Different memory on different nodes

Is it OK to configure ES on different nodes to use different amount of memory?
Can one configure one node to serve as a login node to submit ES jobs but do not do any computations?
Thank you,

That's fine to have dedicated data nodes, dedicated master nodes, dedicated ingest nodes and coordinating nodes which have different memory size allocated per type of node.

Also data nodes can be cold, warm, hot with different memory settings but that is super advanced settings...

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