I'm new here, for please forgive for any changes from expected format.
ES version: 7.5
I'm going to deploy a hot-warm-cold architecture, with dedicated data, master and ingest nodes. However, even our 'hot' section of data is to be kept for 180 days, and would be around 50TB (total, including replicas).
Keeping a disk to ram ratio of 24, i will still need about 40 nodes to handle this, if i'm to keep it below 64GB memory for a node ( i have heard somewhere not to go above 64GB per node).
Is there an actually a recommended limit of 64GB, or can i go up to 256GB or so without issues per node?
And that so called disk:ram ratio, is it calculated using replicated total size of disk or using a single replica only.