[root@node1 ~]# ceph --admin-daemon /var/run/ceph/ceph-osd.21.asok config show | less

{

"name": "osd.21",
"cluster": "ceph",
"admin_socket": "/var/run/ceph/ceph-osd.21.asok",
"admin_socket_mode": "",
"auth_client_required": "cephx",
"auth_cluster_required": "cephx",
"auth_debug": "false",
"auth_mon_ticket_ttl": "43200.000000",
"auth_service_required": "cephx",
"auth_service_ticket_ttl": "3600.000000",
"auth_supported": "",
"bdev_aio": "true",
"bdev_aio_max_queue_depth": "1024",
"bdev_aio_poll_ms": "250",
"bdev_aio_reap_max": "16",
"bdev_async_discard": "false",
"bdev_block_size": "4096",
"bdev_debug_aio": "false",
"bdev_debug_aio_suicide_timeout": "60.000000",
"bdev_debug_inflight_ios": "false",
"bdev_enable_discard": "false",
"bdev_inject_crash": "0",
"bdev_inject_crash_flush_delay": "2",
"bdev_nvme_retry_count": "-1",
"bdev_nvme_unbind_from_kernel": "false",
"bluefs_alloc_size": "1048576",
"bluefs_allocator": "stupid",
"bluefs_buffered_io": "true",
"bluefs_compact_log_sync": "false",
"bluefs_log_compact_min_ratio": "5.000000",
"bluefs_log_compact_min_size": "16777216",
"bluefs_max_log_runway": "4194304",
"bluefs_max_prefetch": "1048576",
"bluefs_min_flush_size": "524288",
"bluefs_min_log_runway": "1048576",
"bluefs_preextend_wal_files": "false",
"bluefs_sync_write": "false",
"bluestore_2q_cache_kin_ratio": "0.500000",
"bluestore_2q_cache_kout_ratio": "0.500000",
"bluestore_allocator": "stupid",
"bluestore_bitmapallocator_blocks_per_zone": "1024",
"bluestore_bitmapallocator_span_size": "1024",
"bluestore_blobid_prealloc": "10240",
"bluestore_block_create": "true",
"bluestore_block_db_create": "false",
"bluestore_block_db_path": "",
"bluestore_block_db_size": "0",
"bluestore_block_path": "",
"bluestore_block_preallocate_file": "false",
"bluestore_block_size": "10737418240",
"bluestore_block_wal_create": "false",