[drraw-users] Why is granularity 30 minutes?

[Zembower, Kevin]

I don't understand something regarding drraw (version SVN-SNAPSHOT [1526 post 2.2b1]). I have an RRD created by this script:

kevinz at centernet:/usr/local/src/rrd$ cat createinboundlatency
#! /bin/sh

#Creates an RRD for recording inbound web page latency to http://www.jhuccp.org/ from various hosts

#Read every five minutes
#Average one reading every 5 minutes and store 24 hours
#Average 5 readings (30 min) and store 1 week
#Average 24 readings (2 hr) and store 31 days
#Average 288 readings (24 hr) and store 1 year
#Average 2016 readings (1 wk) and store 5 years
rrdtool create /var/log/rrd/inlatency.rrd \
  --start ` date +"%s"`  \
  --step 300             \
  DS:dailyrazor:GAUGE:600:0:U \
  RRA:AVERAGE:0.5:1:288  \
  RRA:AVERAGE:0.5:6:84  \
  RRA:AVERAGE:0.5:24:372  \
  RRA:AVERAGE:0.5:288:365 \
  RRA:AVERAGE:0.5:2016:260

kevinz at centernet:/usr/local/src/rrd$

I update this RRD every 5 minutes. However, my highest granularity graph in drraw seems to aggregate the data into 30 minute averages (see the attached image).

Is this the correct behavior of drraw? Is there any way to change it to display the full granularity that the RRD is capable of?

Thanks so much for your advice and suggestions.

-Kevin

Kevin Zembower
Internet Services Group manager
Center for Communication Programs
Bloomberg School of Public Health
Johns Hopkins University
111 Market Place, Suite 310
Baltimore, Maryland  21202
410-659-6139

-------------- next part --------------
A non-text attachment was scrubbed...
Name: inlatencydrraw.png
Type: image/png
Size: 17409 bytes
Desc: inlatencydrraw.png
URL: <http://lists.taranis.org/pipermail/drraw-users_lists.taranis.org/attachments/20081030/9b26fa84/attachment.png>