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Last few months I was involved in a rollout project of a large application on VMware vSphere. During the phases of the rollout, we had few tricky performance issues to solve, but one of them was pretty special. This problem was more than worth writing the article: Scale-Out Application vs. NUMA Action-Affinity As the title suggests, the application was a typical Scale-Out Application with a lot of workers spread across a single VMware vSphere Cluster. VMware DRS did a great job and distributed all of the worker nodes of the Scale-Out Application across the ESXi hosts of the cluster and
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