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(Yes I've searched and read through the discussion board )
I've installed cacti 0.84 on Windows 2000. I have it setup and running.
I have data polling, and when I run the cmd.php file manually I get data returned. When I run the cmd.php file via a scheduled task I can see that the cmd.php file is returning data, but the rrd files are only being updated with NaN.
I've tried running from a batch file, and also from a full command line, etc.. without luck.
I've checked the permissions on all the files and I've for the moment assigned everyone full permissions on all of the files and folders.
If you are seeing NaN's in your RRD files, they are probably not being updated at all. My intuition tells me permissions. You have the permissions set so rrdtool.exe can write to ALL of the files in Cacti's 'rra/' directory? Also you should make sure that the user cmd.php runs as has permission to execute rrdtool.exe.
rrdtool create filename [--start|-b start time] [--step|-s step] [DS:ds-name:DSTmin:max] [RRA:CF:xff:steps:rows]
...
min and max are optional entries defining the expected range of the data supplied by this data source. If min and/or max are defined, any value outside the defined range will be regarded as *UNKNOWN*.
...
What is your min and max and what are the values you are trying to put in the rrd?
You can make a dump of your rrd file with:
rrdtool dump filename.rrd > filename.xml
and check the min max values and the last time the rrd file was updated.
I've read through the manual quite a few times.. I've also found that if I run the command manually from a dos prompt while logged in as the Administrator account the graphs will update.
)
min:max] [RRA:CF:xff:steps:rows]