Hi,
> On the other side of the coin, I have little confidence in DRBD
> providing the storage semantics we need (in particular guaranteeing
> write ordering). So that path doesn't sound exactly risk-free either.
DRBD seems to enforce strict write ordering on both sides of the link
according to the docs. I didn't look at the code, but my plug-pulling tests
on a busy PostgreSQL server didn't cause any problems. No conclusive
evidence, but useful at lease in my use-case. (And yes: I make ps_dumps
often just in case)
- Sander