Re: [Qemu-devel] Adding Disk-Level Introspection to QEMU

[Wolfgang Richter]

--
Wolf

On Apr 23, 2013, at 1:22 PM, Eric Blake <address@hidden> wrote:

> On 04/23/2013 11:12 AM, Wolfgang Richter wrote:
>> I'm interested in adding introspection of disk writes to QEMU for various
>> applications and research potential.
>> 
>> What I mean by introspection of disk writes is that, when enabled, each
>> write
>> passing through QEMU to backing storage would also be copied to an
>> introspection channel for further analysis.
> 
> Sounds like you would be benefited by the block-backup series, with an
> NBD server as the point where you inject your introspection.
> 
> https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg04629.html
> 
> The existing drive-mirror command can also target an NBD destination,
> with similar effects.

Yes, OK as a new member to the list I saw the block-backup series and was 
starting to have similar thoughts.  I'll port my code (analysis side) to work 
with it (or drive-mirror).

Has there been any performance analysis of drive-mirror (impact on executing 
guest)?


> -- 
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org