[hobbit] how to decrease default step of 300sec to 60sec in hobbitd_rrd

Hi Thomas,

thank you for your response on Sunday, I've found this in the source of the latest beta release today morning as well.

But unfortunately I have to deal with our production environment, and I would like to avoid going to the next release this time. If there is no other chance to realize this by patching the 4.2.3 sources, I have to go this way.

Today I tried to make use of the compiled hobbitd_rrd from 4.3.0 and inserted into my env, modified and copied the hobbit-rrddefinitions.cfg into etc. It worked so far, but for all my SPLITNCV I get a:

2009-11-08 14:11:12 RRD error creating xxxxxx.rrd: Duplicate DS name: lambda

I will try to locate the missing files to patch to make this work, but I'm afraid that I have to update all the xymon stuff. (Its some work to do, because we have a heavy modified xymon running).

Any other hints somebody?

Norbert Kriegenburg

From: Thomas Eckert <tom at IT-Eckert.de>
To: hobbit at hswn.dk
Date: 08.11.2009 14:34
Subject: Re: [hobbit] how to decrease default step of 300sec to 60sec in hobbitd_rrd

Hi Norbert,

from a grep in the source (xymon-4.3.0_beta2) I _guess_ that it's in hobbitd/do_rrd.c: around line 52: /* How often do we feed data into the RRD file */ #define DEFAULT_RRD_INTERVAL 300 static int rrdinterval = DEFAULT_RRD_INTERVAL;

To make use of all this you need to send data every minute too of course.

Cheers,

         Thomas

Norbert Kriegenburg wrote:

Hi guys,

we are monitoring with BigBrother/bbgen/xymon since a couple of years now with great success. Nothings beats the flexibility and speed of xymon.

But now I have a problem I can't find a solution for (xymon 4.2.3. on RHEL):

I have to design all the rrd files to collect data with a cycle of 60sec insted of the default 300sec. I found the places where I have to set up the new definitions of the RRAs in hobbitd_rrd.c:

static char rra1[] = "RRA:AVERAGE:0.5:1:2880"; /* 60s for 2d */ static char rra2[] = "RRA:AVERAGE:0.5:5:20160"; /* 60s for 2w */ static char rra3[] = "RRA:AVERAGE:0.5:15:5760"; /* 900s for 8w */ static char rra4[] = "RRA:AVERAGE:0.5:60:12096"; /* 1h for 18m */ static char rra5[] = "RRA:MAX:0.5:1:2880"; static char rra6[] = "RRA:MAX:0.5:5:20160"; static char rra7[] = "RRA:MAX:0.5:15:5760"; static char rra8[] = "RRA:MAX:0.5:60:12096";

and the definitions in do_*.c to: sprintf(dsdef, "DS:lambda:%s:120:U:U", dstype); and so on to reflect the shorter cycle.

Compiled everything, and copy the new hobbit_rrd as hobbit_rrd1minute into $BBHOME/bin I created a new channel (in parallel to the working hobbit_rrd) with own rrd-dir and logfile:

[rrdstatus1minute] ENVFILE /opt/xymon/server/etc/hobbitserver.cfg NEEDS hobbitd CMD hobbitd_channel --channel=status --log= $BBSERVERLOGS/rrd-status1minute.log hobbitd_rrd1minute --rrddir= $BBVAR/rrd1minute INTERVAL 1m

Everything is working, the rrdfiles where created, but if I do a "rrdtool info examplefile.rrd", I only find the default step of 300s:

rrd_version = "0003" step = 300 last_update = 1257631284 ds[lambda].type = "GAUGE" ds[lambda].minimal_heartbeat = 120

There are no values collected ("NaN"), and all files where updated only every 5min and not every 60s.

I did'nt find the place, where I can define the rrdcreate with "--step 60".

Unfortunately I have no chance to switch everything to extra-scripts, because we have a quite complex and dynamic environment in our monitoring and I'm glad, that everything is running smooth (mostly using SPLITNCV).

Any hints, what I have to change to collect my rrd-values with a 60sec cycle?

help is greatly appreciated thank you

Mit freundlichen Grüßen / Kind regards

Norbert Kriegenburg

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