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

Sebastian Urban urbans84 at gmail.com
Thu Feb 4 21:15:29 CET 2010

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


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?


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