[Linux-HA] About motion time of Watchdog.

[HIDEO YAMAUCHI]

Hi Lars,

I'm sorry.
I am not good at English. Regards,

> But yes, it appears that the watchdog timeout should be less than
> deadtime.
However, the idea and I of you are the same.

Can you reflect this demand?
Or, should I register in Bugzilla?

Hideo Yamauchi.


> -----Original Message-----
> From: linux-ha-bounces at lists.linux-ha.org
> [mailto:linux-ha-bounces at lists.linux-ha.org]On Behalf Of Lars
> Marowsky-Bree
> Sent: Monday, July 14, 2008 8:12 PM
> To: General Linux-HA mailing list
> Subject: Re: [Linux-HA] About motion time of Watchdog.
>
>
> On 2008-07-14T12:27:58, HIDEO YAMAUCHI <renayama19661014 at ybb.ne.jp> wrote:
>
> > Hi All,
> >
> > I confirmed it about watchdog of Heartbeat.
> >
> > The environment that I confirmed has two resources in two
> nodes(active/standby).
> >
> > The resource of one eyes checks starting VIP.
> > The resource of two eyes is VIP(IPaddr).
> >
> > In the next sequence, a phenomenon happened.
> >
> > 1)I start Heartbeat.(version 2.1.3)
> > 2)Two resources start in the first node.
> > 3)The second node is a DC node.
> > 4)In the first node, I do kill of a master process.
> > 5)The second node detects the death of the first node.
> > 6)And, in the second node, a resource of VIP of a check starts.
> >   but watchdog does not yet exercise it in the first node.
> > 7)Fail in the start of the check resource of VIP in the second
> node by a delicate timing.
> >
> > Because the interval of watchdog becomes deadtime+10ms.
> >
> > I turn on a delay in start time(start_delay) of the first
> resource, and I solve this problem.
> > This is delay time to wait for complete of watchdog.
> >
> > Is not the interval of right watchdog shorter than deadtime?
>
> I'm sorry, I'm not sure I understand what you're saying.
>
> The watchdog timer is not a replacement for stonith; step 6+7 then would
> be prevented.
>
> But yes, it appears that the watchdog timeout should be less than
> deadtime.
>
>
> Regards,
>     Lars
>
> --
> Teamlead Kernel, SuSE Labs, Research and Development
> SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
> "Experience is the name everyone gives to their mistakes." -- Oscar Wilde
>
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