I was refining an existing search/dashboard panel when I discovered that my hosts do not reliably follow a pattern. What these hosts do have in common is the presence of a sourcetype unrelated to the data in the search.
eventtype=winperformance host=myhostpattern object=logicaldisk .....
This search works nicely, but excludes hosts which do not follow the pattern. I would like to replace
host=myhostpattern with something that will search for:
sourcetype=mysource |dedup host
and use this to create the host list to use.
I have considered using an inputlookup/outputlookup, but thought there would be a better option.
Subsearch is your friend here (unless the number of hosts is huge):
eventtype=winperformance object=logicaldisk [search sourcetype=mysource | dedup host | table host]
More about subsearches: http://docs.splunk.com/Documentation/Splunk/latest/SearchTutorial/Useasubsearch
A much better performing option could be this (again it's a subsearch so more than 10,000 records will get truncated)
eventtype=winperformance [| tstats count WHERE source=mysource by host | table host ] object=logicaldisk .....
This looked promising but unfortunately I am still on version 5.x and requires a populated tsidx first. I will definitely revisit this once I updgrade to 6.x.