[ceph-users] BlueStore checksums all data written to disk! so, can we use two copies in the production?

"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

[ceph-users] osd is stuck in "bluestore(/var/lib/ceph/osd/ceph-3) _open_alloc loaded 599 G in 1055 extents" when it starts

# tail -f /var/log/ceph/ceph-osd.3.log ... 2018-10-02 03:49:48.552686 7ffa10b6bd00 1 bluestore(/var/lib/ceph/osd/ceph-3) _open_db opened rocksdb path db options compression=kNoCompression,max_write_buffer_number=4,min_write_buffer_number_to _merge=1,recycle_log_file_num=4,write_buffer_size=26843