[DRBD-user] Question: how to avoid full resync

[Lars Ellenberg]

On Sun, May 17, 2009 at 05:12:50PM +0300, Eli Dorfman (Voltaire) wrote:
> Lars Ellenberg wrote:
> > On Thu, May 14, 2009 at 04:45:44PM +0300, Eli Dorfman (Voltaire) wrote:
> >> Lars Ellenberg wrote:
> >>> On Wed, May 13, 2009 at 06:35:43PM +0300, Eli Dorfman (Voltaire) wrote:
> >>>> Hi,
> >>>>
> >>>> Assuming a setup of 2 nodes primary A and secondary B.
> >>>> After primary node A reboot and B became primary, is there a way to avoid full resync
> >>>> from B to A?
> >>> Uhm, well, yes: just do nothing and let DRBD do its job ;)
> >>> Bitmap based resync is the "normal" resync operation.
> >>>
> >> After A was rebooted and B had almost no changes - 
> >> yet when A goes up again it seems that B (drbd) performs full resync.  
> > 
> > what makes you think so?
> 
> That's what I see in /proc/drbd.
> we have a partition of 20GB and from the link speed and the time till process is completed,
> it seems that drbd performs full resync.
> 
> >> Is this correct?
> > 
> > it would not be expected.
> 
> So what could be the reason for this full resync?

I still doubt the full sync, though.
care to show logs?

-- 
: Lars Ellenberg                
: LINBIT HA-Solutions GmbH
: DRBD®/HA support and consulting    http://www.linbit.com

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