Exam SPLK-1001 topic 1 question 45 discussion

Reducing search execution time is the key phrase here. On page 107 of the pdf it shows reduced execution time by adding fields +. Dedup would reduce the amount of data but we still need to retrieve it first. It wouldn’t actually do anything to reduce the execution time.

D is Correct. Dedup command removes duplicates. Sometimes your data will not have duplicates so this does not guarantee any search optimization. Fields command specifies fields you want to include in the search. Inclusion is better then exclusion. Fields command improves performance and executes before field extraction. Document on search optimization:https://docs.splunk.com/Documentation/Splunk/8.0.4/Search/Quicktipsforoptimization

The dedup command is less effective at reducing search execution time because it works only after all events have been retrieved. Its purpose is to remove duplicate events based on specified fields, which helps in organizing results but doesn't impact the initial data retrieval process. Since dedup is a post-processing command, placing it early in a search doesn’t reduce the volume of data initially retrieved or processed. In contrast, fields + limits the fields retrieved at the very start, reducing memory usage and processing time, which directly impacts search speed.

I would say A is correct. We want to minimise the amount of time it will take for the search job and removing duplicates is the best way to do it.

A is the correct answer.

I will bet on ans A - because the question says when placed early in search. It should be Dedup. This improves the search which otherwise would have taken more time.

A. dedup (deduplicate) is most effective at reducing search execution time when placed early in a search. This is because dedup removes duplicate events from the results, reducing the amount of data that needs to be processed. By removing duplicates, the search can be more efficient, reducing search execution time. The other commands (rename, sort, and fields) also have their uses, but they are not as effective at reducing search execution time as dedup when placed early in a search.

fields + , will only include fields from the field-list. dedup, will only start sorting (de duplication) process after all the results is collected. so fields + is the most efficient.

A is correct based on the way of the question is asked. Document P106 --> Field extraction is the most costly part of a search, adding / removing does not change the fact.

A is correct.

Fileds + will search only the fields that you need and does not do any extraction on other fields

D (fields +) is correct. This is because the fields command is a Distributable streaming command (https://docs.splunk.com/Documentation/Splunk/8.2.5/SearchReference/Fields) i.e. it is executed on the indexer before field extraction occurs and the results sent to the search head for further processing. The dedup command is a streaming command or a dataset processing command, depending on which arguments are specified with the command. Thus it does not serve to optimize searches, in fact in some instances it may negatively impact performance (https://docs.splunk.com/Documentation/Splunk/8.2.5/SearchReference/Dedup).

A is correct. P.92

100% sure dedup is correct

D is correct pag 106 To include, use fields + (default) – Occurs before field extraction – Improves performance

A, NOT D

I don't think D should be correct because the syntax being used is "fields +", which adds fields and could make the search longer. Executing a dedup early will remove a lot of redundancy.