On Thu, 2009-08-20 at 09:38 -0600, Alan Sparks wrote:
> Ross Walker wrote:
> > On Aug 20, 2009, at 10:22 AM, Coert Waagmeester <lgroups@xxxxxxxxxxxxxxxxx
> > > wrote:
> >
> >> Hello all,
> >>
> >>
> >> I am running drbd protocol A to a secondary machine to have
> >> 'backups' of
> >> my xen domUs.
> >>
> >> Is it necessary to change the xen domains configs to use /dev/drbd*
> >> instead of the LVM volume that drbd mirrors, and which the xen domU
> >> runs
> >> of?
> >>
> >
> > Yes otherwise the data won't be replicated and your drbd volume will
> > be inconsistent and need resync'd.
> >
> > -Ross
> >
> > _______________________________________________
> >
>
> To be clear, are you saying you have a DRBD partition on both host
> machines, and LVM on top of that to allocate LVs for host storage?
>
> You would not want to bypass the LVM layer in that case. The hosts
> would be still configured to map the LV devices into the domUs. You
> need to go through the LVM layer, which uses the DRBD partition as a
> block physical device. The writes down through the DRDB layer will
> still be replicated.
> -Alan
>
Hello Alan,
This is my current setup:
Xen DomU
============
DRBD
============
LVM Volume
============
RAID 1
What I first wanted to do was:
DomU | DRBD
============
LVM Volume
============
RAID 1
Is this possible or not recommended?
Regards,
Coert
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