[DRBD-user] Enabling a stacked resource - HELP!

Bart Coninckx bart.coninckx at telenet.be
Thu Sep 8 21:36:55 CEST 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 09/08/11 18:23, Lars Ellenberg wrote:
> On Thu, Sep 08, 2011 at 09:07:25AM -0700, SlingPirate wrote:
>> Sorry about this it's just that I want to be absolutely certain.
>> With the 3 node setup i could have both node 1&  node 2 reading&  writing at
>> the same time?
>> Both local nodes would
> No, of course not.  And that is not needed.
> How about one DRBD per VM backing store block device?
> But if you insist on the complexity of using image files on some cluster
> file system on dual primary DRBD, with proper fencing, of course,
> that's your call.  That would not necessarily help to improve your
> availability, or performance, though.
>> Lars Ellenberg wrote:
>>> On Thu, Sep 08, 2011 at 08:47:12AM -0700, SlingPirate wrote:
>>>> If I want to run VMs on both node 1&  node 2 they would need to be setup
>>>> as
>>>> dual primaries, is this not the case?
>>> No.
>>>> What I was trying to achive was two on-site servers that could fail over
>>>> to
>>>> one another OR in case both die node 3 runs all the servers (rather
>>>> slowly
>>>> of course!)
>>> Do a "classic" stacked three node setup.
>>>> Sorry for my ignorance but I dont quite understand your diagram for the
>>>> alternative.
>>> No need anymore...

What about of he wants to have HVM DomUs? Would he still be able to do 
without the complexity of a cluster filesystem and image files?
I could be wrong, but that is what I understand from:


"There are three sets of circumstances under which you cannot use this 

     You are configuring a fully virtualized (HVM) domU."



More information about the drbd-user mailing list