# Logstash Parsing

**URL:** <https://discuss.elastic.co/t/logstash-parsing/136010>\
**Category:** Logstash\
**Created:** [June 14, 2018, 10:47pm UTC](https://discuss.elastic.co/t/logstash-parsing/136010 "2018-06-14T22:47:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jorgep92](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@jorgep92](https://discuss.elastic.co/u/jorgep92)\
**Post date:** [June 14, 2018, 10:47pm UTC](https://discuss.elastic.co/t/logstash-parsing/136010/1 "2018-06-14T22:47:00Z")

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Hello,

I have a question, I am using ELK. In logstash, I have created my own parsings logs and I want to ask you if I can re-process the previous logs but using my new parsings.

Thank you very much

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 15, 2018, 4:34am UTC](https://discuss.elastic.co/t/logstash-parsing/136010/2 "2018-06-15T04:34:03Z")

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You can read old logs with an elasticsearch input plugin and apply whatever transformation you want then outpost to elasticsearch again.

I moved the question to #logstash.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 13, 2018, 4:34am UTC](https://discuss.elastic.co/t/logstash-parsing/136010/3 "2018-07-13T04:34:12Z")

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