[lxc-users] About size of images

[Matthew Hannigan]

Do a du in /usr/share/vnuml/filesystems.
You should find that those use a lot less than 2g each.
It's because vnuml uses sparse files:
http://en.wikipedia.org/wiki/Sparse_file


On Thu, Jul 17, 2014 at 10:12 PM, Marcel Sánchez Toledano <
marcelsanchezt at gmail.com> wrote:

> Hi,
>
> I'm right now working in a project comparing SIMCTL (VNUML utility, UML)
> with LxC. In VNUML the aprox. size of virtual machines filesystems located
> in /usr/share/vnuml/filesystems are 2GB:
>
>
> *marcel at ubuntu:/usr/share/vnuml/filesystems$ ls -lh*
> *total 4.1G*
> *-rw-r--r-- 1 root root 2.0G Oct  9  2013 debian5.fs*
> *-rw-r--r-- 1 root root 2.0G Jul  3 07:52 debian6.fs*
>
>
> And the size of a LxC rootfs is 246MB:
>
> [image: Imatge inserida 1]
>
>
> How is this possible and which is the explanation of this? The difference
> of sizes is huge!
>
> Thanks,
>
> *Marcel Sánchez Toledano*
>
>
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> lxc-users at lists.linuxcontainers.org
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>
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