On 2009-09-13 19:57, PieterB wrote: > Hello, > > I'm about to create a DRBD cluster with 2 disks per node. I want to use dual > primary mode, in order to be able to write to both nodes concurrently. > > If I interpret http://www.drbd.org/users-guide/s-dual-primary-mode.html > correctly dual-primary-mode requires the use of a shared cluster file system > that utilizes a distributed lock manager, such as GFS(2) or OCFS2 filesystem. > > I was wondering if using ext3 is also possible when using dual primary mode. > The DRBD-docs seem to state that this is impossible. I was amazed, that > according to the Ubuntu server guide, > https://help.ubuntu.com/9.04/serverguide/C/drbd.html this seems a possible > setup. The example on that page uses "allow-two-primaries" and ext3 as > filesystem.
Ante, can you please drop a note to the Ubuntu Server Guide documentation maintainers that the example of configuring ext3 on top of dual-Primary DRBD is utter nonsense? AFAICS the example does not actually mention *mounting* the device on both nodes, so what they are documenting is actually a single-Primary setup anyway. So they probably just want to delete the "allow-two-primaries;" line from their example conf and be fine. Thanks, Florian
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