[smokeping-users] Re: Final email ;)
oetiker at ee.ethz.ch
Sat Dec 13 00:52:07 MET 2003
Yesterday Simon Westlake wrote:
> On 12/12/2003 at 4:47 PM PAUL WILLIAMSON wrote:
> >Create a second configuration file with a separate daemon, buy a bigger
> >box or
> >obtain another box.
> >Any way you slice it, if the tests aren't completing in the time allotted,
> >results will not be correct.
> >Maybe don't send out so many packets or ping at wider than 5 minute
> Well, that's the thing.. I want to know for 100% sure if it's
> just that the box can't handle it.
> I don't think it's the case. It's a dual xeon 2.4ghz, 2gb ram,
> raid0 15k scsi drive - seems like it has enough I/O and CPU, and
> if I watch while smokeping/fping are going, the usage is
> relatively minimal.
> If the fact is that it's not finishing in time, I'll live with
> it. If that's not the case, I'd like to try and figure out a way
> around it. I guess what I'm trying to find out is:
> If the tests don't complete in time do they:
> a) make a gap in the graph
> b) duplicate the previous entry
buying a bigger box will not help ... the reason it is not
finishing is latency ... pinging just takes time ... fping has to
wait for the responses of all these boxes out there ... but as i
said, fping takes many parameters and you might want to play with
note that smokeping does not actually duplicate entries. It just
tries to build some sort of curve between the different ping times
... the curve is built in 5 minute steps (by default) if an update
comes late there is some tolerance built in where smokeping will
continue to keep the curve connected ... if the update does not
arrive for too long a time the curve will get broken.
oh yes, and note that the curve we are building is stair shaped ...
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