[ceph-users] switching to ceph-volume requires changing the default lvm.conf?

I was wondering if switching to ceph-volume requires me to change the default centos lvm.conf? Eg. The default has issue_discards = 0 Also I wonder if trimming is the default on lvm's on ssds? I read somewhere that the dmcrypt passthrough of trimming was still secure in combination with a btrfs filesystem.