You could create a script that computes the counts you're looking for, a naïve one-liner counting the files and directories in a path could be this:
cd /path/to/count; date; pwd; ls | wc -l
Then configure that as a scripted input in your Splunk.
Sure. Say you saved my one-liner or your much better script to
$SPLUNK_HOME/etc/apps/your_app/bin/dircount.sh, then you can define this in inputs.conf:
[script://$SPLUNK_HOME/etc/apps/your_app/bin/dircount.sh] index = your_index sourcetype = your_sourcetype interval = number of seconds between runs
You can also configure this through the UI if run on a Searchhead, Indexer, or Heavy Forwarder by going to Settings -> Data Inputs -> Scripts -> New.
Find the docs here: http://docs.splunk.com/Documentation/Splunk/6.1.3/Data/Setupcustominputs
I want just to calculate the number of directories and files in a specific folder ! so if it is possible to not index data it will be good. If not i want to have the count and create a dashboard like that :
DIRECTORY NumberOfFiles NumberOfDirectories
Dir Name NBFiles NBDir
So How could i do this ?