[DRBD-user] Bad network connection causing DRBD to freeze

[Lars Ellenberg]

On Tue, Feb 03, 2009 at 03:52:30PM +0100, Rainer Sabelka wrote:
> On Tuesday 03 February 2009 09:41:42 Lars Ellenberg wrote:
> > On Mon, Feb 02, 2009 at 05:20:23PM +0100, Rainer Sabelka wrote:
> > > > if you configure your ko count smaller,
> > > > then if it actually reaches zero,
> > > > drbd stays disconnected (StandAlone),
> > > > until you tell it to reconnect explicitly.
> > >
> > > I just tried this on a pair of test machines (with ko-count=5).
> > > But DRBD always tries to reconnect.
> >
> > hm.  it should not.
> > if ko-count reaches zero, DRBD is supposed to go StandAlone.
> 
> This would be fine.
> Basiclaclly this is what I do manually now. If users complain that the server 
> "hangs" I say "drbdadm disconnect all".
> 
> > you say it just does a disconnect/reconnect cycle.
> > guess we have to have a look at this more closely.
> 
> Hmm. When ko-count reaches zero my DRBD goes to "Timeout", then to 
> "Unconnected", and again to "WFConnection", and the cycle continues.

right.
"bug" in drbd.
that used to be like I described above.  apparently this is a regression
(no longer works as I think we intended it), we'll discuss this and
probably fix it to work again as I described above.

so for now,
best you can do is to externally monitor the connection quality,
and disconnect if quality is insufficient.


-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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