Elasticsearch on EC2. What kind of instance types to use?

If you allow me to be so free: would a 14 node cluster with just 8GB of
RAM be interesting (m1.large)? Or even a 28 node cluster with 4GB
(m1.medium)?

Why would you prefer that to less stronger boxes? Financially, it's all the
same in AWS, you pay for resources used, not for instances per se.

Karel

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