conf slide about Search Efficiency Optimisation. To remove those events as well use the NOT MsgId="*AUT20915*", but this will be a bad performer on large searches. Keep in mind, try to avoid NOT search, instead search for what you want and need.Īlso keep in mind if you have multi value fields, it will still match events which for example holds a value of MsgId="AUT11111, AUT20915". Splunk will automatically perform the equivalent of expanding the search string for. (MsgId=AUT22670 OR MsgId=AUT24414 OR MsgId=AUT22673 OR MsgId=AUT23574 OR MsgId=AUT20915 OR MsgId=AUT22886) Splunk Search: Re: NOT like multiple values Options. For more tips on search optimization, see Quick tips for optimization.I don't know why you do it this way, because your base search is searching for the multiple MsgId but further down the pipe you discard them uld it be those are multivalve fields and/or your events are not properly line broken? Anyway, probably you have a reason to do so so let me help you. You can use the where command to: Search a case-sensitive field. It uses eval-expressions that return a Boolean result (true or false), and only returns results for which the eval expression is true. The execution cost for a search is actually less when you explicitly specify the values that you want to include in the search results. The Splunk where command is one of several options used to filter search results. Using the != expression or NOT operator to exclude events from your search results is not an efficient method of filtering events. Description Use the search command to retrieve events from indexes or filter the results of a previous search command in the pipeline. Searching with != or NOT is not efficient Since I don't know what the rest are, I can't. If you use regular expressions in conjunction with != in searches, see regex. I know how to filter for a specific event so, for example, I always run this: sourcewineventlog: earliesttime-24h 'TypeSuccess' But what I'd now like to do is the opposite: I'd like to eliminate all these 'successes' so I can see all the rest. The following example uses the cidrmatch and if functions to set a field, isLocal, to 'local' if the field ipAddress matches the subnet. If you search for a Location that does not exist using NOT operator, all of the events are returned. Splunk, it looked like this: As you can see, this alert takes the original poor. Source="Ponies.csv" NOT Location="Calaveras Farms" ID search for large files in our network logs that were being sent from. This includes events that do not have a Location value. What Im trying to do is when the value, run a separate query and when the value is anything else but run a different query. 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. For more information about when to use the append command, see the flowchart in the topic About event grouping and correlation in the Search Manual. The append command runs only over historical data and does not produce correct results if used in a real-time search. Source="Ponies.csv" Location!="Calaveras Farms" ID Appends the results of a subsearch to the current results. 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. 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. Note that in Splunk when you are including multiple evaluations in a where or eval statement you have to include the boolean AND. 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. Returns true if the event matches the search string X. When you want to exclude results from your search you can use the NOT operator or the != field expression. 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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |