Here are some slides from a presentation of Andres Freud on the matter: https://anarazel.de/talks/2018-10-25-pgconfeu-pluggable-storage/pluggable.pdf https://an

Here are some slides from a presentation of Andres Freud on the matter: https://anarazel.de/talks/2018-10-25-pgconfeu-pluggable-storage/pluggable.pdf https://anarazel.de/talks/2018-10-25-pgconfeu-pluggable-stor... Slides 4 and 5 give some insight about the architecture changes which have been done.