[DRBD-user] active-active mode

raulhp at ugr.es raulhp at ugr.es
Wed Sep 26 10:30:17 CEST 2012

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

Thank you very much, I understand that support dual-primary mode is
included from version 8.4 of DRBD, I'll try with pacemaker, and commented
on the experience.


> On 09/25/2012 02:11 PM, raulhp at ugr.es wrote:
>> Hi,
>> How I can to use active-active mode or primary-primary mode? I
>> understand
>> that I can to use with file system for a cluster GFS, etc.
>> Tell me please.
>> Regards!
> In DRBD, this is called "dual-primary" mode. You are write in that you
> need a cluster-aware file system like GFS2, which I use, or OCFS2.
> The most important thing you need to make dual-primary safe is to have a
> fence device. This is a mechanism for forcing one of the nodes to power
> off if the communications between the node breaks. This can be provided
> by a cluster resource manager like Red Hat's cluster service or pacemaker.
> Beyond this, the topic starts to get more complex. If you want more
> advice, you will need to be a little more specific on what it is you
> want to do.
> --
> Digimer
> Papers and Projects: https://alteeve.ca

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