Re: [Qemu-devel] [RFC] Disk integrity in QEMU

[Paul Brook <paul@codesourcery.com>]

>> - OS development tool
>> - casual or client-side virtualization
>> - server partitioning

> > Absoutely agree that the default should be safe. I don't have enough 
> > knowledge to say whether O_DIRECT/O_DSYNC is best - which also implies
> > we should choose the best setting by default, because we can't expect
> > users to know the tradeoffs either.
>
> The fact that there are different use models for qemu implies that the
> default must be chosen at some higher level than qemu code itself.  It
> might be done using /etc/qemu or ~/.qemu, or at the management
> interface, but there is no best setting for qemu itself.

This suggests that the most appropriate defaults are for the users that are 
least likely to be using a management tool.  I'd guess that the server 
partitioning folks are most likely to be using a management tool, so qemu 
defaults should be setup for casual/development use. I don't have hard data 
to back this up though.

Paul