Swift by its very nature is eventually consistent. I don't believe there is anyway to change this through options. Additionally, due to its very nature I am not sure you will be able to change the current Swift code to do this with any ease. Perhaps someone will come along and correct me on this.

I would recommend looking into an alternative backend for storing data such as ceph which is strongly consistent. https://github.com/stackforge/swift-c... is for achieving that goal. In this case you would have a ceph cluster and swift-proxies which write and read objects into that cluster.