monthly uptime below, credit of the bill
- Below 99.9%10%
- Below 99%25%
- Below 95%100%
- S3 Intelligent-Tiering, Standard-IA, One Zone-IA, Glacier Instant RetrievalRequests to the infrequent-access storage classes99%
Monthly uptime below, credit of the bill
- Below 99%10%
- Below 98%25%
- Below 95%100%
Terms
- Measured
- Monthly Uptime Percentage = 100% minus the average of 5-minute Error Rates (InternalError / ServiceUnavailable) in the billing cycle, per storage class per region
- Credit cap
- Up to 100% of charges for the affected storage class in the region at the lowest tier; applied against future S3 payments; issued only if over $1
- Claim window
- By the end of the second billing cycle after which the incident occurred
- How to claim
- Open a case in the AWS Support Center with 'SLA Credit Request' in the subject line and request logs
Not covered
- Factors outside AWS's reasonable control (force majeure, Internet problems beyond the S3 demarcation point)
- Customer actions or inactions
- Customer equipment, software or other technology
- AWS suspension or termination of the right to use S3
For requests to S3 Standard, S3 Express One Zone, S3 Glacier Flexible Retrieval, S3 Glacier Deep Archive, and all other requests not specified below: ... Less than 99.9% but greater than or equal to 99.0% 10%
The page states the commitment only through the credit table (no standalone 'at least X%' sentence); the uptime value is the top threshold of the credit table. Credits for S3 Express One Zone are per Availability Zone.
Evidence: incidents, last 365 days
SLA changes
- Mar20Amazon S3 (Standard)S3 Standard credit schedule gained a 100% tier below 95.0% (and a 25% band 95.0-99.0%). April 4, 2018 version: 99.0-99.9% = 10%, less than 99.0% = 25%. March 20, 2019 version: 10% / 25% / 100%. Standard-IA got the same 100% tier below 95%. The 99.9% threshold did not change.Source
Other storage SLAs
ServiceDowntime vs allowed
Volumes Block StorageDigitalOcean99.99% / 100%
Azure Blob Storage (Storage Accounts)Microsoft Azure99.99% / n/a
Cloud StorageGoogle Cloud99.95% / 99.927%
Amazon S3 (Standard)AWS99.9% / 99.178%
Cloudflare R2Cloudflare99.9% / 100%
OCI Object StorageOracle Cloud Infrastructure99.9% / n/a
Promised in the SLAObserved on the vendor's status pagePartial historyShortfall
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