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Re: [Qemu-devel] [RFC] Re-evaluating subcluster allocation for qcow2 ima


From: Alberto Garcia
Subject: Re: [Qemu-devel] [RFC] Re-evaluating subcluster allocation for qcow2 images
Date: Thu, 27 Jun 2019 17:42:23 +0200
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Thu 27 Jun 2019 05:38:56 PM CEST, Alberto Garcia wrote:
>> I would consider 64k cluster/8k subcluster as too extreme for me.

I forgot to add: this 64k/8k ratio is only with my current prototype.

In practice if we go with the 128-bit L2 entries we would have 64
subclusters per cluster, or 32 if we want to have a separate
QCOW_OFLAG_ZERO for each subcluster (would we need this?).

Berto



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