Re: [kvm-devel] [Qemu-devel] Re: [PATCH] Add support for a configuration file

[Daniel P. Berrange]

On Thu, May 15, 2008 at 11:04:47AM +0300, Avi Kivity wrote:
> Daniel P. Berrange wrote:
> >With this kind of syntax, now tools generating config files need to make
> >up unique names for each drive. So you'll probably end up with them just
> >naming things based on the class name + a number appended.
> >  
> 
> I would hope that tools don't have to resort to reading and writing 
> these config files.  Usually a management system would prefer storing 
> parameters in its own database, and writing a temporary config file just 
> to pass the data seems awkward.  I would much prefer to see the command 
> line and monitor retain full control over every configurable parameter.

I expect that libvirt will create config files - it is only a matter of
time before we hit the command line ARGV length limits - particularly
with the -net and -drive syntax. People already requesting that we support
guests with > 16 disks, and > 8 network cards so command lines get very
long. 

I wouldn't write out the config file to disk though - I'd just send it
on the fly on stdin -, eg   'qemu -config -'  to tell it to read the config
on its stdin.

Regards,
Daniel.
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