NAME

       zpool-trim — initiate TRIM of free space in ZFS storage pool

SYNOPSIS

       zpool trim [-dw] [-r rate] [-c|-s] pool [device]…

DESCRIPTION

       Initiates  an  immediate  on-demand  TRIM  operation for all of the free space in a pool.  This operation
       informs the underlying storage devices of all blocks in the pool which are no longer allocated and allows
       thinly provisioned devices to reclaim the space.

       A manual on-demand TRIM operation can be initiated irrespective of the autotrim  pool  property  setting.
       See the documentation for the autotrim property above for the types of vdev devices which can be trimmed.

       -d, --secure
               Causes  a secure TRIM to be initiated.  When performing a secure TRIM, the device guarantees that
               data stored on the trimmed blocks has been erased.  This requires support from the device and  is
               not supported by all SSDs.

       -r, --rate rate
               Controls  the  rate at which the TRIM operation progresses.  Without this option TRIM is executed
               as quickly as possible.  The rate, expressed in bytes per second, is applied on a per-vdev  basis
               and may be set differently for each leaf vdev.

       -c, --cancel
               Cancel  trimming on the specified devices, or all eligible devices if none are specified.  If one
               or more target devices are invalid or are not currently being trimmed, the command will fail  and
               no cancellation will occur on any device.

       -s, --suspend
               Suspend trimming on the specified devices, or all eligible devices if none are specified.  If one
               or  more target devices are invalid or are not currently being trimmed, the command will fail and
               no suspension will occur on any device.  Trimming can then be resumed by running zpool trim  with
               no flags on the relevant target devices.

       -w, --wait
               Wait until the devices are done being trimmed before returning.

PERIODIC TRIM

       On  machines  using  systemd,  trim  timers can be enabled on a per-pool basis.  weekly and monthly timer
       units are provided.

               systemctl enable zfs-trim-weekly@rpool.timer --now

               systemctl enable zfs-trim-monthly@otherpool.timer --now

SEE ALSO

       systemd.timer(5), zpoolprops(7), zpool-initialize(8), zpool-wait(8)

OpenZFS                                           May 27, 2021                                     ZPOOL-TRIM(8)