[Tostino]

It'll be interesting to see how things shake out when some of the other implementations using postgres's pluggable storage API start maturing. I wonder if it'll have some of the same operational downsides that mixing storage in MySQL has.

[evanelias]

Good question. I assume it depends on how Postgres handles multi-engine transactions, and how it stores replication state metadata. A good discussion of the issue in MySQL/MariaDB is here: https://kristiannielsen.livejournal.com/19223.html

Apparently MariaDB 10.3+ has this solution implemented, which is cool, never knew that before. I don't think there's anything equivalent in MySQL.