[rrd-users] recreating XSysStats with rrd?

[Ciaran.Deignan at bull.net]

Hi,

I started out just wanting to be able to print the display of "xsysstat",
now it looks like I'm redoing it ;-)

xsysstats uses the system call "rstats( host, struct * stats)", and then
draws a real-time graph. I don't want a real-time graph, but I do want to
keep the samples for a longer time and do more analysis on it.

I'm half-way there, and I'm only just wondering if anyone has already done
this? My experimental program to copy from rstats() to rdd-tool is in
attachement. I can run this command from cron, every minute if I want, and
it will dump the numbers to rdd-tool.

I was thinking of creating an rrt database as follows:

# 1 sample every 60 seconds
# keep each data point for 1 day = 24 hours * 60 minutes = 1440, say 1500
# keep hourly average for 1 month = 30 days * 24 hours = 720, say 800
#  (1 hour = 60 minutes)
# keep 6-hour average, min and max for a year = 366 days * 4 6-hours = 1480
#  (6 hours = 6*60 minutes = 360)

	rrdtool create localhost.rrd \
		--step 60 \
		DS:user:COUNTER:600:U:U \
		DS:sys:COUNTER:600:U:U \
		DS:wait:COUNTER:600:U:U \
		DS:idle:COUNTER:600:U:U \
		DS:opackets:COUNTER:600:U:U \
		DS:ipackets:COUNTER:600:U:U \
		DS:obytes:COUNTER:600:U:U \
		DS:ibytes:COUNTER:600:U:U \
		DS:pgpgin:COUNTER:600:U:U \
		DS:pgpgout:COUNTER:600:U:U \
		DS:pswpin:COUNTER:600:U:U \
		DS:pswpout:COUNTER:600:U:U \
		DS:intr:COUNTER:600:U:U \
		DS:disk1:COUNTER:600:U:U \
		DS:disk2:COUNTER:600:U:U \
		DS:disk3:COUNTER:600:U:U \
		DS:disk4:COUNTER:600:U:U \
		RRA:AVERAGE:0.5:1:1500 \
		RRA:AVERAGE:0.5:60:800 \
		RRA:AVERAGE:0.5:360:1500 \
		RRA:MIN:0.5:360:1500 \
		RRA:MAX:0.5:360:1500

This is my first serious attempt at creating a database structure,
has anyone any suggestions/optimisations?

Has anyone got any good ideas on how to present the information?
The CPU info is fairly easy (pity rstats() doesn't give "wait" info),
for example

        rrdtool graph localhost_avg.gif \
                "DEF:user=$host.rrd:user:AVERAGE" \
                "DEF:sys=$host.rrd:sys:AVERAGE" \
                "DEF:idle=$host.rrd:idle:AVERAGE" \
                "AREA:user#ff0000:user" \
                "STACK:sys#00FF00:sys" \
                "STACK:idle#0000FF:idle" 

and
        cmd rrdtool graph localhost_extreem.gif \
                "DEF:user=$host.rrd:user:MAX" \
                "DEF:sys=$host.rrd:sys:MAX" \
                "DEF:idle=$host.rrd:idle:MIN" \
                "LINE3:user#ff0000:Max User" \
                "STACK:sys#00FF00:Max Sys" \
                "LINE1:idle#0000FF:Min Idle"  \


Equally, has anyone interfaced rrd with SAR for addiotional information on
the current host?

Thanks,
Ciaran

+-------------------------------------------------------------------------+
Ciaran Deignan                                Tel: (France) 04 76 29 79 92
BULL XS-BU (http://www-frec.bull.com)                 HA and Consolidation

Mail to: Ciaran.Deignan at bull.net                        Bullcom: 229 79 92
PGP: B1 78 FB 88 FD 86 58 A8  89 7B 22 8C D0 E8 71 FC       Fax: 229 75 18
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