Friday, August 13, 2010

DRS in action

On the Towers Cluster, 3 VM's are running on westwood (win2kmove, win2k8001, testwin2k) with no VM's running on northvale. Distributed Resource Scheduling (DRS) thresholds are set to "moderately aggressive".

win2k8001 is a windows Server 2008 x64 VM.

A small looping vbscript program is placed on the
win2kmove VM. Each instance of this program will continuously run 3 million sine calculations. This will busy the cpu on westwood to simulate heavy activity.

Four of these looping scripts are started on VM win2kmove, which causes westwood's CPU to raise to over 60%. This exceeds the DRS thresholds and within 4 minutes, vSphere's DRS moves VM win2k8001 from westwood to northvale. At the moment, there are no specific resource pools defined.

This test confirms DRS functionality.

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