[linux-lvm] determining snapshot overhead

[Zdenek Kabelac]

Dne 14.1.2015 v 08:24 Bram Klein Gunnewiek napsal(a):
> Hello,
>
> I am trying to create snapshots of thick volumes that can't break because they
> overflow (thin volumes are not an option right now). I can't find information
> on how to calculate (in advance) the metadata overhead of a snapshot when all
> blocks in the origin volume are changed (e.g. the snapshot is 100% full). Is
> there a way to do this?


Recent versions of lvm2  (let's say >= 111) are able to determine this size 
automatically - just use: 'lvcreate -s -l100%ORIGIN vg/origin'

Regards

Zdenek