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Re: [Qemu-discuss]  qcow2 performance improve

From: Alberto Garcia
Subject: Re: [Qemu-discuss]  qcow2 performance improve
Date: Wed, 15 Aug 2018 18:04:11 +0200
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Wed 15 Aug 2018 05:47:57 PM CEST, Jakob Bohm wrote:
> And don't forget the high-speed solution: Create the qcow2 file with
> all clusters preallocated in contiguous file clusters in a
> non-fragmented file on the underlying physical disk(s).
> I believe there are qemu-img options to create such qcow2 files


qemu-img create -f qcow2 -o preallocation=falloc ...
qemu-img create -f qcow2 -o preallocation=full   ...


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