[Info-vax] delay in startup

FrankS sapienza at noesys.com
Sat Mar 24 17:19:11 EDT 2012


On Saturday, March 24, 2012 7:35:57 AM UTC-4, Phillip Helbig---undress to reply wrote:
> While I was travelling, power went off for a few hours for 
> maintenance.
>
>    13-MAR-2012 17:35:38.00 MINNIM 13-MAR-2012 17:38:31.84
>    13-MAR-2012 14:46:40.00 JANDER 13-MAR-2012 17:38:59.19
> 
> The three minutes for MINNIM between booting and writing to the file is
> about what I expect.  JANDER waited for MINNIM to boot (quorum is 2), so 
> that explains the almost three-hour wait between booting and writing for 
> JANDER, but why did MINNIM boot almost three hours after JANDER?  All 
> the nodes lost power at the same time.
> 

What do I win if I guess correctly?

Power failed around 14:46.

Jander crashed when quorum was lost, but its battery backup survived the entire (approximately) three hour outage. Therefore, it rebooted immediately and then went into a wait until quorum could be regained.

Minnim had no battery backup and crashed hard (and cold).

Power was restored around 17:35.

Minnim reboots.  Quorum is restored.  Due to variability in getting through the startup procedure Minnim writes the "I'm alive" message before Jander does.  I'm speculating that a third node in the cluster may have been responsible for part of the delay.






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