[Sheepdog] questions about qemu-img and sheepdog

[MORITA Kazutaka]

At Wed, 12 Jan 2011 21:17:25 +0800,
jidalyg_8711 wrote:
> Thanks your reply!
> 
> I'll try it again.
> 
> Some other questions:
> 1,The base image need to be a snapshot ?  Why can't be a raw image?
>    For local disk images ,The following commands worked well:
>    $ qemu-img -b debian-base.img -f qcow2 debian_inc.img

To simplify the implementation of Sheepdog.  I guess there is no
technical problem to use a file image as a backing file of a Sheepdog
vdi.  If there are many requests for the feature, I'm not against to
support it.

> 
> 2, I have do somethings and I found the following output:
>    
> [root at sim92 store_dir]# collie cluster info
> Waiting for other nodes joining
> Ctime                Epoch Nodes
> 2011-01-11 14:07:26     12 [10.60.1.93:7000, 10.60.1.92:7000, 10.60.1.94:7000]
> 
> And I can't use the sheepdog now . Why this happened ?

I think you stopped Sheepdog without running 'collie cluster shutdown'.

If so, see
  http://lists.wpkg.org/pipermail/sheepdog/2011-January/000827.html
to fix the cluster state.


Thanks,

Kazutaka


> 
> Thanks you very much !
> 
> yaronli
> 2011-01-12 
> 
> 
> 
> jidalyg_8711 
> 
> 
> 
> 发件人： MORITA Kazutaka 
> 发送时间： 2011-01-12  19:50:59 
> 收件人： jidalyg_8711 
> 抄送： sheepdog 
> 主题： Re: [Sheepdog] questions about qemu-img and sheepdog 
>  
> At Wed, 12 Jan 2011 10:49:03 +0800,
> jidalyg_8711 wrote:
> > 
> > [1  <multipart/alternative (7bit)>]
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> > 
> > Hi, I've used the sheepdog .It is the great project!
> > 
> > I have one question about qemu-img and sheepdog, 
> > Does sheepdog support the growable disk images (their size increase as non empty sectors are written),Like as :
> > 
> > $qemu-img -b sheepdog：debian -f qcow2 sheepdog : debian_inc
> A snapshot tag is missing for the base image, and you can use only a
> raw format for Sheepdog.
> > 
> > sheepdog : debian is the based image
> > sheepdog : debian_inc is the increase image.
> > 
> > I tried this command ,but failed. So how the sheepdog create the increase images?
> Try the followings:
>  1. Create a base image
>       $ qemu-img convert ./image.raw sheepdog:debian
>  2. Take a snapshot to use as a base image
>       $ qemu-img snapshot -c base sheepdog:debian
>  3. Create a cloned image from sheepdog:debian:base
>       $ qemu-img create -b sheepdog:debian:base sheepdog:debian_inc
> See also:
>   http://wiki.qemu.org/Features/Sheepdog/Getting_Started
> Thanks,
> Kazutaka
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> [2  <text/plain; us-ascii (7bit)>]
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