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

[Anthony Liguori <anthony@codemonkey.ws>]

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.
>