s3cas

s3cas is an S3-compatible API server that uses content-addressed storage for efficient and reliable data management.

Running s3cas

s3cas server --access-key=MY_KEY --secret-key=MY_SECRET --fs-root=/tmp/s3/fs --meta-root=/tmp/s3/meta

Objects smaller than or equal to a configurable threshold can be stored directly in their metadata records, improving performance for small objects.

Configure this feature using the command-line option:

--inline-metadata-size <size>    # omit to disable inlining

If the size of object data + metadata is smaller than or equal to the threshold, the object data is stored in the metadata; otherwise, standard block storage is used.
Setting size to 0 or omitting the option disables inlining completely.
Objects uploaded using the multipart method will never be inlined because they are assumed to be large objects.

The refcount feature adds reference counting to data blocks.

For project overview and build instructions, see the main README.