Don’t use Ceph with SMR Drives! A while back at Ceph Day in NYC I saw a representative from a drive manufacturer talk about SMR drives. SMR stands for Shingled Magnetic Recordingand the analogy given was ‘think about the shingles on a house’. It sounded very interesting but they were not on the market at the time. A very active community member, Wido den Hollander, posted his findings here. The net result was DO NOT USE SMR DRIVES!
"There is no compression algorithm for experience" -- Andy Jassy (AWS)