[zerebubuth]

Ceph's filesystem interface is built on a lower level protocol which is available through the librados [1] API, which might be a possible solution if it builds for (or can be ported to) Cygwin / Windows and all you need is a client on Windows.

This API is more S3-like, operating directly on "objects" in the Ceph cluster. I wrote a system for storing many small (10-20kB) files using librados & Ceph, but the performance wasn't as good as I had hoped. Possibly I did not configure the Ceph cluster in the optimal manner - the cluster setup is quite complex.

[1] http://ceph.com/docs/master/rados/api/librados-intro/