# Logstash Duplicate Data Output?

**URL:** <https://discuss.elastic.co/t/logstash-duplicate-data-output/97168>\
**Category:** Logstash\
**Created:** [August 16, 2017, 2:22am UTC](https://discuss.elastic.co/t/logstash-duplicate-data-output/97168 "2017-08-16T02:22:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jogoinar10](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jogoinar10/32/20068_2.png) [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)\
**Post date:** [August 16, 2017, 2:22am UTC](https://discuss.elastic.co/t/logstash-duplicate-data-output/97168/1 "2017-08-16T02:22:51Z")

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My input is from elasticsearch. I want to combine multiple indices in one index.  
As I'd output the data in the elasticsearch, I can see that the data is much more data if I total from the source than the combined data.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 13, 2017, 2:22am UTC](https://discuss.elastic.co/t/logstash-duplicate-data-output/97168/2 "2017-09-13T02:22:52Z")

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Closed on September 13, 2017, 2:22am UTC

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