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Re: [Bug 498523] Re: Add on-line write compression support to qcow2
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From: |
Eric Blake |
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Subject: |
Re: [Bug 498523] Re: Add on-line write compression support to qcow2 |
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Date: |
Thu, 19 Nov 2020 08:26:08 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 |
On 11/19/20 3:39 AM, Thomas Huth wrote:
> As far as I know, QEMU v5.1 now has support for compression filters,
> e.g. by creating a qcow2 image with:
>
> qemu-img create -f qcow2 -o compression_type=zlib image.qcow2 1G
>
> ... so I think we can finally mark this ticket here as done.
That says what compression type to use when writing the entire disk in
one pass, but not online write compression. I think we may be a bit
premature in calling this 'fix released', although I'm not certain we
will ever try to add the feature requested.
>
> ** Changed in: qemu
> Status: Confirmed => Fix Released
>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org