On 20-04-15 06:27, Zygo Blaxell wrote: >> I'm curious as to whether +C has any effect on BTRFS's durability, too. > > I would expect it to be strictly equal to or worse than the CoW > durability.
In addition to the stuff pointed out, I've wondered about this: PostgreSQL full_page_writes copies 8k pages in order to prevent corruption from partial writes. But btrfs has 16k pages by default, so a corrupted FS page would corrupt more data than PostgreSQL protects. Maybe it's not an issue if the underlying HW has 512b/4k sectors, or maybe I'm misunderstanding what the respective features assume, but unless informed to the contrary I wouldn't be entirely comfortable with this. (With CoW enabled, you don't have partial writes, so the point is moot) -- GCP -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
