- At present, from a shared BlueStore OSD which has wal, db and block all in one it is being set as 64K we can see in the following log line.
2019-08-22 15:46:42.089735 7f993e198d80 20 bluefs _init_alloc id 1 alloc_size 0x10000 size 0xba4d800000
- OSD metadata:
# ceph osd metadata osd.0
{
"id": 0,
"arch": "x86_64",
"back_addr": "192.168.96.24:6804/348054",
"back_iface": "p7p2",
"bluefs": "1",
"bluefs_db_access_mode": "blk",
"bluefs_db_block_size": "4096",
"bluefs_db_dev": "253:2",
"bluefs_db_dev_node": "dm-2",
"bluefs_db_driver": "KernelDevice",
"bluefs_db_model": "",
"bluefs_db_partition_path": "/dev/dm-2",
"bluefs_db_rotational": "0",
"bluefs_db_size": "800164151296",
"bluefs_db_type": "ssd",
"bluefs_single_shared_device": "1",
"bluestore_bdev_access_mode": "blk",
"bluestore_bdev_block_size": "4096",
"bluestore_bdev_dev": "253:2",
"bluestore_bdev_dev_node": "dm-2",
"bluestore_bdev_driver": "KernelDevice",
"bluestore_bdev_model": "",
"bluestore_bdev_partition_path": "/dev/dm-2",
"bluestore_bdev_rotational": "0",
"bluestore_bdev_size": "800164151296",
"bluestore_bdev_type": "ssd",
"ceph_version": "ceph version 12.2.12-45.1.fix.el7cp (a6f565f1ec9e6650a496e00d37a2eae8cca49b17) luminous (stable)",
"cpu": "Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz",
"default_device_class": "ssd",
"distro": "rhel",
"distro_description": "Employee SKU",
"distro_version": "7.6",
"front_addr": "192.168.96.24:6804/348054",
"front_iface": "p7p1",
"hb_back_addr": "192.168.96.24:6805/348054",
"hb_front_addr": "192.168.96.24:6805/348054",
"hostname": "storage1.redhat.com",
"journal_rotational": "0",
"kernel_description": "#1 SMP Tue Jul 9 16:53:14 UTC 2019",
"kernel_version": "3.10.0-957.27.2.el7.x86_64",
"mem_swap_kb": "8388604",
"mem_total_kb": "196268364",
"os": "Linux",
"osd_data": "/var/lib/ceph/osd/ceph-0",
"osd_objectstore": "bluestore",
"rotational": "0"
}