What's the Difference Between Amazon FSx and Amazon S3?
Compare Amazon FSx and Amazon S3 side by side — features, pricing, and ideal use cases to help you choose the right product.
Compare side-by-side
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Comparisons
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Amazon FSx
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Amazon S3
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Category
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Storage, File Storage |
Storage, Object Storage |
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Description
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Fully managed file storage built on popular file systems — Windows File Server, Lustre, NetApp ONTAP, and OpenZFS. |
Virtually unlimited secure object storage for AI, analytics, and archives |
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Best for
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Key features
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Pricing model
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Pay per GB provisioned + throughput |
Pay per GB stored + requests + data transfer |
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Free tier
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No |
Yes |
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Expert take
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“FSx for Lustre delivers hundreds of GB/s throughput for HPC and ML training workloads. FSx for Windows is the right choice when workloads need SMB protocol and Active Directory integration. Pick the file system type that matches your protocol and performance needs.” |
“S3 delivers eleven 9s of durability and scales without limits. It serves as the foundation for data lakes, backup pipelines, and ML training data because you can store anything at any scale and access it from anywhere with fine-grained permissions.” |
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Product page
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When to use Amazon FSx or Amazon S3
Use Amazon FSx when:
- Windows file shares
- HPC workloads
- Machine learning
- EDA
- Media processing
Use Amazon S3 when:
- Data lakes
- Backup & restore
- Static website hosting
- Archive
- Big data analytics
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