On Tue, May 18, 2010 at 2:05 PM, mike <[email protected]> wrote:
> So now that I have a few clusters up and running after a few problems
> I've started looking at the logs with some regularity. I'm hoping
> someone can confirm my thoughts on some entries in the ha-log.
>
> 1. PEngine Recheck Timer (I_PE_CALC) just popped!
> Is this entry related to the next one?

yes

> 2. info: do_state_transition: Starting PEngine Recheck Timer
> This particular entry appears every 10 minutes or so and I'll see it 3
> or 4 times in 1 or 2 minutes and then it will go away for 10 minutes.
> Then the cycle repeats.
>
> 3. info: native_merge_weights: mysql: Rolling back scores from ip_mysql.
> Now this entry I like. It appears to roll back the fail count (I think)

No.  Well not directly.
This happens when A optionally depends on B and factoring in B's
allocation preferences would mean A can't run anywhere.

> which is what my DBA was looking for. He wants mysql to failover if
> there are 3 successive failures of MySQL but only if those successive
> failures occur within 15 minutes.

You want migration-threshold=3 and failure-timeout=900000 (15 * 60 * 1000)

> If I read this one right, heartbeat
> rolls back the scores automatically. My only question is, do I only see
> this message if the scores have been rolled back and what is responsible
> to firing this thing off in the first place?
>
> Thanks
> Mike
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>
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