● Defaults
● File
● S3
● Other
● Azure
● Google Cloud Storage
● Openstack's Swift and Glance
● OSS
● Elliptics
https://github.com/docker/docker-registry/blob/master/README.md#storage-options
Elliptics Storage
● Key-value.● DHT by default.● Secondary indexes.● Built-in SLRU caching.
https://github.com/reverbrain/elliptics