https://docs.docker.com/build/cache/backends/
Cache storage backends | Docker Docs
Feb 21, 2026 - Cache backends let you manage your build cache externally. External cache is useful to create a shared cache that can help speed up inner loop and CI builds.
cache storage backendsdockerdocs
https://www.sphinx-doc.org/en/master/usage/advanced/websupport/storagebackends.html
Storage backends — Sphinx documentation
storage backendssphinxdocumentation
https://www.syncany.org/
Syncany - Secure file sync software for arbitrary storage backends
storage backendssecurefilesyncsoftware