# Replication of cluster data
**URL:** https://discuss.elastic.co/t/replication-of-cluster-data/177866
**Category:** Elasticsearch
**Created:** [April 22, 2019, 2:17pm UTC](https://discuss.elastic.co/t/replication-of-cluster-data/177866 "2019-04-22T14:17:01Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@leoberbert](https://discuss.elastic.co/u/leoberbert)
#### Post date: [April 22, 2019, 2:17pm UTC](https://discuss.elastic.co/t/replication-of-cluster-data/177866/1 "2019-04-22T14:17:01Z")
Dear,
I have 4 nodes, where node 1 is the master and the others are data type. I have noticed that the same disk space occupied by data nodes are the same, ie they all have the same information.
This is correct? I have this doubt because in this way the use of disk will be enormous in all the machines of the cluster.
Att,
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### Author:  [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)
#### Post date: [April 22, 2019, 4:13pm UTC](https://discuss.elastic.co/t/replication-of-cluster-data/177866/2 "2019-04-22T16:13:31Z")
By default Elasticsearch keeps two copies of each shard (one primary and one replica) on separate nodes in case one fails. You can of course adjust this to taste. Perhaps [this section of the manual](https://www.elastic.co/guide/en/elasticsearch/reference/current/getting-started-concepts.html#getting-started-shards-and-replicas) is helpful?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 20, 2019, 4:13pm UTC](https://discuss.elastic.co/t/replication-of-cluster-data/177866/3 "2019-05-20T16:13:40Z")
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