[DRBD-user] DRBD and KVM for a HA-Cluster ?

Digimer linux at alteeve.com
Thu Jan 6 20:04:04 CET 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On 01/06/2011 12:45 PM, J. Ryan Earl wrote:
> On Thu, Jan 6, 2011 at 11:01 AM, Lentes, Bernd
> <bernd.lentes at helmholtz-muenchen.de
> <mailto:bernd.lentes at helmholtz-muenchen.de>> wrote:
> 
>     Digimer wrote:
>     > >>
>     > >
>     > > I don't want to setup a DRBD as a PV. My idea is to set up
>     > a DRBD on top of a LV, and to format or not format this LV,
>     > depending on the decision to install a KVM into a file or a
>     > plain device.
>     > > Is this setup ok ?
>     >I don't want to use a DRBD as a PV.
> 
>     My setup is like that:
> 
>     <hardware raid>
>      |
>     <partition>
>      |
>     <PV(s)>
>      |
>     <VG>
>      |
>     <LV(s)>
>      |
>     <DRBD>
>      |
>     <FS or vm in a plain LV>
> 
> 
>     This should work ?
>     Which setup did you discuss with RH ? Your old one or mine ?
> 
> 
> He talked about his.  Your setup is fine.  You can use the DRBD devices
> directly as disks for VMs, it is in fact a great practice with
> dual-primaries.  Using a file on a filesystem for the VM disk will add
> considerable overhead and complication.
> 
> -JR

I agree with JR. Past experience showed me that VMs on dedicated LVs was
much preferable to file-based VMs.

-- 
Digimer
E-Mail: digimer at alteeve.com
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