topic How does Field discovery work on Search heads? in Deployment Architecture

How does Field discovery work on Search heads?

richnavis — Mon, 02 May 2011 13:40:37 GMT

I have a Splunk Search head that gets data from a Splunk Server that is indexing IIS logs. When I Query on the Indexing Server, SPlunk Autodiscovers the IIS headers which allows me to query using those headers.

Example: index=iis sc_status="404".

However, the fields aren't autodiscovered on the search head, so the same query doesn't return any results. Does anyone know how to populate the autodiscovered IIS fields on a search head?

Re: How does Field discovery work on Search heads?

hazekamp — Mon, 02 May 2011 16:45:18 GMT

rnavis,

By default Splunk applies a property called "KV_MODE = auto" which will extract keys and values separated by an equal (=) sign. In this case it should extract "sc_status". This would occur when searches are executed from the search head and distributed to the indexers, or the search is executed directly on the indexer.

There are a few things that would disable this:

Setting "KV_MODE = none" on host/source/sourcetype
Field discovery switch is set to off in search view (flashtimeline)