Parse out items of a list that has a variable length

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Elliott Miller

• February 25, 2021 19:44

Give the following log

Successfully processed the following files: [file_1.txt(size=1234), file_2.txt(size=5678), ..., file_n.txt(size=1234)]

I want to perform calculations, such as sum, on file sizes. I have tried using "parse multi" and "split" without any success. I might be doing things wrong and one of those might be the answer. Looking for help on how to parse out a list of items, when that list has a variable length, to then parse out items of that list individually.

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  Harinder Bhandari

  • February 25, 2021 20:05

  Hi Elliot,

  You should parse regex and use multi option to parse list of items of variable length. For Example:

  | parse regex "size=(?<file_size>.*?)\)\," multi

  https://help.sumologic.com/05Search/Search-Query-Language/01-Parse-Operators/02-Parse-Variable-Patterns-Using-Regex 

  Hope this helps.

  Thanks.

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  Kevin Keech2

  • February 25, 2021 20:18

  Agree with using parse regex / multi. Here is another example that captures the file name as well as the size. 

  | parse regex "(?:\[|,\s+)(?<name>.*?)\(size=(?<size>\d+)\)" multi

  When using the Multi option each instance of the matching string will become a separate message line in the results. You can use the _messageID metadata to sum these up per the original message if this is what you're needing. 

  | parse regex "(?:\[|,\s+)(?<name>.*?)\(size=(?<size>\d+)\)" multi
  | sum(size) as total_size by _messageid
  | fields - _messageid
  
  
  
  

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  Elliott Miller

  • February 26, 2021 03:48

  Thank you for the help, these answers worked for me!

  I do wish there was some more direct operator that would parse out lists. Regex feels like a hack of a solution. It works, so that's enough for now.

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