Cacti will automatically take care of creating the '.rrd' databases for rrdtool. As long as you have created the appropriate data sources within cacti and make sure the 'cmd.php' entry is in your crontab; everything should work.
Tell me if you have any problems with this.
-Ian
How can create a rrd for cacti..i need help
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The magic is in the same routine that updates the RRDs with the information supplied: It also CREATES the RRDs it they doesn't exists.
So, as Rax stated, in the next execution of cmd.php, the RRDs will be created.
If they don't appear in RRA directory, try copy'n'paste the command in the operating system to figure out if RRDTOOL returns an error.
It happened with me when SNMP Wizard read an interface with speed not set (ie, zero). So RRDTOOL CREATE refused because speed MIN and MAX were the same. And CACTI doesn't check the result code of RRDTOOL command.
-Gilson
So, as Rax stated, in the next execution of cmd.php, the RRDs will be created.
If they don't appear in RRA directory, try copy'n'paste the command in the operating system to figure out if RRDTOOL returns an error.
It happened with me when SNMP Wizard read an interface with speed not set (ie, zero). So RRDTOOL CREATE refused because speed MIN and MAX were the same. And CACTI doesn't check the result code of RRDTOOL command.
-Gilson
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