[DRBD-user] Dual Primary while sync is in progress

Phil Stricker stril at gmx.de
Fri Apr 9 14:22:35 CEST 2010

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Hi!

I am a bit confused about that problem. What happens in that case?

The "second" node comes online, the sync is starting and the ressource 
is getting primary.

Is that dangerous?

How can I be sure, the the ressource is primary _after_ the full sync?

Phil

Am 04.02.2010 21:15, schrieb Sebastian Urban:
> Hi.
>
> I was unable to figure out from the documentation if it is allowed to
> have two nodes in dual primary configuration while sync is in progress.
>
> Currently the status is as follows:
>
> root at host1# drbd-overview
>    1:vm_drbd  SyncSource Primary/Primary UpToDate/Inconsistent C
> 			  r---- /srv/vms ocfs2 250G 17G 234G 7%
> 	[>...................] sync'ed:  8.7% (233980/255992)M
>
> root at host2# drbd-overview
>    1:vm_drbd  SyncTarget Primary/Primary Inconsistent/UpToDate C
> 			  r---- /srv/vms ocfs2 250G 17G 234G 7%
> 	[>....................] sync'ed:  3.8% (246388/255992)M
>
> Will both hosts see consistent data (i.e. from the SyncSource) during
> the sync? Will writes from the SyncTarget also end up on the SyncSource?
> Or will this lead to data corruption?
>
> Thanks,
> Sebastian
>
>
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