Google has a paper on their system, Zanzibar: https://research.google/pubs/pub48190/ https://research.google/pubs/pub48190/ Doubt it will answer all your quest

Google has a paper on their system, Zanzibar: https://research.google/pubs/pub48190/ https://research.google/pubs/pub48190/ Doubt it will answer all your questions but I found it interesting.