[PVE-User] Discard transmission between VM / LVM / mdadm layers ?

Frédéric MASSOT frederic at juliana-multimedia.com
Fri Dec 13 16:52:41 CET 2019


Le 13/12/2019 à 13:15, Alexandre DERUMIER a écrit :
> When a VM sends a discard/trim command, is it sent to the SSD, LVM does 
> not block the command? 
> 
> Hi, yes it's working with lvm (lvm thin only)

Ah, there is the subtlety, lvm-thin transmits discard/trim commands, but
not lvm. It is therefore necessary to use the storage type lvm-thin and
not lvm.

I installed the server with the Debian installer and then I installed
Proxmox. The Debian installer uses the type lvm and not lvm-thin.


Regards.
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