Add 1 filed is sum of other field in logstash

[Tr_ng_Trang (Trương Trang)]

i have 2 filed is number is upbyte and downbyte, and i want to add 1 filed is bandwith (sum of there) in logstash, how can i do this?

[eperry (Ed)]

Try the aggregation filter

Aggregate filter plugin | Logstash Reference [8.11] | Elastic

Or you can always use the ruby filter if all fails

Ruby filter plugin | Logstash Reference [8.11] | Elastic

Sort of an example

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