For more tips on search optimization, see Quick tips for optimization. The execution cost for a search is actually less when you explicitly specify the values that you want to include in the search results. 1 Answer Sorted by: 2 Have you tried something without a regular expression, like this index'mycwindex' AND NOT 'ResponseCode:200' From what I see, this is the easiest way to filter queries by elements that does not contain 'ResponseCode:200'. No one other than designated Deloitte personnel (e.g., a Deloitte recruiter or Deloitte hiring partner) is. We consider candidates on merit and that we provide an equal opportunity to eligible applicants. Using the != expression or NOT operator to exclude events from your search results is not an efficient method of filtering events. Familiarity with SIEM log analysis and obtaining logs through applicable query languages (Splunk, McAfee, Q-Radar, Sentinel, Etc.). Searching with != or NOT is not efficient If you use regular expressions in conjunction with != in searches, see regex. If you search for a Location that does not exist using NOT operator, all of the events are returned. Source="Ponies.csv" NOT Location="Calaveras Farms" ID This includes events that do not have a Location value. Begin by specifying the data using the parameter index, the equal sign, and the data index of your choice: indexindexofchoice. This includes events that do not have a value in the field.įor example, if you search using NOT Location="Calaveras Farms", every event is returned except the events that contain the value "Calaveras Farms". If you search with the NOT operator, every event is returned except the events that contain the value you specify. If you search for a Location that does not exist using the != expression, all of the events that have a Location value are returned. Source="Ponies.csv" Location!="Calaveras Farms" ID Events that do not have Location value are not included in the results. Events that do not have a value in the field are not included in the results.įor example, if you search for Location!="Calaveras Farms", events that do not have Calaveras Farms as the Location are returned. At a high level let's say you want not include something with 'foo'. In this blog, we gonna show you the top 10 most used and familiar Splunk queries. If you search with the != expression, every event that has a value in the field, where that value does not match the value you specify, is returned. 1 Solution Solution Runals Motivator 12-08-2015 11:38 AM If you are wanting to include multiple NOTs you have to use ANDs not ORs so that it becomes an inclusive statement and not this and not this and not this. As you can see, some events have missing values. However there is a significant difference in the results that are returned from these two methods. When you want to exclude results from your search you can use the NOT operator or the != field expression.
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