[smokeping-users] Slave gaps in all charts during outage

Josh Luthman josh at imaginenetworksllc.com
Fri Sep 18 01:56:10 CEST 2009

Oh I see.  I understood you incorrectly.

It is open source...

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373

"When you have eliminated the impossible, that which remains, however
improbable, must be the truth."
--- Sir Arthur Conan Doyle

On Thu, Sep 17, 2009 at 7:38 PM, David Rees <drees76 at gmail.com> wrote:

> On Thu, Sep 17, 2009 at 4:36 PM, Josh Luthman
> <josh at imaginenetworksllc.com> wrote:
> > Well if communication between the two servers was just fine on layer 3
> but
> > it couldn't resolve, layer 7, your problem there was that the slave
> didn't
> > know what IP the master was.
> >
> > You could up the TTL to 4 hours and it could have worked in that last
> > scenario, or 8 hours, etc.
> >
> > For DNS on something like this I suggest you keep a long record, we'll
> say a
> > week.  If you know you're going to change it, change the TTL for half an
> > hour or a full hour a week in advance of the change.  Then change it to
> the
> > new IP and put the TTL back to a week.
> Yes, that's all fine - but the DNS issue with one of the hosts the
> slave was monitoring prevented it from monitoring ALL hosts it was
> supposed to be monitoring...  So if DNS for one host stops working for
> whatever reason, that shouldn't keep it from monitoring other hosts.
> -Dave
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