Re: [Qemu-devel] QEMU/pc and scsi disks

[Anthony Liguori]

Avi Kivity wrote:
> Anthony Liguori wrote:
> > > 1.  Any option should be settable either in the config file or 
> > > command line.  In other words, the user should not be forced to use 
> > > a config file.  This is useful for management programs who keep all 
> > > options in an internal database, and for users who can experiment 
> > > via a ^P edit edit edit <enter>.
> >
> > I think we should still provide the ability to set the most common 
> > options via the command line.  I'm also fine with specifying single 
> > options on the command line.  I suspect though that being able to do 
> > -config - is more useful for management tools than building large 
> > strings of command line options.
>
> Out of curiosity, why?  If the options are store in some database, as 
> is likely, surely it is easier to generate a longish command line than 
> to generate a unique name for a file, remove it if it already exists, 
> write out the data, launch qemu, and clean up the file later?  And for 
> migration, you have to regenerate it, since some options may have 
> changed (cdrom media).

Sorry, I should have been more specific.  I mean '-config -' where '-' 
would indicate reading from stdin.

Regards,

Anthony Liguori

> Of course the config file is very useful for a user maintaining a few 
> virtual machines on their own, but when qemu is part of a longer food 
> chain, I think it's just a complication.