ZeroFS vs. Amazon S3 Files
This article compares the technical architectures of Amazon S3 Files and ZeroFS, both of which provide POSIX filesystem interfaces for object storage. It highlights how S3 Files maintains a one-to-one mapping with S3 objects, while ZeroFS uses a more complex internal structure with compression and encryption.
Why it matters
Understanding these architectural differences is critical for engineers choosing storage backends for high-performance or secure data applications.
Amazon S3 Files and ZeroFS expose POSIX filesystems backed by object storage, but the shared interface hides opposite bucket layouts. The choice turns on the role of the bucket: if files must remain ordinary S3 objects, S3 Files preserves that identity; if the bucket can be an internal persistence layer, ZeroFS trades direct S3 access for packing, compression, and client-side encryption.
The defining property of S3 Files, which is built using Amazon EFS , is that images/cat.jpg on the mount corresponds to the same key in the bucket, with changes flowing in both directions. Active data and metadata reside in a low-latency tier that AWS calls “high-performance storage.”
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