# Multiple Output Reliability
**URL:** https://discuss.elastic.co/t/multiple-output-reliability/94772
**Category:** Logstash
**Created:** [July 27, 2017, 10:43am UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772 "2017-07-27T10:43:06Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)
#### Post date: [July 27, 2017, 10:43am UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/1 "2017-07-27T10:43:06Z")
How can I check if the data were successfully transferred to elasticsearch?
For example I got this output.
```
output {
elasticsearch1 {
hosts => ["xxx.xxx.xxx.250:9200"]
index => "logstash1-%{+YYYY.MM.dd}"
}
elasticsearch2 {
hosts => ["xxx.xxx.xxx.251:9200"]
index => "logstash2-%{+YYYY.MM.dd}"
}
}
```
1. If the server for elasticsearch 2 is down, does the data will still be transfered to elasticsearch1?
2. If the server for elasticsearch 2 is already up, will the logstash can get the previous data that was already stored in elasticsearch 1 during downtime if possible?
Thank you.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [July 27, 2017, 11:01am UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/2 "2017-07-27T11:01:15Z")
If any of the outputs is not available, Logstash will stop processing and retry sending the current data until it becomes available.
---
### Author:  [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)
#### Post date: [July 28, 2017, 2:13am UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/3 "2017-07-28T02:13:03Z")
Oh nice! 🙂
So it will be synchronize on sending the data, right?
There's **no chance** that the other output is ahead in storing data.
Thank you for your reply @Christian_Dahlqvist
---
### Author:  [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)
#### Post date: [July 28, 2017, 2:24am UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/4 "2017-07-28T02:24:26Z")
Another thing @Christian_Dahlqvist, Can I run multiple logstash so that if the 1 output is not available, output number 2 can still retrieve the data.
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### Author:  [@jogoinar10](https://discuss.elastic.co/u/jogoinar10)
#### Post date: [July 29, 2017, 7:25pm UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/5 "2017-07-29T19:25:44Z")
hmmm. up
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 26, 2017, 7:25pm UTC](https://discuss.elastic.co/t/multiple-output-reliability/94772/6 "2017-08-26T19:25:49Z")
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