Ceph » RADOS

2020-01-13T00:00:13.035 INFO:teuthology.orchestra.run.smithi040:> sync && sudo umount -f /var/lib/ceph/osd/ceph-2
2020-01-13T00:00:13.210 INFO:teuthology.orchestra.run.smithi040.stderr:umount: /var/lib/ceph/osd/ceph-2: target is busy.
2020-01-13T00:00:13.212 DEBUG:teuthology.orchestra.run:got remote process result: 32
2020-01-13T00:00:13.212 INFO:teuthology.orchestra.run.smithi040:> sudo PATH=/usr/sbin:$PATH lsof ; ps auxf
2020-01-13T00:00:13.343 INFO:teuthology.orchestra.run.smithi040.stdout:COMMAND     PID   TID            USER   FD      TYPE             DEVICE SIZE/OFF       NODE NAME
...
2020-01-13T00:00:13.957 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  cwd       DIR                8,1     4096          2 /
2020-01-13T00:00:13.957 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  rtd       DIR                8,1     4096          2 /
2020-01-13T00:00:13.958 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  txt       REG                8,1    43088       1807 /sbin/fstrim
2020-01-13T00:00:13.958 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1  3311664      11177 /usr/lib/locale/locale-archive
2020-01-13T00:00:13.958 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   144976       1918 /lib/x86_64-linux-gnu/libpthread-2.27.so
2020-01-13T00:00:13.958 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1    14560       1906 /lib/x86_64-linux-gnu/libdl-2.27.so
2020-01-13T00:00:13.958 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   464824       1970 /lib/x86_64-linux-gnu/libpcre.so.3.13.3
2020-01-13T00:00:13.959 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1    27112       1897 /lib/x86_64-linux-gnu/libuuid.so.1.3.0
2020-01-13T00:00:13.959 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1    31680       1920 /lib/x86_64-linux-gnu/librt-2.27.so
2020-01-13T00:00:13.959 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   154832       1976 /lib/x86_64-linux-gnu/libselinux.so.1
2020-01-13T00:00:13.959 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   311720       1988 /lib/x86_64-linux-gnu/libblkid.so.1.1.0
2020-01-13T00:00:13.960 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1  2030544       1903 /lib/x86_64-linux-gnu/libc-2.27.so
2020-01-13T00:00:13.960 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   340232       1936 /lib/x86_64-linux-gnu/libmount.so.1.1.0
2020-01-13T00:00:13.960 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root  mem       REG                8,1   170960       1894 /lib/x86_64-linux-gnu/ld-2.27.so
2020-01-13T00:00:13.960 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root    0r      CHR                1,3      0t0          6 /dev/null
2020-01-13T00:00:13.960 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root    1u     unix 0xffff999e968a6400      0t0     430836 type=STREAM
2020-01-13T00:00:13.961 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root    2u     unix 0xffff999e968a6400      0t0     430836 type=STREAM
2020-01-13T00:00:13.961 INFO:teuthology.orchestra.run.smithi040.stdout:fstrim    69389                  root    3r      DIR              253,3      191         32 /var/lib/ceph/osd/ceph-2
...
2020-01-13T00:00:14.010 INFO:teuthology.orchestra.run.smithi040.stdout:root       69389  0.0  0.0  25636  1288 ?        Ds   00:00   0:00 /sbin/fstrim -av

/a/sage-2020-01-12_21:37:03-rados-wip-sage-testing-2020-01-12-0621-distro-basic-smithi/4660834

from the man page,

       -a, --all
              Trim all mounted filesystems on devices that support the discard operation.  The other supplied options, like --offset, --length and --minimum, are applied to all these devices.  Errors from filesystems that do not support the discard operation are silently ignored.

on ubuntu, it's run by

  fstrim.timer                                                                             loaded active waiting   Discard unused blocks once a week