Re: determining snapshot overhead

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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

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