# Multiple logstash
**URL:** https://discuss.elastic.co/t/multiple-logstash/253009
**Category:** Logstash
**Created:** [October 22, 2020, 1:40pm UTC](https://discuss.elastic.co/t/multiple-logstash/253009 "2020-10-22T13:40:42Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Aniket\_Pant](https://discuss.elastic.co/u/Aniket_Pant)
#### Post date: [October 22, 2020, 1:40pm UTC](https://discuss.elastic.co/t/multiple-logstash/253009/1 "2020-10-22T13:40:43Z")
I want to add 2 logstash in my application for scalability.From availablity point... I have a question does 2 logstash works simultaneously or they works as a active-passive (one stop other takes) or they automatically manage the load and yes i have multiple pipelines id.
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### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [October 22, 2020, 2:36pm UTC](https://discuss.elastic.co/t/multiple-logstash/253009/2 "2020-10-22T14:36:15Z")
logstash does not support clustering. If you have two copies of logstash they will both process their inputs. For a tcp or http input you could put a load balancer in front of them and each request would get processed in one of the two. For a file input they would both read the file and all of the data would be duplicated.
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### Author:  [@Aniket\_Pant](https://discuss.elastic.co/u/Aniket_Pant)
#### Post date: [October 23, 2020, 3:47pm UTC](https://discuss.elastic.co/t/multiple-logstash/253009/3 "2020-10-23T15:47:09Z")
I want to know that if i have some logstash pipeline files do i need to keep these logstash pipeline files in both the nodes..if i do this then i have duplicate data in elasticsearch and the reason i want to use 2 logstash is for high availability but it seems that it's not good idea to have 2 logstash
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### Author:  [@Kickinsix](https://discuss.elastic.co/u/Kickinsix)
#### Post date: [October 24, 2020, 1:32am UTC](https://discuss.elastic.co/t/multiple-logstash/253009/4 "2020-10-24T01:32:30Z")
I have 5 logstash instances that pull from 3 Redis servers so it will never create duplicate documents. If you're concerned about the same file data going to each logstash then create a unique document ID. GL
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 21, 2020, 1:32am UTC](https://discuss.elastic.co/t/multiple-logstash/253009/5 "2020-11-21T01:32:34Z")
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