Storage per heap?

Elastic Stack Elasticsearch
1

is there a recommended storage size per heap for a node at all?

for example; if you have 16GB heap would 5tb of data for that node be too much? or if you have a node with 32GB for the heap, can it handle 10tb of data?

i couldnt find anything in the documentation and searching google has produced no results. hopefully someone here can point me in the right direction.

2

Because it all depends.
What sort of data? What sort of queries? How many EPS/QPS? What version of ES? What version of the JVM? What do your mappings look like? How many shards? What sort of infrastructure?

3

currently i have 7 data nodes, ~32GB heap, 10TB of storage

as for indexes there are a few different types. all of the documents are small for each index, some are larger than others (depending on the source). the one i'm mostly concerned about;

daily average size is ~300GB with 275M documents - this will be the most frequently queried index (doc values is set). mappings on this one are quite large -- lots of fields and types, but small documents, 10 shards, 1 replica

other indexes vary quite wildly, but nothing like that
index #2 - imported once per quarter (from static csv dataset), average size of 100GB, 95M documents, 5 shards, 2 replicas

the 3rd index i'm currently building, so no real stats there that i can use

i got carried away there; forgot to add, elasticsearch 1.7.5, latest oracle java 8

in terms of EPS, currently sits at an index rate of about 6K according to marvel, however thats about to get a dramatic increase over the next few months