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LVM setup with snapshots

I'm completely new to lvm.

lvs                                                                                                                                                                                                                      LV     VG       Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
root   build-vg -wi-ao---- 463.52g
swap_1 build-vg -wi-ao----   2.00g

I used the default stretch of an lvm partition with the gnome.

To me, it seems me the partition is too large to to reduce for snapshots.

I'm prolly not 'getting' lvm yet.

What would be a good layout for a stretch install doing lvm snapshots?


"I've bin kinda lazy lately'