Re: [uml-devel] How to copy COW files to another machine across the network?

[roland <for...@gm...>]

hi!
> You can't move COW files around 
but i`d like to move around my uml`s!
hey - this is one of the uml benefits: you have a virtual machine which 
is independent from hardware and is _generally_ quite "relocateable".
if it would have swsusp - i could even relocate a running instance - like
i can do with vmware.
why was that relocateability being made difficult artificially by putting 
that "features" into COW? is this "problem" going to be adressed?
regards
roland


----- Original Message ----- 
From: "Henrik Nordstrom" <hn...@ma...>
To: "Shao-Lin Joseph Chung" <sc...@cs...>
Cc: "UML User list" <use...@li...>; "UML Devel list" <use...@li...>
Sent: Friday, November 28, 2003 9:49 AM
Subject: Re: [uml-devel] How to copy COW files to another machine across the network?


> On Fri, 28 Nov 2003, Shao-Lin Joseph Chung wrote:
> 
> > As the subject says, I'm trying to copy the COW files across the network. 
> > But the size of those copies got expanded to the same size of the backing
> > file.
> 
> You can't move COW files around unless you make a tool to adjust the COW
> file header after the move. If not UML will disregard the COW file as
> invalid and revert to the backing file copy.. UML checks that the 
> following parameters match the backing file
>   * Full file name including path
>   * File size
>   * Modification timestamp
> 
> Regarding the size: You need to use a copying tool which accounts for 
> holes in the file. See for example the --sparse option to cp.
> 
> Regards
> Henrik
> 
> 
> 
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