[DRBD-user] DRBD State Confusion

Usman Ahmad usmanamalik at gmail.com
Mon Sep 18 15:21:42 CEST 2006

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


Hi,

Thanx for the explanation. Just curious what "halt -f" does? related to DRBD
or is it a system command?

Regards
Usman

On 9/16/06, Tim Jackson <lists at timj.co.uk> wrote:
>
> Usman Ahmad wrote:
>
> Hi, it would be easier if you didn't top-post. Thanks.
>
> > No, there is no firewall setup, but same question again, it may be
> > stupid. How long does a drbd node wait for changing the other node to
> > unknown state ( i guess this is done through different timeout
> > parameters etc.), and if the other server comes back up again, is it
> > changed normally or not?
>
> First, just in case it wasn't clear, DRBD doesn't change the status of
> the *local* node; only an external program (e.g. Heartbeat) does that.
> As for what it shows for the status of the *remote* node, well, I
> haven't read the code but it normally seems to me to be pretty fast.
> Again, read the logs: if the local node is primary (and writes are
> taking place, I think), then you should start seeing "ko" warnings
> quickly, and how long before the other node is declared dead depends on
> the "ko-count" configuration option. You will see all kinds of warnings
> from DRBD when the nodes can't communicate. See also my bug report on
> this list the other day though, about DRBD not reporting a transition of
> the remote node to "Unknown" status in the logs.
>
> > on-degr-cmd "echo '!DRBD! pri on incon-degr' | wall ; sleep 60 ; halt
> -f";
> > halt -f?
>
> That's not directly related. This is what happens if the machine is
> inconsistent and the cluster is degraded when DRBD starts (i.e. the
> machine should be becoming primary, but it doesn't have a full copy of
> the data).
>
> Tim
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-- 
Usman Ahmad Malik
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