[DRBD-user] active-active mode

Digimer lists at alteeve.ca
Wed Sep 26 15:23:31 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.

Dual-primary works just fine in the 8.3 line. I've used it extensively 
going back to 8.3.9 up to the current 8.3.13.

On 09/26/2012 04:30 AM, raulhp at ugr.es wrote:
> 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.
> Greetings!
>> 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

Papers and Projects: https://alteeve.ca

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