# Filter data already exists into ES

**URL:** <https://discuss.elastic.co/t/filter-data-already-exists-into-es/136994>\
**Category:** Logstash\
**Created:** [June 22, 2018, 9:00am UTC](https://discuss.elastic.co/t/filter-data-already-exists-into-es/136994 "2018-06-22T09:00:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kimfut](https://avatars.discourse-cdn.com/v4/letter/k/b9e5f3/32.png) [@kimfut](https://discuss.elastic.co/u/kimfut)\
**Post date:** [June 22, 2018, 9:00am UTC](https://discuss.elastic.co/t/filter-data-already-exists-into-es/136994/1 "2018-06-22T09:00:12Z")

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hello every one ;

i would like to know if is it possible to apply grok filter for data already exists into elasticsearch and filtered before , for your information i have ELK stack via docker , so everytime i do docker-compose down & up for apply a new grok filter configuration but in each time i have to reload data into elasticsearch , but when i added persistant data option when i modify the grok filter config then make containers down & up , data dont lost but stay with the old filter configuration .

thanx

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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 20, 2018, 9:00am UTC](https://discuss.elastic.co/t/filter-data-already-exists-into-es/136994/2 "2018-07-20T09:00:13Z")

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