I'm actually using a query comprised from a time a request and result
event is fired upon "rrdtool xport".
I suppose the NaNs will be inevitable due to gmetad write time differences.
The problem I face is getting this information into java... I suppose
thats more of a rrd problem than ganglia....
[EMAIL PROTECTED] wrote:
Ian,
it is the gmetad process which write the rrd files, not gmond. Are you
using "rrdtool fetch" to
get the numbers? If you don't specify an end time, rrdtool will choose
"now", so
it is almost certain you will have some Nan's at the end.
What I do is to do a "rrdtool last" first, then use that value for the
rrftool fetch.
- regards,
richard
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ian
Wootten
Sent: 08 August 2006 16:23
To: [email protected]
Subject: [Ganglia-general] Obtaining Immediate Interval Data From
Ganglia
I am facing a problem in that I would like short-segment up to date
information from ganglia in order to monitor services after invocation.
Whilst connecting to a port will provide the most immediate metrics, I
would like information over a particular time period. Inspection of
ganglia's round robin databases provides this also, but if most
immediate information is requested - i.e Invoke this service, collect
ganglia metrics for that period, many metric values are left empty
(NaN). I increase the speed at which localhost is polled, but still much
information is to be written to rrd afterwards. A second query sometime
later and these are populated. Is there a way to force gmond writes to
rrd. Or another method to obtain such information from ganglia?
Thanks,
Ian
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