# Multi data center replication **URL:** \ **Category:** Elasticsearch\ **Created:** [October 12, 2011, 5:52pm UTC](https://discuss.elastic.co/t/multi-data-center-replication/5580 "2011-10-12T17:52:13Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Mike\_Peters](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mike_peters/32/3022_2.png) [@Mike\_Peters](https://discuss.elastic.co/u/Mike_Peters)\ **Post date:** [October 12, 2011, 5:52pm UTC](https://discuss.elastic.co/t/multi-data-center-replication/5580/1 "2011-10-12T17:52:13Z")
Hi, We have two ElasticSearch clusters - one on the east coast and one on the west coast, representing the same index. The goal is fault tolerance in case one of our data center goes down. Since the current version of ElasticSearch doesn't seem to be multi data-center aware like Cassandra, we have a backend daemon that feeds any updates done on the east coast, to the west coast ElasticSearch and vice versa. Wondering if others who are using ElasticSearch in a multi data-center configuration are using a similar setup or if there's a simpler mechanism? Thanks, Mike Peters ---
**Author:** ![newelasticuser](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@newelasticuser](https://discuss.elastic.co/u/newelasticuser)\ **Post date:** [September 7, 2016, 3:48pm UTC](https://discuss.elastic.co/t/multi-data-center-replication/5580/2 "2016-09-07T15:48:19Z")
We are planning to implement a similiar configuration to have multi data center. Do you know how the licensing works for the other inactive (ie active-passive) data centers? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 10:22pm UTC](https://discuss.elastic.co/t/multi-data-center-replication/5580/3 "2017-07-05T22:22:02Z")