/opt/cassandra/bin/nodetool status
Datacenter: sesi_rocquencourt
=============================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address          Load       Tokens  Owns (effective)  Host ID                               Rack 
UN  192.168.100.184  88.65 KiB  16      34.3%             e0c24d24-6f68-4a26-8561-94e67b58211a  rack1
UN  192.168.100.181  84.71 KiB  16      31.3%             1d9b9e7d-b376-4afe-8f67-482e8412f21b  rack1
UN  192.168.100.186  69.07 KiB  16      34.2%             0dd3426d-9159-47bd-9b4e-065ff0fbb889  rack1
UN  192.168.100.183  69.08 KiB  16      37.1%             78281a92-7fa0-43bd-bc33-c5b419ee8715  rack1
UN  192.168.100.185  69.07 KiB  16      32.2%             abf9b69e-3cec-4ac3-a195-a54481e4d9da  rack1
UN  192.168.100.182  74.05 KiB  16      30.9%             eca5ea5d-8bd5-4301-9a5e-ffa01aa1b7e5  rack1

# mixedused
ls /dev/disk/by-id/nvme-MO003200KXAVU* | grep -v part | xargs -t zpool create -o ashift=12 -O mountpoint=none mixeduse
zfs create -o mountpoint=/srv/cassandra/instance1/data mixeduse/cassandra-instance1-data

zpool create -o ashift=9 -O mountpoint=none mixeduse /dev/disk/by-id/nvme-MO003200KXAVU_SJA4N7938I0405A0U
zfs create -o mountpoint=/srv/cassandra/instance1/data -o atime=off -o relatime=on mixeduse/cassandra-data
cd /srv/cassandra/instance1/data
bonnie++ -d . -m cassandra04 -u nobody                                                                                                                                                                                                                                                 
Using uid:65534, gid:65534.
Writing a byte at a time...done
Writing intelligently...done
Rewriting...done
Reading a byte at a time...done
Reading intelligently...done
start 'em...done...done...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version  2.00       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Name:Size etc        /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
cassandra04 515496M  293k  99  1.0g  99  703m  99  661k  99  1.4g  91 13717 463
Latency             48216us    7316us    8224us   23303us    7928us    1606us
Version  2.00       ------Sequential Create------ --------Random Create--------
cassandra04         -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 16384  98 +++++ +++ 16384   8 +++++ +++ +++++ +++ 16384  99
Latency              2679us    1207us    4851ms    2850us     138us     301us
1.98,2.00,cassandra04,1,1659338044,515496M,,8192,5,293,99,1080974,99,720299,99,661,99,1488832,91,13717,463,16,,,,,28232,98,+++++,+++,2018,8,+++++,+++,+++++,+++,24821,99,48216us,7316us,8224us,23303us,7928us,1606us,2679us,1207us,4851ms,2850us,138us,301us