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)