Can data nodes have different size of disk in one cluster?

Elastic Stack Elasticsearch
1

does anyone know any concern if I construct a cluster with data nodes with different disk size?
e.g.
5 data nodes with 200GB Disk
5 data nodes with 1TB disk and
5 data nodes with 10TB disk.

Will this cause any issue if the data size fill up those small nodes?

2

Elasticsearch assumes all nodes have the same amount of disk so that would cause a problem unless you divide your cluster into "zones" using shard allocation filtering, e.g. hot/warm/cold architecture.

3

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