Short answer: no and no.
Long:
1. having size = 2 is safe *if you also keep min_size at 2*. But
that's not highly available so you usually don't want this. min_size =
1 (or reducing min size on an ec pool) is basically a guarantee to
lose at least some data/writes in the long run.
2. It's no lon
"when using BlueStore, Ceph can ensure data integrity by conducting a cyclical
redundancy check (CRC) on write operations; then, store the CRC value in the
block database. On read operations, Ceph can retrieve the CRC value from the
block database and compare it with the generated CRC of the ret
