[linux-lvm] lvmtrim

[Alasdair G Kergon]

On Wed, Oct 19, 2011 at 02:48:20PM +0200, Yann Droneaud wrote:
> Is there any tool for LVM like fstrim(8) (which would likely be called
> "lvmtrim") ?
 
vgtrim

> This tool would discard currently unused PE of an active VG like
> fstrim(8) is doing on ext4,btrfs,xfs blocks (depending on filesystem
> support).

Sounds a reasonable idea to me, although I question how the PEs that
would benefit from it would have got into that state in the first place,
given that lvreduce already has trim support if you had
devices/issue_discards = 1 in your lvm.conf.
 
Alasdair