# Getting event correlation of log data across different systems using elasticsearch

**URL:** <https://discuss.elastic.co/t/getting-event-correlation-of-log-data-across-different-systems-using-elasticsearch/91051>\
**Category:** Elasticsearch\
**Created:** [June 28, 2017, 7:06am UTC](https://discuss.elastic.co/t/getting-event-correlation-of-log-data-across-different-systems-using-elasticsearch/91051 "2017-06-28T07:06:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gautamv](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@gautamv](https://discuss.elastic.co/u/gautamv)\
**Post date:** [June 28, 2017, 7:06am UTC](https://discuss.elastic.co/t/getting-event-correlation-of-log-data-across-different-systems-using-elasticsearch/91051/1 "2017-06-28T07:06:30Z")

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I have a week of log data collected across multiple systems. I have stored them in elasticsearch. I need to find a way to get correlation of log events across different systems. For example an error in the app server captured in the syslog caused a 404 error for a user captured in the HTTP Apache log.  
The major fields available in all the logs are:

1. Timestamp
2. Log type
3. Server ip address where the event was logged
4. Error message

Is there any method (using ELK or otherwise) where I can get event correlation across the different log types?

Thanks

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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:** [July 26, 2017, 7:06am UTC](https://discuss.elastic.co/t/getting-event-correlation-of-log-data-across-different-systems-using-elasticsearch/91051/2 "2017-07-26T07:06:54Z")

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