[rrd-users] Revision to question on expiration

[Mike Bernhardt]

Sorry for replying to myself, but I need to revise my explanation of
the problem. Interval: 1. Modification time of .png and .rrd is every 1
minute as expected.

What happens is that the .png shows increasing white space for
4 minutes, then fills in the white space on the 5th minute. I haven't spent
time looking into how to pull data out of the rrd file (I know...) so I
don't know if it
has 5 identical entries or if the .png isn't reflecting new data.

This occurs even when viewing the .png with an image viewer on the server.
If someone can either point to a known issue or else tell me to learn how
the rrd information for clarification, I'd appreciate it.

Mike 

-----Original Message-----
From: Mike Bernhardt [mailto:mbernhardt at arsin.com]
Sent: Wednesday, February 14, 2001 9:39 PM
To: 'steveshipway at egroups.co.uk'; rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Question on expiration



I'm using generic.cgi from Steve Shipway. I am measuring simple octets
in/out of a router interface.

In my .htaccess file, I have the exiration for *-6-*.png (this wildcards the
.pngs that are being generated) set to 30 seconds. I have the interval in my
.cfg file set to 1 minute. Indeed, the router is polled every minute. And
the .png file .rrd file are updated every 1 minute. The "Last Update" time
shown on my browser reflects the 1 minute updates (I think this reflects the
.rrd modification time).

However, the image on my browser only updates every 5 minutes. If I do a
refresh the image remains unchanged, which means that although the .png is
being updated every minute, it isn't being updated with new information.

Is there a good reason for this, and can it be changed? I don't know if it's
the cgi, the router, or rrdtool.

Thanks in advance,

Mike

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