Splunk Search

Filter a Search by Field Value, using Rex

ctallarico20
Path Finder

Hi, I'm looking for a way to run one summary index search on all files of the same sourcetype, and then identify individual files by defining characteristics. For example, a sample log output is:

222 Mon Jun 16 07:00:47 EDT 2014 13384426 2 PS MarkSweep 0 0.0 0 0.0 519045120 524288000 519045120 119919880

and I know that every log from this file will contain either "PS MarkSweep" or "PS Scavenge" in the same position, which in this case is rex field | rex "(?i)^(?:[^ ]* ){5}\\d+\\t\\d+\\t\\d+\\t(?P<FIELDNAME>[^\\t]+)" |. How can I run the search returning results only where FIELDNAME is "PS MarkSweep" or "PS Scavenge"? Thank you!!

martin_mueller
SplunkTrust
SplunkTrust

Not sure if I understand the question correctly, but I'd do this:

PS MarkSweep OR Scavenge | rex "(?i)^(?:[^ ]* ){5}\\d+\\t\\d+\\t\\d+\\t(?P<FIELDNAME>[^\\t]+)" | search FIELDNAME="PS MarkSweep" OR FIELDNAME="PS Scavenge"

Note, the bit in the front is for performance gain - that way Splunk will only load events off disk if they contain those words. Consider adding the field extraction to the sourcetype in props.conf.

chimmi04
Explorer

Aha Its the search command I was looking for, thanks @martin_mueller 🙂

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