# Upgrading data/master nodes to master-only / data-only **URL:** \ **Category:** Elasticsearch\ **Created:** [October 23, 2014, 7:18pm UTC](https://discuss.elastic.co/t/upgrading-data-master-nodes-to-master-only-data-only/20409 "2014-10-23T19:18:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![mhughes](https://avatars.discourse-cdn.com/v4/letter/m/85e7bf/32.png) [@mhughes](https://discuss.elastic.co/u/mhughes)\ **Post date:** [October 23, 2014, 7:18pm UTC](https://discuss.elastic.co/t/upgrading-data-master-nodes-to-master-only-data-only/20409/1 "2014-10-23T19:18:00Z")
Currently have three-node cluster in a single data center; all nodes are both master/data eligible. I'm trying to migrate to six-node cluster across three separate DCs for increased reliably with this topology: DC1: 1. Master-only 2. Data-only DC2: 1. Master-only 2. Data-only DC3: 1. Master-only 2. Data-only Any suggestions for how to upgrade my existing boxes to this to minimize downtime? Can I reuse existing boxes? What happens when a data-node gets transformed into master-only? Will it offload its existing indicies? Or should I just do full cluster backup, startup new boxes, and restore? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/a10d8a4e-80fe-4656-a988-eee1a432814f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/a10d8a4e-80fe-4656-a988-eee1a432814f%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:54am UTC](https://discuss.elastic.co/t/upgrading-data-master-nodes-to-master-only-data-only/20409/2 "2017-07-06T00:54:07Z")