All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Richard W.M. Jones" <rjones@redhat.com>
To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: 吴兴博 <wuxb45@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] disk image: self-organized format or raw file
Date: Tue, 12 Aug 2014 19:52:08 +0100	[thread overview]
Message-ID: <20140812185207.GH14001@redhat.com> (raw)
In-Reply-To: <20140812184630.GP8471@redhat.com>

On Tue, Aug 12, 2014 at 07:46:30PM +0100, Daniel P. Berrange wrote:
> Taking the compression feature - arguably the biggest benefit of that
> is when you distribute disk images. eg if someone provides a root disk
> image on a web server, using compression in qcow2 can dramatically
> lower the download size, while still allowing QEMU to directly run
> from that qcow2 file. Sure you could wrap your disk images in gzip
> and then convert to your local filesystem at time of use but this
> introduces multiple extra steps.

It would be nice if qemu could handle xz-compressed files
transparently, since (when prepared correctly) these files are
seekable.

I have written code to do this here:

  https://github.com/libguestfs/nbdkit/tree/master/plugins/xz

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org

  reply	other threads:[~2014-08-12 18:52 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-11 23:38 [Qemu-devel] disk image: self-organized format or raw file 吴兴博
2014-08-12  0:52 ` Fam Zheng
2014-08-12 10:46   ` 吴兴博
2014-08-12 11:19     ` Fam Zheng
     [not found]       ` <CABPa+v1a7meoEtjLkwygjuZEABTqd8q3efGWJvAsAr-mLTQb-A@mail.gmail.com>
     [not found]         ` <20140812113916.GB2803@T430.redhat.com>
2014-08-12 12:03           ` 吴兴博
2014-08-12 12:21             ` Fam Zheng
2014-08-12 13:08   ` Kirill Batuzov
2014-08-12 13:23 ` Eric Blake
2014-08-12 13:45   ` 吴兴博
2014-08-12 14:07     ` Eric Blake
2014-08-12 14:14       ` 吴兴博
2014-08-12 15:30         ` Eric Blake
2014-08-12 16:22           ` Xingbo Wu
2014-08-13  1:29             ` Fam Zheng
2014-08-13 15:42           ` Kevin Wolf
2014-08-12 18:39       ` Richard W.M. Jones
2014-08-12 18:46 ` Daniel P. Berrange
2014-08-12 18:52   ` Richard W.M. Jones [this message]
2014-08-12 19:23     ` Xingbo Wu
2014-08-12 20:14       ` Richard W.M. Jones
2014-08-13 15:54 ` Kevin Wolf
2014-08-13 16:38   ` Xingbo Wu
2014-08-13 18:32     ` Kevin Wolf
2014-08-13 21:04       ` Xingbo Wu
2014-08-13 21:35         ` Eric Blake
2014-08-14  2:42         ` Xingbo Wu
2014-08-14  9:06           ` Kevin Wolf
2014-08-14 20:53             ` Xingbo Wu
2014-08-15 10:46               ` Kevin Wolf

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20140812185207.GH14001@redhat.com \
    --to=rjones@redhat.com \
    --cc=berrange@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=wuxb45@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.