Following up on my last post on this topic (since there seemed to be at least some interest): after evaluating the setup for a few weeks, I have decided that this is not as good a solution as I had hoped.
In particular, the expected benefits of splitting data between a special vdev backed by a bucket with small object size and a normal vdev backed by a bucket with much larger object size did not materialize.
--
GPG Fingerprint: ED31 791B 2C5C 1613 AF38 8B8A D113 FCAC 3C4E 599F
»Time flies like an arrow, fruit flies like a Banana.«