[ClusterLabs] DRBD or SAN ?

Lentes, Bernd bernd.lentes at helmholtz-muenchen.de
Tue Jul 18 14:29:15 EDT 2017

>> On SLES 11 SP4 HAE DRBD 8.4 is available. Do i need a cluster fs on top of a
>> dual primary DRBD ?
>> I assume.
>> Bernd
> Depends.
> If you want to have a shared FS, yes. If you want to back VMs though, we
> use clustered LVM to manage the DRBD space, creating per-VM LVs, and
> then use the resource manager to manage the servers. This keeps the LVM
> data in sync and avoids the cost of cluster locking.

Hi Digimer,

just to be clear: we have already cLVM because i'd like to store the vm's in plain logical volumes, without fs.
That's running already. If i want live migration of vm's which resides on the plain logical volumes in conjunction with DRBD
(DRBD on top of the lv ?) i don't need a cluster fs ?

Thanks for the clarification.


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