[hobbit] Problem with ncv

[Francesco Duranti]

The problem related to graphs with 20 minutes interval is in the
creation of the rrd file

>From the rrdcreate help page
http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html

    DS:ds-name:GAUGE | COUNTER | DERIVE | ABSOLUTE:heartbeat:min:max

 The ``heartbeat'' defines the maximum acceptable interval between
samples. If the interval between samples is less than ``heartbeat'',
then an average rate is calculated and applied for that interval. If the
interval between samples is longer than ``heartbeat'', then that entire
interval is considered ``unknown''. Note that there are other things
that can make a sample interval ``unknown'', such as the rate exceeding
limits, or even an ``unknown'' input sample.

The heartbeat used by hobbit for ncv (and other graphs) is 600 (10 min)
and cannot be changed with parameters so you need to change the source
code (but it will change heartbeat for all the NCV graphs you do and
you've to remember to change it when installing a new version) or we
have to wait for Henrik to do a new rrd extendible interface for all our
special graphs cases :D
If you need to change you've to change it in the hobbitd/rrd/do_ncv.c,
search for "DS:", you'll find 2 of them they are for the default and not
default cases of ncv file creation.  I don't know if there's something
else that need to be changed but this should at least get your data
inside the rrd file.

Francesco



> -----Original Message-----
> From: Marco Avvisano [mailto:marco.avvisano at regione.toscana.it] 
> Sent: Friday, September 15, 2006 3:11 PM
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] Problem with ncv
> 
> Thanks Henrick, now it work
> 
> I have another problem .... sometimes the rrd graphs lost 
> values I send data to hobbit server every 20 minutes ... i 
> must change or add something in hobbitgraph definitions?
> 
> DEF:seconds=inps.rrd:Seconds:AVERAGE
> 
> regards,
> 
> Marco
> 
> 
> 
> ----- Original Message -----
> From: "Henrik Stoerner" <henrik at hswn.dk>
> To: <hobbit at hswn.dk>
> Sent: Thursday, September 14, 2006 10:53 PM
> Subject: Re: [hobbit] Problem with ncv
> 
> 
> > On Thu, Sep 14, 2006 at 06:10:50PM +0200, Francesco Duranti wrote:
> >> I've a problem with data reporting in
> >> rrd files via ncv, I've one script that report data in this way
> >>
> >> MySQL Connection statistics
> >>
> >> Threads = 7
> >> Questions = 153015
> >> Slow queries = 0</PRE>
> >> <DIV align=left><PRE>Opens = 0
> >> Flush tables = 1
> >> Open tables = 32
> >> Queries per second avg = 0.135
> >>
> >> The rrd will get MySQLConnectionstat as the name of the 
> first data to 
> >> save in
> >> the rrd instead of getting Threads.
> >
> > This patch should fix it.
> >
> >
> > Regards,
> > Henrik
> >
> >
> 
> 
> --------------------------------------------------------------
> ------------------
> 
> 
> > To unsubscribe from the hobbit list, send an e-mail to
> > hobbit-unsubscribe at hswn.dk
> > 
> 
> 
> To unsubscribe from the hobbit list, send an e-mail to
> hobbit-unsubscribe at hswn.dk
> 
> 
>