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Cores in A6 instance used in hdinsight cluster

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Hello!

I am trying to run some experiments using a VM and I choose an A6 instance (4 cores, 28GB, Intel Xeon processor) which shows that there are only 4 physical cores and no hyperthreading (therefore 4 logical processors).

I have also built a HDInsight cluster with an A6 instance datanode and namenodes. I connected through the remote desktop and checked for the processors available through commandline and got 4 cores and 4 Logical processors. Yet when I run my application on the cluster and check the Hadoop Yarn Status web UI for the nodes that are up and running, there is a section under cluster metrics that says "VCores Available: 8". 

Can anyone clarify why there is a discrepancy seen in the cluster?

Thank you! 




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