I'm fairly new to EleasticSearch, but we've got 2 clusters already. A 2.4 cluster running on 2 nodes and a 6.2 cluster running on 4 nodes. Now we want to migrate the data on the 2.4 cluster to the 6.2 cluster, but what would be the best approach?
Is it possible to upgrade the 2.4 to 6.2 (using the https://www.elastic.co/guide/en/cloud-enterprise/current/ece-upgrading-v6.html topic) and just add the nodes of the first cluster to the second cluster and than later on remove the first two again?
Try an migrate the data using the Reindex API?
With kind regards,