Re: [Qemu-devel] Storage requirements for live migration

[Anthony Liguori]

On 11/11/2011 04:43 PM, Ryan Harper wrote:
> > == Image Formats ==
> >
> > Image formats are not safe to use with live migration.  The reason is that
> > QEMU caches data for image formats and does not have a mechanism to flush
> > those caches.  The following attempts to describe the issues with the
> > various formats
> >
> > === QCOW2 ===
> >
> > QCOW2 caches two forms of data, cluster metadata (L1/L2 data, refcount
> > table, etc) and mutable header information (file size, snapshot entries,
> > etc).
> >
> > This data needs to be discarded before after migration starts.
>
> before after?
>
> pick one =)

Er, the sentence is intelligible with either word.  I've updated the wiki with 
something that actually makes sense :-)

Regards,

Anthony Liguori

>