Re: [Xen-users] Is XVD live resize possible?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Apr 07, 2008 at 11:51:36AM -0700, Jayson Vantuyl wrote:
> Consider this to be my vote for block-reconfigure working.  I suspect  
> it wouldn't take much work actually.
> 
> In retrospect, it's completely possible to concatenate devices at  
> runtime using device mapper.  It's the same thing that LVM does under  
> the sheets.  If you somehow got your root on a DM device (initrd  
> maybe?), then you could live-modify it to add in another device you  
> pass through.  It's fraught with peril, but completely possible.
> 

Please check this recent thread on xen-devel:

http://lists.xensource.com/archives/html/xen-devel/2008-09/msg00158.html

It seems block-reconfigure has never worked for online resizing xen domU xvd 
disks.. 

It is now being looked at and considered for Xen 3.4 as a new feature. 

-- Pasi

> On Apr 7, 2008, at 9:56 AM, Florian Heigl wrote:
> 
> >2008/4/7, Jayson Vantuyl <jvantuyl@xxxxxxxxxxxxxx>:
> >>I think the developers have kind of let this one go.
> >>
> >>Once upon a time, in addition to block-detach and block-attach  
> >>there was
> >>also block-configure.  Block-configure supposedly told the inner  
> >>DomU to
> >>refresh its idea of the block device.  It stopped working a while  
> >>back, a
> >>few people complained, it was never fixed.
> >>
> >>I haven't tested it, but this would be the "right way" to do  
> >>it...if it
> >>worked.
> >
> >that was highly enlightening...
> >
> >block-reconfigure would have allowed to reliably resize storage
> >without shutting down domUs (yes, yes, with pvresize or other rescans
> >and of course a capable filesystem, but lets stick to the root issue).
> >I used to concatenate filesystem images using dd skip=xx but never
> >found a way to notify the domU of a successful change. add in the
> >fact, that large numbers of [ phy:... or, even worse file: ] disk
> >definitions tend to be unreliable and it would be REALLY great to get
> >the feature back.
> >
> >maybe we can start a little rally to make someone from -devel aware
> >this is a NEEDED feature?
> >
> >rgds,
> >florian
> >
> >-- 
> >'Sie brauchen sich um Ihre Zukunft keine Gedanken zu machen'
> 
> -- 
> Jayson Vantuyl
> Systems Architect
> Engine Yard
> jvantuyl@xxxxxxxxxxxxxx
> 1 866 518 9275 ext 204
> 

> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users