AWS just launched its X1 instance: https://aws.amazon.com/ec2/instance-types/x1/
X1 Instances are a new addition to the Amazon EC2 memory-optimized instance family and are designed for running large-scale, in-memory applications and in-memory databases in the AWS cloud. X1 instances offer 1,952 GiB of DDR4 based memory, 8x the memory offered by any other Amazon EC2 instance. Each X1 instance is powered by four Intel® Xeon® E7 8880 v3 (Haswell) processors and offers 128 vCPUs.
Has anyone tried running Elasticsearch on one of these instances? Would it make sense to try it?