root@mgr01# ceph osd dump | grep '^pool.* erasure'
pool 23 'cephfs.data' erasure size 7 min_size 3 crush_rule 2 object_hash rjenkins pg_num 1024 pgp_num 1024 last_change 196579 lfor 196566/196566 flags hashpspool,ec_overwrites,selfmanaged_snaps max_bytes 50000000000000 tiers 25 read_tier 25 write_tier 25 stripe_width 8192 application cephfs

root@mgr01#  ceph osd erasure-code-profile get cephfs
crush-device-class=hdd
crush-failure-domain=host
crush-root=hdd
jerasure-per-chunk-alignment=false
k=5
m=2
plugin=jerasure
technique=reed_sol_van
w=8