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Re: [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for e

From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster
Date: Mon, 17 Apr 2017 11:49:25 +0800
User-agent: Mutt/1.8.0 (2017-02-23) 
On Fri, 04/14 14:30, 858585 jemmy wrote:
> Do you know some other format which have very small cluster size?

64k is the default cluster size for qcow2 but it can be configured at image
creation time, as 512 bytes, for example:

    $ qemu-img create -f qcow2 test.qcow2 -o cluster_size=512 1G

Fam
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