From: "Christian MICHON" <christian.michon@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] QCow v2
Date: Tue, 4 Jul 2006 15:16:24 +0200 [thread overview]
Message-ID: <46d6db660607040616s3d853a64k2a1b6cdc6805cf8f@mail.gmail.com> (raw)
In-Reply-To: <46d6db660607040603t202c7b62ycc80d2e87d7bd660@mail.gmail.com>
ok, I used "split -b 4k" on a 7716864 bytes qcow.
I used standard lzma compression and get 1884 7z-clusters
with a grand total of 3558617 bytes (indeed the gain is small).
The standard zlib qcow gave 3704180 bytes...
Does it make sense to have a cluster based compression ?
Indeed the actual compression is not so impressive then (zlib
or not zlib based).
On 7/4/06, Christian MICHON <christian.michon@gmail.com> wrote:
> sorry I was not clear here...
>
> On 7/4/06, Fabrice Bellard <fabrice@bellard.org> wrote:
> > > how to split into individual clusters a qcow image ?
> >
> > A good approximation is to use an uncompressed qcow image, or even a raw
> > image in which you exclude the empty clusters.
> >
> > Fabrice.
>
> how do I cut into the actual 4k clusters an existing qcow image ?
> any bash script or executable to perform this trick ?
>
> --
> Christian
>
--
Christian
next prev parent reply other threads:[~2006-07-04 13:16 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-04 2:45 [Qemu-devel] QCow v2 Nathaniel McCallum
2006-07-04 8:12 ` Johannes Schindelin
2006-07-04 8:49 ` Raphaël Rigo
2006-07-04 9:23 ` Fabrice Bellard
2006-07-04 10:44 ` Christian MICHON
2006-07-04 10:57 ` Fabrice Bellard
2006-07-04 11:28 ` Julian Seward
2006-07-04 11:01 ` Johannes Schindelin
2006-07-04 11:13 ` Elefterios Stamatogiannakis
2006-07-04 13:51 ` Christian MICHON
2006-07-04 15:04 ` Natalia Portillo
2006-07-11 11:30 ` Christian MICHON
2006-07-11 17:43 ` André Braga
2006-07-04 11:14 ` Christian MICHON
2006-07-04 11:26 ` Fabrice Bellard
2006-07-04 12:13 ` Christian MICHON
2006-07-04 12:22 ` Fabrice Bellard
2006-07-04 13:03 ` Christian MICHON
2006-07-04 13:16 ` Christian MICHON [this message]
2006-07-04 13:28 ` Johannes Schindelin
2006-07-04 13:01 ` Nathaniel McCallum
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