S3 lacks compare-and-swap (CAS) operations

7/10 High

S3 is the only major object store without compare-and-swap (CAS) operations, a feature available in GCS, Azure Blob Store, Cloudflare R2, Tigris, and MinIO. This forces developers to use separate transactional stores like DynamoDB, creating ugly abstractions and two-phase write complexity.

Amazon S3DynamoDBGoogle Cloud StorageAzure Blob Store
Category
compatibility
Workaround
hack
Freshness
persistent
Scope
framework
Upstream
wontfix
Recurring
Yes
Buyer Type
team
Maintainer
abandoned

Sources

Collection History

Query: “What are the most common pain points with S3 for developers in 2025?”4/5/2026

S3 is the only object store that doesn't support preconditions. Every other object store—Google Cloud Storage (GCS), Azure Blob Store (ABS), Cloudflare Ridiculously Reliable (R2) storage, Tigris, MinIO—all have this feature.

Created: 4/5/2026Updated: 4/5/2026