As for the rest of MirageOS, Irmin is a "library" database, means that you have a bunch of components than you can re-use in different contexts. Two interesting contexts are:
- the kernel, where some components of Irmin can be compiled into a unikernel and be run on top of Xen/baremetal, bypassing the OS completely. Irmin-ARP (http://somerandomidiot.com/blog/2015/04/24/what-a-distribute...) is an interesting step is the direction of exposing kernel data and do interesting stuff with it.
- the browser, where some components of Irmin are transpiled to JavaScript using js_of_ocaml (http://ocsigen.org/js_of_ocaml/). Cuekeeper (http://roscidus.com/blog/blog/2015/04/28/cuekeeper-gitting-t...) is an interesting use-case for that.
- the kernel, where some components of Irmin can be compiled into a unikernel and be run on top of Xen/baremetal, bypassing the OS completely. Irmin-ARP (http://somerandomidiot.com/blog/2015/04/24/what-a-distribute...) is an interesting step is the direction of exposing kernel data and do interesting stuff with it.