hi,
The Add Data page
After you log into Splunk Enterprise, the Home page appears:
To add data, click the green Add Data button (to the right of the list of apps.) The Add Data page appears.
There are three options for getting data into your Splunk Enterprise instance with Splunk Web: Upload, Monitor, and Forward.
The Upload option lets you upload a file or archive of files into Splunk Enterprise for indexing. When you click Upload, Splunk Enterprise goes to a page that starts the upload process.
for more informations, follow this link:
http://docs.splunk.com/Documentation/Splunk/6.3.3/Data/Howdoyouwanttoadddata
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