Hi,
> Now to our problem. We want to be sure that a write is replicated before we
> get a ack.
That should be the case AFAIU.
There was however a bug that was recently fixed that make RBD ack too early.
> one osd can lead to data loss with min_size set to 1.
It definitely shouldn't. Unless of course the only remaining OSD fails as well.
> The problem now is that if one osd goes down some pg's will end up
> incomplete, and no io operations will be allowed to the rbd.
Well yeah, that's exactly the semantic of the min_size option ...
Cheers,
Sylvain
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