I didn't search all the Redbooks, but in "IBM Data Engine for Hadoop and Spark" you can find "Solution reference architecture" chapter and there is some information on sizing. Also in the book "Hortonworks Data Platform with IBM Spectrum Scale
Reference Guide for Building an Integrated Solution" they have the following: "For information and assistance about sizing and configuring the HDP on a Power Systems
+ IBM Spectrum Scale/IBM Elastic Storage Server solution, contact the Cognitive
Systems Solution Center (email@example.com)." Also there is some information there about reference architecture they used.
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