I am looking for open source software that can be used for expose a file system tree as a service with an S3 (subset) compatible API.
I need something that allows software (i.e. GenomeSpace which has has S3 client capability) to remotely read and write files from the file system of my server as if my server was a full-blown S3 server.
Redundancy, etcetera is not a requirement. This is not full-function Object Storage: it is simply making files and directories look like object storage to an S3 client running on another machine (probably in the same data centre).
I should have mentioned that my server will run some flavour of Linux.